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server-skynet-source-3rd-je.../src/arena.c

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Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
#define JEMALLOC_ARENA_C_
Restructure source tree.
2010-02-12 06:45:59 +08:00
#include "jemalloc/internal/jemalloc_internal.h"
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
/******************************************************************************/
/* Data. */
size_t opt_lg_qspace_max = LG_QSPACE_MAX_DEFAULT;
size_t opt_lg_cspace_max = LG_CSPACE_MAX_DEFAULT;
ssize_t opt_lg_dirty_mult = LG_DIRTY_MULT_DEFAULT;
uint8_t const *small_size2bin;
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
arena_bin_info_t *arena_bin_info;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
/* Various bin-related settings. */
unsigned nqbins;
unsigned ncbins;
unsigned nsbins;
unsigned nbins;
size_t qspace_max;
size_t cspace_min;
size_t cspace_max;
size_t sspace_min;
size_t sspace_max;
size_t lg_mspace;
size_t mspace_mask;
/*
* const_small_size2bin is a static constant lookup table that in the common
Reduce size of small_size2bin lookup table. Convert all direct small_size2bin[...] accesses to SMALL_SIZE2BIN(...) macro calls, and use a couple of cheap math operations to allow compacting the table by 4X or 8X, on 32- and 64-bit systems, respectively.
2011-03-07 14:56:36 +08:00
* case can be used as-is for small_size2bin.
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
*/
Reduce size of small_size2bin lookup table. Convert all direct small_size2bin[...] accesses to SMALL_SIZE2BIN(...) macro calls, and use a couple of cheap math operations to allow compacting the table by 4X or 8X, on 32- and 64-bit systems, respectively.
2011-03-07 14:56:36 +08:00
#if (LG_TINY_MIN == 2)
#define S2B_4(i) i,
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
#define S2B_8(i) S2B_4(i) S2B_4(i)
Reduce size of small_size2bin lookup table. Convert all direct small_size2bin[...] accesses to SMALL_SIZE2BIN(...) macro calls, and use a couple of cheap math operations to allow compacting the table by 4X or 8X, on 32- and 64-bit systems, respectively.
2011-03-07 14:56:36 +08:00
#elif (LG_TINY_MIN == 3)
#define S2B_8(i) i,
#else
# error "Unsupported LG_TINY_MIN"
#endif
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
#define S2B_16(i) S2B_8(i) S2B_8(i)
#define S2B_32(i) S2B_16(i) S2B_16(i)
#define S2B_64(i) S2B_32(i) S2B_32(i)
#define S2B_128(i) S2B_64(i) S2B_64(i)
#define S2B_256(i) S2B_128(i) S2B_128(i)
/*
Reduce size of small_size2bin lookup table. Convert all direct small_size2bin[...] accesses to SMALL_SIZE2BIN(...) macro calls, and use a couple of cheap math operations to allow compacting the table by 4X or 8X, on 32- and 64-bit systems, respectively.
2011-03-07 14:56:36 +08:00
* The number of elements in const_small_size2bin is dependent on the
* definition for SUBPAGE.
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
*/
Reduce size of small_size2bin lookup table. Convert all direct small_size2bin[...] accesses to SMALL_SIZE2BIN(...) macro calls, and use a couple of cheap math operations to allow compacting the table by 4X or 8X, on 32- and 64-bit systems, respectively.
2011-03-07 14:56:36 +08:00
static JEMALLOC_ATTR(aligned(CACHELINE))
const uint8_t const_small_size2bin[] = {
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
#if (LG_QUANTUM == 4)
Simplify tcache object caching. Use chains of cached objects, rather than using arrays of pointers. Since tcache_bin_t is no longer dynamically sized, convert tcache_t's tbin to an array of structures, rather than an array of pointers. This implicitly removes tcache_bin_{create,destroy}(), which further simplifies the fast path for malloc/free. Use cacheline alignment for tcache_t allocations. Remove runtime configuration option for number of tcache bin slots, and replace it with a boolean option for enabling/disabling tcache. Limit the number of tcache objects to the lesser of TCACHE_NSLOTS_MAX and 2X the number of regions per run for the size class. For GC-triggered flush, discard 3/4 of the objects below the low water mark, rather than 1/2.
2010-03-08 07:34:14 +08:00
/* 16-byte quantum **********************/
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
# ifdef JEMALLOC_TINY
Simplify small object allocation/deallocation. Use chained run free lists instead of bitmaps to track free objects within small runs. Remove reference counting for small object run pages.
2010-03-14 05:41:58 +08:00
# if (LG_TINY_MIN == 2)
Simplify tcache object caching. Use chains of cached objects, rather than using arrays of pointers. Since tcache_bin_t is no longer dynamically sized, convert tcache_t's tbin to an array of structures, rather than an array of pointers. This implicitly removes tcache_bin_{create,destroy}(), which further simplifies the fast path for malloc/free. Use cacheline alignment for tcache_t allocations. Remove runtime configuration option for number of tcache bin slots, and replace it with a boolean option for enabling/disabling tcache. Limit the number of tcache objects to the lesser of TCACHE_NSLOTS_MAX and 2X the number of regions per run for the size class. For GC-triggered flush, discard 3/4 of the objects below the low water mark, rather than 1/2.
2010-03-08 07:34:14 +08:00
S2B_4(0) /* 4 */
S2B_4(1) /* 8 */
S2B_8(2) /* 16 */
Simplify small object allocation/deallocation. Use chained run free lists instead of bitmaps to track free objects within small runs. Remove reference counting for small object run pages.
2010-03-14 05:41:58 +08:00
# define S2B_QMIN 2
Simplify tcache object caching. Use chains of cached objects, rather than using arrays of pointers. Since tcache_bin_t is no longer dynamically sized, convert tcache_t's tbin to an array of structures, rather than an array of pointers. This implicitly removes tcache_bin_{create,destroy}(), which further simplifies the fast path for malloc/free. Use cacheline alignment for tcache_t allocations. Remove runtime configuration option for number of tcache bin slots, and replace it with a boolean option for enabling/disabling tcache. Limit the number of tcache objects to the lesser of TCACHE_NSLOTS_MAX and 2X the number of regions per run for the size class. For GC-triggered flush, discard 3/4 of the objects below the low water mark, rather than 1/2.
2010-03-08 07:34:14 +08:00
# elif (LG_TINY_MIN == 3)
S2B_8(0) /* 8 */
S2B_8(1) /* 16 */
Simplify small object allocation/deallocation. Use chained run free lists instead of bitmaps to track free objects within small runs. Remove reference counting for small object run pages.
2010-03-14 05:41:58 +08:00
# define S2B_QMIN 1
Simplify tcache object caching. Use chains of cached objects, rather than using arrays of pointers. Since tcache_bin_t is no longer dynamically sized, convert tcache_t's tbin to an array of structures, rather than an array of pointers. This implicitly removes tcache_bin_{create,destroy}(), which further simplifies the fast path for malloc/free. Use cacheline alignment for tcache_t allocations. Remove runtime configuration option for number of tcache bin slots, and replace it with a boolean option for enabling/disabling tcache. Limit the number of tcache objects to the lesser of TCACHE_NSLOTS_MAX and 2X the number of regions per run for the size class. For GC-triggered flush, discard 3/4 of the objects below the low water mark, rather than 1/2.
2010-03-08 07:34:14 +08:00
# else
# error "Unsupported LG_TINY_MIN"
# endif
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
# else
S2B_16(0) /* 16 */
# define S2B_QMIN 0
# endif
S2B_16(S2B_QMIN + 1) /* 32 */
S2B_16(S2B_QMIN + 2) /* 48 */
S2B_16(S2B_QMIN + 3) /* 64 */
S2B_16(S2B_QMIN + 4) /* 80 */
S2B_16(S2B_QMIN + 5) /* 96 */
S2B_16(S2B_QMIN + 6) /* 112 */
S2B_16(S2B_QMIN + 7) /* 128 */
# define S2B_CMIN (S2B_QMIN + 8)
#else
Simplify tcache object caching. Use chains of cached objects, rather than using arrays of pointers. Since tcache_bin_t is no longer dynamically sized, convert tcache_t's tbin to an array of structures, rather than an array of pointers. This implicitly removes tcache_bin_{create,destroy}(), which further simplifies the fast path for malloc/free. Use cacheline alignment for tcache_t allocations. Remove runtime configuration option for number of tcache bin slots, and replace it with a boolean option for enabling/disabling tcache. Limit the number of tcache objects to the lesser of TCACHE_NSLOTS_MAX and 2X the number of regions per run for the size class. For GC-triggered flush, discard 3/4 of the objects below the low water mark, rather than 1/2.
2010-03-08 07:34:14 +08:00
/* 8-byte quantum ***********************/
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
# ifdef JEMALLOC_TINY
Simplify small object allocation/deallocation. Use chained run free lists instead of bitmaps to track free objects within small runs. Remove reference counting for small object run pages.
2010-03-14 05:41:58 +08:00
# if (LG_TINY_MIN == 2)
Simplify tcache object caching. Use chains of cached objects, rather than using arrays of pointers. Since tcache_bin_t is no longer dynamically sized, convert tcache_t's tbin to an array of structures, rather than an array of pointers. This implicitly removes tcache_bin_{create,destroy}(), which further simplifies the fast path for malloc/free. Use cacheline alignment for tcache_t allocations. Remove runtime configuration option for number of tcache bin slots, and replace it with a boolean option for enabling/disabling tcache. Limit the number of tcache objects to the lesser of TCACHE_NSLOTS_MAX and 2X the number of regions per run for the size class. For GC-triggered flush, discard 3/4 of the objects below the low water mark, rather than 1/2.
2010-03-08 07:34:14 +08:00
S2B_4(0) /* 4 */
S2B_4(1) /* 8 */
Simplify small object allocation/deallocation. Use chained run free lists instead of bitmaps to track free objects within small runs. Remove reference counting for small object run pages.
2010-03-14 05:41:58 +08:00
# define S2B_QMIN 1
Simplify tcache object caching. Use chains of cached objects, rather than using arrays of pointers. Since tcache_bin_t is no longer dynamically sized, convert tcache_t's tbin to an array of structures, rather than an array of pointers. This implicitly removes tcache_bin_{create,destroy}(), which further simplifies the fast path for malloc/free. Use cacheline alignment for tcache_t allocations. Remove runtime configuration option for number of tcache bin slots, and replace it with a boolean option for enabling/disabling tcache. Limit the number of tcache objects to the lesser of TCACHE_NSLOTS_MAX and 2X the number of regions per run for the size class. For GC-triggered flush, discard 3/4 of the objects below the low water mark, rather than 1/2.
2010-03-08 07:34:14 +08:00
# else
# error "Unsupported LG_TINY_MIN"
# endif
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
# else
S2B_8(0) /* 8 */
# define S2B_QMIN 0
# endif
S2B_8(S2B_QMIN + 1) /* 16 */
S2B_8(S2B_QMIN + 2) /* 24 */
S2B_8(S2B_QMIN + 3) /* 32 */
S2B_8(S2B_QMIN + 4) /* 40 */
S2B_8(S2B_QMIN + 5) /* 48 */
S2B_8(S2B_QMIN + 6) /* 56 */
S2B_8(S2B_QMIN + 7) /* 64 */
S2B_8(S2B_QMIN + 8) /* 72 */
S2B_8(S2B_QMIN + 9) /* 80 */
S2B_8(S2B_QMIN + 10) /* 88 */
S2B_8(S2B_QMIN + 11) /* 96 */
S2B_8(S2B_QMIN + 12) /* 104 */
S2B_8(S2B_QMIN + 13) /* 112 */
S2B_8(S2B_QMIN + 14) /* 120 */
S2B_8(S2B_QMIN + 15) /* 128 */
# define S2B_CMIN (S2B_QMIN + 16)
#endif
/****************************************/
S2B_64(S2B_CMIN + 0) /* 192 */
S2B_64(S2B_CMIN + 1) /* 256 */
S2B_64(S2B_CMIN + 2) /* 320 */
S2B_64(S2B_CMIN + 3) /* 384 */
S2B_64(S2B_CMIN + 4) /* 448 */
S2B_64(S2B_CMIN + 5) /* 512 */
# define S2B_SMIN (S2B_CMIN + 6)
S2B_256(S2B_SMIN + 0) /* 768 */
S2B_256(S2B_SMIN + 1) /* 1024 */
S2B_256(S2B_SMIN + 2) /* 1280 */
S2B_256(S2B_SMIN + 3) /* 1536 */
S2B_256(S2B_SMIN + 4) /* 1792 */
S2B_256(S2B_SMIN + 5) /* 2048 */
S2B_256(S2B_SMIN + 6) /* 2304 */
S2B_256(S2B_SMIN + 7) /* 2560 */
S2B_256(S2B_SMIN + 8) /* 2816 */
S2B_256(S2B_SMIN + 9) /* 3072 */
S2B_256(S2B_SMIN + 10) /* 3328 */
S2B_256(S2B_SMIN + 11) /* 3584 */
S2B_256(S2B_SMIN + 12) /* 3840 */
#if (STATIC_PAGE_SHIFT == 13)
S2B_256(S2B_SMIN + 13) /* 4096 */
S2B_256(S2B_SMIN + 14) /* 4352 */
S2B_256(S2B_SMIN + 15) /* 4608 */
S2B_256(S2B_SMIN + 16) /* 4864 */
S2B_256(S2B_SMIN + 17) /* 5120 */
S2B_256(S2B_SMIN + 18) /* 5376 */
S2B_256(S2B_SMIN + 19) /* 5632 */
S2B_256(S2B_SMIN + 20) /* 5888 */
S2B_256(S2B_SMIN + 21) /* 6144 */
S2B_256(S2B_SMIN + 22) /* 6400 */
S2B_256(S2B_SMIN + 23) /* 6656 */
S2B_256(S2B_SMIN + 24) /* 6912 */
S2B_256(S2B_SMIN + 25) /* 7168 */
S2B_256(S2B_SMIN + 26) /* 7424 */
S2B_256(S2B_SMIN + 27) /* 7680 */
S2B_256(S2B_SMIN + 28) /* 7936 */
#endif
};
#undef S2B_1
#undef S2B_2
#undef S2B_4
#undef S2B_8
#undef S2B_16
#undef S2B_32
#undef S2B_64
#undef S2B_128
#undef S2B_256
#undef S2B_QMIN
#undef S2B_CMIN
#undef S2B_SMIN
/******************************************************************************/
/* Function prototypes for non-inline static functions. */
static void arena_run_split(arena_t *arena, arena_run_t *run, size_t size,
bool large, bool zero);
static arena_chunk_t *arena_chunk_alloc(arena_t *arena);
static void arena_chunk_dealloc(arena_t *arena, arena_chunk_t *chunk);
static arena_run_t *arena_run_alloc(arena_t *arena, size_t size, bool large,
bool zero);
Add the "arenas.purge" mallctl.
2010-10-01 07:55:08 +08:00
static void arena_purge(arena_t *arena, bool all);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
static void arena_run_dalloc(arena_t *arena, arena_run_t *run, bool dirty);
static void arena_run_trim_head(arena_t *arena, arena_chunk_t *chunk,
arena_run_t *run, size_t oldsize, size_t newsize);
static void arena_run_trim_tail(arena_t *arena, arena_chunk_t *chunk,
arena_run_t *run, size_t oldsize, size_t newsize, bool dirty);
static arena_run_t *arena_bin_nonfull_run_get(arena_t *arena, arena_bin_t *bin);
static void *arena_bin_malloc_hard(arena_t *arena, arena_bin_t *bin);
Fix arena bugs. Split arena_dissociate_bin_run() out of arena_dalloc_bin_run(), so that arena_bin_malloc_hard() can avoid dissociation when recovering from losing a race. This fixes a bug introduced by a recent attempted fix. Fix a regression in arena_ralloc_large_grow() that was introduced by recent fixes.
2010-10-18 15:04:44 +08:00
static void arena_dissociate_bin_run(arena_chunk_t *chunk, arena_run_t *run,
arena_bin_t *bin);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
static void arena_dalloc_bin_run(arena_t *arena, arena_chunk_t *chunk,
arena_run_t *run, arena_bin_t *bin);
Fix numerous arena bugs. In arena_ralloc_large_grow(), update the map element for the end of the newly grown run, rather than the interior map element that was the beginning of the appended run. This is a long-standing bug, and it had the potential to cause massive corruption, but triggering it required roughly the following sequence of events: 1) Large in-place growing realloc(), with left-over space in the run that followed the large object. 2) Allocation of the remainder run left over from (1). 3) Deallocation of the remainder run *before* deallocation of the large run, with unfortunate interior map state left over from previous run allocation/deallocation activity, such that one or more pages of allocated memory would be treated as part of the remainder run during run coalescing. In summary, this was a bad bug, but it was difficult to trigger. In arena_bin_malloc_hard(), if another thread wins the race to allocate a bin run, dispose of the spare run via arena_bin_lower_run() rather than arena_run_dalloc(), since the run has already been prepared for use as a bin run. This bug has existed since March 14, 2010: e00572b384c81bd2aba57fac32f7077a34388915 mmap()/munmap() without arena->lock or bin->lock. Fix bugs in arena_dalloc_bin_run(), arena_trim_head(), arena_trim_tail(), and arena_ralloc_large_grow() that could cause the CHUNK_MAP_UNZEROED map bit to become corrupted. These are all long-standing bugs, but the chances of them actually causing problems was much lower before the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion. Fix a large run statistics regression in arena_ralloc_large_grow() that was introduced on September 17, 2010: 8e3c3c61b5bb676a705450708e7e79698cdc9e0c Add {,r,s,d}allocm(). Add debug code to validate that supposedly pre-zeroed memory really is.
2010-10-18 08:51:37 +08:00
static void arena_bin_lower_run(arena_t *arena, arena_chunk_t *chunk,
arena_run_t *run, arena_bin_t *bin);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
static void arena_ralloc_large_shrink(arena_t *arena, arena_chunk_t *chunk,
Add {,r,s,d}allocm(). Add allocm(), rallocm(), sallocm(), and dallocm(), which are a functional superset of malloc(), calloc(), posix_memalign(), malloc_usable_size(), and free().
2010-09-18 06:46:18 +08:00
void *ptr, size_t oldsize, size_t size);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
static bool arena_ralloc_large_grow(arena_t *arena, arena_chunk_t *chunk,
Add {,r,s,d}allocm(). Add allocm(), rallocm(), sallocm(), and dallocm(), which are a functional superset of malloc(), calloc(), posix_memalign(), malloc_usable_size(), and free().
2010-09-18 06:46:18 +08:00
void *ptr, size_t oldsize, size_t size, size_t extra, bool zero);
static bool arena_ralloc_large(void *ptr, size_t oldsize, size_t size,
size_t extra, bool zero);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
static bool small_size2bin_init(void);
#ifdef JEMALLOC_DEBUG
static void small_size2bin_validate(void);
#endif
static bool small_size2bin_init_hard(void);
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
static size_t bin_info_run_size_calc(arena_bin_info_t *bin_info,
size_t min_run_size);
static bool bin_info_init(void);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
/******************************************************************************/
static inline int
arena_run_comp(arena_chunk_map_t *a, arena_chunk_map_t *b)
{
uintptr_t a_mapelm = (uintptr_t)a;
uintptr_t b_mapelm = (uintptr_t)b;
assert(a != NULL);
assert(b != NULL);
return ((a_mapelm > b_mapelm) - (a_mapelm < b_mapelm));
}
Rewrite red-black trees. Use left-leaning 2-3 red-black trees instead of left-leaning 2-3-4 red-black trees. This reduces maximum tree height from (3 lg n) to (2 lg n). Do lazy balance fixup, rather than transforming the tree during the down pass. This improves insert/remove speed by ~30%. Use callback-based iteration rather than macros.
2010-03-01 07:00:18 +08:00
/* Generate red-black tree functions. */
rb_gen(static JEMALLOC_ATTR(unused), arena_run_tree_, arena_run_tree_t,
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
arena_chunk_map_t, u.rb_link, arena_run_comp)
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
static inline int
arena_avail_comp(arena_chunk_map_t *a, arena_chunk_map_t *b)
{
int ret;
size_t a_size = a->bits & ~PAGE_MASK;
size_t b_size = b->bits & ~PAGE_MASK;
Reduce statistical heap sampling memory overhead. If the mean heap sampling interval is larger than one page, simulate sampled small objects with large objects. This allows profiling context pointers to be omitted for small objects. As a result, the memory overhead for sampling decreases as the sampling interval is increased. Fix a compilation error in the profiling code.
2010-04-01 07:45:04 +08:00
assert((a->bits & CHUNK_MAP_KEY) == CHUNK_MAP_KEY || (a->bits &
CHUNK_MAP_DIRTY) == (b->bits & CHUNK_MAP_DIRTY));
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
ret = (a_size > b_size) - (a_size < b_size);
if (ret == 0) {
uintptr_t a_mapelm, b_mapelm;
if ((a->bits & CHUNK_MAP_KEY) != CHUNK_MAP_KEY)
a_mapelm = (uintptr_t)a;
else {
/*
* Treat keys as though they are lower than anything
* else.
*/
a_mapelm = 0;
}
b_mapelm = (uintptr_t)b;
ret = (a_mapelm > b_mapelm) - (a_mapelm < b_mapelm);
}
return (ret);
}
Rewrite red-black trees. Use left-leaning 2-3 red-black trees instead of left-leaning 2-3-4 red-black trees. This reduces maximum tree height from (3 lg n) to (2 lg n). Do lazy balance fixup, rather than transforming the tree during the down pass. This improves insert/remove speed by ~30%. Use callback-based iteration rather than macros.
2010-03-01 07:00:18 +08:00
/* Generate red-black tree functions. */
rb_gen(static JEMALLOC_ATTR(unused), arena_avail_tree_, arena_avail_tree_t,
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
arena_chunk_map_t, u.rb_link, arena_avail_comp)
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
static inline void *
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
arena_run_reg_alloc(arena_run_t *run, arena_bin_info_t *bin_info)
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
{
void *ret;
Use bitmaps to track small regions. The previous free list implementation, which embedded singly linked lists in available regions, had the unfortunate side effect of causing many cache misses during thread cache fills. Fix this in two places: - arena_run_t: Use a new bitmap implementation to track which regions are available. Furthermore, revert to preferring the lowest available region (as jemalloc did with its old bitmap-based approach). - tcache_t: Move read-only tcache_bin_t metadata into tcache_bin_info_t, and add a contiguous array of pointers to tcache_t in order to track cached objects. This substantially increases the size of tcache_t, but results in much higher data locality for common tcache operations. As a side benefit, it is again possible to efficiently flush the least recently used cached objects, so this change changes flushing from MRU to LRU. The new bitmap implementation uses a multi-level summary approach to make finding the lowest available region very fast. In practice, bitmaps only have one or two levels, though the implementation is general enough to handle extremely large bitmaps, mainly so that large page sizes can still be entertained. Fix tcache_bin_flush_large() to always flush statistics, in the same way that tcache_bin_flush_small() was recently fixed. Use JEMALLOC_DEBUG rather than NDEBUG. Add dassert(), and use it for debug-only asserts.
2011-03-17 01:30:13 +08:00
unsigned regind;
bitmap_t *bitmap = (bitmap_t *)((uintptr_t)run +
(uintptr_t)bin_info->bitmap_offset);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
Use bitmaps to track small regions. The previous free list implementation, which embedded singly linked lists in available regions, had the unfortunate side effect of causing many cache misses during thread cache fills. Fix this in two places: - arena_run_t: Use a new bitmap implementation to track which regions are available. Furthermore, revert to preferring the lowest available region (as jemalloc did with its old bitmap-based approach). - tcache_t: Move read-only tcache_bin_t metadata into tcache_bin_info_t, and add a contiguous array of pointers to tcache_t in order to track cached objects. This substantially increases the size of tcache_t, but results in much higher data locality for common tcache operations. As a side benefit, it is again possible to efficiently flush the least recently used cached objects, so this change changes flushing from MRU to LRU. The new bitmap implementation uses a multi-level summary approach to make finding the lowest available region very fast. In practice, bitmaps only have one or two levels, though the implementation is general enough to handle extremely large bitmaps, mainly so that large page sizes can still be entertained. Fix tcache_bin_flush_large() to always flush statistics, in the same way that tcache_bin_flush_small() was recently fixed. Use JEMALLOC_DEBUG rather than NDEBUG. Add dassert(), and use it for debug-only asserts.
2011-03-17 01:30:13 +08:00
dassert(run->magic == ARENA_RUN_MAGIC);
Simplify small object allocation/deallocation. Use chained run free lists instead of bitmaps to track free objects within small runs. Remove reference counting for small object run pages.
2010-03-14 05:41:58 +08:00
assert(run->nfree > 0);
Use bitmaps to track small regions. The previous free list implementation, which embedded singly linked lists in available regions, had the unfortunate side effect of causing many cache misses during thread cache fills. Fix this in two places: - arena_run_t: Use a new bitmap implementation to track which regions are available. Furthermore, revert to preferring the lowest available region (as jemalloc did with its old bitmap-based approach). - tcache_t: Move read-only tcache_bin_t metadata into tcache_bin_info_t, and add a contiguous array of pointers to tcache_t in order to track cached objects. This substantially increases the size of tcache_t, but results in much higher data locality for common tcache operations. As a side benefit, it is again possible to efficiently flush the least recently used cached objects, so this change changes flushing from MRU to LRU. The new bitmap implementation uses a multi-level summary approach to make finding the lowest available region very fast. In practice, bitmaps only have one or two levels, though the implementation is general enough to handle extremely large bitmaps, mainly so that large page sizes can still be entertained. Fix tcache_bin_flush_large() to always flush statistics, in the same way that tcache_bin_flush_small() was recently fixed. Use JEMALLOC_DEBUG rather than NDEBUG. Add dassert(), and use it for debug-only asserts.
2011-03-17 01:30:13 +08:00
assert(bitmap_full(bitmap, &bin_info->bitmap_info) == false);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
Use bitmaps to track small regions. The previous free list implementation, which embedded singly linked lists in available regions, had the unfortunate side effect of causing many cache misses during thread cache fills. Fix this in two places: - arena_run_t: Use a new bitmap implementation to track which regions are available. Furthermore, revert to preferring the lowest available region (as jemalloc did with its old bitmap-based approach). - tcache_t: Move read-only tcache_bin_t metadata into tcache_bin_info_t, and add a contiguous array of pointers to tcache_t in order to track cached objects. This substantially increases the size of tcache_t, but results in much higher data locality for common tcache operations. As a side benefit, it is again possible to efficiently flush the least recently used cached objects, so this change changes flushing from MRU to LRU. The new bitmap implementation uses a multi-level summary approach to make finding the lowest available region very fast. In practice, bitmaps only have one or two levels, though the implementation is general enough to handle extremely large bitmaps, mainly so that large page sizes can still be entertained. Fix tcache_bin_flush_large() to always flush statistics, in the same way that tcache_bin_flush_small() was recently fixed. Use JEMALLOC_DEBUG rather than NDEBUG. Add dassert(), and use it for debug-only asserts.
2011-03-17 01:30:13 +08:00
regind = bitmap_sfu(bitmap, &bin_info->bitmap_info);
ret = (void *)((uintptr_t)run + (uintptr_t)bin_info->reg0_offset +
(uintptr_t)(bin_info->reg_size * regind));
Simplify small object allocation/deallocation. Use chained run free lists instead of bitmaps to track free objects within small runs. Remove reference counting for small object run pages.
2010-03-14 05:41:58 +08:00
run->nfree--;
Use bitmaps to track small regions. The previous free list implementation, which embedded singly linked lists in available regions, had the unfortunate side effect of causing many cache misses during thread cache fills. Fix this in two places: - arena_run_t: Use a new bitmap implementation to track which regions are available. Furthermore, revert to preferring the lowest available region (as jemalloc did with its old bitmap-based approach). - tcache_t: Move read-only tcache_bin_t metadata into tcache_bin_info_t, and add a contiguous array of pointers to tcache_t in order to track cached objects. This substantially increases the size of tcache_t, but results in much higher data locality for common tcache operations. As a side benefit, it is again possible to efficiently flush the least recently used cached objects, so this change changes flushing from MRU to LRU. The new bitmap implementation uses a multi-level summary approach to make finding the lowest available region very fast. In practice, bitmaps only have one or two levels, though the implementation is general enough to handle extremely large bitmaps, mainly so that large page sizes can still be entertained. Fix tcache_bin_flush_large() to always flush statistics, in the same way that tcache_bin_flush_small() was recently fixed. Use JEMALLOC_DEBUG rather than NDEBUG. Add dassert(), and use it for debug-only asserts.
2011-03-17 01:30:13 +08:00
if (regind == run->nextind)
run->nextind++;
assert(regind < run->nextind);
Simplify small object allocation/deallocation. Use chained run free lists instead of bitmaps to track free objects within small runs. Remove reference counting for small object run pages.
2010-03-14 05:41:58 +08:00
return (ret);
Implement allocation profiling and leack checking. Add the --enable-prof and --enable-prof-libunwind configure options. Add the B/b, F/f, I/i, L/l, and U/u JEMALLOC_OPTIONS. Interval-based profile dump triggering is not yet implemented. Add supporting generic code: * Add memory barriers. * Add prn (LCG PRNG). * Add hash (Murmur hash function). * Add ckh (cuckoo hash tables).
2010-02-11 02:37:56 +08:00
}
static inline void
Simplify small object allocation/deallocation. Use chained run free lists instead of bitmaps to track free objects within small runs. Remove reference counting for small object run pages.
2010-03-14 05:41:58 +08:00
arena_run_reg_dalloc(arena_run_t *run, void *ptr)
Implement allocation profiling and leack checking. Add the --enable-prof and --enable-prof-libunwind configure options. Add the B/b, F/f, I/i, L/l, and U/u JEMALLOC_OPTIONS. Interval-based profile dump triggering is not yet implemented. Add supporting generic code: * Add memory barriers. * Add prn (LCG PRNG). * Add hash (Murmur hash function). * Add ckh (cuckoo hash tables).
2010-02-11 02:37:56 +08:00
{
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
arena_chunk_t *chunk = (arena_chunk_t *)CHUNK_ADDR2BASE(run);
size_t binind = arena_bin_index(chunk->arena, run->bin);
arena_bin_info_t *bin_info = &arena_bin_info[binind];
Use bitmaps to track small regions. The previous free list implementation, which embedded singly linked lists in available regions, had the unfortunate side effect of causing many cache misses during thread cache fills. Fix this in two places: - arena_run_t: Use a new bitmap implementation to track which regions are available. Furthermore, revert to preferring the lowest available region (as jemalloc did with its old bitmap-based approach). - tcache_t: Move read-only tcache_bin_t metadata into tcache_bin_info_t, and add a contiguous array of pointers to tcache_t in order to track cached objects. This substantially increases the size of tcache_t, but results in much higher data locality for common tcache operations. As a side benefit, it is again possible to efficiently flush the least recently used cached objects, so this change changes flushing from MRU to LRU. The new bitmap implementation uses a multi-level summary approach to make finding the lowest available region very fast. In practice, bitmaps only have one or two levels, though the implementation is general enough to handle extremely large bitmaps, mainly so that large page sizes can still be entertained. Fix tcache_bin_flush_large() to always flush statistics, in the same way that tcache_bin_flush_small() was recently fixed. Use JEMALLOC_DEBUG rather than NDEBUG. Add dassert(), and use it for debug-only asserts.
2011-03-17 01:30:13 +08:00
unsigned regind = arena_run_regind(run, bin_info, ptr);
bitmap_t *bitmap = (bitmap_t *)((uintptr_t)run +
(uintptr_t)bin_info->bitmap_offset);
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
assert(run->nfree < bin_info->nregs);
Simplify small object allocation/deallocation. Use chained run free lists instead of bitmaps to track free objects within small runs. Remove reference counting for small object run pages.
2010-03-14 05:41:58 +08:00
/* Freeing an interior pointer can cause assertion failure. */
assert(((uintptr_t)ptr - ((uintptr_t)run +
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
(uintptr_t)bin_info->reg0_offset)) % (uintptr_t)bin_info->reg_size
Simplify small object allocation/deallocation. Use chained run free lists instead of bitmaps to track free objects within small runs. Remove reference counting for small object run pages.
2010-03-14 05:41:58 +08:00
== 0);
Fix a bug in arena_dalloc_bin_run(). Fix the newsize argument to arena_run_trim_tail() that arena_dalloc_bin_run() passes. Previously, oldsize-newsize (i.e. the complement) was passed, which could erroneously cause dirty pages to be returned to the clean available runs tree. Prior to the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion, this bug merely caused dirty pages to be unaccounted for (and therefore never get purged), but with CHUNK_MAP_UNZEROED, this could cause dirty pages to be treated as zeroed (i.e. memory corruption).
2010-10-19 08:45:40 +08:00
assert((uintptr_t)ptr >= (uintptr_t)run +
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
(uintptr_t)bin_info->reg0_offset);
Use bitmaps to track small regions. The previous free list implementation, which embedded singly linked lists in available regions, had the unfortunate side effect of causing many cache misses during thread cache fills. Fix this in two places: - arena_run_t: Use a new bitmap implementation to track which regions are available. Furthermore, revert to preferring the lowest available region (as jemalloc did with its old bitmap-based approach). - tcache_t: Move read-only tcache_bin_t metadata into tcache_bin_info_t, and add a contiguous array of pointers to tcache_t in order to track cached objects. This substantially increases the size of tcache_t, but results in much higher data locality for common tcache operations. As a side benefit, it is again possible to efficiently flush the least recently used cached objects, so this change changes flushing from MRU to LRU. The new bitmap implementation uses a multi-level summary approach to make finding the lowest available region very fast. In practice, bitmaps only have one or two levels, though the implementation is general enough to handle extremely large bitmaps, mainly so that large page sizes can still be entertained. Fix tcache_bin_flush_large() to always flush statistics, in the same way that tcache_bin_flush_small() was recently fixed. Use JEMALLOC_DEBUG rather than NDEBUG. Add dassert(), and use it for debug-only asserts.
2011-03-17 01:30:13 +08:00
/* Freeing an unallocated pointer can cause assertion failure. */
assert(bitmap_get(bitmap, &bin_info->bitmap_info, regind));
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
Use bitmaps to track small regions. The previous free list implementation, which embedded singly linked lists in available regions, had the unfortunate side effect of causing many cache misses during thread cache fills. Fix this in two places: - arena_run_t: Use a new bitmap implementation to track which regions are available. Furthermore, revert to preferring the lowest available region (as jemalloc did with its old bitmap-based approach). - tcache_t: Move read-only tcache_bin_t metadata into tcache_bin_info_t, and add a contiguous array of pointers to tcache_t in order to track cached objects. This substantially increases the size of tcache_t, but results in much higher data locality for common tcache operations. As a side benefit, it is again possible to efficiently flush the least recently used cached objects, so this change changes flushing from MRU to LRU. The new bitmap implementation uses a multi-level summary approach to make finding the lowest available region very fast. In practice, bitmaps only have one or two levels, though the implementation is general enough to handle extremely large bitmaps, mainly so that large page sizes can still be entertained. Fix tcache_bin_flush_large() to always flush statistics, in the same way that tcache_bin_flush_small() was recently fixed. Use JEMALLOC_DEBUG rather than NDEBUG. Add dassert(), and use it for debug-only asserts.
2011-03-17 01:30:13 +08:00
bitmap_unset(bitmap, &bin_info->bitmap_info, regind);
Simplify small object allocation/deallocation. Use chained run free lists instead of bitmaps to track free objects within small runs. Remove reference counting for small object run pages.
2010-03-14 05:41:58 +08:00
run->nfree++;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
Fix a bug in arena_dalloc_bin_run(). Fix the newsize argument to arena_run_trim_tail() that arena_dalloc_bin_run() passes. Previously, oldsize-newsize (i.e. the complement) was passed, which could erroneously cause dirty pages to be returned to the clean available runs tree. Prior to the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion, this bug merely caused dirty pages to be unaccounted for (and therefore never get purged), but with CHUNK_MAP_UNZEROED, this could cause dirty pages to be treated as zeroed (i.e. memory corruption).
2010-10-19 08:45:40 +08:00
#ifdef JEMALLOC_DEBUG
static inline void
arena_chunk_validate_zeroed(arena_chunk_t *chunk, size_t run_ind)
{
Fix compilation error. Don't declare loop variable inside for (...) clause.
2010-10-25 11:08:37 +08:00
size_t i;
Fix a bug in arena_dalloc_bin_run(). Fix the newsize argument to arena_run_trim_tail() that arena_dalloc_bin_run() passes. Previously, oldsize-newsize (i.e. the complement) was passed, which could erroneously cause dirty pages to be returned to the clean available runs tree. Prior to the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion, this bug merely caused dirty pages to be unaccounted for (and therefore never get purged), but with CHUNK_MAP_UNZEROED, this could cause dirty pages to be treated as zeroed (i.e. memory corruption).
2010-10-19 08:45:40 +08:00
size_t *p = (size_t *)((uintptr_t)chunk + (run_ind << PAGE_SHIFT));
Fix compilation error. Don't declare loop variable inside for (...) clause.
2010-10-25 11:08:37 +08:00
for (i = 0; i < PAGE_SIZE / sizeof(size_t); i++)
Fix a bug in arena_dalloc_bin_run(). Fix the newsize argument to arena_run_trim_tail() that arena_dalloc_bin_run() passes. Previously, oldsize-newsize (i.e. the complement) was passed, which could erroneously cause dirty pages to be returned to the clean available runs tree. Prior to the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion, this bug merely caused dirty pages to be unaccounted for (and therefore never get purged), but with CHUNK_MAP_UNZEROED, this could cause dirty pages to be treated as zeroed (i.e. memory corruption).
2010-10-19 08:45:40 +08:00
assert(p[i] == 0);
}
#endif
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
static void
arena_run_split(arena_t *arena, arena_run_t *run, size_t size, bool large,
bool zero)
{
arena_chunk_t *chunk;
size_t old_ndirty, run_ind, total_pages, need_pages, rem_pages, i;
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
size_t flag_dirty;
arena_avail_tree_t *runs_avail;
Add the "stats.cactive" mallctl. Add the "stats.cactive" mallctl, which can be used to efficiently and repeatedly query approximately how much active memory the application is utilizing.
2011-03-19 08:56:14 +08:00
#ifdef JEMALLOC_STATS
size_t cactive_diff;
#endif
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
chunk = (arena_chunk_t *)CHUNK_ADDR2BASE(run);
old_ndirty = chunk->ndirty;
run_ind = (unsigned)(((uintptr_t)run - (uintptr_t)chunk)
>> PAGE_SHIFT);
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
flag_dirty = chunk->map[run_ind-map_bias].bits & CHUNK_MAP_DIRTY;
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
runs_avail = (flag_dirty != 0) ? &arena->runs_avail_dirty :
&arena->runs_avail_clean;
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
total_pages = (chunk->map[run_ind-map_bias].bits & ~PAGE_MASK) >>
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
PAGE_SHIFT;
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
assert((chunk->map[run_ind+total_pages-1-map_bias].bits &
CHUNK_MAP_DIRTY) == flag_dirty);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
need_pages = (size >> PAGE_SHIFT);
assert(need_pages > 0);
assert(need_pages <= total_pages);
rem_pages = total_pages - need_pages;
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
arena_avail_tree_remove(runs_avail, &chunk->map[run_ind-map_bias]);
Add the "stats.cactive" mallctl. Add the "stats.cactive" mallctl, which can be used to efficiently and repeatedly query approximately how much active memory the application is utilizing.
2011-03-19 08:56:14 +08:00
#ifdef JEMALLOC_STATS
/* Update stats_cactive if nactive is crossing a chunk multiple. */
cactive_diff = CHUNK_CEILING((arena->nactive + need_pages) <<
PAGE_SHIFT) - CHUNK_CEILING(arena->nactive << PAGE_SHIFT);
if (cactive_diff != 0)
stats_cactive_add(cactive_diff);
#endif
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
arena->nactive += need_pages;
/* Keep track of trailing unused pages for later use. */
if (rem_pages > 0) {
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
if (flag_dirty != 0) {
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
chunk->map[run_ind+need_pages-map_bias].bits =
(rem_pages << PAGE_SHIFT) | CHUNK_MAP_DIRTY;
chunk->map[run_ind+total_pages-1-map_bias].bits =
(rem_pages << PAGE_SHIFT) | CHUNK_MAP_DIRTY;
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
} else {
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
chunk->map[run_ind+need_pages-map_bias].bits =
(rem_pages << PAGE_SHIFT) |
(chunk->map[run_ind+need_pages-map_bias].bits &
Change CHUNK_MAP_ZEROED to CHUNK_MAP_UNZEROED. Invert the chunk map bit that tracks whether a page is zeroed, so that for zeroed arena chunks, the interior of the page map does not need to be initialized (as it consists entirely of zero bytes).
2010-10-02 08:53:37 +08:00
CHUNK_MAP_UNZEROED);
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
chunk->map[run_ind+total_pages-1-map_bias].bits =
(rem_pages << PAGE_SHIFT) |
(chunk->map[run_ind+total_pages-1-map_bias].bits &
Change CHUNK_MAP_ZEROED to CHUNK_MAP_UNZEROED. Invert the chunk map bit that tracks whether a page is zeroed, so that for zeroed arena chunks, the interior of the page map does not need to be initialized (as it consists entirely of zero bytes).
2010-10-02 08:53:37 +08:00
CHUNK_MAP_UNZEROED);
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
}
arena_avail_tree_insert(runs_avail,
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
&chunk->map[run_ind+need_pages-map_bias]);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
/* Update dirty page accounting. */
if (flag_dirty != 0) {
chunk->ndirty -= need_pages;
arena->ndirty -= need_pages;
}
/*
* Update the page map separately for large vs. small runs, since it is
* possible to avoid iteration for large mallocs.
*/
if (large) {
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
if (zero) {
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
if (flag_dirty == 0) {
/*
* The run is clean, so some pages may be
* zeroed (i.e. never before touched).
*/
for (i = 0; i < need_pages; i++) {
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
if ((chunk->map[run_ind+i-map_bias].bits
Change CHUNK_MAP_ZEROED to CHUNK_MAP_UNZEROED. Invert the chunk map bit that tracks whether a page is zeroed, so that for zeroed arena chunks, the interior of the page map does not need to be initialized (as it consists entirely of zero bytes).
2010-10-02 08:53:37 +08:00
& CHUNK_MAP_UNZEROED) != 0) {
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
memset((void *)((uintptr_t)
Fix a bug in arena_dalloc_bin_run(). Fix the newsize argument to arena_run_trim_tail() that arena_dalloc_bin_run() passes. Previously, oldsize-newsize (i.e. the complement) was passed, which could erroneously cause dirty pages to be returned to the clean available runs tree. Prior to the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion, this bug merely caused dirty pages to be unaccounted for (and therefore never get purged), but with CHUNK_MAP_UNZEROED, this could cause dirty pages to be treated as zeroed (i.e. memory corruption).
2010-10-19 08:45:40 +08:00
chunk + ((run_ind+i) <<
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
PAGE_SHIFT)), 0,
PAGE_SIZE);
}
Fix numerous arena bugs. In arena_ralloc_large_grow(), update the map element for the end of the newly grown run, rather than the interior map element that was the beginning of the appended run. This is a long-standing bug, and it had the potential to cause massive corruption, but triggering it required roughly the following sequence of events: 1) Large in-place growing realloc(), with left-over space in the run that followed the large object. 2) Allocation of the remainder run left over from (1). 3) Deallocation of the remainder run *before* deallocation of the large run, with unfortunate interior map state left over from previous run allocation/deallocation activity, such that one or more pages of allocated memory would be treated as part of the remainder run during run coalescing. In summary, this was a bad bug, but it was difficult to trigger. In arena_bin_malloc_hard(), if another thread wins the race to allocate a bin run, dispose of the spare run via arena_bin_lower_run() rather than arena_run_dalloc(), since the run has already been prepared for use as a bin run. This bug has existed since March 14, 2010: e00572b384c81bd2aba57fac32f7077a34388915 mmap()/munmap() without arena->lock or bin->lock. Fix bugs in arena_dalloc_bin_run(), arena_trim_head(), arena_trim_tail(), and arena_ralloc_large_grow() that could cause the CHUNK_MAP_UNZEROED map bit to become corrupted. These are all long-standing bugs, but the chances of them actually causing problems was much lower before the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion. Fix a large run statistics regression in arena_ralloc_large_grow() that was introduced on September 17, 2010: 8e3c3c61b5bb676a705450708e7e79698cdc9e0c Add {,r,s,d}allocm(). Add debug code to validate that supposedly pre-zeroed memory really is.
2010-10-18 08:51:37 +08:00
#ifdef JEMALLOC_DEBUG
else {
Fix a bug in arena_dalloc_bin_run(). Fix the newsize argument to arena_run_trim_tail() that arena_dalloc_bin_run() passes. Previously, oldsize-newsize (i.e. the complement) was passed, which could erroneously cause dirty pages to be returned to the clean available runs tree. Prior to the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion, this bug merely caused dirty pages to be unaccounted for (and therefore never get purged), but with CHUNK_MAP_UNZEROED, this could cause dirty pages to be treated as zeroed (i.e. memory corruption).
2010-10-19 08:45:40 +08:00
arena_chunk_validate_zeroed(
chunk, run_ind+i);
Fix numerous arena bugs. In arena_ralloc_large_grow(), update the map element for the end of the newly grown run, rather than the interior map element that was the beginning of the appended run. This is a long-standing bug, and it had the potential to cause massive corruption, but triggering it required roughly the following sequence of events: 1) Large in-place growing realloc(), with left-over space in the run that followed the large object. 2) Allocation of the remainder run left over from (1). 3) Deallocation of the remainder run *before* deallocation of the large run, with unfortunate interior map state left over from previous run allocation/deallocation activity, such that one or more pages of allocated memory would be treated as part of the remainder run during run coalescing. In summary, this was a bad bug, but it was difficult to trigger. In arena_bin_malloc_hard(), if another thread wins the race to allocate a bin run, dispose of the spare run via arena_bin_lower_run() rather than arena_run_dalloc(), since the run has already been prepared for use as a bin run. This bug has existed since March 14, 2010: e00572b384c81bd2aba57fac32f7077a34388915 mmap()/munmap() without arena->lock or bin->lock. Fix bugs in arena_dalloc_bin_run(), arena_trim_head(), arena_trim_tail(), and arena_ralloc_large_grow() that could cause the CHUNK_MAP_UNZEROED map bit to become corrupted. These are all long-standing bugs, but the chances of them actually causing problems was much lower before the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion. Fix a large run statistics regression in arena_ralloc_large_grow() that was introduced on September 17, 2010: 8e3c3c61b5bb676a705450708e7e79698cdc9e0c Add {,r,s,d}allocm(). Add debug code to validate that supposedly pre-zeroed memory really is.
2010-10-18 08:51:37 +08:00
}
#endif
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
}
} else {
/*
* The run is dirty, so all pages must be
* zeroed.
*/
memset((void *)((uintptr_t)chunk + (run_ind <<
PAGE_SHIFT)), 0, (need_pages <<
PAGE_SHIFT));
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
}
/*
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
* Set the last element first, in case the run only contains one
* page (i.e. both statements set the same element).
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
*/
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
chunk->map[run_ind+need_pages-1-map_bias].bits =
CHUNK_MAP_LARGE | CHUNK_MAP_ALLOCATED | flag_dirty;
Fix heap profiling bugs. Fix a regression due to the recent heap profiling accuracy improvements: prof_{m,re}alloc() must set the object's profiling context regardless of whether it is sampled. Fix management of the CHUNK_MAP_CLASS chunk map bits, such that all large object (re-)allocation paths correctly initialize the bits. Prior to this fix, in-place realloc() cleared the bits, resulting in incorrect reported object size from arena_salloc_demote(). After this fix the non-demoted bit pattern is all zeros (instead of all ones), which makes it easier to assure that the bits are properly set.
2010-10-23 01:45:59 +08:00
chunk->map[run_ind-map_bias].bits = size | flag_dirty |
CHUNK_MAP_LARGE | CHUNK_MAP_ALLOCATED;
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
} else {
assert(zero == false);
/*
Fix numerous arena bugs. In arena_ralloc_large_grow(), update the map element for the end of the newly grown run, rather than the interior map element that was the beginning of the appended run. This is a long-standing bug, and it had the potential to cause massive corruption, but triggering it required roughly the following sequence of events: 1) Large in-place growing realloc(), with left-over space in the run that followed the large object. 2) Allocation of the remainder run left over from (1). 3) Deallocation of the remainder run *before* deallocation of the large run, with unfortunate interior map state left over from previous run allocation/deallocation activity, such that one or more pages of allocated memory would be treated as part of the remainder run during run coalescing. In summary, this was a bad bug, but it was difficult to trigger. In arena_bin_malloc_hard(), if another thread wins the race to allocate a bin run, dispose of the spare run via arena_bin_lower_run() rather than arena_run_dalloc(), since the run has already been prepared for use as a bin run. This bug has existed since March 14, 2010: e00572b384c81bd2aba57fac32f7077a34388915 mmap()/munmap() without arena->lock or bin->lock. Fix bugs in arena_dalloc_bin_run(), arena_trim_head(), arena_trim_tail(), and arena_ralloc_large_grow() that could cause the CHUNK_MAP_UNZEROED map bit to become corrupted. These are all long-standing bugs, but the chances of them actually causing problems was much lower before the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion. Fix a large run statistics regression in arena_ralloc_large_grow() that was introduced on September 17, 2010: 8e3c3c61b5bb676a705450708e7e79698cdc9e0c Add {,r,s,d}allocm(). Add debug code to validate that supposedly pre-zeroed memory really is.
2010-10-18 08:51:37 +08:00
* Propagate the dirty and unzeroed flags to the allocated
* small run, so that arena_dalloc_bin_run() has the ability to
* conditionally trim clean pages.
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
*/
Preserve CHUNK_MAP_UNZEROED for small runs. Preserve CHUNK_MAP_UNZEROED when allocating small runs, because it is possible that untouched pages will be returned to the tree of clean runs, where the CHUNK_MAP_UNZEROED flag matters. Prior to the conversion from CHUNK_MAP_ZEROED, this was already a bug, but in the worst case extra zeroing occurred. After the conversion, this bug made it possible to incorrectly treat pages as pre-zeroed.
2010-10-17 07:10:40 +08:00
chunk->map[run_ind-map_bias].bits =
(chunk->map[run_ind-map_bias].bits & CHUNK_MAP_UNZEROED) |
CHUNK_MAP_ALLOCATED | flag_dirty;
Fix a bug in arena_dalloc_bin_run(). Fix the newsize argument to arena_run_trim_tail() that arena_dalloc_bin_run() passes. Previously, oldsize-newsize (i.e. the complement) was passed, which could erroneously cause dirty pages to be returned to the clean available runs tree. Prior to the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion, this bug merely caused dirty pages to be unaccounted for (and therefore never get purged), but with CHUNK_MAP_UNZEROED, this could cause dirty pages to be treated as zeroed (i.e. memory corruption).
2010-10-19 08:45:40 +08:00
#ifdef JEMALLOC_DEBUG
/*
* The first page will always be dirtied during small run
* initialization, so a validation failure here would not
* actually cause an observable failure.
*/
if (flag_dirty == 0 &&
(chunk->map[run_ind-map_bias].bits & CHUNK_MAP_UNZEROED)
== 0)
arena_chunk_validate_zeroed(chunk, run_ind);
#endif
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
for (i = 1; i < need_pages - 1; i++) {
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
chunk->map[run_ind+i-map_bias].bits = (i << PAGE_SHIFT)
Preserve CHUNK_MAP_UNZEROED for small runs. Preserve CHUNK_MAP_UNZEROED when allocating small runs, because it is possible that untouched pages will be returned to the tree of clean runs, where the CHUNK_MAP_UNZEROED flag matters. Prior to the conversion from CHUNK_MAP_ZEROED, this was already a bug, but in the worst case extra zeroing occurred. After the conversion, this bug made it possible to incorrectly treat pages as pre-zeroed.
2010-10-17 07:10:40 +08:00
| (chunk->map[run_ind+i-map_bias].bits &
CHUNK_MAP_UNZEROED) | CHUNK_MAP_ALLOCATED;
Fix a bug in arena_dalloc_bin_run(). Fix the newsize argument to arena_run_trim_tail() that arena_dalloc_bin_run() passes. Previously, oldsize-newsize (i.e. the complement) was passed, which could erroneously cause dirty pages to be returned to the clean available runs tree. Prior to the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion, this bug merely caused dirty pages to be unaccounted for (and therefore never get purged), but with CHUNK_MAP_UNZEROED, this could cause dirty pages to be treated as zeroed (i.e. memory corruption).
2010-10-19 08:45:40 +08:00
#ifdef JEMALLOC_DEBUG
if (flag_dirty == 0 &&
(chunk->map[run_ind+i-map_bias].bits &
CHUNK_MAP_UNZEROED) == 0)
arena_chunk_validate_zeroed(chunk, run_ind+i);
#endif
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
}
Fix a regression in CHUNK_MAP_UNZEROED change. Fix a regression added by revision: 3377ffa1f4f8e67bce1e36624285e5baf5f9ecef Change CHUNK_MAP_ZEROED to CHUNK_MAP_UNZEROED. A modified chunk->map dereference was missing the subtraction of map_bias, which caused incorrect chunk map initialization, as well as potential corruption of the first non-header page of memory within each chunk.
2010-10-14 15:28:31 +08:00
chunk->map[run_ind+need_pages-1-map_bias].bits = ((need_pages
Preserve CHUNK_MAP_UNZEROED for small runs. Preserve CHUNK_MAP_UNZEROED when allocating small runs, because it is possible that untouched pages will be returned to the tree of clean runs, where the CHUNK_MAP_UNZEROED flag matters. Prior to the conversion from CHUNK_MAP_ZEROED, this was already a bug, but in the worst case extra zeroing occurred. After the conversion, this bug made it possible to incorrectly treat pages as pre-zeroed.
2010-10-17 07:10:40 +08:00
- 1) << PAGE_SHIFT) |
(chunk->map[run_ind+need_pages-1-map_bias].bits &
CHUNK_MAP_UNZEROED) | CHUNK_MAP_ALLOCATED | flag_dirty;
Fix a bug in arena_dalloc_bin_run(). Fix the newsize argument to arena_run_trim_tail() that arena_dalloc_bin_run() passes. Previously, oldsize-newsize (i.e. the complement) was passed, which could erroneously cause dirty pages to be returned to the clean available runs tree. Prior to the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion, this bug merely caused dirty pages to be unaccounted for (and therefore never get purged), but with CHUNK_MAP_UNZEROED, this could cause dirty pages to be treated as zeroed (i.e. memory corruption).
2010-10-19 08:45:40 +08:00
#ifdef JEMALLOC_DEBUG
if (flag_dirty == 0 &&
(chunk->map[run_ind+need_pages-1-map_bias].bits &
CHUNK_MAP_UNZEROED) == 0) {
arena_chunk_validate_zeroed(chunk,
run_ind+need_pages-1);
}
#endif
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
}
static arena_chunk_t *
arena_chunk_alloc(arena_t *arena)
{
arena_chunk_t *chunk;
size_t i;
if (arena->spare != NULL) {
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
arena_avail_tree_t *runs_avail;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
chunk = arena->spare;
arena->spare = NULL;
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
/* Insert the run into the appropriate runs_avail_* tree. */
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
if ((chunk->map[0].bits & CHUNK_MAP_DIRTY) == 0)
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
runs_avail = &arena->runs_avail_clean;
else
runs_avail = &arena->runs_avail_dirty;
Fix arena bugs. Move part of arena_bin_lower_run() into the callers, since the conditions under which it should be called differ slightly between callers. Fix arena_chunk_purge() to omit run size in the last map entry for each run it temporarily allocates.
2010-10-18 11:57:30 +08:00
assert((chunk->map[0].bits & ~PAGE_MASK) == arena_maxclass);
assert((chunk->map[chunk_npages-1-map_bias].bits & ~PAGE_MASK)
== arena_maxclass);
assert((chunk->map[0].bits & CHUNK_MAP_DIRTY) ==
(chunk->map[chunk_npages-1-map_bias].bits &
CHUNK_MAP_DIRTY));
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
arena_avail_tree_insert(runs_avail, &chunk->map[0]);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
} else {
Modify chunk_alloc() to support optional zeroing. Use optional zeroing in arena_chunk_alloc() to avoid needless zeroing of chunks. This is particularly important in the context of swapfile and DSS allocation, since a long-lived application may commonly recycle chunks.
2010-01-25 09:13:07 +08:00
bool zero;
Change CHUNK_MAP_ZEROED to CHUNK_MAP_UNZEROED. Invert the chunk map bit that tracks whether a page is zeroed, so that for zeroed arena chunks, the interior of the page map does not need to be initialized (as it consists entirely of zero bytes).
2010-10-02 08:53:37 +08:00
size_t unzeroed;
Modify chunk_alloc() to support optional zeroing. Use optional zeroing in arena_chunk_alloc() to avoid needless zeroing of chunks. This is particularly important in the context of swapfile and DSS allocation, since a long-lived application may commonly recycle chunks.
2010-01-25 09:13:07 +08:00
zero = false;
mmap()/munmap() without arena->lock or bin->lock.
2010-03-15 10:43:56 +08:00
malloc_mutex_unlock(&arena->lock);
Port to Mac OS X. Add Mac OS X support, based in large part on the OS X support in Mozilla's version of jemalloc.
2010-09-06 01:35:13 +08:00
chunk = (arena_chunk_t *)chunk_alloc(chunksize, false, &zero);
mmap()/munmap() without arena->lock or bin->lock.
2010-03-15 10:43:56 +08:00
malloc_mutex_lock(&arena->lock);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
if (chunk == NULL)
return (NULL);
#ifdef JEMALLOC_STATS
arena->stats.mapped += chunksize;
#endif
chunk->arena = arena;
Modify dirty page purging algorithm. Convert chunks_dirty from a red-black tree to a doubly linked list, and use it to purge dirty pages from chunks in FIFO order. Add a lock around the code that purges dirty pages via madvise(2), in order to avoid kernel contention. If lock acquisition fails, indefinitely postpone purging dirty pages. Add a lower limit of one chunk worth of dirty pages per arena for purging, in addition to the active:dirty ratio. When purging, purge all dirty pages from at least one chunk, but rather than purging enough pages to drop to half the purging threshold, merely drop to the threshold.
2010-03-05 13:35:07 +08:00
ql_elm_new(chunk, link_dirty);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
chunk->dirtied = false;
/*
* Claim that no pages are in use, since the header is merely
* overhead.
*/
chunk->ndirty = 0;
/*
* Initialize the map to contain one maximal free untouched run.
Modify chunk_alloc() to support optional zeroing. Use optional zeroing in arena_chunk_alloc() to avoid needless zeroing of chunks. This is particularly important in the context of swapfile and DSS allocation, since a long-lived application may commonly recycle chunks.
2010-01-25 09:13:07 +08:00
* Mark the pages as zeroed iff chunk_alloc() returned a zeroed
* chunk.
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
*/
Change CHUNK_MAP_ZEROED to CHUNK_MAP_UNZEROED. Invert the chunk map bit that tracks whether a page is zeroed, so that for zeroed arena chunks, the interior of the page map does not need to be initialized (as it consists entirely of zero bytes).
2010-10-02 08:53:37 +08:00
unzeroed = zero ? 0 : CHUNK_MAP_UNZEROED;
chunk->map[0].bits = arena_maxclass | unzeroed;
/*
* There is no need to initialize the internal page map entries
* unless the chunk is not zeroed.
*/
if (zero == false) {
for (i = map_bias+1; i < chunk_npages-1; i++)
chunk->map[i-map_bias].bits = unzeroed;
}
Fix numerous arena bugs. In arena_ralloc_large_grow(), update the map element for the end of the newly grown run, rather than the interior map element that was the beginning of the appended run. This is a long-standing bug, and it had the potential to cause massive corruption, but triggering it required roughly the following sequence of events: 1) Large in-place growing realloc(), with left-over space in the run that followed the large object. 2) Allocation of the remainder run left over from (1). 3) Deallocation of the remainder run *before* deallocation of the large run, with unfortunate interior map state left over from previous run allocation/deallocation activity, such that one or more pages of allocated memory would be treated as part of the remainder run during run coalescing. In summary, this was a bad bug, but it was difficult to trigger. In arena_bin_malloc_hard(), if another thread wins the race to allocate a bin run, dispose of the spare run via arena_bin_lower_run() rather than arena_run_dalloc(), since the run has already been prepared for use as a bin run. This bug has existed since March 14, 2010: e00572b384c81bd2aba57fac32f7077a34388915 mmap()/munmap() without arena->lock or bin->lock. Fix bugs in arena_dalloc_bin_run(), arena_trim_head(), arena_trim_tail(), and arena_ralloc_large_grow() that could cause the CHUNK_MAP_UNZEROED map bit to become corrupted. These are all long-standing bugs, but the chances of them actually causing problems was much lower before the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion. Fix a large run statistics regression in arena_ralloc_large_grow() that was introduced on September 17, 2010: 8e3c3c61b5bb676a705450708e7e79698cdc9e0c Add {,r,s,d}allocm(). Add debug code to validate that supposedly pre-zeroed memory really is.
2010-10-18 08:51:37 +08:00
#ifdef JEMALLOC_DEBUG
else {
for (i = map_bias+1; i < chunk_npages-1; i++)
assert(chunk->map[i-map_bias].bits == unzeroed);
}
#endif
Fix a regression in CHUNK_MAP_UNZEROED change. Fix a regression added by revision: 3377ffa1f4f8e67bce1e36624285e5baf5f9ecef Change CHUNK_MAP_ZEROED to CHUNK_MAP_UNZEROED. A modified chunk->map dereference was missing the subtraction of map_bias, which caused incorrect chunk map initialization, as well as potential corruption of the first non-header page of memory within each chunk.
2010-10-14 15:28:31 +08:00
chunk->map[chunk_npages-1-map_bias].bits = arena_maxclass |
unzeroed;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
/* Insert the run into the runs_avail_clean tree. */
arena_avail_tree_insert(&arena->runs_avail_clean,
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
&chunk->map[0]);
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
}
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
return (chunk);
}
static void
arena_chunk_dealloc(arena_t *arena, arena_chunk_t *chunk)
{
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
arena_avail_tree_t *runs_avail;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
Fix arena chunk purge/dealloc race conditions. Fix arena_chunk_dealloc() to put the new spare in a consistent state before dropping the arena mutex to deallocate the previous spare. Fix arena_run_dalloc() to insert a newly dirtied chunk into the chunks_dirty list before potentially deallocating the chunk, so that dirty page accounting is self-consistent.
2010-04-14 11:53:21 +08:00
/*
* Remove run from the appropriate runs_avail_* tree, so that the arena
* does not use it.
*/
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
if ((chunk->map[0].bits & CHUNK_MAP_DIRTY) == 0)
Fix arena chunk purge/dealloc race conditions. Fix arena_chunk_dealloc() to put the new spare in a consistent state before dropping the arena mutex to deallocate the previous spare. Fix arena_run_dalloc() to insert a newly dirtied chunk into the chunks_dirty list before potentially deallocating the chunk, so that dirty page accounting is self-consistent.
2010-04-14 11:53:21 +08:00
runs_avail = &arena->runs_avail_clean;
else
runs_avail = &arena->runs_avail_dirty;
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
arena_avail_tree_remove(runs_avail, &chunk->map[0]);
Fix arena chunk purge/dealloc race conditions. Fix arena_chunk_dealloc() to put the new spare in a consistent state before dropping the arena mutex to deallocate the previous spare. Fix arena_run_dalloc() to insert a newly dirtied chunk into the chunks_dirty list before potentially deallocating the chunk, so that dirty page accounting is self-consistent.
2010-04-14 11:53:21 +08:00
if (arena->spare != NULL) {
mmap()/munmap() without arena->lock or bin->lock.
2010-03-15 10:43:56 +08:00
arena_chunk_t *spare = arena->spare;
Fix arena chunk purge/dealloc race conditions. Fix arena_chunk_dealloc() to put the new spare in a consistent state before dropping the arena mutex to deallocate the previous spare. Fix arena_run_dalloc() to insert a newly dirtied chunk into the chunks_dirty list before potentially deallocating the chunk, so that dirty page accounting is self-consistent.
2010-04-14 11:53:21 +08:00
arena->spare = chunk;
mmap()/munmap() without arena->lock or bin->lock.
2010-03-15 10:43:56 +08:00
if (spare->dirtied) {
ql_remove(&chunk->arena->chunks_dirty, spare,
Modify dirty page purging algorithm. Convert chunks_dirty from a red-black tree to a doubly linked list, and use it to purge dirty pages from chunks in FIFO order. Add a lock around the code that purges dirty pages via madvise(2), in order to avoid kernel contention. If lock acquisition fails, indefinitely postpone purging dirty pages. Add a lower limit of one chunk worth of dirty pages per arena for purging, in addition to the active:dirty ratio. When purging, purge all dirty pages from at least one chunk, but rather than purging enough pages to drop to half the purging threshold, merely drop to the threshold.
2010-03-05 13:35:07 +08:00
link_dirty);
mmap()/munmap() without arena->lock or bin->lock.
2010-03-15 10:43:56 +08:00
arena->ndirty -= spare->ndirty;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
mmap()/munmap() without arena->lock or bin->lock.
2010-03-15 10:43:56 +08:00
malloc_mutex_unlock(&arena->lock);
Fix huge_ralloc to maintain chunk statistics. Fix huge_ralloc() to properly maintain chunk statistics when using mremap(2).
2011-11-12 06:41:59 +08:00
chunk_dealloc((void *)spare, chunksize, true);
mmap()/munmap() without arena->lock or bin->lock.
2010-03-15 10:43:56 +08:00
malloc_mutex_lock(&arena->lock);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
#ifdef JEMALLOC_STATS
arena->stats.mapped -= chunksize;
#endif
Fix arena chunk purge/dealloc race conditions. Fix arena_chunk_dealloc() to put the new spare in a consistent state before dropping the arena mutex to deallocate the previous spare. Fix arena_run_dalloc() to insert a newly dirtied chunk into the chunks_dirty list before potentially deallocating the chunk, so that dirty page accounting is self-consistent.
2010-04-14 11:53:21 +08:00
} else
arena->spare = chunk;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
static arena_run_t *
arena_run_alloc(arena_t *arena, size_t size, bool large, bool zero)
{
arena_chunk_t *chunk;
arena_run_t *run;
arena_chunk_map_t *mapelm, key;
assert(size <= arena_maxclass);
assert((size & PAGE_MASK) == 0);
/* Search the arena's chunks for the lowest best fit. */
key.bits = size | CHUNK_MAP_KEY;
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
mapelm = arena_avail_tree_nsearch(&arena->runs_avail_dirty, &key);
if (mapelm != NULL) {
arena_chunk_t *run_chunk = CHUNK_ADDR2BASE(mapelm);
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
size_t pageind = (((uintptr_t)mapelm -
(uintptr_t)run_chunk->map) / sizeof(arena_chunk_map_t))
+ map_bias;
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
run = (arena_run_t *)((uintptr_t)run_chunk + (pageind <<
PAGE_SHIFT));
arena_run_split(arena, run, size, large, zero);
return (run);
}
mapelm = arena_avail_tree_nsearch(&arena->runs_avail_clean, &key);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
if (mapelm != NULL) {
arena_chunk_t *run_chunk = CHUNK_ADDR2BASE(mapelm);
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
size_t pageind = (((uintptr_t)mapelm -
(uintptr_t)run_chunk->map) / sizeof(arena_chunk_map_t))
+ map_bias;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
mmap()/munmap() without arena->lock or bin->lock.
2010-03-15 10:43:56 +08:00
run = (arena_run_t *)((uintptr_t)run_chunk + (pageind <<
PAGE_SHIFT));
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
arena_run_split(arena, run, size, large, zero);
return (run);
}
/*
* No usable runs. Create a new chunk from which to allocate the run.
*/
chunk = arena_chunk_alloc(arena);
mmap()/munmap() without arena->lock or bin->lock.
2010-03-15 10:43:56 +08:00
if (chunk != NULL) {
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
run = (arena_run_t *)((uintptr_t)chunk + (map_bias <<
PAGE_SHIFT));
mmap()/munmap() without arena->lock or bin->lock.
2010-03-15 10:43:56 +08:00
arena_run_split(arena, run, size, large, zero);
return (run);
}
/*
* arena_chunk_alloc() failed, but another thread may have made
* sufficient memory available while this one dropped arena->lock in
* arena_chunk_alloc(), so search one more time.
*/
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
mapelm = arena_avail_tree_nsearch(&arena->runs_avail_dirty, &key);
if (mapelm != NULL) {
arena_chunk_t *run_chunk = CHUNK_ADDR2BASE(mapelm);
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
size_t pageind = (((uintptr_t)mapelm -
(uintptr_t)run_chunk->map) / sizeof(arena_chunk_map_t))
+ map_bias;
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
run = (arena_run_t *)((uintptr_t)run_chunk + (pageind <<
PAGE_SHIFT));
arena_run_split(arena, run, size, large, zero);
return (run);
}
mapelm = arena_avail_tree_nsearch(&arena->runs_avail_clean, &key);
mmap()/munmap() without arena->lock or bin->lock.
2010-03-15 10:43:56 +08:00
if (mapelm != NULL) {
arena_chunk_t *run_chunk = CHUNK_ADDR2BASE(mapelm);
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
size_t pageind = (((uintptr_t)mapelm -
(uintptr_t)run_chunk->map) / sizeof(arena_chunk_map_t))
+ map_bias;
mmap()/munmap() without arena->lock or bin->lock.
2010-03-15 10:43:56 +08:00
run = (arena_run_t *)((uintptr_t)run_chunk + (pageind <<
PAGE_SHIFT));
arena_run_split(arena, run, size, large, zero);
return (run);
}
return (NULL);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
static inline void
arena_maybe_purge(arena_t *arena)
{
/* Enforce opt_lg_dirty_mult. */
Revert re-addition of purge_lock. Linux kernels have been capable of concurrent page table access since 2.6.27, so this hack is not necessary for modern kernels.
2010-04-09 11:31:58 +08:00
if (opt_lg_dirty_mult >= 0 && arena->ndirty > arena->npurgatory &&
(arena->ndirty - arena->npurgatory) > chunk_npages &&
(arena->nactive >> opt_lg_dirty_mult) < (arena->ndirty -
arena->npurgatory))
Add the "arenas.purge" mallctl.
2010-10-01 07:55:08 +08:00
arena_purge(arena, false);
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
}
static inline void
arena_chunk_purge(arena_t *arena, arena_chunk_t *chunk)
{
ql_head(arena_chunk_map_t) mapelms;
arena_chunk_map_t *mapelm;
Change CHUNK_MAP_ZEROED to CHUNK_MAP_UNZEROED. Invert the chunk map bit that tracks whether a page is zeroed, so that for zeroed arena chunks, the interior of the page map does not need to be initialized (as it consists entirely of zero bytes).
2010-10-02 08:53:37 +08:00
size_t pageind, flag_unzeroed;
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
#ifdef JEMALLOC_DEBUG
size_t ndirty;
#endif
#ifdef JEMALLOC_STATS
size_t nmadvise;
#endif
ql_new(&mapelms);
Change CHUNK_MAP_ZEROED to CHUNK_MAP_UNZEROED. Invert the chunk map bit that tracks whether a page is zeroed, so that for zeroed arena chunks, the interior of the page map does not need to be initialized (as it consists entirely of zero bytes).
2010-10-02 08:53:37 +08:00
flag_unzeroed =
Port to Mac OS X. Add Mac OS X support, based in large part on the OS X support in Mozilla's version of jemalloc.
2010-09-06 01:35:13 +08:00
#ifdef JEMALLOC_PURGE_MADVISE_DONTNEED
/*
* madvise(..., MADV_DONTNEED) results in zero-filled pages for anonymous
* mappings, but not for file-backed mappings.
*/
# ifdef JEMALLOC_SWAP
Change CHUNK_MAP_ZEROED to CHUNK_MAP_UNZEROED. Invert the chunk map bit that tracks whether a page is zeroed, so that for zeroed arena chunks, the interior of the page map does not need to be initialized (as it consists entirely of zero bytes).
2010-10-02 08:53:37 +08:00
swap_enabled ? CHUNK_MAP_UNZEROED :
Port to Mac OS X. Add Mac OS X support, based in large part on the OS X support in Mozilla's version of jemalloc.
2010-09-06 01:35:13 +08:00
# endif
0;
Change CHUNK_MAP_ZEROED to CHUNK_MAP_UNZEROED. Invert the chunk map bit that tracks whether a page is zeroed, so that for zeroed arena chunks, the interior of the page map does not need to be initialized (as it consists entirely of zero bytes).
2010-10-02 08:53:37 +08:00
#else
CHUNK_MAP_UNZEROED;
Port to Mac OS X. Add Mac OS X support, based in large part on the OS X support in Mozilla's version of jemalloc.
2010-09-06 01:35:13 +08:00
#endif
Set/clear CHUNK_MAP_ZEROED in arena_chunk_purge(). Properly set/clear CHUNK_MAP_ZEROED for all purged pages, according to whether the pages are (potentially) file-backed or anonymous. This was merely a performance pessimization for the anonymous mapping case, but was a calloc()-related bug for the swap_enabled case.
2010-03-23 02:45:01 +08:00
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
/*
* If chunk is the spare, temporarily re-allocate it, 1) so that its
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
* run is reinserted into runs_avail_dirty, and 2) so that it cannot be
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
* completely discarded by another thread while arena->lock is dropped
* by this thread. Note that the arena_run_dalloc() call will
* implicitly deallocate the chunk, so no explicit action is required
* in this function to deallocate the chunk.
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
*
* Note that once a chunk contains dirty pages, it cannot again contain
* a single run unless 1) it is a dirty run, or 2) this function purges
* dirty pages and causes the transition to a single clean run. Thus
* (chunk == arena->spare) is possible, but it is not possible for
* this function to be called on the spare unless it contains a dirty
* run.
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
*/
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
if (chunk == arena->spare) {
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
assert((chunk->map[0].bits & CHUNK_MAP_DIRTY) != 0);
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
arena_chunk_alloc(arena);
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
}
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
/* Temporarily allocate all free dirty runs within chunk. */
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
for (pageind = map_bias; pageind < chunk_npages;) {
mapelm = &chunk->map[pageind-map_bias];
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
if ((mapelm->bits & CHUNK_MAP_ALLOCATED) == 0) {
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
size_t npages;
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
npages = mapelm->bits >> PAGE_SHIFT;
Fix a run initialization race condition. Initialize small run header before dropping arena->lock, arena_chunk_purge() relies on valid small run headers during run iteration. Add some assertions.
2010-03-16 13:25:23 +08:00
assert(pageind + npages <= chunk_npages);
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
if (mapelm->bits & CHUNK_MAP_DIRTY) {
Set/clear CHUNK_MAP_ZEROED in arena_chunk_purge(). Properly set/clear CHUNK_MAP_ZEROED for all purged pages, according to whether the pages are (potentially) file-backed or anonymous. This was merely a performance pessimization for the anonymous mapping case, but was a calloc()-related bug for the swap_enabled case.
2010-03-23 02:45:01 +08:00
size_t i;
Add the "stats.cactive" mallctl. Add the "stats.cactive" mallctl, which can be used to efficiently and repeatedly query approximately how much active memory the application is utilizing.
2011-03-19 08:56:14 +08:00
#ifdef JEMALLOC_STATS
size_t cactive_diff;
#endif
Set/clear CHUNK_MAP_ZEROED in arena_chunk_purge(). Properly set/clear CHUNK_MAP_ZEROED for all purged pages, according to whether the pages are (potentially) file-backed or anonymous. This was merely a performance pessimization for the anonymous mapping case, but was a calloc()-related bug for the swap_enabled case.
2010-03-23 02:45:01 +08:00
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
arena_avail_tree_remove(
&arena->runs_avail_dirty, mapelm);
Set/clear CHUNK_MAP_ZEROED in arena_chunk_purge(). Properly set/clear CHUNK_MAP_ZEROED for all purged pages, according to whether the pages are (potentially) file-backed or anonymous. This was merely a performance pessimization for the anonymous mapping case, but was a calloc()-related bug for the swap_enabled case.
2010-03-23 02:45:01 +08:00
Fix numerous arena bugs. In arena_ralloc_large_grow(), update the map element for the end of the newly grown run, rather than the interior map element that was the beginning of the appended run. This is a long-standing bug, and it had the potential to cause massive corruption, but triggering it required roughly the following sequence of events: 1) Large in-place growing realloc(), with left-over space in the run that followed the large object. 2) Allocation of the remainder run left over from (1). 3) Deallocation of the remainder run *before* deallocation of the large run, with unfortunate interior map state left over from previous run allocation/deallocation activity, such that one or more pages of allocated memory would be treated as part of the remainder run during run coalescing. In summary, this was a bad bug, but it was difficult to trigger. In arena_bin_malloc_hard(), if another thread wins the race to allocate a bin run, dispose of the spare run via arena_bin_lower_run() rather than arena_run_dalloc(), since the run has already been prepared for use as a bin run. This bug has existed since March 14, 2010: e00572b384c81bd2aba57fac32f7077a34388915 mmap()/munmap() without arena->lock or bin->lock. Fix bugs in arena_dalloc_bin_run(), arena_trim_head(), arena_trim_tail(), and arena_ralloc_large_grow() that could cause the CHUNK_MAP_UNZEROED map bit to become corrupted. These are all long-standing bugs, but the chances of them actually causing problems was much lower before the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion. Fix a large run statistics regression in arena_ralloc_large_grow() that was introduced on September 17, 2010: 8e3c3c61b5bb676a705450708e7e79698cdc9e0c Add {,r,s,d}allocm(). Add debug code to validate that supposedly pre-zeroed memory really is.
2010-10-18 08:51:37 +08:00
mapelm->bits = (npages << PAGE_SHIFT) |
Fix arena bugs. Move part of arena_bin_lower_run() into the callers, since the conditions under which it should be called differ slightly between callers. Fix arena_chunk_purge() to omit run size in the last map entry for each run it temporarily allocates.
2010-10-18 11:57:30 +08:00
flag_unzeroed | CHUNK_MAP_LARGE |
CHUNK_MAP_ALLOCATED;
Set/clear CHUNK_MAP_ZEROED in arena_chunk_purge(). Properly set/clear CHUNK_MAP_ZEROED for all purged pages, according to whether the pages are (potentially) file-backed or anonymous. This was merely a performance pessimization for the anonymous mapping case, but was a calloc()-related bug for the swap_enabled case.
2010-03-23 02:45:01 +08:00
/*
* Update internal elements in the page map, so
Change CHUNK_MAP_ZEROED to CHUNK_MAP_UNZEROED. Invert the chunk map bit that tracks whether a page is zeroed, so that for zeroed arena chunks, the interior of the page map does not need to be initialized (as it consists entirely of zero bytes).
2010-10-02 08:53:37 +08:00
* that CHUNK_MAP_UNZEROED is properly set.
Set/clear CHUNK_MAP_ZEROED in arena_chunk_purge(). Properly set/clear CHUNK_MAP_ZEROED for all purged pages, according to whether the pages are (potentially) file-backed or anonymous. This was merely a performance pessimization for the anonymous mapping case, but was a calloc()-related bug for the swap_enabled case.
2010-03-23 02:45:01 +08:00
*/
for (i = 1; i < npages - 1; i++) {
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
chunk->map[pageind+i-map_bias].bits =
Change CHUNK_MAP_ZEROED to CHUNK_MAP_UNZEROED. Invert the chunk map bit that tracks whether a page is zeroed, so that for zeroed arena chunks, the interior of the page map does not need to be initialized (as it consists entirely of zero bytes).
2010-10-02 08:53:37 +08:00
flag_unzeroed;
Set/clear CHUNK_MAP_ZEROED in arena_chunk_purge(). Properly set/clear CHUNK_MAP_ZEROED for all purged pages, according to whether the pages are (potentially) file-backed or anonymous. This was merely a performance pessimization for the anonymous mapping case, but was a calloc()-related bug for the swap_enabled case.
2010-03-23 02:45:01 +08:00
}
if (npages > 1) {
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
chunk->map[
pageind+npages-1-map_bias].bits =
Fix arena bugs. Move part of arena_bin_lower_run() into the callers, since the conditions under which it should be called differ slightly between callers. Fix arena_chunk_purge() to omit run size in the last map entry for each run it temporarily allocates.
2010-10-18 11:57:30 +08:00
flag_unzeroed | CHUNK_MAP_LARGE |
CHUNK_MAP_ALLOCATED;
Set/clear CHUNK_MAP_ZEROED in arena_chunk_purge(). Properly set/clear CHUNK_MAP_ZEROED for all purged pages, according to whether the pages are (potentially) file-backed or anonymous. This was merely a performance pessimization for the anonymous mapping case, but was a calloc()-related bug for the swap_enabled case.
2010-03-23 02:45:01 +08:00
}
Add the "stats.cactive" mallctl. Add the "stats.cactive" mallctl, which can be used to efficiently and repeatedly query approximately how much active memory the application is utilizing.
2011-03-19 08:56:14 +08:00
#ifdef JEMALLOC_STATS
/*
* Update stats_cactive if nactive is crossing a
* chunk multiple.
*/
cactive_diff = CHUNK_CEILING((arena->nactive +
npages) << PAGE_SHIFT) -
CHUNK_CEILING(arena->nactive << PAGE_SHIFT);
if (cactive_diff != 0)
stats_cactive_add(cactive_diff);
#endif
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
arena->nactive += npages;
/* Append to list for later processing. */
ql_elm_new(mapelm, u.ql_link);
ql_tail_insert(&mapelms, mapelm, u.ql_link);
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
}
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
pageind += npages;
} else {
/* Skip allocated run. */
Set/clear CHUNK_MAP_ZEROED in arena_chunk_purge(). Properly set/clear CHUNK_MAP_ZEROED for all purged pages, according to whether the pages are (potentially) file-backed or anonymous. This was merely a performance pessimization for the anonymous mapping case, but was a calloc()-related bug for the swap_enabled case.
2010-03-23 02:45:01 +08:00
if (mapelm->bits & CHUNK_MAP_LARGE)
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
pageind += mapelm->bits >> PAGE_SHIFT;
Set/clear CHUNK_MAP_ZEROED in arena_chunk_purge(). Properly set/clear CHUNK_MAP_ZEROED for all purged pages, according to whether the pages are (potentially) file-backed or anonymous. This was merely a performance pessimization for the anonymous mapping case, but was a calloc()-related bug for the swap_enabled case.
2010-03-23 02:45:01 +08:00
else {
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
arena_run_t *run = (arena_run_t *)((uintptr_t)
Fix a run initialization race condition. Initialize small run header before dropping arena->lock, arena_chunk_purge() relies on valid small run headers during run iteration. Add some assertions.
2010-03-16 13:25:23 +08:00
chunk + (uintptr_t)(pageind << PAGE_SHIFT));
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
assert((mapelm->bits >> PAGE_SHIFT) == 0);
Use bitmaps to track small regions. The previous free list implementation, which embedded singly linked lists in available regions, had the unfortunate side effect of causing many cache misses during thread cache fills. Fix this in two places: - arena_run_t: Use a new bitmap implementation to track which regions are available. Furthermore, revert to preferring the lowest available region (as jemalloc did with its old bitmap-based approach). - tcache_t: Move read-only tcache_bin_t metadata into tcache_bin_info_t, and add a contiguous array of pointers to tcache_t in order to track cached objects. This substantially increases the size of tcache_t, but results in much higher data locality for common tcache operations. As a side benefit, it is again possible to efficiently flush the least recently used cached objects, so this change changes flushing from MRU to LRU. The new bitmap implementation uses a multi-level summary approach to make finding the lowest available region very fast. In practice, bitmaps only have one or two levels, though the implementation is general enough to handle extremely large bitmaps, mainly so that large page sizes can still be entertained. Fix tcache_bin_flush_large() to always flush statistics, in the same way that tcache_bin_flush_small() was recently fixed. Use JEMALLOC_DEBUG rather than NDEBUG. Add dassert(), and use it for debug-only asserts.
2011-03-17 01:30:13 +08:00
dassert(run->magic == ARENA_RUN_MAGIC);
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
size_t binind = arena_bin_index(arena,
run->bin);
arena_bin_info_t *bin_info =
&arena_bin_info[binind];
pageind += bin_info->run_size >> PAGE_SHIFT;
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
}
}
}
Fix a run initialization race condition. Initialize small run header before dropping arena->lock, arena_chunk_purge() relies on valid small run headers during run iteration. Add some assertions.
2010-03-16 13:25:23 +08:00
assert(pageind == chunk_npages);
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
#ifdef JEMALLOC_DEBUG
ndirty = chunk->ndirty;
#endif
#ifdef JEMALLOC_STATS
arena->stats.purged += chunk->ndirty;
#endif
arena->ndirty -= chunk->ndirty;
chunk->ndirty = 0;
ql_remove(&arena->chunks_dirty, chunk, link_dirty);
chunk->dirtied = false;
malloc_mutex_unlock(&arena->lock);
#ifdef JEMALLOC_STATS
nmadvise = 0;
#endif
ql_foreach(mapelm, &mapelms, u.ql_link) {
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
size_t pageind = (((uintptr_t)mapelm - (uintptr_t)chunk->map) /
sizeof(arena_chunk_map_t)) + map_bias;
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
size_t npages = mapelm->bits >> PAGE_SHIFT;
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
Fix a run initialization race condition. Initialize small run header before dropping arena->lock, arena_chunk_purge() relies on valid small run headers during run iteration. Add some assertions.
2010-03-16 13:25:23 +08:00
assert(pageind + npages <= chunk_npages);
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
#ifdef JEMALLOC_DEBUG
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
assert(ndirty >= npages);
ndirty -= npages;
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
#endif
Port to Mac OS X. Add Mac OS X support, based in large part on the OS X support in Mozilla's version of jemalloc.
2010-09-06 01:35:13 +08:00
#ifdef JEMALLOC_PURGE_MADVISE_DONTNEED
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
madvise((void *)((uintptr_t)chunk + (pageind << PAGE_SHIFT)),
(npages << PAGE_SHIFT), MADV_DONTNEED);
Port to Mac OS X. Add Mac OS X support, based in large part on the OS X support in Mozilla's version of jemalloc.
2010-09-06 01:35:13 +08:00
#elif defined(JEMALLOC_PURGE_MADVISE_FREE)
madvise((void *)((uintptr_t)chunk + (pageind << PAGE_SHIFT)),
(npages << PAGE_SHIFT), MADV_FREE);
#else
# error "No method defined for purging unused dirty pages."
#endif
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
#ifdef JEMALLOC_STATS
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
nmadvise++;
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
#endif
}
#ifdef JEMALLOC_DEBUG
assert(ndirty == 0);
#endif
malloc_mutex_lock(&arena->lock);
#ifdef JEMALLOC_STATS
arena->stats.nmadvise += nmadvise;
#endif
/* Deallocate runs. */
for (mapelm = ql_first(&mapelms); mapelm != NULL;
mapelm = ql_first(&mapelms)) {
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
size_t pageind = (((uintptr_t)mapelm - (uintptr_t)chunk->map) /
sizeof(arena_chunk_map_t)) + map_bias;
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
arena_run_t *run = (arena_run_t *)((uintptr_t)chunk +
(uintptr_t)(pageind << PAGE_SHIFT));
ql_remove(&mapelms, mapelm, u.ql_link);
arena_run_dalloc(arena, run, false);
}
}
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
static void
Add the "arenas.purge" mallctl.
2010-10-01 07:55:08 +08:00
arena_purge(arena_t *arena, bool all)
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
{
arena_chunk_t *chunk;
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
size_t npurgatory;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
#ifdef JEMALLOC_DEBUG
size_t ndirty = 0;
Modify dirty page purging algorithm. Convert chunks_dirty from a red-black tree to a doubly linked list, and use it to purge dirty pages from chunks in FIFO order. Add a lock around the code that purges dirty pages via madvise(2), in order to avoid kernel contention. If lock acquisition fails, indefinitely postpone purging dirty pages. Add a lower limit of one chunk worth of dirty pages per arena for purging, in addition to the active:dirty ratio. When purging, purge all dirty pages from at least one chunk, but rather than purging enough pages to drop to half the purging threshold, merely drop to the threshold.
2010-03-05 13:35:07 +08:00
ql_foreach(chunk, &arena->chunks_dirty, link_dirty) {
assert(chunk->dirtied);
ndirty += chunk->ndirty;
}
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
assert(ndirty == arena->ndirty);
#endif
Fix an assertion in arena_purge(). arena_purge() may be called even when there are no dirty pages, so loosen an assertion accordingly.
2011-03-24 11:39:02 +08:00
assert(arena->ndirty > arena->npurgatory || all);
Fix assertions in arena_purge(). Fix assertions in arena_purge() to accurately reflect the constraints in arena_maybe_purge(). There were two bugs here, one of which merely weakened the assertion, and the other of which referred to an uninitialized variable (typo; used npurgatory instead of arena->npurgatory).
2011-06-13 07:46:03 +08:00
assert(arena->ndirty - arena->npurgatory > chunk_npages || all);
Fix an assertion in arena_purge(). arena_purge() may be called even when there are no dirty pages, so loosen an assertion accordingly.
2011-03-24 11:39:02 +08:00
assert((arena->nactive >> opt_lg_dirty_mult) < (arena->ndirty -
Fix assertions in arena_purge(). Fix assertions in arena_purge() to accurately reflect the constraints in arena_maybe_purge(). There were two bugs here, one of which merely weakened the assertion, and the other of which referred to an uninitialized variable (typo; used npurgatory instead of arena->npurgatory).
2011-06-13 07:46:03 +08:00
arena->npurgatory) || all);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
#ifdef JEMALLOC_STATS
arena->stats.npurge++;
#endif
/*
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
* Compute the minimum number of pages that this thread should try to
Revert re-addition of purge_lock. Linux kernels have been capable of concurrent page table access since 2.6.27, so this hack is not necessary for modern kernels.
2010-04-09 11:31:58 +08:00
* purge, and add the result to arena->npurgatory. This will keep
* multiple threads from racing to reduce ndirty below the threshold.
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
*/
Add the "arenas.purge" mallctl.
2010-10-01 07:55:08 +08:00
npurgatory = arena->ndirty - arena->npurgatory;
Fix an assertion in arena_purge(). arena_purge() may be called even when there are no dirty pages, so loosen an assertion accordingly.
2011-03-24 11:39:02 +08:00
if (all == false) {
assert(npurgatory >= arena->nactive >> opt_lg_dirty_mult);
Add the "arenas.purge" mallctl.
2010-10-01 07:55:08 +08:00
npurgatory -= arena->nactive >> opt_lg_dirty_mult;
Fix an assertion in arena_purge(). arena_purge() may be called even when there are no dirty pages, so loosen an assertion accordingly.
2011-03-24 11:39:02 +08:00
}
Revert re-addition of purge_lock. Linux kernels have been capable of concurrent page table access since 2.6.27, so this hack is not necessary for modern kernels.
2010-04-09 11:31:58 +08:00
arena->npurgatory += npurgatory;
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
while (npurgatory > 0) {
/* Get next chunk with dirty pages. */
Modify dirty page purging algorithm. Convert chunks_dirty from a red-black tree to a doubly linked list, and use it to purge dirty pages from chunks in FIFO order. Add a lock around the code that purges dirty pages via madvise(2), in order to avoid kernel contention. If lock acquisition fails, indefinitely postpone purging dirty pages. Add a lower limit of one chunk worth of dirty pages per arena for purging, in addition to the active:dirty ratio. When purging, purge all dirty pages from at least one chunk, but rather than purging enough pages to drop to half the purging threshold, merely drop to the threshold.
2010-03-05 13:35:07 +08:00
chunk = ql_first(&arena->chunks_dirty);
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
if (chunk == NULL) {
/*
* This thread was unable to purge as many pages as
* originally intended, due to races with other threads
Revert re-addition of purge_lock. Linux kernels have been capable of concurrent page table access since 2.6.27, so this hack is not necessary for modern kernels.
2010-04-09 11:31:58 +08:00
* that either did some of the purging work, or re-used
* dirty pages.
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
*/
Revert re-addition of purge_lock. Linux kernels have been capable of concurrent page table access since 2.6.27, so this hack is not necessary for modern kernels.
2010-04-09 11:31:58 +08:00
arena->npurgatory -= npurgatory;
return;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
while (chunk->ndirty == 0) {
Modify dirty page purging algorithm. Convert chunks_dirty from a red-black tree to a doubly linked list, and use it to purge dirty pages from chunks in FIFO order. Add a lock around the code that purges dirty pages via madvise(2), in order to avoid kernel contention. If lock acquisition fails, indefinitely postpone purging dirty pages. Add a lower limit of one chunk worth of dirty pages per arena for purging, in addition to the active:dirty ratio. When purging, purge all dirty pages from at least one chunk, but rather than purging enough pages to drop to half the purging threshold, merely drop to the threshold.
2010-03-05 13:35:07 +08:00
ql_remove(&arena->chunks_dirty, chunk, link_dirty);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
chunk->dirtied = false;
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
chunk = ql_first(&arena->chunks_dirty);
if (chunk == NULL) {
/* Same logic as for above. */
Revert re-addition of purge_lock. Linux kernels have been capable of concurrent page table access since 2.6.27, so this hack is not necessary for modern kernels.
2010-04-09 11:31:58 +08:00
arena->npurgatory -= npurgatory;
return;
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
}
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
Revert re-addition of purge_lock. Linux kernels have been capable of concurrent page table access since 2.6.27, so this hack is not necessary for modern kernels.
2010-04-09 11:31:58 +08:00
if (chunk->ndirty > npurgatory) {
/*
* This thread will, at a minimum, purge all the dirty
* pages in chunk, so set npurgatory to reflect this
* thread's commitment to purge the pages. This tends
* to reduce the chances of the following scenario:
*
* 1) This thread sets arena->npurgatory such that
* (arena->ndirty - arena->npurgatory) is at the
* threshold.
* 2) This thread drops arena->lock.
* 3) Another thread causes one or more pages to be
* dirtied, and immediately determines that it must
* purge dirty pages.
*
* If this scenario *does* play out, that's okay,
* because all of the purging work being done really
* needs to happen.
*/
arena->npurgatory += chunk->ndirty - npurgatory;
npurgatory = chunk->ndirty;
}
arena->npurgatory -= chunk->ndirty;
npurgatory -= chunk->ndirty;
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
arena_chunk_purge(arena, chunk);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
}
Add the "arenas.purge" mallctl.
2010-10-01 07:55:08 +08:00
void
arena_purge_all(arena_t *arena)
{
malloc_mutex_lock(&arena->lock);
arena_purge(arena, true);
malloc_mutex_unlock(&arena->lock);
}
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
static void
arena_run_dalloc(arena_t *arena, arena_run_t *run, bool dirty)
{
arena_chunk_t *chunk;
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
size_t size, run_ind, run_pages, flag_dirty;
arena_avail_tree_t *runs_avail;
Add the "stats.cactive" mallctl. Add the "stats.cactive" mallctl, which can be used to efficiently and repeatedly query approximately how much active memory the application is utilizing.
2011-03-19 08:56:14 +08:00
#ifdef JEMALLOC_STATS
size_t cactive_diff;
#endif
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
chunk = (arena_chunk_t *)CHUNK_ADDR2BASE(run);
run_ind = (size_t)(((uintptr_t)run - (uintptr_t)chunk)
>> PAGE_SHIFT);
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
assert(run_ind >= map_bias);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
assert(run_ind < chunk_npages);
Fix arena bugs. Move part of arena_bin_lower_run() into the callers, since the conditions under which it should be called differ slightly between callers. Fix arena_chunk_purge() to omit run size in the last map entry for each run it temporarily allocates.
2010-10-18 11:57:30 +08:00
if ((chunk->map[run_ind-map_bias].bits & CHUNK_MAP_LARGE) != 0) {
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
size = chunk->map[run_ind-map_bias].bits & ~PAGE_MASK;
Fix arena bugs. Move part of arena_bin_lower_run() into the callers, since the conditions under which it should be called differ slightly between callers. Fix arena_chunk_purge() to omit run size in the last map entry for each run it temporarily allocates.
2010-10-18 11:57:30 +08:00
assert(size == PAGE_SIZE ||
(chunk->map[run_ind+(size>>PAGE_SHIFT)-1-map_bias].bits &
~PAGE_MASK) == 0);
assert((chunk->map[run_ind+(size>>PAGE_SHIFT)-1-map_bias].bits &
CHUNK_MAP_LARGE) != 0);
assert((chunk->map[run_ind+(size>>PAGE_SHIFT)-1-map_bias].bits &
CHUNK_MAP_ALLOCATED) != 0);
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
} else {
size_t binind = arena_bin_index(arena, run->bin);
arena_bin_info_t *bin_info = &arena_bin_info[binind];
size = bin_info->run_size;
}
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
run_pages = (size >> PAGE_SHIFT);
Add the "stats.cactive" mallctl. Add the "stats.cactive" mallctl, which can be used to efficiently and repeatedly query approximately how much active memory the application is utilizing.
2011-03-19 08:56:14 +08:00
#ifdef JEMALLOC_STATS
/* Update stats_cactive if nactive is crossing a chunk multiple. */
cactive_diff = CHUNK_CEILING(arena->nactive << PAGE_SHIFT) -
CHUNK_CEILING((arena->nactive - run_pages) << PAGE_SHIFT);
if (cactive_diff != 0)
stats_cactive_sub(cactive_diff);
#endif
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
arena->nactive -= run_pages;
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
/*
* The run is dirty if the caller claims to have dirtied it, as well as
* if it was already dirty before being allocated.
*/
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
if ((chunk->map[run_ind-map_bias].bits & CHUNK_MAP_DIRTY) != 0)
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
dirty = true;
flag_dirty = dirty ? CHUNK_MAP_DIRTY : 0;
runs_avail = dirty ? &arena->runs_avail_dirty :
&arena->runs_avail_clean;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
/* Mark pages as unallocated in the chunk map. */
if (dirty) {
Fix numerous arena bugs. In arena_ralloc_large_grow(), update the map element for the end of the newly grown run, rather than the interior map element that was the beginning of the appended run. This is a long-standing bug, and it had the potential to cause massive corruption, but triggering it required roughly the following sequence of events: 1) Large in-place growing realloc(), with left-over space in the run that followed the large object. 2) Allocation of the remainder run left over from (1). 3) Deallocation of the remainder run *before* deallocation of the large run, with unfortunate interior map state left over from previous run allocation/deallocation activity, such that one or more pages of allocated memory would be treated as part of the remainder run during run coalescing. In summary, this was a bad bug, but it was difficult to trigger. In arena_bin_malloc_hard(), if another thread wins the race to allocate a bin run, dispose of the spare run via arena_bin_lower_run() rather than arena_run_dalloc(), since the run has already been prepared for use as a bin run. This bug has existed since March 14, 2010: e00572b384c81bd2aba57fac32f7077a34388915 mmap()/munmap() without arena->lock or bin->lock. Fix bugs in arena_dalloc_bin_run(), arena_trim_head(), arena_trim_tail(), and arena_ralloc_large_grow() that could cause the CHUNK_MAP_UNZEROED map bit to become corrupted. These are all long-standing bugs, but the chances of them actually causing problems was much lower before the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion. Fix a large run statistics regression in arena_ralloc_large_grow() that was introduced on September 17, 2010: 8e3c3c61b5bb676a705450708e7e79698cdc9e0c Add {,r,s,d}allocm(). Add debug code to validate that supposedly pre-zeroed memory really is.
2010-10-18 08:51:37 +08:00
chunk->map[run_ind-map_bias].bits = size | CHUNK_MAP_DIRTY;
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
chunk->map[run_ind+run_pages-1-map_bias].bits = size |
Fix numerous arena bugs. In arena_ralloc_large_grow(), update the map element for the end of the newly grown run, rather than the interior map element that was the beginning of the appended run. This is a long-standing bug, and it had the potential to cause massive corruption, but triggering it required roughly the following sequence of events: 1) Large in-place growing realloc(), with left-over space in the run that followed the large object. 2) Allocation of the remainder run left over from (1). 3) Deallocation of the remainder run *before* deallocation of the large run, with unfortunate interior map state left over from previous run allocation/deallocation activity, such that one or more pages of allocated memory would be treated as part of the remainder run during run coalescing. In summary, this was a bad bug, but it was difficult to trigger. In arena_bin_malloc_hard(), if another thread wins the race to allocate a bin run, dispose of the spare run via arena_bin_lower_run() rather than arena_run_dalloc(), since the run has already been prepared for use as a bin run. This bug has existed since March 14, 2010: e00572b384c81bd2aba57fac32f7077a34388915 mmap()/munmap() without arena->lock or bin->lock. Fix bugs in arena_dalloc_bin_run(), arena_trim_head(), arena_trim_tail(), and arena_ralloc_large_grow() that could cause the CHUNK_MAP_UNZEROED map bit to become corrupted. These are all long-standing bugs, but the chances of them actually causing problems was much lower before the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion. Fix a large run statistics regression in arena_ralloc_large_grow() that was introduced on September 17, 2010: 8e3c3c61b5bb676a705450708e7e79698cdc9e0c Add {,r,s,d}allocm(). Add debug code to validate that supposedly pre-zeroed memory really is.
2010-10-18 08:51:37 +08:00
CHUNK_MAP_DIRTY;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
chunk->ndirty += run_pages;
arena->ndirty += run_pages;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
} else {
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
chunk->map[run_ind-map_bias].bits = size |
Change CHUNK_MAP_ZEROED to CHUNK_MAP_UNZEROED. Invert the chunk map bit that tracks whether a page is zeroed, so that for zeroed arena chunks, the interior of the page map does not need to be initialized (as it consists entirely of zero bytes).
2010-10-02 08:53:37 +08:00
(chunk->map[run_ind-map_bias].bits & CHUNK_MAP_UNZEROED);
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
chunk->map[run_ind+run_pages-1-map_bias].bits = size |
(chunk->map[run_ind+run_pages-1-map_bias].bits &
Change CHUNK_MAP_ZEROED to CHUNK_MAP_UNZEROED. Invert the chunk map bit that tracks whether a page is zeroed, so that for zeroed arena chunks, the interior of the page map does not need to be initialized (as it consists entirely of zero bytes).
2010-10-02 08:53:37 +08:00
CHUNK_MAP_UNZEROED);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
/* Try to coalesce forward. */
if (run_ind + run_pages < chunk_npages &&
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
(chunk->map[run_ind+run_pages-map_bias].bits & CHUNK_MAP_ALLOCATED)
== 0 && (chunk->map[run_ind+run_pages-map_bias].bits &
CHUNK_MAP_DIRTY) == flag_dirty) {
size_t nrun_size = chunk->map[run_ind+run_pages-map_bias].bits &
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
~PAGE_MASK;
Add assertions to run coalescing. Assert that the chunk map bits at the ends of the runs that participate in coalescing are self-consistent.
2010-10-18 10:56:09 +08:00
size_t nrun_pages = nrun_size >> PAGE_SHIFT;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
/*
* Remove successor from runs_avail; the coalesced run is
* inserted later.
*/
Add assertions to run coalescing. Assert that the chunk map bits at the ends of the runs that participate in coalescing are self-consistent.
2010-10-18 10:56:09 +08:00
assert((chunk->map[run_ind+run_pages+nrun_pages-1-map_bias].bits
& ~PAGE_MASK) == nrun_size);
assert((chunk->map[run_ind+run_pages+nrun_pages-1-map_bias].bits
& CHUNK_MAP_ALLOCATED) == 0);
assert((chunk->map[run_ind+run_pages+nrun_pages-1-map_bias].bits
& CHUNK_MAP_DIRTY) == flag_dirty);
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
arena_avail_tree_remove(runs_avail,
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
&chunk->map[run_ind+run_pages-map_bias]);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
size += nrun_size;
Add assertions to run coalescing. Assert that the chunk map bits at the ends of the runs that participate in coalescing are self-consistent.
2010-10-18 10:56:09 +08:00
run_pages += nrun_pages;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
chunk->map[run_ind-map_bias].bits = size |
(chunk->map[run_ind-map_bias].bits & CHUNK_MAP_FLAGS_MASK);
chunk->map[run_ind+run_pages-1-map_bias].bits = size |
(chunk->map[run_ind+run_pages-1-map_bias].bits &
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
CHUNK_MAP_FLAGS_MASK);
}
/* Try to coalesce backward. */
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
if (run_ind > map_bias && (chunk->map[run_ind-1-map_bias].bits &
CHUNK_MAP_ALLOCATED) == 0 && (chunk->map[run_ind-1-map_bias].bits &
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
CHUNK_MAP_DIRTY) == flag_dirty) {
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
size_t prun_size = chunk->map[run_ind-1-map_bias].bits &
~PAGE_MASK;
Add assertions to run coalescing. Assert that the chunk map bits at the ends of the runs that participate in coalescing are self-consistent.
2010-10-18 10:56:09 +08:00
size_t prun_pages = prun_size >> PAGE_SHIFT;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
Add assertions to run coalescing. Assert that the chunk map bits at the ends of the runs that participate in coalescing are self-consistent.
2010-10-18 10:56:09 +08:00
run_ind -= prun_pages;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
/*
* Remove predecessor from runs_avail; the coalesced run is
* inserted later.
*/
Add assertions to run coalescing. Assert that the chunk map bits at the ends of the runs that participate in coalescing are self-consistent.
2010-10-18 10:56:09 +08:00
assert((chunk->map[run_ind-map_bias].bits & ~PAGE_MASK)
== prun_size);
assert((chunk->map[run_ind-map_bias].bits & CHUNK_MAP_ALLOCATED)
== 0);
assert((chunk->map[run_ind-map_bias].bits & CHUNK_MAP_DIRTY)
== flag_dirty);
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
arena_avail_tree_remove(runs_avail,
&chunk->map[run_ind-map_bias]);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
size += prun_size;
Add assertions to run coalescing. Assert that the chunk map bits at the ends of the runs that participate in coalescing are self-consistent.
2010-10-18 10:56:09 +08:00
run_pages += prun_pages;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
chunk->map[run_ind-map_bias].bits = size |
(chunk->map[run_ind-map_bias].bits & CHUNK_MAP_FLAGS_MASK);
chunk->map[run_ind+run_pages-1-map_bias].bits = size |
(chunk->map[run_ind+run_pages-1-map_bias].bits &
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
CHUNK_MAP_FLAGS_MASK);
}
/* Insert into runs_avail, now that coalescing is complete. */
Fix arena bugs. Move part of arena_bin_lower_run() into the callers, since the conditions under which it should be called differ slightly between callers. Fix arena_chunk_purge() to omit run size in the last map entry for each run it temporarily allocates.
2010-10-18 11:57:30 +08:00
assert((chunk->map[run_ind-map_bias].bits & ~PAGE_MASK) ==
(chunk->map[run_ind+run_pages-1-map_bias].bits & ~PAGE_MASK));
assert((chunk->map[run_ind-map_bias].bits & CHUNK_MAP_DIRTY) ==
(chunk->map[run_ind+run_pages-1-map_bias].bits & CHUNK_MAP_DIRTY));
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
arena_avail_tree_insert(runs_avail, &chunk->map[run_ind-map_bias]);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
Fix arena chunk purge/dealloc race conditions. Fix arena_chunk_dealloc() to put the new spare in a consistent state before dropping the arena mutex to deallocate the previous spare. Fix arena_run_dalloc() to insert a newly dirtied chunk into the chunks_dirty list before potentially deallocating the chunk, so that dirty page accounting is self-consistent.
2010-04-14 11:53:21 +08:00
if (dirty) {
/*
* Insert into chunks_dirty before potentially calling
* arena_chunk_dealloc(), so that chunks_dirty and
* arena->ndirty are consistent.
*/
if (chunk->dirtied == false) {
ql_tail_insert(&arena->chunks_dirty, chunk, link_dirty);
chunk->dirtied = true;
}
}
Fix a chunk leak in chunk_alloc_mmap(). A missing 'else' in chunk_alloc_mmap() caused an extra chunk to be allocated every time the optimistic alignment path was entered, since the following block would always be executed immediately afterward. This chunk leak caused no increase in physical memory usage, but virtual memory could grow until resource exaustion caused allocation failures.
2010-01-28 10:27:09 +08:00
/*
* Deallocate chunk if it is now completely unused. The bit
* manipulation checks whether the first run is unallocated and extends
* to the end of the chunk.
*/
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
if ((chunk->map[0].bits & (~PAGE_MASK | CHUNK_MAP_ALLOCATED)) ==
arena_maxclass)
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
arena_chunk_dealloc(arena, chunk);
Fix a chunk leak in chunk_alloc_mmap(). A missing 'else' in chunk_alloc_mmap() caused an extra chunk to be allocated every time the optimistic alignment path was entered, since the following block would always be executed immediately afterward. This chunk leak caused no increase in physical memory usage, but virtual memory could grow until resource exaustion caused allocation failures.
2010-01-28 10:27:09 +08:00
/*
Fix arena chunk purge/dealloc race conditions. Fix arena_chunk_dealloc() to put the new spare in a consistent state before dropping the arena mutex to deallocate the previous spare. Fix arena_run_dalloc() to insert a newly dirtied chunk into the chunks_dirty list before potentially deallocating the chunk, so that dirty page accounting is self-consistent.
2010-04-14 11:53:21 +08:00
* It is okay to do dirty page processing here even if the chunk was
Fix a chunk leak in chunk_alloc_mmap(). A missing 'else' in chunk_alloc_mmap() caused an extra chunk to be allocated every time the optimistic alignment path was entered, since the following block would always be executed immediately afterward. This chunk leak caused no increase in physical memory usage, but virtual memory could grow until resource exaustion caused allocation failures.
2010-01-28 10:27:09 +08:00
* deallocated above, since in that case it is the spare. Waiting
* until after possible chunk deallocation to do dirty processing
* allows for an old spare to be fully deallocated, thus decreasing the
* chances of spuriously crossing the dirty page purging threshold.
*/
Fix arena chunk purge/dealloc race conditions. Fix arena_chunk_dealloc() to put the new spare in a consistent state before dropping the arena mutex to deallocate the previous spare. Fix arena_run_dalloc() to insert a newly dirtied chunk into the chunks_dirty list before potentially deallocating the chunk, so that dirty page accounting is self-consistent.
2010-04-14 11:53:21 +08:00
if (dirty)
Purge dirty pages without arena->lock.
2010-03-15 08:36:10 +08:00
arena_maybe_purge(arena);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
static void
arena_run_trim_head(arena_t *arena, arena_chunk_t *chunk, arena_run_t *run,
size_t oldsize, size_t newsize)
{
size_t pageind = ((uintptr_t)run - (uintptr_t)chunk) >> PAGE_SHIFT;
size_t head_npages = (oldsize - newsize) >> PAGE_SHIFT;
Fix numerous arena bugs. In arena_ralloc_large_grow(), update the map element for the end of the newly grown run, rather than the interior map element that was the beginning of the appended run. This is a long-standing bug, and it had the potential to cause massive corruption, but triggering it required roughly the following sequence of events: 1) Large in-place growing realloc(), with left-over space in the run that followed the large object. 2) Allocation of the remainder run left over from (1). 3) Deallocation of the remainder run *before* deallocation of the large run, with unfortunate interior map state left over from previous run allocation/deallocation activity, such that one or more pages of allocated memory would be treated as part of the remainder run during run coalescing. In summary, this was a bad bug, but it was difficult to trigger. In arena_bin_malloc_hard(), if another thread wins the race to allocate a bin run, dispose of the spare run via arena_bin_lower_run() rather than arena_run_dalloc(), since the run has already been prepared for use as a bin run. This bug has existed since March 14, 2010: e00572b384c81bd2aba57fac32f7077a34388915 mmap()/munmap() without arena->lock or bin->lock. Fix bugs in arena_dalloc_bin_run(), arena_trim_head(), arena_trim_tail(), and arena_ralloc_large_grow() that could cause the CHUNK_MAP_UNZEROED map bit to become corrupted. These are all long-standing bugs, but the chances of them actually causing problems was much lower before the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion. Fix a large run statistics regression in arena_ralloc_large_grow() that was introduced on September 17, 2010: 8e3c3c61b5bb676a705450708e7e79698cdc9e0c Add {,r,s,d}allocm(). Add debug code to validate that supposedly pre-zeroed memory really is.
2010-10-18 08:51:37 +08:00
size_t flag_dirty = chunk->map[pageind-map_bias].bits & CHUNK_MAP_DIRTY;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
assert(oldsize > newsize);
/*
* Update the chunk map so that arena_run_dalloc() can treat the
Fix numerous arena bugs. In arena_ralloc_large_grow(), update the map element for the end of the newly grown run, rather than the interior map element that was the beginning of the appended run. This is a long-standing bug, and it had the potential to cause massive corruption, but triggering it required roughly the following sequence of events: 1) Large in-place growing realloc(), with left-over space in the run that followed the large object. 2) Allocation of the remainder run left over from (1). 3) Deallocation of the remainder run *before* deallocation of the large run, with unfortunate interior map state left over from previous run allocation/deallocation activity, such that one or more pages of allocated memory would be treated as part of the remainder run during run coalescing. In summary, this was a bad bug, but it was difficult to trigger. In arena_bin_malloc_hard(), if another thread wins the race to allocate a bin run, dispose of the spare run via arena_bin_lower_run() rather than arena_run_dalloc(), since the run has already been prepared for use as a bin run. This bug has existed since March 14, 2010: e00572b384c81bd2aba57fac32f7077a34388915 mmap()/munmap() without arena->lock or bin->lock. Fix bugs in arena_dalloc_bin_run(), arena_trim_head(), arena_trim_tail(), and arena_ralloc_large_grow() that could cause the CHUNK_MAP_UNZEROED map bit to become corrupted. These are all long-standing bugs, but the chances of them actually causing problems was much lower before the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion. Fix a large run statistics regression in arena_ralloc_large_grow() that was introduced on September 17, 2010: 8e3c3c61b5bb676a705450708e7e79698cdc9e0c Add {,r,s,d}allocm(). Add debug code to validate that supposedly pre-zeroed memory really is.
2010-10-18 08:51:37 +08:00
* leading run as separately allocated. Set the last element of each
* run first, in case of single-page runs.
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
*/
Fix numerous arena bugs. In arena_ralloc_large_grow(), update the map element for the end of the newly grown run, rather than the interior map element that was the beginning of the appended run. This is a long-standing bug, and it had the potential to cause massive corruption, but triggering it required roughly the following sequence of events: 1) Large in-place growing realloc(), with left-over space in the run that followed the large object. 2) Allocation of the remainder run left over from (1). 3) Deallocation of the remainder run *before* deallocation of the large run, with unfortunate interior map state left over from previous run allocation/deallocation activity, such that one or more pages of allocated memory would be treated as part of the remainder run during run coalescing. In summary, this was a bad bug, but it was difficult to trigger. In arena_bin_malloc_hard(), if another thread wins the race to allocate a bin run, dispose of the spare run via arena_bin_lower_run() rather than arena_run_dalloc(), since the run has already been prepared for use as a bin run. This bug has existed since March 14, 2010: e00572b384c81bd2aba57fac32f7077a34388915 mmap()/munmap() without arena->lock or bin->lock. Fix bugs in arena_dalloc_bin_run(), arena_trim_head(), arena_trim_tail(), and arena_ralloc_large_grow() that could cause the CHUNK_MAP_UNZEROED map bit to become corrupted. These are all long-standing bugs, but the chances of them actually causing problems was much lower before the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion. Fix a large run statistics regression in arena_ralloc_large_grow() that was introduced on September 17, 2010: 8e3c3c61b5bb676a705450708e7e79698cdc9e0c Add {,r,s,d}allocm(). Add debug code to validate that supposedly pre-zeroed memory really is.
2010-10-18 08:51:37 +08:00
assert((chunk->map[pageind-map_bias].bits & CHUNK_MAP_LARGE) != 0);
assert((chunk->map[pageind-map_bias].bits & CHUNK_MAP_ALLOCATED) != 0);
chunk->map[pageind+head_npages-1-map_bias].bits = flag_dirty |
(chunk->map[pageind+head_npages-1-map_bias].bits &
CHUNK_MAP_UNZEROED) | CHUNK_MAP_LARGE | CHUNK_MAP_ALLOCATED;
chunk->map[pageind-map_bias].bits = (oldsize - newsize)
| flag_dirty | (chunk->map[pageind-map_bias].bits &
CHUNK_MAP_UNZEROED) | CHUNK_MAP_LARGE | CHUNK_MAP_ALLOCATED;
#ifdef JEMALLOC_DEBUG
{
size_t tail_npages = newsize >> PAGE_SHIFT;
assert((chunk->map[pageind+head_npages+tail_npages-1-map_bias]
.bits & ~PAGE_MASK) == 0);
assert((chunk->map[pageind+head_npages+tail_npages-1-map_bias]
.bits & CHUNK_MAP_DIRTY) == flag_dirty);
assert((chunk->map[pageind+head_npages+tail_npages-1-map_bias]
.bits & CHUNK_MAP_LARGE) != 0);
assert((chunk->map[pageind+head_npages+tail_npages-1-map_bias]
.bits & CHUNK_MAP_ALLOCATED) != 0);
}
#endif
chunk->map[pageind+head_npages-map_bias].bits = newsize | flag_dirty |
(chunk->map[pageind+head_npages-map_bias].bits &
CHUNK_MAP_FLAGS_MASK) | CHUNK_MAP_LARGE | CHUNK_MAP_ALLOCATED;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
arena_run_dalloc(arena, run, false);
}
static void
arena_run_trim_tail(arena_t *arena, arena_chunk_t *chunk, arena_run_t *run,
size_t oldsize, size_t newsize, bool dirty)
{
size_t pageind = ((uintptr_t)run - (uintptr_t)chunk) >> PAGE_SHIFT;
Fix numerous arena bugs. In arena_ralloc_large_grow(), update the map element for the end of the newly grown run, rather than the interior map element that was the beginning of the appended run. This is a long-standing bug, and it had the potential to cause massive corruption, but triggering it required roughly the following sequence of events: 1) Large in-place growing realloc(), with left-over space in the run that followed the large object. 2) Allocation of the remainder run left over from (1). 3) Deallocation of the remainder run *before* deallocation of the large run, with unfortunate interior map state left over from previous run allocation/deallocation activity, such that one or more pages of allocated memory would be treated as part of the remainder run during run coalescing. In summary, this was a bad bug, but it was difficult to trigger. In arena_bin_malloc_hard(), if another thread wins the race to allocate a bin run, dispose of the spare run via arena_bin_lower_run() rather than arena_run_dalloc(), since the run has already been prepared for use as a bin run. This bug has existed since March 14, 2010: e00572b384c81bd2aba57fac32f7077a34388915 mmap()/munmap() without arena->lock or bin->lock. Fix bugs in arena_dalloc_bin_run(), arena_trim_head(), arena_trim_tail(), and arena_ralloc_large_grow() that could cause the CHUNK_MAP_UNZEROED map bit to become corrupted. These are all long-standing bugs, but the chances of them actually causing problems was much lower before the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion. Fix a large run statistics regression in arena_ralloc_large_grow() that was introduced on September 17, 2010: 8e3c3c61b5bb676a705450708e7e79698cdc9e0c Add {,r,s,d}allocm(). Add debug code to validate that supposedly pre-zeroed memory really is.
2010-10-18 08:51:37 +08:00
size_t head_npages = newsize >> PAGE_SHIFT;
size_t tail_npages = (oldsize - newsize) >> PAGE_SHIFT;
size_t flag_dirty = chunk->map[pageind-map_bias].bits &
CHUNK_MAP_DIRTY;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
assert(oldsize > newsize);
/*
* Update the chunk map so that arena_run_dalloc() can treat the
Fix numerous arena bugs. In arena_ralloc_large_grow(), update the map element for the end of the newly grown run, rather than the interior map element that was the beginning of the appended run. This is a long-standing bug, and it had the potential to cause massive corruption, but triggering it required roughly the following sequence of events: 1) Large in-place growing realloc(), with left-over space in the run that followed the large object. 2) Allocation of the remainder run left over from (1). 3) Deallocation of the remainder run *before* deallocation of the large run, with unfortunate interior map state left over from previous run allocation/deallocation activity, such that one or more pages of allocated memory would be treated as part of the remainder run during run coalescing. In summary, this was a bad bug, but it was difficult to trigger. In arena_bin_malloc_hard(), if another thread wins the race to allocate a bin run, dispose of the spare run via arena_bin_lower_run() rather than arena_run_dalloc(), since the run has already been prepared for use as a bin run. This bug has existed since March 14, 2010: e00572b384c81bd2aba57fac32f7077a34388915 mmap()/munmap() without arena->lock or bin->lock. Fix bugs in arena_dalloc_bin_run(), arena_trim_head(), arena_trim_tail(), and arena_ralloc_large_grow() that could cause the CHUNK_MAP_UNZEROED map bit to become corrupted. These are all long-standing bugs, but the chances of them actually causing problems was much lower before the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion. Fix a large run statistics regression in arena_ralloc_large_grow() that was introduced on September 17, 2010: 8e3c3c61b5bb676a705450708e7e79698cdc9e0c Add {,r,s,d}allocm(). Add debug code to validate that supposedly pre-zeroed memory really is.
2010-10-18 08:51:37 +08:00
* trailing run as separately allocated. Set the last element of each
* run first, in case of single-page runs.
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
*/
Fix numerous arena bugs. In arena_ralloc_large_grow(), update the map element for the end of the newly grown run, rather than the interior map element that was the beginning of the appended run. This is a long-standing bug, and it had the potential to cause massive corruption, but triggering it required roughly the following sequence of events: 1) Large in-place growing realloc(), with left-over space in the run that followed the large object. 2) Allocation of the remainder run left over from (1). 3) Deallocation of the remainder run *before* deallocation of the large run, with unfortunate interior map state left over from previous run allocation/deallocation activity, such that one or more pages of allocated memory would be treated as part of the remainder run during run coalescing. In summary, this was a bad bug, but it was difficult to trigger. In arena_bin_malloc_hard(), if another thread wins the race to allocate a bin run, dispose of the spare run via arena_bin_lower_run() rather than arena_run_dalloc(), since the run has already been prepared for use as a bin run. This bug has existed since March 14, 2010: e00572b384c81bd2aba57fac32f7077a34388915 mmap()/munmap() without arena->lock or bin->lock. Fix bugs in arena_dalloc_bin_run(), arena_trim_head(), arena_trim_tail(), and arena_ralloc_large_grow() that could cause the CHUNK_MAP_UNZEROED map bit to become corrupted. These are all long-standing bugs, but the chances of them actually causing problems was much lower before the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion. Fix a large run statistics regression in arena_ralloc_large_grow() that was introduced on September 17, 2010: 8e3c3c61b5bb676a705450708e7e79698cdc9e0c Add {,r,s,d}allocm(). Add debug code to validate that supposedly pre-zeroed memory really is.
2010-10-18 08:51:37 +08:00
assert((chunk->map[pageind-map_bias].bits & CHUNK_MAP_LARGE) != 0);
assert((chunk->map[pageind-map_bias].bits & CHUNK_MAP_ALLOCATED) != 0);
chunk->map[pageind+head_npages-1-map_bias].bits = flag_dirty |
(chunk->map[pageind+head_npages-1-map_bias].bits &
CHUNK_MAP_UNZEROED) | CHUNK_MAP_LARGE | CHUNK_MAP_ALLOCATED;
chunk->map[pageind-map_bias].bits = newsize | flag_dirty |
(chunk->map[pageind-map_bias].bits & CHUNK_MAP_UNZEROED) |
CHUNK_MAP_LARGE | CHUNK_MAP_ALLOCATED;
assert((chunk->map[pageind+head_npages+tail_npages-1-map_bias].bits &
~PAGE_MASK) == 0);
assert((chunk->map[pageind+head_npages+tail_npages-1-map_bias].bits &
CHUNK_MAP_LARGE) != 0);
assert((chunk->map[pageind+head_npages+tail_npages-1-map_bias].bits &
CHUNK_MAP_ALLOCATED) != 0);
chunk->map[pageind+head_npages+tail_npages-1-map_bias].bits =
flag_dirty |
(chunk->map[pageind+head_npages+tail_npages-1-map_bias].bits &
CHUNK_MAP_UNZEROED) | CHUNK_MAP_LARGE | CHUNK_MAP_ALLOCATED;
chunk->map[pageind+head_npages-map_bias].bits = (oldsize - newsize) |
flag_dirty | (chunk->map[pageind+head_npages-map_bias].bits &
CHUNK_MAP_UNZEROED) | CHUNK_MAP_LARGE | CHUNK_MAP_ALLOCATED;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
arena_run_dalloc(arena, (arena_run_t *)((uintptr_t)run + newsize),
dirty);
}
static arena_run_t *
arena_bin_nonfull_run_get(arena_t *arena, arena_bin_t *bin)
{
arena_chunk_map_t *mapelm;
arena_run_t *run;
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
size_t binind;
arena_bin_info_t *bin_info;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
/* Look for a usable run. */
mapelm = arena_run_tree_first(&bin->runs);
if (mapelm != NULL) {
arena_chunk_t *chunk;
size_t pageind;
/* run is guaranteed to have available space. */
arena_run_tree_remove(&bin->runs, mapelm);
chunk = (arena_chunk_t *)CHUNK_ADDR2BASE(mapelm);
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
pageind = ((((uintptr_t)mapelm - (uintptr_t)chunk->map) /
sizeof(arena_chunk_map_t))) + map_bias;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
run = (arena_run_t *)((uintptr_t)chunk + (uintptr_t)((pageind -
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
(mapelm->bits >> PAGE_SHIFT))
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
<< PAGE_SHIFT));
#ifdef JEMALLOC_STATS
bin->stats.reruns++;
#endif
return (run);
}
/* No existing runs have any space available. */
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
binind = arena_bin_index(arena, bin);
bin_info = &arena_bin_info[binind];
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
/* Allocate a new run. */
mmap()/munmap() without arena->lock or bin->lock.
2010-03-15 10:43:56 +08:00
malloc_mutex_unlock(&bin->lock);
Fix a run initialization race condition. Initialize small run header before dropping arena->lock, arena_chunk_purge() relies on valid small run headers during run iteration. Add some assertions.
2010-03-16 13:25:23 +08:00
/******************************/
Push locks into arena bins. For bin-related allocation, protect data structures with bin locks rather than arena locks. Arena locks remain for run allocation/deallocation and other miscellaneous operations. Restructure statistics counters to maintain per bin allocated/nmalloc/ndalloc, but continue to provide arena-wide statistics via aggregation in the ctl code.
2010-03-14 12:32:56 +08:00
malloc_mutex_lock(&arena->lock);
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
run = arena_run_alloc(arena, bin_info->run_size, false, false);
mmap()/munmap() without arena->lock or bin->lock.
2010-03-15 10:43:56 +08:00
if (run != NULL) {
Use bitmaps to track small regions. The previous free list implementation, which embedded singly linked lists in available regions, had the unfortunate side effect of causing many cache misses during thread cache fills. Fix this in two places: - arena_run_t: Use a new bitmap implementation to track which regions are available. Furthermore, revert to preferring the lowest available region (as jemalloc did with its old bitmap-based approach). - tcache_t: Move read-only tcache_bin_t metadata into tcache_bin_info_t, and add a contiguous array of pointers to tcache_t in order to track cached objects. This substantially increases the size of tcache_t, but results in much higher data locality for common tcache operations. As a side benefit, it is again possible to efficiently flush the least recently used cached objects, so this change changes flushing from MRU to LRU. The new bitmap implementation uses a multi-level summary approach to make finding the lowest available region very fast. In practice, bitmaps only have one or two levels, though the implementation is general enough to handle extremely large bitmaps, mainly so that large page sizes can still be entertained. Fix tcache_bin_flush_large() to always flush statistics, in the same way that tcache_bin_flush_small() was recently fixed. Use JEMALLOC_DEBUG rather than NDEBUG. Add dassert(), and use it for debug-only asserts.
2011-03-17 01:30:13 +08:00
bitmap_t *bitmap = (bitmap_t *)((uintptr_t)run +
(uintptr_t)bin_info->bitmap_offset);
mmap()/munmap() without arena->lock or bin->lock.
2010-03-15 10:43:56 +08:00
/* Initialize run internals. */
run->bin = bin;
Use bitmaps to track small regions. The previous free list implementation, which embedded singly linked lists in available regions, had the unfortunate side effect of causing many cache misses during thread cache fills. Fix this in two places: - arena_run_t: Use a new bitmap implementation to track which regions are available. Furthermore, revert to preferring the lowest available region (as jemalloc did with its old bitmap-based approach). - tcache_t: Move read-only tcache_bin_t metadata into tcache_bin_info_t, and add a contiguous array of pointers to tcache_t in order to track cached objects. This substantially increases the size of tcache_t, but results in much higher data locality for common tcache operations. As a side benefit, it is again possible to efficiently flush the least recently used cached objects, so this change changes flushing from MRU to LRU. The new bitmap implementation uses a multi-level summary approach to make finding the lowest available region very fast. In practice, bitmaps only have one or two levels, though the implementation is general enough to handle extremely large bitmaps, mainly so that large page sizes can still be entertained. Fix tcache_bin_flush_large() to always flush statistics, in the same way that tcache_bin_flush_small() was recently fixed. Use JEMALLOC_DEBUG rather than NDEBUG. Add dassert(), and use it for debug-only asserts.
2011-03-17 01:30:13 +08:00
run->nextind = 0;
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
run->nfree = bin_info->nregs;
Use bitmaps to track small regions. The previous free list implementation, which embedded singly linked lists in available regions, had the unfortunate side effect of causing many cache misses during thread cache fills. Fix this in two places: - arena_run_t: Use a new bitmap implementation to track which regions are available. Furthermore, revert to preferring the lowest available region (as jemalloc did with its old bitmap-based approach). - tcache_t: Move read-only tcache_bin_t metadata into tcache_bin_info_t, and add a contiguous array of pointers to tcache_t in order to track cached objects. This substantially increases the size of tcache_t, but results in much higher data locality for common tcache operations. As a side benefit, it is again possible to efficiently flush the least recently used cached objects, so this change changes flushing from MRU to LRU. The new bitmap implementation uses a multi-level summary approach to make finding the lowest available region very fast. In practice, bitmaps only have one or two levels, though the implementation is general enough to handle extremely large bitmaps, mainly so that large page sizes can still be entertained. Fix tcache_bin_flush_large() to always flush statistics, in the same way that tcache_bin_flush_small() was recently fixed. Use JEMALLOC_DEBUG rather than NDEBUG. Add dassert(), and use it for debug-only asserts.
2011-03-17 01:30:13 +08:00
bitmap_init(bitmap, &bin_info->bitmap_info);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
#ifdef JEMALLOC_DEBUG
mmap()/munmap() without arena->lock or bin->lock.
2010-03-15 10:43:56 +08:00
run->magic = ARENA_RUN_MAGIC;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
#endif
Fix a run initialization race condition. Initialize small run header before dropping arena->lock, arena_chunk_purge() relies on valid small run headers during run iteration. Add some assertions.
2010-03-16 13:25:23 +08:00
}
malloc_mutex_unlock(&arena->lock);
/********************************/
malloc_mutex_lock(&bin->lock);
if (run != NULL) {
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
#ifdef JEMALLOC_STATS
mmap()/munmap() without arena->lock or bin->lock.
2010-03-15 10:43:56 +08:00
bin->stats.nruns++;
bin->stats.curruns++;
if (bin->stats.curruns > bin->stats.highruns)
bin->stats.highruns = bin->stats.curruns;
#endif
return (run);
}
/*
* arena_run_alloc() failed, but another thread may have made
Fix numerous arena bugs. In arena_ralloc_large_grow(), update the map element for the end of the newly grown run, rather than the interior map element that was the beginning of the appended run. This is a long-standing bug, and it had the potential to cause massive corruption, but triggering it required roughly the following sequence of events: 1) Large in-place growing realloc(), with left-over space in the run that followed the large object. 2) Allocation of the remainder run left over from (1). 3) Deallocation of the remainder run *before* deallocation of the large run, with unfortunate interior map state left over from previous run allocation/deallocation activity, such that one or more pages of allocated memory would be treated as part of the remainder run during run coalescing. In summary, this was a bad bug, but it was difficult to trigger. In arena_bin_malloc_hard(), if another thread wins the race to allocate a bin run, dispose of the spare run via arena_bin_lower_run() rather than arena_run_dalloc(), since the run has already been prepared for use as a bin run. This bug has existed since March 14, 2010: e00572b384c81bd2aba57fac32f7077a34388915 mmap()/munmap() without arena->lock or bin->lock. Fix bugs in arena_dalloc_bin_run(), arena_trim_head(), arena_trim_tail(), and arena_ralloc_large_grow() that could cause the CHUNK_MAP_UNZEROED map bit to become corrupted. These are all long-standing bugs, but the chances of them actually causing problems was much lower before the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion. Fix a large run statistics regression in arena_ralloc_large_grow() that was introduced on September 17, 2010: 8e3c3c61b5bb676a705450708e7e79698cdc9e0c Add {,r,s,d}allocm(). Add debug code to validate that supposedly pre-zeroed memory really is.
2010-10-18 08:51:37 +08:00
* sufficient memory available while this one dropped bin->lock above,
mmap()/munmap() without arena->lock or bin->lock.
2010-03-15 10:43:56 +08:00
* so search one more time.
*/
mapelm = arena_run_tree_first(&bin->runs);
if (mapelm != NULL) {
arena_chunk_t *chunk;
size_t pageind;
/* run is guaranteed to have available space. */
arena_run_tree_remove(&bin->runs, mapelm);
chunk = (arena_chunk_t *)CHUNK_ADDR2BASE(mapelm);
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
pageind = ((((uintptr_t)mapelm - (uintptr_t)chunk->map) /
sizeof(arena_chunk_map_t))) + map_bias;
mmap()/munmap() without arena->lock or bin->lock.
2010-03-15 10:43:56 +08:00
run = (arena_run_t *)((uintptr_t)chunk + (uintptr_t)((pageind -
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
(mapelm->bits >> PAGE_SHIFT))
mmap()/munmap() without arena->lock or bin->lock.
2010-03-15 10:43:56 +08:00
<< PAGE_SHIFT));
#ifdef JEMALLOC_STATS
bin->stats.reruns++;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
#endif
mmap()/munmap() without arena->lock or bin->lock.
2010-03-15 10:43:56 +08:00
return (run);
}
return (NULL);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
Simplify small object allocation/deallocation. Use chained run free lists instead of bitmaps to track free objects within small runs. Remove reference counting for small object run pages.
2010-03-14 05:41:58 +08:00
/* Re-fill bin->runcur, then call arena_run_reg_alloc(). */
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
static void *
arena_bin_malloc_hard(arena_t *arena, arena_bin_t *bin)
{
mmap()/munmap() without arena->lock or bin->lock.
2010-03-15 10:43:56 +08:00
void *ret;
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
size_t binind;
arena_bin_info_t *bin_info;
mmap()/munmap() without arena->lock or bin->lock.
2010-03-15 10:43:56 +08:00
arena_run_t *run;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
binind = arena_bin_index(arena, bin);
bin_info = &arena_bin_info[binind];
mmap()/munmap() without arena->lock or bin->lock.
2010-03-15 10:43:56 +08:00
bin->runcur = NULL;
run = arena_bin_nonfull_run_get(arena, bin);
if (bin->runcur != NULL && bin->runcur->nfree > 0) {
/*
* Another thread updated runcur while this one ran without the
* bin lock in arena_bin_nonfull_run_get().
*/
Use bitmaps to track small regions. The previous free list implementation, which embedded singly linked lists in available regions, had the unfortunate side effect of causing many cache misses during thread cache fills. Fix this in two places: - arena_run_t: Use a new bitmap implementation to track which regions are available. Furthermore, revert to preferring the lowest available region (as jemalloc did with its old bitmap-based approach). - tcache_t: Move read-only tcache_bin_t metadata into tcache_bin_info_t, and add a contiguous array of pointers to tcache_t in order to track cached objects. This substantially increases the size of tcache_t, but results in much higher data locality for common tcache operations. As a side benefit, it is again possible to efficiently flush the least recently used cached objects, so this change changes flushing from MRU to LRU. The new bitmap implementation uses a multi-level summary approach to make finding the lowest available region very fast. In practice, bitmaps only have one or two levels, though the implementation is general enough to handle extremely large bitmaps, mainly so that large page sizes can still be entertained. Fix tcache_bin_flush_large() to always flush statistics, in the same way that tcache_bin_flush_small() was recently fixed. Use JEMALLOC_DEBUG rather than NDEBUG. Add dassert(), and use it for debug-only asserts.
2011-03-17 01:30:13 +08:00
dassert(bin->runcur->magic == ARENA_RUN_MAGIC);
mmap()/munmap() without arena->lock or bin->lock.
2010-03-15 10:43:56 +08:00
assert(bin->runcur->nfree > 0);
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
ret = arena_run_reg_alloc(bin->runcur, bin_info);
mmap()/munmap() without arena->lock or bin->lock.
2010-03-15 10:43:56 +08:00
if (run != NULL) {
Fix numerous arena bugs. In arena_ralloc_large_grow(), update the map element for the end of the newly grown run, rather than the interior map element that was the beginning of the appended run. This is a long-standing bug, and it had the potential to cause massive corruption, but triggering it required roughly the following sequence of events: 1) Large in-place growing realloc(), with left-over space in the run that followed the large object. 2) Allocation of the remainder run left over from (1). 3) Deallocation of the remainder run *before* deallocation of the large run, with unfortunate interior map state left over from previous run allocation/deallocation activity, such that one or more pages of allocated memory would be treated as part of the remainder run during run coalescing. In summary, this was a bad bug, but it was difficult to trigger. In arena_bin_malloc_hard(), if another thread wins the race to allocate a bin run, dispose of the spare run via arena_bin_lower_run() rather than arena_run_dalloc(), since the run has already been prepared for use as a bin run. This bug has existed since March 14, 2010: e00572b384c81bd2aba57fac32f7077a34388915 mmap()/munmap() without arena->lock or bin->lock. Fix bugs in arena_dalloc_bin_run(), arena_trim_head(), arena_trim_tail(), and arena_ralloc_large_grow() that could cause the CHUNK_MAP_UNZEROED map bit to become corrupted. These are all long-standing bugs, but the chances of them actually causing problems was much lower before the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion. Fix a large run statistics regression in arena_ralloc_large_grow() that was introduced on September 17, 2010: 8e3c3c61b5bb676a705450708e7e79698cdc9e0c Add {,r,s,d}allocm(). Add debug code to validate that supposedly pre-zeroed memory really is.
2010-10-18 08:51:37 +08:00
arena_chunk_t *chunk;
/*
* arena_run_alloc() may have allocated run, or it may
Use bitmaps to track small regions. The previous free list implementation, which embedded singly linked lists in available regions, had the unfortunate side effect of causing many cache misses during thread cache fills. Fix this in two places: - arena_run_t: Use a new bitmap implementation to track which regions are available. Furthermore, revert to preferring the lowest available region (as jemalloc did with its old bitmap-based approach). - tcache_t: Move read-only tcache_bin_t metadata into tcache_bin_info_t, and add a contiguous array of pointers to tcache_t in order to track cached objects. This substantially increases the size of tcache_t, but results in much higher data locality for common tcache operations. As a side benefit, it is again possible to efficiently flush the least recently used cached objects, so this change changes flushing from MRU to LRU. The new bitmap implementation uses a multi-level summary approach to make finding the lowest available region very fast. In practice, bitmaps only have one or two levels, though the implementation is general enough to handle extremely large bitmaps, mainly so that large page sizes can still be entertained. Fix tcache_bin_flush_large() to always flush statistics, in the same way that tcache_bin_flush_small() was recently fixed. Use JEMALLOC_DEBUG rather than NDEBUG. Add dassert(), and use it for debug-only asserts.
2011-03-17 01:30:13 +08:00
* have pulled run from the bin's run tree. Therefore
Fix numerous arena bugs. In arena_ralloc_large_grow(), update the map element for the end of the newly grown run, rather than the interior map element that was the beginning of the appended run. This is a long-standing bug, and it had the potential to cause massive corruption, but triggering it required roughly the following sequence of events: 1) Large in-place growing realloc(), with left-over space in the run that followed the large object. 2) Allocation of the remainder run left over from (1). 3) Deallocation of the remainder run *before* deallocation of the large run, with unfortunate interior map state left over from previous run allocation/deallocation activity, such that one or more pages of allocated memory would be treated as part of the remainder run during run coalescing. In summary, this was a bad bug, but it was difficult to trigger. In arena_bin_malloc_hard(), if another thread wins the race to allocate a bin run, dispose of the spare run via arena_bin_lower_run() rather than arena_run_dalloc(), since the run has already been prepared for use as a bin run. This bug has existed since March 14, 2010: e00572b384c81bd2aba57fac32f7077a34388915 mmap()/munmap() without arena->lock or bin->lock. Fix bugs in arena_dalloc_bin_run(), arena_trim_head(), arena_trim_tail(), and arena_ralloc_large_grow() that could cause the CHUNK_MAP_UNZEROED map bit to become corrupted. These are all long-standing bugs, but the chances of them actually causing problems was much lower before the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion. Fix a large run statistics regression in arena_ralloc_large_grow() that was introduced on September 17, 2010: 8e3c3c61b5bb676a705450708e7e79698cdc9e0c Add {,r,s,d}allocm(). Add debug code to validate that supposedly pre-zeroed memory really is.
2010-10-18 08:51:37 +08:00
* it is unsafe to make any assumptions about how run
* has previously been used, and arena_bin_lower_run()
* must be called, as if a region were just deallocated
* from the run.
*/
chunk = (arena_chunk_t *)CHUNK_ADDR2BASE(run);
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
if (run->nfree == bin_info->nregs)
Fix arena bugs. Move part of arena_bin_lower_run() into the callers, since the conditions under which it should be called differ slightly between callers. Fix arena_chunk_purge() to omit run size in the last map entry for each run it temporarily allocates.
2010-10-18 11:57:30 +08:00
arena_dalloc_bin_run(arena, chunk, run, bin);
else
arena_bin_lower_run(arena, chunk, run, bin);
mmap()/munmap() without arena->lock or bin->lock.
2010-03-15 10:43:56 +08:00
}
return (ret);
}
if (run == NULL)
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
return (NULL);
mmap()/munmap() without arena->lock or bin->lock.
2010-03-15 10:43:56 +08:00
bin->runcur = run;
Use bitmaps to track small regions. The previous free list implementation, which embedded singly linked lists in available regions, had the unfortunate side effect of causing many cache misses during thread cache fills. Fix this in two places: - arena_run_t: Use a new bitmap implementation to track which regions are available. Furthermore, revert to preferring the lowest available region (as jemalloc did with its old bitmap-based approach). - tcache_t: Move read-only tcache_bin_t metadata into tcache_bin_info_t, and add a contiguous array of pointers to tcache_t in order to track cached objects. This substantially increases the size of tcache_t, but results in much higher data locality for common tcache operations. As a side benefit, it is again possible to efficiently flush the least recently used cached objects, so this change changes flushing from MRU to LRU. The new bitmap implementation uses a multi-level summary approach to make finding the lowest available region very fast. In practice, bitmaps only have one or two levels, though the implementation is general enough to handle extremely large bitmaps, mainly so that large page sizes can still be entertained. Fix tcache_bin_flush_large() to always flush statistics, in the same way that tcache_bin_flush_small() was recently fixed. Use JEMALLOC_DEBUG rather than NDEBUG. Add dassert(), and use it for debug-only asserts.
2011-03-17 01:30:13 +08:00
dassert(bin->runcur->magic == ARENA_RUN_MAGIC);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
assert(bin->runcur->nfree > 0);
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
return (arena_run_reg_alloc(bin->runcur, bin_info));
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
Push locks into arena bins. For bin-related allocation, protect data structures with bin locks rather than arena locks. Arena locks remain for run allocation/deallocation and other miscellaneous operations. Restructure statistics counters to maintain per bin allocated/nmalloc/ndalloc, but continue to provide arena-wide statistics via aggregation in the ctl code.
2010-03-14 12:32:56 +08:00
#ifdef JEMALLOC_PROF
void
arena_prof_accum(arena_t *arena, uint64_t accumbytes)
{
if (prof_interval != 0) {
arena->prof_accumbytes += accumbytes;
if (arena->prof_accumbytes >= prof_interval) {
prof_idump();
arena->prof_accumbytes -= prof_interval;
}
}
}
#endif
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
#ifdef JEMALLOC_TCACHE
void
Remove medium size classes. Remove medium size classes, because concurrent dirty page purging is no longer capable of purging inactive dirty pages inside active runs (due to recent arena/bin locking changes). Enhance tcache to support caching large objects, so that the same range of size classes is still cached, despite the removal of medium size class support.
2010-03-18 07:27:39 +08:00
arena_tcache_fill_small(arena_t *arena, tcache_bin_t *tbin, size_t binind
Implement interval-based heap profile dumping. Add mallctl interfaces for profiling parameters. Fix a file descriptor leak in heap profile dumping.
2010-02-12 05:19:21 +08:00
# ifdef JEMALLOC_PROF
, uint64_t prof_accumbytes
# endif
)
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
{
unsigned i, nfill;
arena_bin_t *bin;
arena_run_t *run;
void *ptr;
assert(tbin->ncached == 0);
Implement interval-based heap profile dumping. Add mallctl interfaces for profiling parameters. Fix a file descriptor leak in heap profile dumping.
2010-02-12 05:19:21 +08:00
#ifdef JEMALLOC_PROF
Push locks into arena bins. For bin-related allocation, protect data structures with bin locks rather than arena locks. Arena locks remain for run allocation/deallocation and other miscellaneous operations. Restructure statistics counters to maintain per bin allocated/nmalloc/ndalloc, but continue to provide arena-wide statistics via aggregation in the ctl code.
2010-03-14 12:32:56 +08:00
malloc_mutex_lock(&arena->lock);
Implement interval-based heap profile dumping. Add mallctl interfaces for profiling parameters. Fix a file descriptor leak in heap profile dumping.
2010-02-12 05:19:21 +08:00
arena_prof_accum(arena, prof_accumbytes);
Push locks into arena bins. For bin-related allocation, protect data structures with bin locks rather than arena locks. Arena locks remain for run allocation/deallocation and other miscellaneous operations. Restructure statistics counters to maintain per bin allocated/nmalloc/ndalloc, but continue to provide arena-wide statistics via aggregation in the ctl code.
2010-03-14 12:32:56 +08:00
malloc_mutex_unlock(&arena->lock);
Implement interval-based heap profile dumping. Add mallctl interfaces for profiling parameters. Fix a file descriptor leak in heap profile dumping.
2010-02-12 05:19:21 +08:00
#endif
Fix a run initialization race condition. Initialize small run header before dropping arena->lock, arena_chunk_purge() relies on valid small run headers during run iteration. Add some assertions.
2010-03-16 13:25:23 +08:00
bin = &arena->bins[binind];
malloc_mutex_lock(&bin->lock);
Dynamically adjust tcache fill count. Dynamically adjust tcache fill count (number of objects allocated per tcache refill) such that if GC has to flush inactive objects, the fill count gradually decreases. Conversely, if refills occur while the fill count is depressed, the fill count gradually increases back to its maximum value.
2011-03-21 15:18:17 +08:00
for (i = 0, nfill = (tcache_bin_info[binind].ncached_max >>
tbin->lg_fill_div); i < nfill; i++) {
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
if ((run = bin->runcur) != NULL && run->nfree > 0)
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
ptr = arena_run_reg_alloc(run, &arena_bin_info[binind]);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
else
ptr = arena_bin_malloc_hard(arena, bin);
Simplify tcache object caching. Use chains of cached objects, rather than using arrays of pointers. Since tcache_bin_t is no longer dynamically sized, convert tcache_t's tbin to an array of structures, rather than an array of pointers. This implicitly removes tcache_bin_{create,destroy}(), which further simplifies the fast path for malloc/free. Use cacheline alignment for tcache_t allocations. Remove runtime configuration option for number of tcache bin slots, and replace it with a boolean option for enabling/disabling tcache. Limit the number of tcache objects to the lesser of TCACHE_NSLOTS_MAX and 2X the number of regions per run for the size class. For GC-triggered flush, discard 3/4 of the objects below the low water mark, rather than 1/2.
2010-03-08 07:34:14 +08:00
if (ptr == NULL)
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
break;
Reverse tcache fill order. Refill the thread cache such that low regions get used first. This fixes a regression due to the recent transition to bitmap-based region management.
2011-03-19 01:53:15 +08:00
/* Insert such that low regions get used first. */
tbin->avail[nfill - 1 - i] = ptr;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
#ifdef JEMALLOC_STATS
Dynamically adjust tcache fill count. Dynamically adjust tcache fill count (number of objects allocated per tcache refill) such that if GC has to flush inactive objects, the fill count gradually decreases. Conversely, if refills occur while the fill count is depressed, the fill count gradually increases back to its maximum value.
2011-03-21 15:18:17 +08:00
bin->stats.allocated += i * arena_bin_info[binind].reg_size;
Push locks into arena bins. For bin-related allocation, protect data structures with bin locks rather than arena locks. Arena locks remain for run allocation/deallocation and other miscellaneous operations. Restructure statistics counters to maintain per bin allocated/nmalloc/ndalloc, but continue to provide arena-wide statistics via aggregation in the ctl code.
2010-03-14 12:32:56 +08:00
bin->stats.nmalloc += i;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
bin->stats.nrequests += tbin->tstats.nrequests;
Push locks into arena bins. For bin-related allocation, protect data structures with bin locks rather than arena locks. Arena locks remain for run allocation/deallocation and other miscellaneous operations. Restructure statistics counters to maintain per bin allocated/nmalloc/ndalloc, but continue to provide arena-wide statistics via aggregation in the ctl code.
2010-03-14 12:32:56 +08:00
bin->stats.nfills++;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
tbin->tstats.nrequests = 0;
#endif
Push locks into arena bins. For bin-related allocation, protect data structures with bin locks rather than arena locks. Arena locks remain for run allocation/deallocation and other miscellaneous operations. Restructure statistics counters to maintain per bin allocated/nmalloc/ndalloc, but continue to provide arena-wide statistics via aggregation in the ctl code.
2010-03-14 12:32:56 +08:00
malloc_mutex_unlock(&bin->lock);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
tbin->ncached = i;
}
#endif
void *
arena_malloc_small(arena_t *arena, size_t size, bool zero)
{
void *ret;
arena_bin_t *bin;
arena_run_t *run;
size_t binind;
Reduce size of small_size2bin lookup table. Convert all direct small_size2bin[...] accesses to SMALL_SIZE2BIN(...) macro calls, and use a couple of cheap math operations to allow compacting the table by 4X or 8X, on 32- and 64-bit systems, respectively.
2011-03-07 14:56:36 +08:00
binind = SMALL_SIZE2BIN(size);
Remove medium size classes. Remove medium size classes, because concurrent dirty page purging is no longer capable of purging inactive dirty pages inside active runs (due to recent arena/bin locking changes). Enhance tcache to support caching large objects, so that the same range of size classes is still cached, despite the removal of medium size class support.
2010-03-18 07:27:39 +08:00
assert(binind < nbins);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
bin = &arena->bins[binind];
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
size = arena_bin_info[binind].reg_size;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
Push locks into arena bins. For bin-related allocation, protect data structures with bin locks rather than arena locks. Arena locks remain for run allocation/deallocation and other miscellaneous operations. Restructure statistics counters to maintain per bin allocated/nmalloc/ndalloc, but continue to provide arena-wide statistics via aggregation in the ctl code.
2010-03-14 12:32:56 +08:00
malloc_mutex_lock(&bin->lock);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
if ((run = bin->runcur) != NULL && run->nfree > 0)
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
ret = arena_run_reg_alloc(run, &arena_bin_info[binind]);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
else
ret = arena_bin_malloc_hard(arena, bin);
if (ret == NULL) {
Push locks into arena bins. For bin-related allocation, protect data structures with bin locks rather than arena locks. Arena locks remain for run allocation/deallocation and other miscellaneous operations. Restructure statistics counters to maintain per bin allocated/nmalloc/ndalloc, but continue to provide arena-wide statistics via aggregation in the ctl code.
2010-03-14 12:32:56 +08:00
malloc_mutex_unlock(&bin->lock);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
return (NULL);
}
#ifdef JEMALLOC_STATS
Push locks into arena bins. For bin-related allocation, protect data structures with bin locks rather than arena locks. Arena locks remain for run allocation/deallocation and other miscellaneous operations. Restructure statistics counters to maintain per bin allocated/nmalloc/ndalloc, but continue to provide arena-wide statistics via aggregation in the ctl code.
2010-03-14 12:32:56 +08:00
bin->stats.allocated += size;
bin->stats.nmalloc++;
bin->stats.nrequests++;
Implement interval-based heap profile dumping. Add mallctl interfaces for profiling parameters. Fix a file descriptor leak in heap profile dumping.
2010-02-12 05:19:21 +08:00
#endif
Push locks into arena bins. For bin-related allocation, protect data structures with bin locks rather than arena locks. Arena locks remain for run allocation/deallocation and other miscellaneous operations. Restructure statistics counters to maintain per bin allocated/nmalloc/ndalloc, but continue to provide arena-wide statistics via aggregation in the ctl code.
2010-03-14 12:32:56 +08:00
malloc_mutex_unlock(&bin->lock);
Implement interval-based heap profile dumping. Add mallctl interfaces for profiling parameters. Fix a file descriptor leak in heap profile dumping.
2010-02-12 05:19:21 +08:00
#ifdef JEMALLOC_PROF
Push locks into arena bins. For bin-related allocation, protect data structures with bin locks rather than arena locks. Arena locks remain for run allocation/deallocation and other miscellaneous operations. Restructure statistics counters to maintain per bin allocated/nmalloc/ndalloc, but continue to provide arena-wide statistics via aggregation in the ctl code.
2010-03-14 12:32:56 +08:00
if (isthreaded == false) {
malloc_mutex_lock(&arena->lock);
Implement interval-based heap profile dumping. Add mallctl interfaces for profiling parameters. Fix a file descriptor leak in heap profile dumping.
2010-02-12 05:19:21 +08:00
arena_prof_accum(arena, size);
Push locks into arena bins. For bin-related allocation, protect data structures with bin locks rather than arena locks. Arena locks remain for run allocation/deallocation and other miscellaneous operations. Restructure statistics counters to maintain per bin allocated/nmalloc/ndalloc, but continue to provide arena-wide statistics via aggregation in the ctl code.
2010-03-14 12:32:56 +08:00
malloc_mutex_unlock(&arena->lock);
}
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
#endif
if (zero == false) {
#ifdef JEMALLOC_FILL
if (opt_junk)
memset(ret, 0xa5, size);
else if (opt_zero)
memset(ret, 0, size);
#endif
} else
memset(ret, 0, size);
return (ret);
}
void *
arena_malloc_large(arena_t *arena, size_t size, bool zero)
{
void *ret;
/* Large allocation. */
size = PAGE_CEILING(size);
malloc_mutex_lock(&arena->lock);
ret = (void *)arena_run_alloc(arena, size, true, zero);
if (ret == NULL) {
malloc_mutex_unlock(&arena->lock);
return (NULL);
}
#ifdef JEMALLOC_STATS
arena->stats.nmalloc_large++;
Remove medium size classes. Remove medium size classes, because concurrent dirty page purging is no longer capable of purging inactive dirty pages inside active runs (due to recent arena/bin locking changes). Enhance tcache to support caching large objects, so that the same range of size classes is still cached, despite the removal of medium size class support.
2010-03-18 07:27:39 +08:00
arena->stats.nrequests_large++;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
arena->stats.allocated_large += size;
Remove medium size classes. Remove medium size classes, because concurrent dirty page purging is no longer capable of purging inactive dirty pages inside active runs (due to recent arena/bin locking changes). Enhance tcache to support caching large objects, so that the same range of size classes is still cached, despite the removal of medium size class support.
2010-03-18 07:27:39 +08:00
arena->stats.lstats[(size >> PAGE_SHIFT) - 1].nmalloc++;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
arena->stats.lstats[(size >> PAGE_SHIFT) - 1].nrequests++;
arena->stats.lstats[(size >> PAGE_SHIFT) - 1].curruns++;
if (arena->stats.lstats[(size >> PAGE_SHIFT) - 1].curruns >
arena->stats.lstats[(size >> PAGE_SHIFT) - 1].highruns) {
arena->stats.lstats[(size >> PAGE_SHIFT) - 1].highruns =
arena->stats.lstats[(size >> PAGE_SHIFT) - 1].curruns;
}
Implement interval-based heap profile dumping. Add mallctl interfaces for profiling parameters. Fix a file descriptor leak in heap profile dumping.
2010-02-12 05:19:21 +08:00
#endif
#ifdef JEMALLOC_PROF
arena_prof_accum(arena, size);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
#endif
malloc_mutex_unlock(&arena->lock);
if (zero == false) {
#ifdef JEMALLOC_FILL
if (opt_junk)
memset(ret, 0xa5, size);
else if (opt_zero)
memset(ret, 0, size);
#endif
}
return (ret);
}
void *
arena_malloc(size_t size, bool zero)
{
assert(size != 0);
assert(QUANTUM_CEILING(size) <= arena_maxclass);
Remove medium size classes. Remove medium size classes, because concurrent dirty page purging is no longer capable of purging inactive dirty pages inside active runs (due to recent arena/bin locking changes). Enhance tcache to support caching large objects, so that the same range of size classes is still cached, despite the removal of medium size class support.
2010-03-18 07:27:39 +08:00
if (size <= small_maxclass) {
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
#ifdef JEMALLOC_TCACHE
tcache_t *tcache;
if ((tcache = tcache_get()) != NULL)
Remove medium size classes. Remove medium size classes, because concurrent dirty page purging is no longer capable of purging inactive dirty pages inside active runs (due to recent arena/bin locking changes). Enhance tcache to support caching large objects, so that the same range of size classes is still cached, despite the removal of medium size class support.
2010-03-18 07:27:39 +08:00
return (tcache_alloc_small(tcache, size, zero));
else
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
#endif
return (arena_malloc_small(choose_arena(), size, zero));
Remove medium size classes. Remove medium size classes, because concurrent dirty page purging is no longer capable of purging inactive dirty pages inside active runs (due to recent arena/bin locking changes). Enhance tcache to support caching large objects, so that the same range of size classes is still cached, despite the removal of medium size class support.
2010-03-18 07:27:39 +08:00
} else {
#ifdef JEMALLOC_TCACHE
if (size <= tcache_maxclass) {
tcache_t *tcache;
if ((tcache = tcache_get()) != NULL)
return (tcache_alloc_large(tcache, size, zero));
else {
return (arena_malloc_large(choose_arena(),
size, zero));
}
} else
#endif
return (arena_malloc_large(choose_arena(), size, zero));
}
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
/* Only handles large allocations that require more than page alignment. */
void *
Add {,r,s,d}allocm(). Add allocm(), rallocm(), sallocm(), and dallocm(), which are a functional superset of malloc(), calloc(), posix_memalign(), malloc_usable_size(), and free().
2010-09-18 06:46:18 +08:00
arena_palloc(arena_t *arena, size_t size, size_t alloc_size, size_t alignment,
bool zero)
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
{
void *ret;
size_t offset;
arena_chunk_t *chunk;
assert((size & PAGE_MASK) == 0);
Add per thread allocation counters, and enhance heap sampling. Add the "thread.allocated" and "thread.deallocated" mallctls, which can be used to query the total number of bytes ever allocated/deallocated by the calling thread. Add s2u() and sa2u(), which can be used to compute the usable size that will result from an allocation request of a particular size/alignment. Re-factor ipalloc() to use sa2u(). Enhance the heap profiler to trigger samples based on usable size, rather than request size. This has a subtle, but important, impact on the accuracy of heap sampling. For example, previous to this change, 16- and 17-byte objects were sampled at nearly the same rate, but 17-byte objects actually consume 32 bytes each. Therefore it was possible for the sample to be somewhat skewed compared to actual memory usage of the allocated objects.
2010-10-21 08:39:18 +08:00
alignment = PAGE_CEILING(alignment);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
malloc_mutex_lock(&arena->lock);
Add {,r,s,d}allocm(). Add allocm(), rallocm(), sallocm(), and dallocm(), which are a functional superset of malloc(), calloc(), posix_memalign(), malloc_usable_size(), and free().
2010-09-18 06:46:18 +08:00
ret = (void *)arena_run_alloc(arena, alloc_size, true, zero);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
if (ret == NULL) {
malloc_mutex_unlock(&arena->lock);
return (NULL);
}
chunk = (arena_chunk_t *)CHUNK_ADDR2BASE(ret);
offset = (uintptr_t)ret & (alignment - 1);
assert((offset & PAGE_MASK) == 0);
assert(offset < alloc_size);
if (offset == 0)
arena_run_trim_tail(arena, chunk, ret, alloc_size, size, false);
else {
size_t leadsize, trailsize;
leadsize = alignment - offset;
if (leadsize > 0) {
arena_run_trim_head(arena, chunk, ret, alloc_size,
alloc_size - leadsize);
ret = (void *)((uintptr_t)ret + leadsize);
}
trailsize = alloc_size - leadsize - size;
if (trailsize != 0) {
/* Trim trailing space. */
assert(trailsize < alloc_size);
arena_run_trim_tail(arena, chunk, ret, size + trailsize,
size, false);
}
}
#ifdef JEMALLOC_STATS
arena->stats.nmalloc_large++;
Remove medium size classes. Remove medium size classes, because concurrent dirty page purging is no longer capable of purging inactive dirty pages inside active runs (due to recent arena/bin locking changes). Enhance tcache to support caching large objects, so that the same range of size classes is still cached, despite the removal of medium size class support.
2010-03-18 07:27:39 +08:00
arena->stats.nrequests_large++;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
arena->stats.allocated_large += size;
Remove medium size classes. Remove medium size classes, because concurrent dirty page purging is no longer capable of purging inactive dirty pages inside active runs (due to recent arena/bin locking changes). Enhance tcache to support caching large objects, so that the same range of size classes is still cached, despite the removal of medium size class support.
2010-03-18 07:27:39 +08:00
arena->stats.lstats[(size >> PAGE_SHIFT) - 1].nmalloc++;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
arena->stats.lstats[(size >> PAGE_SHIFT) - 1].nrequests++;
arena->stats.lstats[(size >> PAGE_SHIFT) - 1].curruns++;
if (arena->stats.lstats[(size >> PAGE_SHIFT) - 1].curruns >
arena->stats.lstats[(size >> PAGE_SHIFT) - 1].highruns) {
arena->stats.lstats[(size >> PAGE_SHIFT) - 1].highruns =
arena->stats.lstats[(size >> PAGE_SHIFT) - 1].curruns;
}
#endif
malloc_mutex_unlock(&arena->lock);
#ifdef JEMALLOC_FILL
Add {,r,s,d}allocm(). Add allocm(), rallocm(), sallocm(), and dallocm(), which are a functional superset of malloc(), calloc(), posix_memalign(), malloc_usable_size(), and free().
2010-09-18 06:46:18 +08:00
if (zero == false) {
if (opt_junk)
memset(ret, 0xa5, size);
else if (opt_zero)
memset(ret, 0, size);
}
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
#endif
return (ret);
}
/* Return the size of the allocation pointed to by ptr. */
size_t
arena_salloc(const void *ptr)
{
size_t ret;
arena_chunk_t *chunk;
size_t pageind, mapbits;
assert(ptr != NULL);
assert(CHUNK_ADDR2BASE(ptr) != ptr);
chunk = (arena_chunk_t *)CHUNK_ADDR2BASE(ptr);
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
pageind = ((uintptr_t)ptr - (uintptr_t)chunk) >> PAGE_SHIFT;
mapbits = chunk->map[pageind-map_bias].bits;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
assert((mapbits & CHUNK_MAP_ALLOCATED) != 0);
if ((mapbits & CHUNK_MAP_LARGE) == 0) {
arena_run_t *run = (arena_run_t *)((uintptr_t)chunk +
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
(uintptr_t)((pageind - (mapbits >> PAGE_SHIFT)) <<
PAGE_SHIFT));
Use bitmaps to track small regions. The previous free list implementation, which embedded singly linked lists in available regions, had the unfortunate side effect of causing many cache misses during thread cache fills. Fix this in two places: - arena_run_t: Use a new bitmap implementation to track which regions are available. Furthermore, revert to preferring the lowest available region (as jemalloc did with its old bitmap-based approach). - tcache_t: Move read-only tcache_bin_t metadata into tcache_bin_info_t, and add a contiguous array of pointers to tcache_t in order to track cached objects. This substantially increases the size of tcache_t, but results in much higher data locality for common tcache operations. As a side benefit, it is again possible to efficiently flush the least recently used cached objects, so this change changes flushing from MRU to LRU. The new bitmap implementation uses a multi-level summary approach to make finding the lowest available region very fast. In practice, bitmaps only have one or two levels, though the implementation is general enough to handle extremely large bitmaps, mainly so that large page sizes can still be entertained. Fix tcache_bin_flush_large() to always flush statistics, in the same way that tcache_bin_flush_small() was recently fixed. Use JEMALLOC_DEBUG rather than NDEBUG. Add dassert(), and use it for debug-only asserts.
2011-03-17 01:30:13 +08:00
dassert(run->magic == ARENA_RUN_MAGIC);
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
size_t binind = arena_bin_index(chunk->arena, run->bin);
arena_bin_info_t *bin_info = &arena_bin_info[binind];
Add assertions. Check for interior pointers in arena_[ds]alloc(). Check for corrupt pointers in tcache_alloc().
2010-03-16 07:38:27 +08:00
assert(((uintptr_t)ptr - ((uintptr_t)run +
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
(uintptr_t)bin_info->reg0_offset)) % bin_info->reg_size ==
Add assertions. Check for interior pointers in arena_[ds]alloc(). Check for corrupt pointers in tcache_alloc().
2010-03-16 07:38:27 +08:00
0);
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
ret = bin_info->reg_size;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
} else {
Add assertions. Check for interior pointers in arena_[ds]alloc(). Check for corrupt pointers in tcache_alloc().
2010-03-16 07:38:27 +08:00
assert(((uintptr_t)ptr & PAGE_MASK) == 0);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
ret = mapbits & ~PAGE_MASK;
assert(ret != 0);
}
return (ret);
}
Implement allocation profiling and leack checking. Add the --enable-prof and --enable-prof-libunwind configure options. Add the B/b, F/f, I/i, L/l, and U/u JEMALLOC_OPTIONS. Interval-based profile dump triggering is not yet implemented. Add supporting generic code: * Add memory barriers. * Add prn (LCG PRNG). * Add hash (Murmur hash function). * Add ckh (cuckoo hash tables).
2010-02-11 02:37:56 +08:00
#ifdef JEMALLOC_PROF
Reduce statistical heap sampling memory overhead. If the mean heap sampling interval is larger than one page, simulate sampled small objects with large objects. This allows profiling context pointers to be omitted for small objects. As a result, the memory overhead for sampling decreases as the sampling interval is increased. Fix a compilation error in the profiling code.
2010-04-01 07:45:04 +08:00
void
arena_prof_promoted(const void *ptr, size_t size)
{
arena_chunk_t *chunk;
size_t pageind, binind;
assert(ptr != NULL);
assert(CHUNK_ADDR2BASE(ptr) != ptr);
assert(isalloc(ptr) == PAGE_SIZE);
Fix two prof-related bugs in rallocm(). Properly handle boundary conditions for sampled region promotion in rallocm(). Prior to this fix, some combinations of 'size' and 'extra' values could cause erroneous behavior. Additionally, size class recording for promoted regions was incorrect.
2011-08-12 13:51:00 +08:00
assert(size <= small_maxclass);
Reduce statistical heap sampling memory overhead. If the mean heap sampling interval is larger than one page, simulate sampled small objects with large objects. This allows profiling context pointers to be omitted for small objects. As a result, the memory overhead for sampling decreases as the sampling interval is increased. Fix a compilation error in the profiling code.
2010-04-01 07:45:04 +08:00
chunk = (arena_chunk_t *)CHUNK_ADDR2BASE(ptr);
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
pageind = ((uintptr_t)ptr - (uintptr_t)chunk) >> PAGE_SHIFT;
Reduce size of small_size2bin lookup table. Convert all direct small_size2bin[...] accesses to SMALL_SIZE2BIN(...) macro calls, and use a couple of cheap math operations to allow compacting the table by 4X or 8X, on 32- and 64-bit systems, respectively.
2011-03-07 14:56:36 +08:00
binind = SMALL_SIZE2BIN(size);
Reduce statistical heap sampling memory overhead. If the mean heap sampling interval is larger than one page, simulate sampled small objects with large objects. This allows profiling context pointers to be omitted for small objects. As a result, the memory overhead for sampling decreases as the sampling interval is increased. Fix a compilation error in the profiling code.
2010-04-01 07:45:04 +08:00
assert(binind < nbins);
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
chunk->map[pageind-map_bias].bits = (chunk->map[pageind-map_bias].bits &
Fix heap profiling bugs. Fix a regression due to the recent heap profiling accuracy improvements: prof_{m,re}alloc() must set the object's profiling context regardless of whether it is sampled. Fix management of the CHUNK_MAP_CLASS chunk map bits, such that all large object (re-)allocation paths correctly initialize the bits. Prior to this fix, in-place realloc() cleared the bits, resulting in incorrect reported object size from arena_salloc_demote(). After this fix the non-demoted bit pattern is all zeros (instead of all ones), which makes it easier to assure that the bits are properly set.
2010-10-23 01:45:59 +08:00
~CHUNK_MAP_CLASS_MASK) | ((binind+1) << CHUNK_MAP_CLASS_SHIFT);
Reduce statistical heap sampling memory overhead. If the mean heap sampling interval is larger than one page, simulate sampled small objects with large objects. This allows profiling context pointers to be omitted for small objects. As a result, the memory overhead for sampling decreases as the sampling interval is increased. Fix a compilation error in the profiling code.
2010-04-01 07:45:04 +08:00
}
size_t
arena_salloc_demote(const void *ptr)
{
size_t ret;
arena_chunk_t *chunk;
size_t pageind, mapbits;
assert(ptr != NULL);
assert(CHUNK_ADDR2BASE(ptr) != ptr);
chunk = (arena_chunk_t *)CHUNK_ADDR2BASE(ptr);
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
pageind = ((uintptr_t)ptr - (uintptr_t)chunk) >> PAGE_SHIFT;
mapbits = chunk->map[pageind-map_bias].bits;
Reduce statistical heap sampling memory overhead. If the mean heap sampling interval is larger than one page, simulate sampled small objects with large objects. This allows profiling context pointers to be omitted for small objects. As a result, the memory overhead for sampling decreases as the sampling interval is increased. Fix a compilation error in the profiling code.
2010-04-01 07:45:04 +08:00
assert((mapbits & CHUNK_MAP_ALLOCATED) != 0);
if ((mapbits & CHUNK_MAP_LARGE) == 0) {
arena_run_t *run = (arena_run_t *)((uintptr_t)chunk +
(uintptr_t)((pageind - (mapbits >> PAGE_SHIFT)) <<
PAGE_SHIFT));
Use bitmaps to track small regions. The previous free list implementation, which embedded singly linked lists in available regions, had the unfortunate side effect of causing many cache misses during thread cache fills. Fix this in two places: - arena_run_t: Use a new bitmap implementation to track which regions are available. Furthermore, revert to preferring the lowest available region (as jemalloc did with its old bitmap-based approach). - tcache_t: Move read-only tcache_bin_t metadata into tcache_bin_info_t, and add a contiguous array of pointers to tcache_t in order to track cached objects. This substantially increases the size of tcache_t, but results in much higher data locality for common tcache operations. As a side benefit, it is again possible to efficiently flush the least recently used cached objects, so this change changes flushing from MRU to LRU. The new bitmap implementation uses a multi-level summary approach to make finding the lowest available region very fast. In practice, bitmaps only have one or two levels, though the implementation is general enough to handle extremely large bitmaps, mainly so that large page sizes can still be entertained. Fix tcache_bin_flush_large() to always flush statistics, in the same way that tcache_bin_flush_small() was recently fixed. Use JEMALLOC_DEBUG rather than NDEBUG. Add dassert(), and use it for debug-only asserts.
2011-03-17 01:30:13 +08:00
dassert(run->magic == ARENA_RUN_MAGIC);
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
size_t binind = arena_bin_index(chunk->arena, run->bin);
arena_bin_info_t *bin_info = &arena_bin_info[binind];
Reduce statistical heap sampling memory overhead. If the mean heap sampling interval is larger than one page, simulate sampled small objects with large objects. This allows profiling context pointers to be omitted for small objects. As a result, the memory overhead for sampling decreases as the sampling interval is increased. Fix a compilation error in the profiling code.
2010-04-01 07:45:04 +08:00
assert(((uintptr_t)ptr - ((uintptr_t)run +
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
(uintptr_t)bin_info->reg0_offset)) % bin_info->reg_size ==
Reduce statistical heap sampling memory overhead. If the mean heap sampling interval is larger than one page, simulate sampled small objects with large objects. This allows profiling context pointers to be omitted for small objects. As a result, the memory overhead for sampling decreases as the sampling interval is increased. Fix a compilation error in the profiling code.
2010-04-01 07:45:04 +08:00
0);
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
ret = bin_info->reg_size;
Reduce statistical heap sampling memory overhead. If the mean heap sampling interval is larger than one page, simulate sampled small objects with large objects. This allows profiling context pointers to be omitted for small objects. As a result, the memory overhead for sampling decreases as the sampling interval is increased. Fix a compilation error in the profiling code.
2010-04-01 07:45:04 +08:00
} else {
assert(((uintptr_t)ptr & PAGE_MASK) == 0);
ret = mapbits & ~PAGE_MASK;
if (prof_promote && ret == PAGE_SIZE && (mapbits &
Fix heap profiling bugs. Fix a regression due to the recent heap profiling accuracy improvements: prof_{m,re}alloc() must set the object's profiling context regardless of whether it is sampled. Fix management of the CHUNK_MAP_CLASS chunk map bits, such that all large object (re-)allocation paths correctly initialize the bits. Prior to this fix, in-place realloc() cleared the bits, resulting in incorrect reported object size from arena_salloc_demote(). After this fix the non-demoted bit pattern is all zeros (instead of all ones), which makes it easier to assure that the bits are properly set.
2010-10-23 01:45:59 +08:00
CHUNK_MAP_CLASS_MASK) != 0) {
Reduce statistical heap sampling memory overhead. If the mean heap sampling interval is larger than one page, simulate sampled small objects with large objects. This allows profiling context pointers to be omitted for small objects. As a result, the memory overhead for sampling decreases as the sampling interval is increased. Fix a compilation error in the profiling code.
2010-04-01 07:45:04 +08:00
size_t binind = ((mapbits & CHUNK_MAP_CLASS_MASK) >>
Fix heap profiling bugs. Fix a regression due to the recent heap profiling accuracy improvements: prof_{m,re}alloc() must set the object's profiling context regardless of whether it is sampled. Fix management of the CHUNK_MAP_CLASS chunk map bits, such that all large object (re-)allocation paths correctly initialize the bits. Prior to this fix, in-place realloc() cleared the bits, resulting in incorrect reported object size from arena_salloc_demote(). After this fix the non-demoted bit pattern is all zeros (instead of all ones), which makes it easier to assure that the bits are properly set.
2010-10-23 01:45:59 +08:00
CHUNK_MAP_CLASS_SHIFT) - 1;
Reduce statistical heap sampling memory overhead. If the mean heap sampling interval is larger than one page, simulate sampled small objects with large objects. This allows profiling context pointers to be omitted for small objects. As a result, the memory overhead for sampling decreases as the sampling interval is increased. Fix a compilation error in the profiling code.
2010-04-01 07:45:04 +08:00
assert(binind < nbins);
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
ret = arena_bin_info[binind].reg_size;
Reduce statistical heap sampling memory overhead. If the mean heap sampling interval is larger than one page, simulate sampled small objects with large objects. This allows profiling context pointers to be omitted for small objects. As a result, the memory overhead for sampling decreases as the sampling interval is increased. Fix a compilation error in the profiling code.
2010-04-01 07:45:04 +08:00
}
assert(ret != 0);
}
return (ret);
}
Implement allocation profiling and leack checking. Add the --enable-prof and --enable-prof-libunwind configure options. Add the B/b, F/f, I/i, L/l, and U/u JEMALLOC_OPTIONS. Interval-based profile dump triggering is not yet implemented. Add supporting generic code: * Add memory barriers. * Add prn (LCG PRNG). * Add hash (Murmur hash function). * Add ckh (cuckoo hash tables).
2010-02-11 02:37:56 +08:00
#endif
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
static void
Fix arena bugs. Split arena_dissociate_bin_run() out of arena_dalloc_bin_run(), so that arena_bin_malloc_hard() can avoid dissociation when recovering from losing a race. This fixes a bug introduced by a recent attempted fix. Fix a regression in arena_ralloc_large_grow() that was introduced by recent fixes.
2010-10-18 15:04:44 +08:00
arena_dissociate_bin_run(arena_chunk_t *chunk, arena_run_t *run,
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
arena_bin_t *bin)
{
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
/* Dissociate run from bin. */
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
if (run == bin->runcur)
bin->runcur = NULL;
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
else {
size_t binind = arena_bin_index(chunk->arena, bin);
arena_bin_info_t *bin_info = &arena_bin_info[binind];
if (bin_info->nregs != 1) {
size_t run_pageind = (((uintptr_t)run -
(uintptr_t)chunk)) >> PAGE_SHIFT;
arena_chunk_map_t *run_mapelm =
&chunk->map[run_pageind-map_bias];
/*
* This block's conditional is necessary because if the
* run only contains one region, then it never gets
* inserted into the non-full runs tree.
*/
arena_run_tree_remove(&bin->runs, run_mapelm);
}
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
Fix arena bugs. Split arena_dissociate_bin_run() out of arena_dalloc_bin_run(), so that arena_bin_malloc_hard() can avoid dissociation when recovering from losing a race. This fixes a bug introduced by a recent attempted fix. Fix a regression in arena_ralloc_large_grow() that was introduced by recent fixes.
2010-10-18 15:04:44 +08:00
}
static void
arena_dalloc_bin_run(arena_t *arena, arena_chunk_t *chunk, arena_run_t *run,
arena_bin_t *bin)
{
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
size_t binind;
arena_bin_info_t *bin_info;
Fix arena bugs. Split arena_dissociate_bin_run() out of arena_dalloc_bin_run(), so that arena_bin_malloc_hard() can avoid dissociation when recovering from losing a race. This fixes a bug introduced by a recent attempted fix. Fix a regression in arena_ralloc_large_grow() that was introduced by recent fixes.
2010-10-18 15:04:44 +08:00
size_t npages, run_ind, past;
assert(run != bin->runcur);
assert(arena_run_tree_search(&bin->runs, &chunk->map[
(((uintptr_t)run-(uintptr_t)chunk)>>PAGE_SHIFT)-map_bias]) == NULL);
Push locks into arena bins. For bin-related allocation, protect data structures with bin locks rather than arena locks. Arena locks remain for run allocation/deallocation and other miscellaneous operations. Restructure statistics counters to maintain per bin allocated/nmalloc/ndalloc, but continue to provide arena-wide statistics via aggregation in the ctl code.
2010-03-14 12:32:56 +08:00
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
binind = arena_bin_index(chunk->arena, run->bin);
bin_info = &arena_bin_info[binind];
mmap()/munmap() without arena->lock or bin->lock.
2010-03-15 10:43:56 +08:00
malloc_mutex_unlock(&bin->lock);
/******************************/
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
npages = bin_info->run_size >> PAGE_SHIFT;
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
run_ind = (size_t)(((uintptr_t)run - (uintptr_t)chunk) >> PAGE_SHIFT);
Use bitmaps to track small regions. The previous free list implementation, which embedded singly linked lists in available regions, had the unfortunate side effect of causing many cache misses during thread cache fills. Fix this in two places: - arena_run_t: Use a new bitmap implementation to track which regions are available. Furthermore, revert to preferring the lowest available region (as jemalloc did with its old bitmap-based approach). - tcache_t: Move read-only tcache_bin_t metadata into tcache_bin_info_t, and add a contiguous array of pointers to tcache_t in order to track cached objects. This substantially increases the size of tcache_t, but results in much higher data locality for common tcache operations. As a side benefit, it is again possible to efficiently flush the least recently used cached objects, so this change changes flushing from MRU to LRU. The new bitmap implementation uses a multi-level summary approach to make finding the lowest available region very fast. In practice, bitmaps only have one or two levels, though the implementation is general enough to handle extremely large bitmaps, mainly so that large page sizes can still be entertained. Fix tcache_bin_flush_large() to always flush statistics, in the same way that tcache_bin_flush_small() was recently fixed. Use JEMALLOC_DEBUG rather than NDEBUG. Add dassert(), and use it for debug-only asserts.
2011-03-17 01:30:13 +08:00
past = (size_t)(PAGE_CEILING((uintptr_t)run +
(uintptr_t)bin_info->reg0_offset + (uintptr_t)(run->nextind *
bin_info->reg_size) - (uintptr_t)chunk) >> PAGE_SHIFT);
Push locks into arena bins. For bin-related allocation, protect data structures with bin locks rather than arena locks. Arena locks remain for run allocation/deallocation and other miscellaneous operations. Restructure statistics counters to maintain per bin allocated/nmalloc/ndalloc, but continue to provide arena-wide statistics via aggregation in the ctl code.
2010-03-14 12:32:56 +08:00
malloc_mutex_lock(&arena->lock);
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
/*
* If the run was originally clean, and some pages were never touched,
* trim the clean pages before deallocating the dirty portion of the
* run.
*/
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
if ((chunk->map[run_ind-map_bias].bits & CHUNK_MAP_DIRTY) == 0 && past
- run_ind < npages) {
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
/*
* Trim clean pages. Convert to large run beforehand. Set the
* last map element first, in case this is a one-page run.
*/
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
chunk->map[run_ind+npages-1-map_bias].bits = CHUNK_MAP_LARGE |
Fix numerous arena bugs. In arena_ralloc_large_grow(), update the map element for the end of the newly grown run, rather than the interior map element that was the beginning of the appended run. This is a long-standing bug, and it had the potential to cause massive corruption, but triggering it required roughly the following sequence of events: 1) Large in-place growing realloc(), with left-over space in the run that followed the large object. 2) Allocation of the remainder run left over from (1). 3) Deallocation of the remainder run *before* deallocation of the large run, with unfortunate interior map state left over from previous run allocation/deallocation activity, such that one or more pages of allocated memory would be treated as part of the remainder run during run coalescing. In summary, this was a bad bug, but it was difficult to trigger. In arena_bin_malloc_hard(), if another thread wins the race to allocate a bin run, dispose of the spare run via arena_bin_lower_run() rather than arena_run_dalloc(), since the run has already been prepared for use as a bin run. This bug has existed since March 14, 2010: e00572b384c81bd2aba57fac32f7077a34388915 mmap()/munmap() without arena->lock or bin->lock. Fix bugs in arena_dalloc_bin_run(), arena_trim_head(), arena_trim_tail(), and arena_ralloc_large_grow() that could cause the CHUNK_MAP_UNZEROED map bit to become corrupted. These are all long-standing bugs, but the chances of them actually causing problems was much lower before the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion. Fix a large run statistics regression in arena_ralloc_large_grow() that was introduced on September 17, 2010: 8e3c3c61b5bb676a705450708e7e79698cdc9e0c Add {,r,s,d}allocm(). Add debug code to validate that supposedly pre-zeroed memory really is.
2010-10-18 08:51:37 +08:00
(chunk->map[run_ind+npages-1-map_bias].bits &
CHUNK_MAP_FLAGS_MASK);
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
chunk->map[run_ind-map_bias].bits = bin_info->run_size |
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
CHUNK_MAP_LARGE | (chunk->map[run_ind-map_bias].bits &
CHUNK_MAP_FLAGS_MASK);
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
arena_run_trim_tail(arena, chunk, run, (npages << PAGE_SHIFT),
Fix a bug in arena_dalloc_bin_run(). Fix the newsize argument to arena_run_trim_tail() that arena_dalloc_bin_run() passes. Previously, oldsize-newsize (i.e. the complement) was passed, which could erroneously cause dirty pages to be returned to the clean available runs tree. Prior to the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion, this bug merely caused dirty pages to be unaccounted for (and therefore never get purged), but with CHUNK_MAP_UNZEROED, this could cause dirty pages to be treated as zeroed (i.e. memory corruption).
2010-10-19 08:45:40 +08:00
((past - run_ind) << PAGE_SHIFT), false);
Fix numerous arena bugs. In arena_ralloc_large_grow(), update the map element for the end of the newly grown run, rather than the interior map element that was the beginning of the appended run. This is a long-standing bug, and it had the potential to cause massive corruption, but triggering it required roughly the following sequence of events: 1) Large in-place growing realloc(), with left-over space in the run that followed the large object. 2) Allocation of the remainder run left over from (1). 3) Deallocation of the remainder run *before* deallocation of the large run, with unfortunate interior map state left over from previous run allocation/deallocation activity, such that one or more pages of allocated memory would be treated as part of the remainder run during run coalescing. In summary, this was a bad bug, but it was difficult to trigger. In arena_bin_malloc_hard(), if another thread wins the race to allocate a bin run, dispose of the spare run via arena_bin_lower_run() rather than arena_run_dalloc(), since the run has already been prepared for use as a bin run. This bug has existed since March 14, 2010: e00572b384c81bd2aba57fac32f7077a34388915 mmap()/munmap() without arena->lock or bin->lock. Fix bugs in arena_dalloc_bin_run(), arena_trim_head(), arena_trim_tail(), and arena_ralloc_large_grow() that could cause the CHUNK_MAP_UNZEROED map bit to become corrupted. These are all long-standing bugs, but the chances of them actually causing problems was much lower before the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion. Fix a large run statistics regression in arena_ralloc_large_grow() that was introduced on September 17, 2010: 8e3c3c61b5bb676a705450708e7e79698cdc9e0c Add {,r,s,d}allocm(). Add debug code to validate that supposedly pre-zeroed memory really is.
2010-10-18 08:51:37 +08:00
/* npages = past - run_ind; */
Simplify small object allocation/deallocation. Use chained run free lists instead of bitmaps to track free objects within small runs. Remove reference counting for small object run pages.
2010-03-14 05:41:58 +08:00
}
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
#ifdef JEMALLOC_DEBUG
run->magic = 0;
#endif
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
arena_run_dalloc(arena, run, true);
Push locks into arena bins. For bin-related allocation, protect data structures with bin locks rather than arena locks. Arena locks remain for run allocation/deallocation and other miscellaneous operations. Restructure statistics counters to maintain per bin allocated/nmalloc/ndalloc, but continue to provide arena-wide statistics via aggregation in the ctl code.
2010-03-14 12:32:56 +08:00
malloc_mutex_unlock(&arena->lock);
mmap()/munmap() without arena->lock or bin->lock.
2010-03-15 10:43:56 +08:00
/****************************/
malloc_mutex_lock(&bin->lock);
Push locks into arena bins. For bin-related allocation, protect data structures with bin locks rather than arena locks. Arena locks remain for run allocation/deallocation and other miscellaneous operations. Restructure statistics counters to maintain per bin allocated/nmalloc/ndalloc, but continue to provide arena-wide statistics via aggregation in the ctl code.
2010-03-14 12:32:56 +08:00
#ifdef JEMALLOC_STATS
bin->stats.curruns--;
#endif
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
Fix numerous arena bugs. In arena_ralloc_large_grow(), update the map element for the end of the newly grown run, rather than the interior map element that was the beginning of the appended run. This is a long-standing bug, and it had the potential to cause massive corruption, but triggering it required roughly the following sequence of events: 1) Large in-place growing realloc(), with left-over space in the run that followed the large object. 2) Allocation of the remainder run left over from (1). 3) Deallocation of the remainder run *before* deallocation of the large run, with unfortunate interior map state left over from previous run allocation/deallocation activity, such that one or more pages of allocated memory would be treated as part of the remainder run during run coalescing. In summary, this was a bad bug, but it was difficult to trigger. In arena_bin_malloc_hard(), if another thread wins the race to allocate a bin run, dispose of the spare run via arena_bin_lower_run() rather than arena_run_dalloc(), since the run has already been prepared for use as a bin run. This bug has existed since March 14, 2010: e00572b384c81bd2aba57fac32f7077a34388915 mmap()/munmap() without arena->lock or bin->lock. Fix bugs in arena_dalloc_bin_run(), arena_trim_head(), arena_trim_tail(), and arena_ralloc_large_grow() that could cause the CHUNK_MAP_UNZEROED map bit to become corrupted. These are all long-standing bugs, but the chances of them actually causing problems was much lower before the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion. Fix a large run statistics regression in arena_ralloc_large_grow() that was introduced on September 17, 2010: 8e3c3c61b5bb676a705450708e7e79698cdc9e0c Add {,r,s,d}allocm(). Add debug code to validate that supposedly pre-zeroed memory really is.
2010-10-18 08:51:37 +08:00
static void
arena_bin_lower_run(arena_t *arena, arena_chunk_t *chunk, arena_run_t *run,
arena_bin_t *bin)
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
{
Fix arena bugs. Move part of arena_bin_lower_run() into the callers, since the conditions under which it should be called differ slightly between callers. Fix arena_chunk_purge() to omit run size in the last map entry for each run it temporarily allocates.
2010-10-18 11:57:30 +08:00
/*
* Make sure that bin->runcur always refers to the lowest non-full run,
* if one exists.
*/
if (bin->runcur == NULL)
bin->runcur = run;
else if ((uintptr_t)run < (uintptr_t)bin->runcur) {
/* Switch runcur. */
if (bin->runcur->nfree > 0) {
arena_chunk_t *runcur_chunk =
CHUNK_ADDR2BASE(bin->runcur);
size_t runcur_pageind = (((uintptr_t)bin->runcur -
(uintptr_t)runcur_chunk)) >> PAGE_SHIFT;
arena_chunk_map_t *runcur_mapelm =
&runcur_chunk->map[runcur_pageind-map_bias];
/* Insert runcur. */
arena_run_tree_insert(&bin->runs, runcur_mapelm);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
Fix arena bugs. Move part of arena_bin_lower_run() into the callers, since the conditions under which it should be called differ slightly between callers. Fix arena_chunk_purge() to omit run size in the last map entry for each run it temporarily allocates.
2010-10-18 11:57:30 +08:00
bin->runcur = run;
} else {
size_t run_pageind = (((uintptr_t)run -
(uintptr_t)chunk)) >> PAGE_SHIFT;
arena_chunk_map_t *run_mapelm =
&chunk->map[run_pageind-map_bias];
assert(arena_run_tree_search(&bin->runs, run_mapelm) == NULL);
arena_run_tree_insert(&bin->runs, run_mapelm);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
Fix numerous arena bugs. In arena_ralloc_large_grow(), update the map element for the end of the newly grown run, rather than the interior map element that was the beginning of the appended run. This is a long-standing bug, and it had the potential to cause massive corruption, but triggering it required roughly the following sequence of events: 1) Large in-place growing realloc(), with left-over space in the run that followed the large object. 2) Allocation of the remainder run left over from (1). 3) Deallocation of the remainder run *before* deallocation of the large run, with unfortunate interior map state left over from previous run allocation/deallocation activity, such that one or more pages of allocated memory would be treated as part of the remainder run during run coalescing. In summary, this was a bad bug, but it was difficult to trigger. In arena_bin_malloc_hard(), if another thread wins the race to allocate a bin run, dispose of the spare run via arena_bin_lower_run() rather than arena_run_dalloc(), since the run has already been prepared for use as a bin run. This bug has existed since March 14, 2010: e00572b384c81bd2aba57fac32f7077a34388915 mmap()/munmap() without arena->lock or bin->lock. Fix bugs in arena_dalloc_bin_run(), arena_trim_head(), arena_trim_tail(), and arena_ralloc_large_grow() that could cause the CHUNK_MAP_UNZEROED map bit to become corrupted. These are all long-standing bugs, but the chances of them actually causing problems was much lower before the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion. Fix a large run statistics regression in arena_ralloc_large_grow() that was introduced on September 17, 2010: 8e3c3c61b5bb676a705450708e7e79698cdc9e0c Add {,r,s,d}allocm(). Add debug code to validate that supposedly pre-zeroed memory really is.
2010-10-18 08:51:37 +08:00
}
void
arena_dalloc_bin(arena_t *arena, arena_chunk_t *chunk, void *ptr,
arena_chunk_map_t *mapelm)
{
size_t pageind;
arena_run_t *run;
arena_bin_t *bin;
#if (defined(JEMALLOC_FILL) || defined(JEMALLOC_STATS))
size_t size;
#endif
pageind = ((uintptr_t)ptr - (uintptr_t)chunk) >> PAGE_SHIFT;
run = (arena_run_t *)((uintptr_t)chunk + (uintptr_t)((pageind -
(mapelm->bits >> PAGE_SHIFT)) << PAGE_SHIFT));
Use bitmaps to track small regions. The previous free list implementation, which embedded singly linked lists in available regions, had the unfortunate side effect of causing many cache misses during thread cache fills. Fix this in two places: - arena_run_t: Use a new bitmap implementation to track which regions are available. Furthermore, revert to preferring the lowest available region (as jemalloc did with its old bitmap-based approach). - tcache_t: Move read-only tcache_bin_t metadata into tcache_bin_info_t, and add a contiguous array of pointers to tcache_t in order to track cached objects. This substantially increases the size of tcache_t, but results in much higher data locality for common tcache operations. As a side benefit, it is again possible to efficiently flush the least recently used cached objects, so this change changes flushing from MRU to LRU. The new bitmap implementation uses a multi-level summary approach to make finding the lowest available region very fast. In practice, bitmaps only have one or two levels, though the implementation is general enough to handle extremely large bitmaps, mainly so that large page sizes can still be entertained. Fix tcache_bin_flush_large() to always flush statistics, in the same way that tcache_bin_flush_small() was recently fixed. Use JEMALLOC_DEBUG rather than NDEBUG. Add dassert(), and use it for debug-only asserts.
2011-03-17 01:30:13 +08:00
dassert(run->magic == ARENA_RUN_MAGIC);
Fix numerous arena bugs. In arena_ralloc_large_grow(), update the map element for the end of the newly grown run, rather than the interior map element that was the beginning of the appended run. This is a long-standing bug, and it had the potential to cause massive corruption, but triggering it required roughly the following sequence of events: 1) Large in-place growing realloc(), with left-over space in the run that followed the large object. 2) Allocation of the remainder run left over from (1). 3) Deallocation of the remainder run *before* deallocation of the large run, with unfortunate interior map state left over from previous run allocation/deallocation activity, such that one or more pages of allocated memory would be treated as part of the remainder run during run coalescing. In summary, this was a bad bug, but it was difficult to trigger. In arena_bin_malloc_hard(), if another thread wins the race to allocate a bin run, dispose of the spare run via arena_bin_lower_run() rather than arena_run_dalloc(), since the run has already been prepared for use as a bin run. This bug has existed since March 14, 2010: e00572b384c81bd2aba57fac32f7077a34388915 mmap()/munmap() without arena->lock or bin->lock. Fix bugs in arena_dalloc_bin_run(), arena_trim_head(), arena_trim_tail(), and arena_ralloc_large_grow() that could cause the CHUNK_MAP_UNZEROED map bit to become corrupted. These are all long-standing bugs, but the chances of them actually causing problems was much lower before the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion. Fix a large run statistics regression in arena_ralloc_large_grow() that was introduced on September 17, 2010: 8e3c3c61b5bb676a705450708e7e79698cdc9e0c Add {,r,s,d}allocm(). Add debug code to validate that supposedly pre-zeroed memory really is.
2010-10-18 08:51:37 +08:00
bin = run->bin;
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
size_t binind = arena_bin_index(arena, bin);
arena_bin_info_t *bin_info = &arena_bin_info[binind];
Fix numerous arena bugs. In arena_ralloc_large_grow(), update the map element for the end of the newly grown run, rather than the interior map element that was the beginning of the appended run. This is a long-standing bug, and it had the potential to cause massive corruption, but triggering it required roughly the following sequence of events: 1) Large in-place growing realloc(), with left-over space in the run that followed the large object. 2) Allocation of the remainder run left over from (1). 3) Deallocation of the remainder run *before* deallocation of the large run, with unfortunate interior map state left over from previous run allocation/deallocation activity, such that one or more pages of allocated memory would be treated as part of the remainder run during run coalescing. In summary, this was a bad bug, but it was difficult to trigger. In arena_bin_malloc_hard(), if another thread wins the race to allocate a bin run, dispose of the spare run via arena_bin_lower_run() rather than arena_run_dalloc(), since the run has already been prepared for use as a bin run. This bug has existed since March 14, 2010: e00572b384c81bd2aba57fac32f7077a34388915 mmap()/munmap() without arena->lock or bin->lock. Fix bugs in arena_dalloc_bin_run(), arena_trim_head(), arena_trim_tail(), and arena_ralloc_large_grow() that could cause the CHUNK_MAP_UNZEROED map bit to become corrupted. These are all long-standing bugs, but the chances of them actually causing problems was much lower before the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion. Fix a large run statistics regression in arena_ralloc_large_grow() that was introduced on September 17, 2010: 8e3c3c61b5bb676a705450708e7e79698cdc9e0c Add {,r,s,d}allocm(). Add debug code to validate that supposedly pre-zeroed memory really is.
2010-10-18 08:51:37 +08:00
#if (defined(JEMALLOC_FILL) || defined(JEMALLOC_STATS))
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
size = bin_info->reg_size;
Fix numerous arena bugs. In arena_ralloc_large_grow(), update the map element for the end of the newly grown run, rather than the interior map element that was the beginning of the appended run. This is a long-standing bug, and it had the potential to cause massive corruption, but triggering it required roughly the following sequence of events: 1) Large in-place growing realloc(), with left-over space in the run that followed the large object. 2) Allocation of the remainder run left over from (1). 3) Deallocation of the remainder run *before* deallocation of the large run, with unfortunate interior map state left over from previous run allocation/deallocation activity, such that one or more pages of allocated memory would be treated as part of the remainder run during run coalescing. In summary, this was a bad bug, but it was difficult to trigger. In arena_bin_malloc_hard(), if another thread wins the race to allocate a bin run, dispose of the spare run via arena_bin_lower_run() rather than arena_run_dalloc(), since the run has already been prepared for use as a bin run. This bug has existed since March 14, 2010: e00572b384c81bd2aba57fac32f7077a34388915 mmap()/munmap() without arena->lock or bin->lock. Fix bugs in arena_dalloc_bin_run(), arena_trim_head(), arena_trim_tail(), and arena_ralloc_large_grow() that could cause the CHUNK_MAP_UNZEROED map bit to become corrupted. These are all long-standing bugs, but the chances of them actually causing problems was much lower before the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion. Fix a large run statistics regression in arena_ralloc_large_grow() that was introduced on September 17, 2010: 8e3c3c61b5bb676a705450708e7e79698cdc9e0c Add {,r,s,d}allocm(). Add debug code to validate that supposedly pre-zeroed memory really is.
2010-10-18 08:51:37 +08:00
#endif
#ifdef JEMALLOC_FILL
if (opt_junk)
memset(ptr, 0x5a, size);
#endif
arena_run_reg_dalloc(run, ptr);
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
if (run->nfree == bin_info->nregs) {
Fix arena bugs. Split arena_dissociate_bin_run() out of arena_dalloc_bin_run(), so that arena_bin_malloc_hard() can avoid dissociation when recovering from losing a race. This fixes a bug introduced by a recent attempted fix. Fix a regression in arena_ralloc_large_grow() that was introduced by recent fixes.
2010-10-18 15:04:44 +08:00
arena_dissociate_bin_run(chunk, run, bin);
Fix arena bugs. Move part of arena_bin_lower_run() into the callers, since the conditions under which it should be called differ slightly between callers. Fix arena_chunk_purge() to omit run size in the last map entry for each run it temporarily allocates.
2010-10-18 11:57:30 +08:00
arena_dalloc_bin_run(arena, chunk, run, bin);
Fix arena bugs. Split arena_dissociate_bin_run() out of arena_dalloc_bin_run(), so that arena_bin_malloc_hard() can avoid dissociation when recovering from losing a race. This fixes a bug introduced by a recent attempted fix. Fix a regression in arena_ralloc_large_grow() that was introduced by recent fixes.
2010-10-18 15:04:44 +08:00
} else if (run->nfree == 1 && run != bin->runcur)
Fix arena bugs. Move part of arena_bin_lower_run() into the callers, since the conditions under which it should be called differ slightly between callers. Fix arena_chunk_purge() to omit run size in the last map entry for each run it temporarily allocates.
2010-10-18 11:57:30 +08:00
arena_bin_lower_run(arena, chunk, run, bin);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
#ifdef JEMALLOC_STATS
Push locks into arena bins. For bin-related allocation, protect data structures with bin locks rather than arena locks. Arena locks remain for run allocation/deallocation and other miscellaneous operations. Restructure statistics counters to maintain per bin allocated/nmalloc/ndalloc, but continue to provide arena-wide statistics via aggregation in the ctl code.
2010-03-14 12:32:56 +08:00
bin->stats.allocated -= size;
bin->stats.ndalloc++;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
#endif
}
#ifdef JEMALLOC_STATS
void
Add merged arena stats printing. Add the "m" and "a" opts flags for malloc_stats_print().
2010-01-18 09:35:19 +08:00
arena_stats_merge(arena_t *arena, size_t *nactive, size_t *ndirty,
arena_stats_t *astats, malloc_bin_stats_t *bstats,
malloc_large_stats_t *lstats)
{
Implement mallctl{nametomib,bymib}(). Replace chunk stats code that was missing locking; this fixes a race condition that could corrupt chunk statistics. Converting malloc_stats_print() to use mallctl*(). Add a missing semicolon in th DSS code. Convert malloc_tcache_flush() to a mallctl. Convert malloc_swap_enable() to a set of mallctl's.
2010-01-28 05:10:55 +08:00
unsigned i;
Add merged arena stats printing. Add the "m" and "a" opts flags for malloc_stats_print().
2010-01-18 09:35:19 +08:00
Push locks into arena bins. For bin-related allocation, protect data structures with bin locks rather than arena locks. Arena locks remain for run allocation/deallocation and other miscellaneous operations. Restructure statistics counters to maintain per bin allocated/nmalloc/ndalloc, but continue to provide arena-wide statistics via aggregation in the ctl code.
2010-03-14 12:32:56 +08:00
malloc_mutex_lock(&arena->lock);
Add merged arena stats printing. Add the "m" and "a" opts flags for malloc_stats_print().
2010-01-18 09:35:19 +08:00
*nactive += arena->nactive;
*ndirty += arena->ndirty;
Add the --enable-swap configure option. Add malloc_swap_enable(). Add the O/o JEMALLOC_OPTIONS flags, which control memory overcommit. Fix mapped memory stats reporting for arenas.
2010-01-24 18:53:40 +08:00
astats->mapped += arena->stats.mapped;
Add merged arena stats printing. Add the "m" and "a" opts flags for malloc_stats_print().
2010-01-18 09:35:19 +08:00
astats->npurge += arena->stats.npurge;
astats->nmadvise += arena->stats.nmadvise;
astats->purged += arena->stats.purged;
astats->allocated_large += arena->stats.allocated_large;
astats->nmalloc_large += arena->stats.nmalloc_large;
astats->ndalloc_large += arena->stats.ndalloc_large;
Remove medium size classes. Remove medium size classes, because concurrent dirty page purging is no longer capable of purging inactive dirty pages inside active runs (due to recent arena/bin locking changes). Enhance tcache to support caching large objects, so that the same range of size classes is still cached, despite the removal of medium size class support.
2010-03-18 07:27:39 +08:00
astats->nrequests_large += arena->stats.nrequests_large;
Add merged arena stats printing. Add the "m" and "a" opts flags for malloc_stats_print().
2010-01-18 09:35:19 +08:00
Implement mallctl{nametomib,bymib}(). Replace chunk stats code that was missing locking; this fixes a race condition that could corrupt chunk statistics. Converting malloc_stats_print() to use mallctl*(). Add a missing semicolon in th DSS code. Convert malloc_tcache_flush() to a mallctl. Convert malloc_swap_enable() to a set of mallctl's.
2010-01-28 05:10:55 +08:00
for (i = 0; i < nlclasses; i++) {
Remove medium size classes. Remove medium size classes, because concurrent dirty page purging is no longer capable of purging inactive dirty pages inside active runs (due to recent arena/bin locking changes). Enhance tcache to support caching large objects, so that the same range of size classes is still cached, despite the removal of medium size class support.
2010-03-18 07:27:39 +08:00
lstats[i].nmalloc += arena->stats.lstats[i].nmalloc;
lstats[i].ndalloc += arena->stats.lstats[i].ndalloc;
Add merged arena stats printing. Add the "m" and "a" opts flags for malloc_stats_print().
2010-01-18 09:35:19 +08:00
lstats[i].nrequests += arena->stats.lstats[i].nrequests;
lstats[i].highruns += arena->stats.lstats[i].highruns;
lstats[i].curruns += arena->stats.lstats[i].curruns;
}
Push locks into arena bins. For bin-related allocation, protect data structures with bin locks rather than arena locks. Arena locks remain for run allocation/deallocation and other miscellaneous operations. Restructure statistics counters to maintain per bin allocated/nmalloc/ndalloc, but continue to provide arena-wide statistics via aggregation in the ctl code.
2010-03-14 12:32:56 +08:00
malloc_mutex_unlock(&arena->lock);
for (i = 0; i < nbins; i++) {
arena_bin_t *bin = &arena->bins[i];
malloc_mutex_lock(&bin->lock);
bstats[i].allocated += bin->stats.allocated;
bstats[i].nmalloc += bin->stats.nmalloc;
bstats[i].ndalloc += bin->stats.ndalloc;
bstats[i].nrequests += bin->stats.nrequests;
#ifdef JEMALLOC_TCACHE
bstats[i].nfills += bin->stats.nfills;
bstats[i].nflushes += bin->stats.nflushes;
#endif
bstats[i].nruns += bin->stats.nruns;
bstats[i].reruns += bin->stats.reruns;
bstats[i].highruns += bin->stats.highruns;
bstats[i].curruns += bin->stats.curruns;
malloc_mutex_unlock(&bin->lock);
}
Add merged arena stats printing. Add the "m" and "a" opts flags for malloc_stats_print().
2010-01-18 09:35:19 +08:00
}
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
#endif
void
arena_dalloc_large(arena_t *arena, arena_chunk_t *chunk, void *ptr)
{
Fix some comments and whitespace.
2010-01-31 19:57:29 +08:00
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
/* Large allocation. */
#ifdef JEMALLOC_FILL
Fix large object stats collection bugs.
2010-01-31 19:49:35 +08:00
# ifndef JEMALLOC_STATS
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
if (opt_junk)
Fix large object stats collection bugs.
2010-01-31 19:49:35 +08:00
# endif
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
#endif
{
#if (defined(JEMALLOC_FILL) || defined(JEMALLOC_STATS))
size_t pageind = ((uintptr_t)ptr - (uintptr_t)chunk) >>
PAGE_SHIFT;
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
size_t size = chunk->map[pageind-map_bias].bits & ~PAGE_MASK;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
#endif
#ifdef JEMALLOC_FILL
Fix large object stats collection bugs.
2010-01-31 19:49:35 +08:00
# ifdef JEMALLOC_STATS
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
if (opt_junk)
Fix large object stats collection bugs.
2010-01-31 19:49:35 +08:00
# endif
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
memset(ptr, 0x5a, size);
#endif
#ifdef JEMALLOC_STATS
Fix large object stats collection bugs.
2010-01-31 19:49:35 +08:00
arena->stats.ndalloc_large++;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
arena->stats.allocated_large -= size;
Remove medium size classes. Remove medium size classes, because concurrent dirty page purging is no longer capable of purging inactive dirty pages inside active runs (due to recent arena/bin locking changes). Enhance tcache to support caching large objects, so that the same range of size classes is still cached, despite the removal of medium size class support.
2010-03-18 07:27:39 +08:00
arena->stats.lstats[(size >> PAGE_SHIFT) - 1].ndalloc++;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
arena->stats.lstats[(size >> PAGE_SHIFT) - 1].curruns--;
#endif
}
arena_run_dalloc(arena, (arena_run_t *)ptr, true);
}
static void
arena_ralloc_large_shrink(arena_t *arena, arena_chunk_t *chunk, void *ptr,
Add {,r,s,d}allocm(). Add allocm(), rallocm(), sallocm(), and dallocm(), which are a functional superset of malloc(), calloc(), posix_memalign(), malloc_usable_size(), and free().
2010-09-18 06:46:18 +08:00
size_t oldsize, size_t size)
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
{
assert(size < oldsize);
/*
* Shrink the run, and make trailing pages available for other
* allocations.
*/
malloc_mutex_lock(&arena->lock);
arena_run_trim_tail(arena, chunk, (arena_run_t *)ptr, oldsize, size,
true);
#ifdef JEMALLOC_STATS
Fix large object stats collection bugs.
2010-01-31 19:49:35 +08:00
arena->stats.ndalloc_large++;
arena->stats.allocated_large -= oldsize;
Remove medium size classes. Remove medium size classes, because concurrent dirty page purging is no longer capable of purging inactive dirty pages inside active runs (due to recent arena/bin locking changes). Enhance tcache to support caching large objects, so that the same range of size classes is still cached, despite the removal of medium size class support.
2010-03-18 07:27:39 +08:00
arena->stats.lstats[(oldsize >> PAGE_SHIFT) - 1].ndalloc++;
Fix large object stats collection bugs.
2010-01-31 19:49:35 +08:00
arena->stats.lstats[(oldsize >> PAGE_SHIFT) - 1].curruns--;
arena->stats.nmalloc_large++;
Remove medium size classes. Remove medium size classes, because concurrent dirty page purging is no longer capable of purging inactive dirty pages inside active runs (due to recent arena/bin locking changes). Enhance tcache to support caching large objects, so that the same range of size classes is still cached, despite the removal of medium size class support.
2010-03-18 07:27:39 +08:00
arena->stats.nrequests_large++;
Fix large object stats collection bugs.
2010-01-31 19:49:35 +08:00
arena->stats.allocated_large += size;
Remove medium size classes. Remove medium size classes, because concurrent dirty page purging is no longer capable of purging inactive dirty pages inside active runs (due to recent arena/bin locking changes). Enhance tcache to support caching large objects, so that the same range of size classes is still cached, despite the removal of medium size class support.
2010-03-18 07:27:39 +08:00
arena->stats.lstats[(size >> PAGE_SHIFT) - 1].nmalloc++;
Fix large object stats collection bugs.
2010-01-31 19:49:35 +08:00
arena->stats.lstats[(size >> PAGE_SHIFT) - 1].nrequests++;
arena->stats.lstats[(size >> PAGE_SHIFT) - 1].curruns++;
if (arena->stats.lstats[(size >> PAGE_SHIFT) - 1].curruns >
arena->stats.lstats[(size >> PAGE_SHIFT) - 1].highruns) {
arena->stats.lstats[(size >> PAGE_SHIFT) - 1].highruns =
arena->stats.lstats[(size >> PAGE_SHIFT) - 1].curruns;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
#endif
malloc_mutex_unlock(&arena->lock);
}
static bool
arena_ralloc_large_grow(arena_t *arena, arena_chunk_t *chunk, void *ptr,
Add {,r,s,d}allocm(). Add allocm(), rallocm(), sallocm(), and dallocm(), which are a functional superset of malloc(), calloc(), posix_memalign(), malloc_usable_size(), and free().
2010-09-18 06:46:18 +08:00
size_t oldsize, size_t size, size_t extra, bool zero)
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
{
size_t pageind = ((uintptr_t)ptr - (uintptr_t)chunk) >> PAGE_SHIFT;
size_t npages = oldsize >> PAGE_SHIFT;
Add {,r,s,d}allocm(). Add allocm(), rallocm(), sallocm(), and dallocm(), which are a functional superset of malloc(), calloc(), posix_memalign(), malloc_usable_size(), and free().
2010-09-18 06:46:18 +08:00
size_t followsize;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
assert(oldsize == (chunk->map[pageind-map_bias].bits & ~PAGE_MASK));
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
/* Try to extend the run. */
Add {,r,s,d}allocm(). Add allocm(), rallocm(), sallocm(), and dallocm(), which are a functional superset of malloc(), calloc(), posix_memalign(), malloc_usable_size(), and free().
2010-09-18 06:46:18 +08:00
assert(size + extra > oldsize);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
malloc_mutex_lock(&arena->lock);
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
if (pageind + npages < chunk_npages &&
(chunk->map[pageind+npages-map_bias].bits
Add {,r,s,d}allocm(). Add allocm(), rallocm(), sallocm(), and dallocm(), which are a functional superset of malloc(), calloc(), posix_memalign(), malloc_usable_size(), and free().
2010-09-18 06:46:18 +08:00
& CHUNK_MAP_ALLOCATED) == 0 && (followsize =
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
chunk->map[pageind+npages-map_bias].bits & ~PAGE_MASK) >= size -
oldsize) {
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
/*
* The next run is available and sufficiently large. Split the
* following run, then merge the first part with the existing
* allocation.
*/
Fix numerous arena bugs. In arena_ralloc_large_grow(), update the map element for the end of the newly grown run, rather than the interior map element that was the beginning of the appended run. This is a long-standing bug, and it had the potential to cause massive corruption, but triggering it required roughly the following sequence of events: 1) Large in-place growing realloc(), with left-over space in the run that followed the large object. 2) Allocation of the remainder run left over from (1). 3) Deallocation of the remainder run *before* deallocation of the large run, with unfortunate interior map state left over from previous run allocation/deallocation activity, such that one or more pages of allocated memory would be treated as part of the remainder run during run coalescing. In summary, this was a bad bug, but it was difficult to trigger. In arena_bin_malloc_hard(), if another thread wins the race to allocate a bin run, dispose of the spare run via arena_bin_lower_run() rather than arena_run_dalloc(), since the run has already been prepared for use as a bin run. This bug has existed since March 14, 2010: e00572b384c81bd2aba57fac32f7077a34388915 mmap()/munmap() without arena->lock or bin->lock. Fix bugs in arena_dalloc_bin_run(), arena_trim_head(), arena_trim_tail(), and arena_ralloc_large_grow() that could cause the CHUNK_MAP_UNZEROED map bit to become corrupted. These are all long-standing bugs, but the chances of them actually causing problems was much lower before the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion. Fix a large run statistics regression in arena_ralloc_large_grow() that was introduced on September 17, 2010: 8e3c3c61b5bb676a705450708e7e79698cdc9e0c Add {,r,s,d}allocm(). Add debug code to validate that supposedly pre-zeroed memory really is.
2010-10-18 08:51:37 +08:00
size_t flag_dirty;
Add {,r,s,d}allocm(). Add allocm(), rallocm(), sallocm(), and dallocm(), which are a functional superset of malloc(), calloc(), posix_memalign(), malloc_usable_size(), and free().
2010-09-18 06:46:18 +08:00
size_t splitsize = (oldsize + followsize <= size + extra)
? followsize : size + extra - oldsize;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
arena_run_split(arena, (arena_run_t *)((uintptr_t)chunk +
Add {,r,s,d}allocm(). Add allocm(), rallocm(), sallocm(), and dallocm(), which are a functional superset of malloc(), calloc(), posix_memalign(), malloc_usable_size(), and free().
2010-09-18 06:46:18 +08:00
((pageind+npages) << PAGE_SHIFT)), splitsize, true, zero);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
Fix arena bugs. Split arena_dissociate_bin_run() out of arena_dalloc_bin_run(), so that arena_bin_malloc_hard() can avoid dissociation when recovering from losing a race. This fixes a bug introduced by a recent attempted fix. Fix a regression in arena_ralloc_large_grow() that was introduced by recent fixes.
2010-10-18 15:04:44 +08:00
size = oldsize + splitsize;
npages = size >> PAGE_SHIFT;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
Fix numerous arena bugs. In arena_ralloc_large_grow(), update the map element for the end of the newly grown run, rather than the interior map element that was the beginning of the appended run. This is a long-standing bug, and it had the potential to cause massive corruption, but triggering it required roughly the following sequence of events: 1) Large in-place growing realloc(), with left-over space in the run that followed the large object. 2) Allocation of the remainder run left over from (1). 3) Deallocation of the remainder run *before* deallocation of the large run, with unfortunate interior map state left over from previous run allocation/deallocation activity, such that one or more pages of allocated memory would be treated as part of the remainder run during run coalescing. In summary, this was a bad bug, but it was difficult to trigger. In arena_bin_malloc_hard(), if another thread wins the race to allocate a bin run, dispose of the spare run via arena_bin_lower_run() rather than arena_run_dalloc(), since the run has already been prepared for use as a bin run. This bug has existed since March 14, 2010: e00572b384c81bd2aba57fac32f7077a34388915 mmap()/munmap() without arena->lock or bin->lock. Fix bugs in arena_dalloc_bin_run(), arena_trim_head(), arena_trim_tail(), and arena_ralloc_large_grow() that could cause the CHUNK_MAP_UNZEROED map bit to become corrupted. These are all long-standing bugs, but the chances of them actually causing problems was much lower before the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion. Fix a large run statistics regression in arena_ralloc_large_grow() that was introduced on September 17, 2010: 8e3c3c61b5bb676a705450708e7e79698cdc9e0c Add {,r,s,d}allocm(). Add debug code to validate that supposedly pre-zeroed memory really is.
2010-10-18 08:51:37 +08:00
/*
* Mark the extended run as dirty if either portion of the run
* was dirty before allocation. This is rather pedantic,
* because there's not actually any sequence of events that
* could cause the resulting run to be passed to
* arena_run_dalloc() with the dirty argument set to false
* (which is when dirty flag consistency would really matter).
*/
flag_dirty = (chunk->map[pageind-map_bias].bits &
CHUNK_MAP_DIRTY) |
(chunk->map[pageind+npages-1-map_bias].bits &
CHUNK_MAP_DIRTY);
chunk->map[pageind-map_bias].bits = size | flag_dirty
| CHUNK_MAP_LARGE | CHUNK_MAP_ALLOCATED;
chunk->map[pageind+npages-1-map_bias].bits = flag_dirty |
CHUNK_MAP_LARGE | CHUNK_MAP_ALLOCATED;
Fix large object stats collection bugs.
2010-01-31 19:49:35 +08:00
Fix numerous arena bugs. In arena_ralloc_large_grow(), update the map element for the end of the newly grown run, rather than the interior map element that was the beginning of the appended run. This is a long-standing bug, and it had the potential to cause massive corruption, but triggering it required roughly the following sequence of events: 1) Large in-place growing realloc(), with left-over space in the run that followed the large object. 2) Allocation of the remainder run left over from (1). 3) Deallocation of the remainder run *before* deallocation of the large run, with unfortunate interior map state left over from previous run allocation/deallocation activity, such that one or more pages of allocated memory would be treated as part of the remainder run during run coalescing. In summary, this was a bad bug, but it was difficult to trigger. In arena_bin_malloc_hard(), if another thread wins the race to allocate a bin run, dispose of the spare run via arena_bin_lower_run() rather than arena_run_dalloc(), since the run has already been prepared for use as a bin run. This bug has existed since March 14, 2010: e00572b384c81bd2aba57fac32f7077a34388915 mmap()/munmap() without arena->lock or bin->lock. Fix bugs in arena_dalloc_bin_run(), arena_trim_head(), arena_trim_tail(), and arena_ralloc_large_grow() that could cause the CHUNK_MAP_UNZEROED map bit to become corrupted. These are all long-standing bugs, but the chances of them actually causing problems was much lower before the CHUNK_MAP_ZEROED --> CHUNK_MAP_UNZEROED conversion. Fix a large run statistics regression in arena_ralloc_large_grow() that was introduced on September 17, 2010: 8e3c3c61b5bb676a705450708e7e79698cdc9e0c Add {,r,s,d}allocm(). Add debug code to validate that supposedly pre-zeroed memory really is.
2010-10-18 08:51:37 +08:00
#ifdef JEMALLOC_STATS
arena->stats.ndalloc_large++;
arena->stats.allocated_large -= oldsize;
arena->stats.lstats[(oldsize >> PAGE_SHIFT) - 1].ndalloc++;
arena->stats.lstats[(oldsize >> PAGE_SHIFT) - 1].curruns--;
arena->stats.nmalloc_large++;
arena->stats.nrequests_large++;
arena->stats.allocated_large += size;
arena->stats.lstats[(size >> PAGE_SHIFT) - 1].nmalloc++;
arena->stats.lstats[(size >> PAGE_SHIFT) - 1].nrequests++;
arena->stats.lstats[(size >> PAGE_SHIFT) - 1].curruns++;
if (arena->stats.lstats[(size >> PAGE_SHIFT) - 1].curruns >
arena->stats.lstats[(size >> PAGE_SHIFT) - 1].highruns) {
arena->stats.lstats[(size >> PAGE_SHIFT) - 1].highruns =
arena->stats.lstats[(size >> PAGE_SHIFT) -
1].curruns;
}
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
#endif
malloc_mutex_unlock(&arena->lock);
return (false);
}
malloc_mutex_unlock(&arena->lock);
return (true);
}
/*
* Try to resize a large allocation, in order to avoid copying. This will
* always fail if growing an object, and the following run is already in use.
*/
static bool
Add {,r,s,d}allocm(). Add allocm(), rallocm(), sallocm(), and dallocm(), which are a functional superset of malloc(), calloc(), posix_memalign(), malloc_usable_size(), and free().
2010-09-18 06:46:18 +08:00
arena_ralloc_large(void *ptr, size_t oldsize, size_t size, size_t extra,
bool zero)
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
{
size_t psize;
Add {,r,s,d}allocm(). Add allocm(), rallocm(), sallocm(), and dallocm(), which are a functional superset of malloc(), calloc(), posix_memalign(), malloc_usable_size(), and free().
2010-09-18 06:46:18 +08:00
psize = PAGE_CEILING(size + extra);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
if (psize == oldsize) {
/* Same size class. */
#ifdef JEMALLOC_FILL
if (opt_junk && size < oldsize) {
memset((void *)((uintptr_t)ptr + size), 0x5a, oldsize -
size);
}
#endif
return (false);
} else {
arena_chunk_t *chunk;
arena_t *arena;
chunk = (arena_chunk_t *)CHUNK_ADDR2BASE(ptr);
arena = chunk->arena;
Use bitmaps to track small regions. The previous free list implementation, which embedded singly linked lists in available regions, had the unfortunate side effect of causing many cache misses during thread cache fills. Fix this in two places: - arena_run_t: Use a new bitmap implementation to track which regions are available. Furthermore, revert to preferring the lowest available region (as jemalloc did with its old bitmap-based approach). - tcache_t: Move read-only tcache_bin_t metadata into tcache_bin_info_t, and add a contiguous array of pointers to tcache_t in order to track cached objects. This substantially increases the size of tcache_t, but results in much higher data locality for common tcache operations. As a side benefit, it is again possible to efficiently flush the least recently used cached objects, so this change changes flushing from MRU to LRU. The new bitmap implementation uses a multi-level summary approach to make finding the lowest available region very fast. In practice, bitmaps only have one or two levels, though the implementation is general enough to handle extremely large bitmaps, mainly so that large page sizes can still be entertained. Fix tcache_bin_flush_large() to always flush statistics, in the same way that tcache_bin_flush_small() was recently fixed. Use JEMALLOC_DEBUG rather than NDEBUG. Add dassert(), and use it for debug-only asserts.
2011-03-17 01:30:13 +08:00
dassert(arena->magic == ARENA_MAGIC);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
if (psize < oldsize) {
#ifdef JEMALLOC_FILL
/* Fill before shrinking in order avoid a race. */
if (opt_junk) {
memset((void *)((uintptr_t)ptr + size), 0x5a,
oldsize - size);
}
#endif
Add {,r,s,d}allocm(). Add allocm(), rallocm(), sallocm(), and dallocm(), which are a functional superset of malloc(), calloc(), posix_memalign(), malloc_usable_size(), and free().
2010-09-18 06:46:18 +08:00
arena_ralloc_large_shrink(arena, chunk, ptr, oldsize,
psize);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
return (false);
} else {
bool ret = arena_ralloc_large_grow(arena, chunk, ptr,
Add {,r,s,d}allocm(). Add allocm(), rallocm(), sallocm(), and dallocm(), which are a functional superset of malloc(), calloc(), posix_memalign(), malloc_usable_size(), and free().
2010-09-18 06:46:18 +08:00
oldsize, PAGE_CEILING(size),
psize - PAGE_CEILING(size), zero);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
#ifdef JEMALLOC_FILL
Add {,r,s,d}allocm(). Add allocm(), rallocm(), sallocm(), and dallocm(), which are a functional superset of malloc(), calloc(), posix_memalign(), malloc_usable_size(), and free().
2010-09-18 06:46:18 +08:00
if (ret == false && zero == false && opt_zero) {
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
memset((void *)((uintptr_t)ptr + oldsize), 0,
size - oldsize);
}
#endif
return (ret);
}
}
}
void *
Add {,r,s,d}allocm(). Add allocm(), rallocm(), sallocm(), and dallocm(), which are a functional superset of malloc(), calloc(), posix_memalign(), malloc_usable_size(), and free().
2010-09-18 06:46:18 +08:00
arena_ralloc_no_move(void *ptr, size_t oldsize, size_t size, size_t extra,
bool zero)
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
{
Add {,r,s,d}allocm(). Add allocm(), rallocm(), sallocm(), and dallocm(), which are a functional superset of malloc(), calloc(), posix_memalign(), malloc_usable_size(), and free().
2010-09-18 06:46:18 +08:00
/*
* Avoid moving the allocation if the size class can be left the same.
*/
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
if (oldsize <= arena_maxclass) {
Remove medium size classes. Remove medium size classes, because concurrent dirty page purging is no longer capable of purging inactive dirty pages inside active runs (due to recent arena/bin locking changes). Enhance tcache to support caching large objects, so that the same range of size classes is still cached, despite the removal of medium size class support.
2010-03-18 07:27:39 +08:00
if (oldsize <= small_maxclass) {
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
assert(arena_bin_info[SMALL_SIZE2BIN(oldsize)].reg_size
== oldsize);
Add {,r,s,d}allocm(). Add allocm(), rallocm(), sallocm(), and dallocm(), which are a functional superset of malloc(), calloc(), posix_memalign(), malloc_usable_size(), and free().
2010-09-18 06:46:18 +08:00
if ((size + extra <= small_maxclass &&
Reduce size of small_size2bin lookup table. Convert all direct small_size2bin[...] accesses to SMALL_SIZE2BIN(...) macro calls, and use a couple of cheap math operations to allow compacting the table by 4X or 8X, on 32- and 64-bit systems, respectively.
2011-03-07 14:56:36 +08:00
SMALL_SIZE2BIN(size + extra) ==
SMALL_SIZE2BIN(oldsize)) || (size <= oldsize &&
Add {,r,s,d}allocm(). Add allocm(), rallocm(), sallocm(), and dallocm(), which are a functional superset of malloc(), calloc(), posix_memalign(), malloc_usable_size(), and free().
2010-09-18 06:46:18 +08:00
size + extra >= oldsize)) {
#ifdef JEMALLOC_FILL
if (opt_junk && size < oldsize) {
memset((void *)((uintptr_t)ptr + size),
0x5a, oldsize - size);
}
#endif
return (ptr);
}
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
} else {
assert(size <= arena_maxclass);
Add {,r,s,d}allocm(). Add allocm(), rallocm(), sallocm(), and dallocm(), which are a functional superset of malloc(), calloc(), posix_memalign(), malloc_usable_size(), and free().
2010-09-18 06:46:18 +08:00
if (size + extra > small_maxclass) {
if (arena_ralloc_large(ptr, oldsize, size,
extra, zero) == false)
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
return (ptr);
}
}
}
Add {,r,s,d}allocm(). Add allocm(), rallocm(), sallocm(), and dallocm(), which are a functional superset of malloc(), calloc(), posix_memalign(), malloc_usable_size(), and free().
2010-09-18 06:46:18 +08:00
/* Reallocation would require a move. */
return (NULL);
}
void *
arena_ralloc(void *ptr, size_t oldsize, size_t size, size_t extra,
size_t alignment, bool zero)
{
void *ret;
size_t copysize;
/* Try to avoid moving the allocation. */
ret = arena_ralloc_no_move(ptr, oldsize, size, extra, zero);
if (ret != NULL)
return (ret);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
/*
Add {,r,s,d}allocm(). Add allocm(), rallocm(), sallocm(), and dallocm(), which are a functional superset of malloc(), calloc(), posix_memalign(), malloc_usable_size(), and free().
2010-09-18 06:46:18 +08:00
* size and oldsize are different enough that we need to move the
* object. In that case, fall back to allocating new space and
* copying.
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
*/
Fix error detection for ipalloc() when profiling. sa2u() returns 0 on overflow, but the profiling code was blindly calling sa2u() and allowing the error to silently propagate, ultimately ending in a later assertion failure. Refactor all ipalloc() callers to call sa2u(), check for overflow before calling ipalloc(), and pass usize rather than size. This allows ipalloc() to avoid calling sa2u() in the common case.
2011-03-23 15:37:29 +08:00
if (alignment != 0) {
size_t usize = sa2u(size + extra, alignment, NULL);
if (usize == 0)
return (NULL);
ret = ipalloc(usize, alignment, zero);
} else
Add {,r,s,d}allocm(). Add allocm(), rallocm(), sallocm(), and dallocm(), which are a functional superset of malloc(), calloc(), posix_memalign(), malloc_usable_size(), and free().
2010-09-18 06:46:18 +08:00
ret = arena_malloc(size + extra, zero);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
Add {,r,s,d}allocm(). Add allocm(), rallocm(), sallocm(), and dallocm(), which are a functional superset of malloc(), calloc(), posix_memalign(), malloc_usable_size(), and free().
2010-09-18 06:46:18 +08:00
if (ret == NULL) {
if (extra == 0)
return (NULL);
/* Try again, this time without extra. */
Fix error detection for ipalloc() when profiling. sa2u() returns 0 on overflow, but the profiling code was blindly calling sa2u() and allowing the error to silently propagate, ultimately ending in a later assertion failure. Refactor all ipalloc() callers to call sa2u(), check for overflow before calling ipalloc(), and pass usize rather than size. This allows ipalloc() to avoid calling sa2u() in the common case.
2011-03-23 15:37:29 +08:00
if (alignment != 0) {
size_t usize = sa2u(size, alignment, NULL);
if (usize == 0)
return (NULL);
ret = ipalloc(usize, alignment, zero);
} else
Add {,r,s,d}allocm(). Add allocm(), rallocm(), sallocm(), and dallocm(), which are a functional superset of malloc(), calloc(), posix_memalign(), malloc_usable_size(), and free().
2010-09-18 06:46:18 +08:00
ret = arena_malloc(size, zero);
if (ret == NULL)
return (NULL);
}
/* Junk/zero-filling were already done by ipalloc()/arena_malloc(). */
/*
* Copy at most size bytes (not size+extra), since the caller has no
* expectation that the extra bytes will be reliably preserved.
*/
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
copysize = (size < oldsize) ? size : oldsize;
memcpy(ret, ptr, copysize);
idalloc(ptr);
return (ret);
}
bool
arena_new(arena_t *arena, unsigned ind)
{
unsigned i;
arena_bin_t *bin;
Implement allocation profiling and leack checking. Add the --enable-prof and --enable-prof-libunwind configure options. Add the B/b, F/f, I/i, L/l, and U/u JEMALLOC_OPTIONS. Interval-based profile dump triggering is not yet implemented. Add supporting generic code: * Add memory barriers. * Add prn (LCG PRNG). * Add hash (Murmur hash function). * Add ckh (cuckoo hash tables).
2010-02-11 02:37:56 +08:00
arena->ind = ind;
Improve thread-->arena assignment. Rather than blindly assigning threads to arenas in round-robin fashion, choose the lowest-numbered arena that currently has the smallest number of threads assigned to it. Add the "stats.arenas.<i>.nthreads" mallctl.
2011-03-19 04:41:33 +08:00
arena->nthreads = 0;
Implement allocation profiling and leack checking. Add the --enable-prof and --enable-prof-libunwind configure options. Add the B/b, F/f, I/i, L/l, and U/u JEMALLOC_OPTIONS. Interval-based profile dump triggering is not yet implemented. Add supporting generic code: * Add memory barriers. * Add prn (LCG PRNG). * Add hash (Murmur hash function). * Add ckh (cuckoo hash tables).
2010-02-11 02:37:56 +08:00
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
if (malloc_mutex_init(&arena->lock))
return (true);
#ifdef JEMALLOC_STATS
memset(&arena->stats, 0, sizeof(arena_stats_t));
Remove medium size classes. Remove medium size classes, because concurrent dirty page purging is no longer capable of purging inactive dirty pages inside active runs (due to recent arena/bin locking changes). Enhance tcache to support caching large objects, so that the same range of size classes is still cached, despite the removal of medium size class support.
2010-03-18 07:27:39 +08:00
arena->stats.lstats = (malloc_large_stats_t *)base_alloc(nlclasses *
sizeof(malloc_large_stats_t));
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
if (arena->stats.lstats == NULL)
return (true);
Remove medium size classes. Remove medium size classes, because concurrent dirty page purging is no longer capable of purging inactive dirty pages inside active runs (due to recent arena/bin locking changes). Enhance tcache to support caching large objects, so that the same range of size classes is still cached, despite the removal of medium size class support.
2010-03-18 07:27:39 +08:00
memset(arena->stats.lstats, 0, nlclasses *
sizeof(malloc_large_stats_t));
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
# ifdef JEMALLOC_TCACHE
ql_new(&arena->tcache_ql);
# endif
#endif
Implement interval-based heap profile dumping. Add mallctl interfaces for profiling parameters. Fix a file descriptor leak in heap profile dumping.
2010-02-12 05:19:21 +08:00
#ifdef JEMALLOC_PROF
arena->prof_accumbytes = 0;
#endif
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
/* Initialize chunks. */
Modify dirty page purging algorithm. Convert chunks_dirty from a red-black tree to a doubly linked list, and use it to purge dirty pages from chunks in FIFO order. Add a lock around the code that purges dirty pages via madvise(2), in order to avoid kernel contention. If lock acquisition fails, indefinitely postpone purging dirty pages. Add a lower limit of one chunk worth of dirty pages per arena for purging, in addition to the active:dirty ratio. When purging, purge all dirty pages from at least one chunk, but rather than purging enough pages to drop to half the purging threshold, merely drop to the threshold.
2010-03-05 13:35:07 +08:00
ql_new(&arena->chunks_dirty);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
arena->spare = NULL;
arena->nactive = 0;
arena->ndirty = 0;
Revert re-addition of purge_lock. Linux kernels have been capable of concurrent page table access since 2.6.27, so this hack is not necessary for modern kernels.
2010-04-09 11:31:58 +08:00
arena->npurgatory = 0;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
Track dirty and clean runs separately. Split arena->runs_avail into arena->runs_avail_{clean,dirty}, and preferentially allocate dirty runs.
2010-03-19 11:36:40 +08:00
arena_avail_tree_new(&arena->runs_avail_clean);
arena_avail_tree_new(&arena->runs_avail_dirty);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
/* Initialize bins. */
i = 0;
#ifdef JEMALLOC_TINY
/* (2^n)-spaced tiny bins. */
for (; i < ntbins; i++) {
bin = &arena->bins[i];
Push locks into arena bins. For bin-related allocation, protect data structures with bin locks rather than arena locks. Arena locks remain for run allocation/deallocation and other miscellaneous operations. Restructure statistics counters to maintain per bin allocated/nmalloc/ndalloc, but continue to provide arena-wide statistics via aggregation in the ctl code.
2010-03-14 12:32:56 +08:00
if (malloc_mutex_init(&bin->lock))
return (true);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
bin->runcur = NULL;
arena_run_tree_new(&bin->runs);
#ifdef JEMALLOC_STATS
memset(&bin->stats, 0, sizeof(malloc_bin_stats_t));
#endif
}
#endif
/* Quantum-spaced bins. */
for (; i < ntbins + nqbins; i++) {
bin = &arena->bins[i];
Push locks into arena bins. For bin-related allocation, protect data structures with bin locks rather than arena locks. Arena locks remain for run allocation/deallocation and other miscellaneous operations. Restructure statistics counters to maintain per bin allocated/nmalloc/ndalloc, but continue to provide arena-wide statistics via aggregation in the ctl code.
2010-03-14 12:32:56 +08:00
if (malloc_mutex_init(&bin->lock))
return (true);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
bin->runcur = NULL;
arena_run_tree_new(&bin->runs);
#ifdef JEMALLOC_STATS
memset(&bin->stats, 0, sizeof(malloc_bin_stats_t));
#endif
}
/* Cacheline-spaced bins. */
for (; i < ntbins + nqbins + ncbins; i++) {
bin = &arena->bins[i];
Push locks into arena bins. For bin-related allocation, protect data structures with bin locks rather than arena locks. Arena locks remain for run allocation/deallocation and other miscellaneous operations. Restructure statistics counters to maintain per bin allocated/nmalloc/ndalloc, but continue to provide arena-wide statistics via aggregation in the ctl code.
2010-03-14 12:32:56 +08:00
if (malloc_mutex_init(&bin->lock))
return (true);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
bin->runcur = NULL;
arena_run_tree_new(&bin->runs);
#ifdef JEMALLOC_STATS
memset(&bin->stats, 0, sizeof(malloc_bin_stats_t));
#endif
}
/* Subpage-spaced bins. */
Remove medium size classes. Remove medium size classes, because concurrent dirty page purging is no longer capable of purging inactive dirty pages inside active runs (due to recent arena/bin locking changes). Enhance tcache to support caching large objects, so that the same range of size classes is still cached, despite the removal of medium size class support.
2010-03-18 07:27:39 +08:00
for (; i < nbins; i++) {
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
bin = &arena->bins[i];
Push locks into arena bins. For bin-related allocation, protect data structures with bin locks rather than arena locks. Arena locks remain for run allocation/deallocation and other miscellaneous operations. Restructure statistics counters to maintain per bin allocated/nmalloc/ndalloc, but continue to provide arena-wide statistics via aggregation in the ctl code.
2010-03-14 12:32:56 +08:00
if (malloc_mutex_init(&bin->lock))
return (true);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
bin->runcur = NULL;
arena_run_tree_new(&bin->runs);
#ifdef JEMALLOC_STATS
memset(&bin->stats, 0, sizeof(malloc_bin_stats_t));
#endif
}
#ifdef JEMALLOC_DEBUG
arena->magic = ARENA_MAGIC;
#endif
return (false);
}
#ifdef JEMALLOC_DEBUG
static void
small_size2bin_validate(void)
{
size_t i, size, binind;
i = 1;
# ifdef JEMALLOC_TINY
/* Tiny. */
for (; i < (1U << LG_TINY_MIN); i++) {
size = pow2_ceil(1U << LG_TINY_MIN);
binind = ffs((int)(size >> (LG_TINY_MIN + 1)));
Reduce size of small_size2bin lookup table. Convert all direct small_size2bin[...] accesses to SMALL_SIZE2BIN(...) macro calls, and use a couple of cheap math operations to allow compacting the table by 4X or 8X, on 32- and 64-bit systems, respectively.
2011-03-07 14:56:36 +08:00
assert(SMALL_SIZE2BIN(i) == binind);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
for (; i < qspace_min; i++) {
size = pow2_ceil(i);
binind = ffs((int)(size >> (LG_TINY_MIN + 1)));
Reduce size of small_size2bin lookup table. Convert all direct small_size2bin[...] accesses to SMALL_SIZE2BIN(...) macro calls, and use a couple of cheap math operations to allow compacting the table by 4X or 8X, on 32- and 64-bit systems, respectively.
2011-03-07 14:56:36 +08:00
assert(SMALL_SIZE2BIN(i) == binind);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
# endif
/* Quantum-spaced. */
for (; i <= qspace_max; i++) {
size = QUANTUM_CEILING(i);
binind = ntbins + (size >> LG_QUANTUM) - 1;
Reduce size of small_size2bin lookup table. Convert all direct small_size2bin[...] accesses to SMALL_SIZE2BIN(...) macro calls, and use a couple of cheap math operations to allow compacting the table by 4X or 8X, on 32- and 64-bit systems, respectively.
2011-03-07 14:56:36 +08:00
assert(SMALL_SIZE2BIN(i) == binind);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
/* Cacheline-spaced. */
for (; i <= cspace_max; i++) {
size = CACHELINE_CEILING(i);
binind = ntbins + nqbins + ((size - cspace_min) >>
LG_CACHELINE);
Reduce size of small_size2bin lookup table. Convert all direct small_size2bin[...] accesses to SMALL_SIZE2BIN(...) macro calls, and use a couple of cheap math operations to allow compacting the table by 4X or 8X, on 32- and 64-bit systems, respectively.
2011-03-07 14:56:36 +08:00
assert(SMALL_SIZE2BIN(i) == binind);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
/* Sub-page. */
for (; i <= sspace_max; i++) {
size = SUBPAGE_CEILING(i);
binind = ntbins + nqbins + ncbins + ((size - sspace_min)
>> LG_SUBPAGE);
Reduce size of small_size2bin lookup table. Convert all direct small_size2bin[...] accesses to SMALL_SIZE2BIN(...) macro calls, and use a couple of cheap math operations to allow compacting the table by 4X or 8X, on 32- and 64-bit systems, respectively.
2011-03-07 14:56:36 +08:00
assert(SMALL_SIZE2BIN(i) == binind);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
}
#endif
static bool
small_size2bin_init(void)
{
if (opt_lg_qspace_max != LG_QSPACE_MAX_DEFAULT
|| opt_lg_cspace_max != LG_CSPACE_MAX_DEFAULT
Reduce size of small_size2bin lookup table. Convert all direct small_size2bin[...] accesses to SMALL_SIZE2BIN(...) macro calls, and use a couple of cheap math operations to allow compacting the table by 4X or 8X, on 32- and 64-bit systems, respectively.
2011-03-07 14:56:36 +08:00
|| (sizeof(const_small_size2bin) != ((small_maxclass-1) >>
LG_TINY_MIN) + 1))
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
return (small_size2bin_init_hard());
small_size2bin = const_small_size2bin;
#ifdef JEMALLOC_DEBUG
small_size2bin_validate();
#endif
return (false);
}
static bool
small_size2bin_init_hard(void)
{
size_t i, size, binind;
uint8_t *custom_small_size2bin;
Reduce size of small_size2bin lookup table. Convert all direct small_size2bin[...] accesses to SMALL_SIZE2BIN(...) macro calls, and use a couple of cheap math operations to allow compacting the table by 4X or 8X, on 32- and 64-bit systems, respectively.
2011-03-07 14:56:36 +08:00
#define CUSTOM_SMALL_SIZE2BIN(s) \
custom_small_size2bin[(s-1) >> LG_TINY_MIN]
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
assert(opt_lg_qspace_max != LG_QSPACE_MAX_DEFAULT
|| opt_lg_cspace_max != LG_CSPACE_MAX_DEFAULT
Reduce size of small_size2bin lookup table. Convert all direct small_size2bin[...] accesses to SMALL_SIZE2BIN(...) macro calls, and use a couple of cheap math operations to allow compacting the table by 4X or 8X, on 32- and 64-bit systems, respectively.
2011-03-07 14:56:36 +08:00
|| (sizeof(const_small_size2bin) != ((small_maxclass-1) >>
LG_TINY_MIN) + 1));
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
Reduce size of small_size2bin lookup table. Convert all direct small_size2bin[...] accesses to SMALL_SIZE2BIN(...) macro calls, and use a couple of cheap math operations to allow compacting the table by 4X or 8X, on 32- and 64-bit systems, respectively.
2011-03-07 14:56:36 +08:00
custom_small_size2bin = (uint8_t *)
base_alloc(small_maxclass >> LG_TINY_MIN);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
if (custom_small_size2bin == NULL)
return (true);
i = 1;
#ifdef JEMALLOC_TINY
/* Tiny. */
Reduce size of small_size2bin lookup table. Convert all direct small_size2bin[...] accesses to SMALL_SIZE2BIN(...) macro calls, and use a couple of cheap math operations to allow compacting the table by 4X or 8X, on 32- and 64-bit systems, respectively.
2011-03-07 14:56:36 +08:00
for (; i < (1U << LG_TINY_MIN); i += TINY_MIN) {
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
size = pow2_ceil(1U << LG_TINY_MIN);
binind = ffs((int)(size >> (LG_TINY_MIN + 1)));
Reduce size of small_size2bin lookup table. Convert all direct small_size2bin[...] accesses to SMALL_SIZE2BIN(...) macro calls, and use a couple of cheap math operations to allow compacting the table by 4X or 8X, on 32- and 64-bit systems, respectively.
2011-03-07 14:56:36 +08:00
CUSTOM_SMALL_SIZE2BIN(i) = binind;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
Reduce size of small_size2bin lookup table. Convert all direct small_size2bin[...] accesses to SMALL_SIZE2BIN(...) macro calls, and use a couple of cheap math operations to allow compacting the table by 4X or 8X, on 32- and 64-bit systems, respectively.
2011-03-07 14:56:36 +08:00
for (; i < qspace_min; i += TINY_MIN) {
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
size = pow2_ceil(i);
binind = ffs((int)(size >> (LG_TINY_MIN + 1)));
Reduce size of small_size2bin lookup table. Convert all direct small_size2bin[...] accesses to SMALL_SIZE2BIN(...) macro calls, and use a couple of cheap math operations to allow compacting the table by 4X or 8X, on 32- and 64-bit systems, respectively.
2011-03-07 14:56:36 +08:00
CUSTOM_SMALL_SIZE2BIN(i) = binind;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
#endif
/* Quantum-spaced. */
Reduce size of small_size2bin lookup table. Convert all direct small_size2bin[...] accesses to SMALL_SIZE2BIN(...) macro calls, and use a couple of cheap math operations to allow compacting the table by 4X or 8X, on 32- and 64-bit systems, respectively.
2011-03-07 14:56:36 +08:00
for (; i <= qspace_max; i += TINY_MIN) {
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
size = QUANTUM_CEILING(i);
binind = ntbins + (size >> LG_QUANTUM) - 1;
Reduce size of small_size2bin lookup table. Convert all direct small_size2bin[...] accesses to SMALL_SIZE2BIN(...) macro calls, and use a couple of cheap math operations to allow compacting the table by 4X or 8X, on 32- and 64-bit systems, respectively.
2011-03-07 14:56:36 +08:00
CUSTOM_SMALL_SIZE2BIN(i) = binind;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
/* Cacheline-spaced. */
Reduce size of small_size2bin lookup table. Convert all direct small_size2bin[...] accesses to SMALL_SIZE2BIN(...) macro calls, and use a couple of cheap math operations to allow compacting the table by 4X or 8X, on 32- and 64-bit systems, respectively.
2011-03-07 14:56:36 +08:00
for (; i <= cspace_max; i += TINY_MIN) {
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
size = CACHELINE_CEILING(i);
binind = ntbins + nqbins + ((size - cspace_min) >>
LG_CACHELINE);
Reduce size of small_size2bin lookup table. Convert all direct small_size2bin[...] accesses to SMALL_SIZE2BIN(...) macro calls, and use a couple of cheap math operations to allow compacting the table by 4X or 8X, on 32- and 64-bit systems, respectively.
2011-03-07 14:56:36 +08:00
CUSTOM_SMALL_SIZE2BIN(i) = binind;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
/* Sub-page. */
Reduce size of small_size2bin lookup table. Convert all direct small_size2bin[...] accesses to SMALL_SIZE2BIN(...) macro calls, and use a couple of cheap math operations to allow compacting the table by 4X or 8X, on 32- and 64-bit systems, respectively.
2011-03-07 14:56:36 +08:00
for (; i <= sspace_max; i += TINY_MIN) {
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
size = SUBPAGE_CEILING(i);
binind = ntbins + nqbins + ncbins + ((size - sspace_min) >>
LG_SUBPAGE);
Reduce size of small_size2bin lookup table. Convert all direct small_size2bin[...] accesses to SMALL_SIZE2BIN(...) macro calls, and use a couple of cheap math operations to allow compacting the table by 4X or 8X, on 32- and 64-bit systems, respectively.
2011-03-07 14:56:36 +08:00
CUSTOM_SMALL_SIZE2BIN(i) = binind;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
small_size2bin = custom_small_size2bin;
#ifdef JEMALLOC_DEBUG
small_size2bin_validate();
#endif
return (false);
Reduce size of small_size2bin lookup table. Convert all direct small_size2bin[...] accesses to SMALL_SIZE2BIN(...) macro calls, and use a couple of cheap math operations to allow compacting the table by 4X or 8X, on 32- and 64-bit systems, respectively.
2011-03-07 14:56:36 +08:00
#undef CUSTOM_SMALL_SIZE2BIN
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
/*
* Calculate bin_info->run_size such that it meets the following constraints:
*
* *) bin_info->run_size >= min_run_size
* *) bin_info->run_size <= arena_maxclass
* *) run header overhead <= RUN_MAX_OVRHD (or header overhead relaxed).
Avoid overflow in arena_run_regind(). Fix a regression due to: Remove an arena_bin_run_size_calc() constraint. 2a6f2af6e446a98a635caadd281a23ca09a491cb The removed constraint required that small run headers fit in one page, which indirectly limited runs such that they would not cause overflow in arena_run_regind(). Add an explicit constraint to arena_bin_run_size_calc() based on the largest number of regions that arena_run_regind() can handle (2^11 as currently configured).
2011-03-23 00:00:56 +08:00
* *) bin_info->nregs <= RUN_MAXREGS
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
*
Use bitmaps to track small regions. The previous free list implementation, which embedded singly linked lists in available regions, had the unfortunate side effect of causing many cache misses during thread cache fills. Fix this in two places: - arena_run_t: Use a new bitmap implementation to track which regions are available. Furthermore, revert to preferring the lowest available region (as jemalloc did with its old bitmap-based approach). - tcache_t: Move read-only tcache_bin_t metadata into tcache_bin_info_t, and add a contiguous array of pointers to tcache_t in order to track cached objects. This substantially increases the size of tcache_t, but results in much higher data locality for common tcache operations. As a side benefit, it is again possible to efficiently flush the least recently used cached objects, so this change changes flushing from MRU to LRU. The new bitmap implementation uses a multi-level summary approach to make finding the lowest available region very fast. In practice, bitmaps only have one or two levels, though the implementation is general enough to handle extremely large bitmaps, mainly so that large page sizes can still be entertained. Fix tcache_bin_flush_large() to always flush statistics, in the same way that tcache_bin_flush_small() was recently fixed. Use JEMALLOC_DEBUG rather than NDEBUG. Add dassert(), and use it for debug-only asserts.
2011-03-17 01:30:13 +08:00
* bin_info->nregs, bin_info->bitmap_offset, and bin_info->reg0_offset are also
* calculated here, since these settings are all interdependent.
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
*/
static size_t
bin_info_run_size_calc(arena_bin_info_t *bin_info, size_t min_run_size)
{
size_t try_run_size, good_run_size;
uint32_t try_nregs, good_nregs;
uint32_t try_hdr_size, good_hdr_size;
Use bitmaps to track small regions. The previous free list implementation, which embedded singly linked lists in available regions, had the unfortunate side effect of causing many cache misses during thread cache fills. Fix this in two places: - arena_run_t: Use a new bitmap implementation to track which regions are available. Furthermore, revert to preferring the lowest available region (as jemalloc did with its old bitmap-based approach). - tcache_t: Move read-only tcache_bin_t metadata into tcache_bin_info_t, and add a contiguous array of pointers to tcache_t in order to track cached objects. This substantially increases the size of tcache_t, but results in much higher data locality for common tcache operations. As a side benefit, it is again possible to efficiently flush the least recently used cached objects, so this change changes flushing from MRU to LRU. The new bitmap implementation uses a multi-level summary approach to make finding the lowest available region very fast. In practice, bitmaps only have one or two levels, though the implementation is general enough to handle extremely large bitmaps, mainly so that large page sizes can still be entertained. Fix tcache_bin_flush_large() to always flush statistics, in the same way that tcache_bin_flush_small() was recently fixed. Use JEMALLOC_DEBUG rather than NDEBUG. Add dassert(), and use it for debug-only asserts.
2011-03-17 01:30:13 +08:00
uint32_t try_bitmap_offset, good_bitmap_offset;
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
#ifdef JEMALLOC_PROF
uint32_t try_ctx0_offset, good_ctx0_offset;
#endif
uint32_t try_reg0_offset, good_reg0_offset;
assert(min_run_size >= PAGE_SIZE);
assert(min_run_size <= arena_maxclass);
/*
* Calculate known-valid settings before entering the run_size
* expansion loop, so that the first part of the loop always copies
* valid settings.
*
* The do..while loop iteratively reduces the number of regions until
* the run header and the regions no longer overlap. A closed formula
* would be quite messy, since there is an interdependency between the
* header's mask length and the number of regions.
*/
try_run_size = min_run_size;
try_nregs = ((try_run_size - sizeof(arena_run_t)) / bin_info->reg_size)
+ 1; /* Counter-act try_nregs-- in loop. */
Avoid overflow in arena_run_regind(). Fix a regression due to: Remove an arena_bin_run_size_calc() constraint. 2a6f2af6e446a98a635caadd281a23ca09a491cb The removed constraint required that small run headers fit in one page, which indirectly limited runs such that they would not cause overflow in arena_run_regind(). Add an explicit constraint to arena_bin_run_size_calc() based on the largest number of regions that arena_run_regind() can handle (2^11 as currently configured).
2011-03-23 00:00:56 +08:00
if (try_nregs > RUN_MAXREGS) {
try_nregs = RUN_MAXREGS
+ 1; /* Counter-act try_nregs-- in loop. */
}
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
do {
try_nregs--;
try_hdr_size = sizeof(arena_run_t);
Use bitmaps to track small regions. The previous free list implementation, which embedded singly linked lists in available regions, had the unfortunate side effect of causing many cache misses during thread cache fills. Fix this in two places: - arena_run_t: Use a new bitmap implementation to track which regions are available. Furthermore, revert to preferring the lowest available region (as jemalloc did with its old bitmap-based approach). - tcache_t: Move read-only tcache_bin_t metadata into tcache_bin_info_t, and add a contiguous array of pointers to tcache_t in order to track cached objects. This substantially increases the size of tcache_t, but results in much higher data locality for common tcache operations. As a side benefit, it is again possible to efficiently flush the least recently used cached objects, so this change changes flushing from MRU to LRU. The new bitmap implementation uses a multi-level summary approach to make finding the lowest available region very fast. In practice, bitmaps only have one or two levels, though the implementation is general enough to handle extremely large bitmaps, mainly so that large page sizes can still be entertained. Fix tcache_bin_flush_large() to always flush statistics, in the same way that tcache_bin_flush_small() was recently fixed. Use JEMALLOC_DEBUG rather than NDEBUG. Add dassert(), and use it for debug-only asserts.
2011-03-17 01:30:13 +08:00
/* Pad to a long boundary. */
try_hdr_size = LONG_CEILING(try_hdr_size);
try_bitmap_offset = try_hdr_size;
/* Add space for bitmap. */
try_hdr_size += bitmap_size(try_nregs);
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
#ifdef JEMALLOC_PROF
if (opt_prof && prof_promote == false) {
/* Pad to a quantum boundary. */
try_hdr_size = QUANTUM_CEILING(try_hdr_size);
try_ctx0_offset = try_hdr_size;
/* Add space for one (prof_ctx_t *) per region. */
try_hdr_size += try_nregs * sizeof(prof_ctx_t *);
} else
try_ctx0_offset = 0;
#endif
try_reg0_offset = try_run_size - (try_nregs *
bin_info->reg_size);
} while (try_hdr_size > try_reg0_offset);
/* run_size expansion loop. */
do {
/*
* Copy valid settings before trying more aggressive settings.
*/
good_run_size = try_run_size;
good_nregs = try_nregs;
good_hdr_size = try_hdr_size;
Use bitmaps to track small regions. The previous free list implementation, which embedded singly linked lists in available regions, had the unfortunate side effect of causing many cache misses during thread cache fills. Fix this in two places: - arena_run_t: Use a new bitmap implementation to track which regions are available. Furthermore, revert to preferring the lowest available region (as jemalloc did with its old bitmap-based approach). - tcache_t: Move read-only tcache_bin_t metadata into tcache_bin_info_t, and add a contiguous array of pointers to tcache_t in order to track cached objects. This substantially increases the size of tcache_t, but results in much higher data locality for common tcache operations. As a side benefit, it is again possible to efficiently flush the least recently used cached objects, so this change changes flushing from MRU to LRU. The new bitmap implementation uses a multi-level summary approach to make finding the lowest available region very fast. In practice, bitmaps only have one or two levels, though the implementation is general enough to handle extremely large bitmaps, mainly so that large page sizes can still be entertained. Fix tcache_bin_flush_large() to always flush statistics, in the same way that tcache_bin_flush_small() was recently fixed. Use JEMALLOC_DEBUG rather than NDEBUG. Add dassert(), and use it for debug-only asserts.
2011-03-17 01:30:13 +08:00
good_bitmap_offset = try_bitmap_offset;
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
#ifdef JEMALLOC_PROF
good_ctx0_offset = try_ctx0_offset;
#endif
good_reg0_offset = try_reg0_offset;
/* Try more aggressive settings. */
try_run_size += PAGE_SIZE;
try_nregs = ((try_run_size - sizeof(arena_run_t)) /
bin_info->reg_size)
+ 1; /* Counter-act try_nregs-- in loop. */
Avoid overflow in arena_run_regind(). Fix a regression due to: Remove an arena_bin_run_size_calc() constraint. 2a6f2af6e446a98a635caadd281a23ca09a491cb The removed constraint required that small run headers fit in one page, which indirectly limited runs such that they would not cause overflow in arena_run_regind(). Add an explicit constraint to arena_bin_run_size_calc() based on the largest number of regions that arena_run_regind() can handle (2^11 as currently configured).
2011-03-23 00:00:56 +08:00
if (try_nregs > RUN_MAXREGS) {
try_nregs = RUN_MAXREGS
+ 1; /* Counter-act try_nregs-- in loop. */
}
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
do {
try_nregs--;
try_hdr_size = sizeof(arena_run_t);
Use bitmaps to track small regions. The previous free list implementation, which embedded singly linked lists in available regions, had the unfortunate side effect of causing many cache misses during thread cache fills. Fix this in two places: - arena_run_t: Use a new bitmap implementation to track which regions are available. Furthermore, revert to preferring the lowest available region (as jemalloc did with its old bitmap-based approach). - tcache_t: Move read-only tcache_bin_t metadata into tcache_bin_info_t, and add a contiguous array of pointers to tcache_t in order to track cached objects. This substantially increases the size of tcache_t, but results in much higher data locality for common tcache operations. As a side benefit, it is again possible to efficiently flush the least recently used cached objects, so this change changes flushing from MRU to LRU. The new bitmap implementation uses a multi-level summary approach to make finding the lowest available region very fast. In practice, bitmaps only have one or two levels, though the implementation is general enough to handle extremely large bitmaps, mainly so that large page sizes can still be entertained. Fix tcache_bin_flush_large() to always flush statistics, in the same way that tcache_bin_flush_small() was recently fixed. Use JEMALLOC_DEBUG rather than NDEBUG. Add dassert(), and use it for debug-only asserts.
2011-03-17 01:30:13 +08:00
/* Pad to a long boundary. */
try_hdr_size = LONG_CEILING(try_hdr_size);
try_bitmap_offset = try_hdr_size;
/* Add space for bitmap. */
try_hdr_size += bitmap_size(try_nregs);
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
#ifdef JEMALLOC_PROF
if (opt_prof && prof_promote == false) {
/* Pad to a quantum boundary. */
try_hdr_size = QUANTUM_CEILING(try_hdr_size);
try_ctx0_offset = try_hdr_size;
/*
* Add space for one (prof_ctx_t *) per region.
*/
try_hdr_size += try_nregs *
sizeof(prof_ctx_t *);
}
#endif
try_reg0_offset = try_run_size - (try_nregs *
bin_info->reg_size);
} while (try_hdr_size > try_reg0_offset);
} while (try_run_size <= arena_maxclass
&& try_run_size <= arena_maxclass
&& RUN_MAX_OVRHD * (bin_info->reg_size << 3) > RUN_MAX_OVRHD_RELAX
Avoid overflow in arena_run_regind(). Fix a regression due to: Remove an arena_bin_run_size_calc() constraint. 2a6f2af6e446a98a635caadd281a23ca09a491cb The removed constraint required that small run headers fit in one page, which indirectly limited runs such that they would not cause overflow in arena_run_regind(). Add an explicit constraint to arena_bin_run_size_calc() based on the largest number of regions that arena_run_regind() can handle (2^11 as currently configured).
2011-03-23 00:00:56 +08:00
&& (try_reg0_offset << RUN_BFP) > RUN_MAX_OVRHD * try_run_size
&& try_nregs < RUN_MAXREGS);
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
assert(good_hdr_size <= good_reg0_offset);
/* Copy final settings. */
bin_info->run_size = good_run_size;
bin_info->nregs = good_nregs;
Use bitmaps to track small regions. The previous free list implementation, which embedded singly linked lists in available regions, had the unfortunate side effect of causing many cache misses during thread cache fills. Fix this in two places: - arena_run_t: Use a new bitmap implementation to track which regions are available. Furthermore, revert to preferring the lowest available region (as jemalloc did with its old bitmap-based approach). - tcache_t: Move read-only tcache_bin_t metadata into tcache_bin_info_t, and add a contiguous array of pointers to tcache_t in order to track cached objects. This substantially increases the size of tcache_t, but results in much higher data locality for common tcache operations. As a side benefit, it is again possible to efficiently flush the least recently used cached objects, so this change changes flushing from MRU to LRU. The new bitmap implementation uses a multi-level summary approach to make finding the lowest available region very fast. In practice, bitmaps only have one or two levels, though the implementation is general enough to handle extremely large bitmaps, mainly so that large page sizes can still be entertained. Fix tcache_bin_flush_large() to always flush statistics, in the same way that tcache_bin_flush_small() was recently fixed. Use JEMALLOC_DEBUG rather than NDEBUG. Add dassert(), and use it for debug-only asserts.
2011-03-17 01:30:13 +08:00
bin_info->bitmap_offset = good_bitmap_offset;
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
#ifdef JEMALLOC_PROF
bin_info->ctx0_offset = good_ctx0_offset;
#endif
bin_info->reg0_offset = good_reg0_offset;
return (good_run_size);
}
static bool
bin_info_init(void)
{
arena_bin_info_t *bin_info;
unsigned i;
size_t prev_run_size;
arena_bin_info = base_alloc(sizeof(arena_bin_info_t) * nbins);
if (arena_bin_info == NULL)
return (true);
prev_run_size = PAGE_SIZE;
i = 0;
#ifdef JEMALLOC_TINY
/* (2^n)-spaced tiny bins. */
for (; i < ntbins; i++) {
bin_info = &arena_bin_info[i];
bin_info->reg_size = (1U << (LG_TINY_MIN + i));
prev_run_size = bin_info_run_size_calc(bin_info, prev_run_size);
Use bitmaps to track small regions. The previous free list implementation, which embedded singly linked lists in available regions, had the unfortunate side effect of causing many cache misses during thread cache fills. Fix this in two places: - arena_run_t: Use a new bitmap implementation to track which regions are available. Furthermore, revert to preferring the lowest available region (as jemalloc did with its old bitmap-based approach). - tcache_t: Move read-only tcache_bin_t metadata into tcache_bin_info_t, and add a contiguous array of pointers to tcache_t in order to track cached objects. This substantially increases the size of tcache_t, but results in much higher data locality for common tcache operations. As a side benefit, it is again possible to efficiently flush the least recently used cached objects, so this change changes flushing from MRU to LRU. The new bitmap implementation uses a multi-level summary approach to make finding the lowest available region very fast. In practice, bitmaps only have one or two levels, though the implementation is general enough to handle extremely large bitmaps, mainly so that large page sizes can still be entertained. Fix tcache_bin_flush_large() to always flush statistics, in the same way that tcache_bin_flush_small() was recently fixed. Use JEMALLOC_DEBUG rather than NDEBUG. Add dassert(), and use it for debug-only asserts.
2011-03-17 01:30:13 +08:00
bitmap_info_init(&bin_info->bitmap_info, bin_info->nregs);
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
}
#endif
/* Quantum-spaced bins. */
for (; i < ntbins + nqbins; i++) {
bin_info = &arena_bin_info[i];
bin_info->reg_size = (i - ntbins + 1) << LG_QUANTUM;
prev_run_size = bin_info_run_size_calc(bin_info, prev_run_size);
Use bitmaps to track small regions. The previous free list implementation, which embedded singly linked lists in available regions, had the unfortunate side effect of causing many cache misses during thread cache fills. Fix this in two places: - arena_run_t: Use a new bitmap implementation to track which regions are available. Furthermore, revert to preferring the lowest available region (as jemalloc did with its old bitmap-based approach). - tcache_t: Move read-only tcache_bin_t metadata into tcache_bin_info_t, and add a contiguous array of pointers to tcache_t in order to track cached objects. This substantially increases the size of tcache_t, but results in much higher data locality for common tcache operations. As a side benefit, it is again possible to efficiently flush the least recently used cached objects, so this change changes flushing from MRU to LRU. The new bitmap implementation uses a multi-level summary approach to make finding the lowest available region very fast. In practice, bitmaps only have one or two levels, though the implementation is general enough to handle extremely large bitmaps, mainly so that large page sizes can still be entertained. Fix tcache_bin_flush_large() to always flush statistics, in the same way that tcache_bin_flush_small() was recently fixed. Use JEMALLOC_DEBUG rather than NDEBUG. Add dassert(), and use it for debug-only asserts.
2011-03-17 01:30:13 +08:00
bitmap_info_init(&bin_info->bitmap_info, bin_info->nregs);
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
}
/* Cacheline-spaced bins. */
for (; i < ntbins + nqbins + ncbins; i++) {
bin_info = &arena_bin_info[i];
bin_info->reg_size = cspace_min + ((i - (ntbins + nqbins)) <<
LG_CACHELINE);
prev_run_size = bin_info_run_size_calc(bin_info, prev_run_size);
Use bitmaps to track small regions. The previous free list implementation, which embedded singly linked lists in available regions, had the unfortunate side effect of causing many cache misses during thread cache fills. Fix this in two places: - arena_run_t: Use a new bitmap implementation to track which regions are available. Furthermore, revert to preferring the lowest available region (as jemalloc did with its old bitmap-based approach). - tcache_t: Move read-only tcache_bin_t metadata into tcache_bin_info_t, and add a contiguous array of pointers to tcache_t in order to track cached objects. This substantially increases the size of tcache_t, but results in much higher data locality for common tcache operations. As a side benefit, it is again possible to efficiently flush the least recently used cached objects, so this change changes flushing from MRU to LRU. The new bitmap implementation uses a multi-level summary approach to make finding the lowest available region very fast. In practice, bitmaps only have one or two levels, though the implementation is general enough to handle extremely large bitmaps, mainly so that large page sizes can still be entertained. Fix tcache_bin_flush_large() to always flush statistics, in the same way that tcache_bin_flush_small() was recently fixed. Use JEMALLOC_DEBUG rather than NDEBUG. Add dassert(), and use it for debug-only asserts.
2011-03-17 01:30:13 +08:00
bitmap_info_init(&bin_info->bitmap_info, bin_info->nregs);
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
}
/* Subpage-spaced bins. */
for (; i < nbins; i++) {
bin_info = &arena_bin_info[i];
bin_info->reg_size = sspace_min + ((i - (ntbins + nqbins +
ncbins)) << LG_SUBPAGE);
prev_run_size = bin_info_run_size_calc(bin_info, prev_run_size);
Use bitmaps to track small regions. The previous free list implementation, which embedded singly linked lists in available regions, had the unfortunate side effect of causing many cache misses during thread cache fills. Fix this in two places: - arena_run_t: Use a new bitmap implementation to track which regions are available. Furthermore, revert to preferring the lowest available region (as jemalloc did with its old bitmap-based approach). - tcache_t: Move read-only tcache_bin_t metadata into tcache_bin_info_t, and add a contiguous array of pointers to tcache_t in order to track cached objects. This substantially increases the size of tcache_t, but results in much higher data locality for common tcache operations. As a side benefit, it is again possible to efficiently flush the least recently used cached objects, so this change changes flushing from MRU to LRU. The new bitmap implementation uses a multi-level summary approach to make finding the lowest available region very fast. In practice, bitmaps only have one or two levels, though the implementation is general enough to handle extremely large bitmaps, mainly so that large page sizes can still be entertained. Fix tcache_bin_flush_large() to always flush statistics, in the same way that tcache_bin_flush_small() was recently fixed. Use JEMALLOC_DEBUG rather than NDEBUG. Add dassert(), and use it for debug-only asserts.
2011-03-17 01:30:13 +08:00
bitmap_info_init(&bin_info->bitmap_info, bin_info->nregs);
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
}
return (false);
}
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
bool
Fix bootstrapping crash. If a custom small_size2bin table was required due to non-default size class settings, memory allocation prior to initializing chunk parameters would cause a crash due to division by 0. The fix re-orders the various *_boot() function calls. Bootstrapping is simpler now than it was before the base allocator started just using the chunk allocator directly. This allows arena_boot[01]() to be combined. Add error detection for pthread_atfork() and atexit() function calls.
2010-01-30 06:30:41 +08:00
arena_boot(void)
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
{
Fix bootstrapping crash. If a custom small_size2bin table was required due to non-default size class settings, memory allocation prior to initializing chunk parameters would cause a crash due to division by 0. The fix re-orders the various *_boot() function calls. Bootstrapping is simpler now than it was before the base allocator started just using the chunk allocator directly. This allows arena_boot[01]() to be combined. Add error detection for pthread_atfork() and atexit() function calls.
2010-01-30 06:30:41 +08:00
size_t header_size;
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
unsigned i;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
/* Set variables according to the value of opt_lg_[qc]space_max. */
qspace_max = (1U << opt_lg_qspace_max);
cspace_min = CACHELINE_CEILING(qspace_max);
if (cspace_min == qspace_max)
cspace_min += CACHELINE;
cspace_max = (1U << opt_lg_cspace_max);
sspace_min = SUBPAGE_CEILING(cspace_max);
if (sspace_min == cspace_max)
sspace_min += SUBPAGE;
assert(sspace_min < PAGE_SIZE);
sspace_max = PAGE_SIZE - SUBPAGE;
#ifdef JEMALLOC_TINY
assert(LG_QUANTUM >= LG_TINY_MIN);
#endif
assert(ntbins <= LG_QUANTUM);
nqbins = qspace_max >> LG_QUANTUM;
ncbins = ((cspace_max - cspace_min) >> LG_CACHELINE) + 1;
nsbins = ((sspace_max - sspace_min) >> LG_SUBPAGE) + 1;
Remove medium size classes. Remove medium size classes, because concurrent dirty page purging is no longer capable of purging inactive dirty pages inside active runs (due to recent arena/bin locking changes). Enhance tcache to support caching large objects, so that the same range of size classes is still cached, despite the removal of medium size class support.
2010-03-18 07:27:39 +08:00
nbins = ntbins + nqbins + ncbins + nsbins;
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
/*
* The small_size2bin lookup table uses uint8_t to encode each bin
* index, so we cannot support more than 256 small size classes. This
* limit is difficult to exceed (not even possible with 16B quantum and
* 4KiB pages), and such configurations are impractical, but
* nonetheless we need to protect against this case in order to avoid
* undefined behavior.
Reduce statistical heap sampling memory overhead. If the mean heap sampling interval is larger than one page, simulate sampled small objects with large objects. This allows profiling context pointers to be omitted for small objects. As a result, the memory overhead for sampling decreases as the sampling interval is increased. Fix a compilation error in the profiling code.
2010-04-01 07:45:04 +08:00
*
* Further constrain nbins to 255 if prof_promote is true, since all
* small size classes, plus a "not small" size class must be stored in
* 8 bits of arena_chunk_map_t's bits field.
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
*/
Reduce statistical heap sampling memory overhead. If the mean heap sampling interval is larger than one page, simulate sampled small objects with large objects. This allows profiling context pointers to be omitted for small objects. As a result, the memory overhead for sampling decreases as the sampling interval is increased. Fix a compilation error in the profiling code.
2010-04-01 07:45:04 +08:00
#ifdef JEMALLOC_PROF
if (opt_prof && prof_promote) {
if (nbins > 255) {
char line_buf[UMAX2S_BUFSIZE];
malloc_write("<jemalloc>: Too many small size classes (");
Replace JEMALLOC_OPTIONS with MALLOC_CONF. Replace the single-character run-time flags with key/value pairs, which can be set via the malloc_conf global, /etc/malloc.conf, and the MALLOC_CONF environment variable. Replace the JEMALLOC_PROF_PREFIX environment variable with the "opt.prof_prefix" option. Replace umax2s() with u2s().
2010-10-24 09:37:06 +08:00
malloc_write(u2s(nbins, 10, line_buf));
Reduce statistical heap sampling memory overhead. If the mean heap sampling interval is larger than one page, simulate sampled small objects with large objects. This allows profiling context pointers to be omitted for small objects. As a result, the memory overhead for sampling decreases as the sampling interval is increased. Fix a compilation error in the profiling code.
2010-04-01 07:45:04 +08:00
malloc_write(" > max 255)\n");
abort();
}
} else
#endif
Remove medium size classes. Remove medium size classes, because concurrent dirty page purging is no longer capable of purging inactive dirty pages inside active runs (due to recent arena/bin locking changes). Enhance tcache to support caching large objects, so that the same range of size classes is still cached, despite the removal of medium size class support.
2010-03-18 07:27:39 +08:00
if (nbins > 256) {
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
char line_buf[UMAX2S_BUFSIZE];
Simplify malloc_message(). Rather than passing four strings to malloc_message(), malloc_write4(), and all the functions that use them, only pass one string.
2010-03-04 09:45:38 +08:00
malloc_write("<jemalloc>: Too many small size classes (");
Replace JEMALLOC_OPTIONS with MALLOC_CONF. Replace the single-character run-time flags with key/value pairs, which can be set via the malloc_conf global, /etc/malloc.conf, and the MALLOC_CONF environment variable. Replace the JEMALLOC_PROF_PREFIX environment variable with the "opt.prof_prefix" option. Replace umax2s() with u2s().
2010-10-24 09:37:06 +08:00
malloc_write(u2s(nbins, 10, line_buf));
Simplify malloc_message(). Rather than passing four strings to malloc_message(), malloc_write4(), and all the functions that use them, only pass one string.
2010-03-04 09:45:38 +08:00
malloc_write(" > max 256)\n");
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
abort();
}
/*
* Compute the header size such that it is large enough to contain the
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
* page map. The page map is biased to omit entries for the header
* itself, so some iteration is necessary to compute the map bias.
*
* 1) Compute safe header_size and map_bias values that include enough
* space for an unbiased page map.
* 2) Refine map_bias based on (1) to omit the header pages in the page
* map. The resulting map_bias may be one too small.
* 3) Refine map_bias based on (2). The result will be >= the result
* from (2), and will always be correct.
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
*/
Omit chunk header in arena chunk map. Omit the first map_bias elements of the map in arena_chunk_t. This avoids barely spilling over into an extra chunk header page for common chunk sizes.
2010-10-02 08:35:43 +08:00
map_bias = 0;
for (i = 0; i < 3; i++) {
header_size = offsetof(arena_chunk_t, map)
+ (sizeof(arena_chunk_map_t) * (chunk_npages-map_bias));
map_bias = (header_size >> PAGE_SHIFT) + ((header_size &
PAGE_MASK) != 0);
}
assert(map_bias > 0);
arena_maxclass = chunksize - (map_bias << PAGE_SHIFT);
Fix bootstrapping crash. If a custom small_size2bin table was required due to non-default size class settings, memory allocation prior to initializing chunk parameters would cause a crash due to division by 0. The fix re-orders the various *_boot() function calls. Bootstrapping is simpler now than it was before the base allocator started just using the chunk allocator directly. This allows arena_boot[01]() to be combined. Add error detection for pthread_atfork() and atexit() function calls.
2010-01-30 06:30:41 +08:00
Create arena_bin_info_t. Move read-only fields from arena_bin_t into arena_bin_info_t, primarily in order to avoid false cacheline sharing.
2011-03-16 04:59:15 +08:00
if (small_size2bin_init())
return (true);
if (bin_info_init())
return (true);
Fix bootstrapping crash. If a custom small_size2bin table was required due to non-default size class settings, memory allocation prior to initializing chunk parameters would cause a crash due to division by 0. The fix re-orders the various *_boot() function calls. Bootstrapping is simpler now than it was before the base allocator started just using the chunk allocator directly. This allows arena_boot[01]() to be combined. Add error detection for pthread_atfork() and atexit() function calls.
2010-01-30 06:30:41 +08:00
return (false);
Refactor jemalloc.c into multiple source files. Fix a stats bug in large object curruns accounting. Replace tcache_bin_fill() with arena_tcache_fill(), and fix a bug in an OOM error path. Fix API name mangling to coexist with __attribute__((malloc)).
2010-01-17 01:53:50 +08:00
}
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