project-base/server-skynet-source-3rd-jemalloc
2
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
fd4fcefa00
server-skynet-source-3rd-je.../src/tcache.c

437 lines
12 KiB
C
Raw Normal View History

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_TCACHE_C_
Restructure source tree.
2010-02-12 06:45:59 +08:00
#include "jemalloc/internal/jemalloc_internal.h"
Streamline tcache-related malloc/free fast paths. tcache_get() is inlined, so do the config_tcache check inside tcache_get() and simplify its callers. Make arena_malloc() an inline function, since it is part of the malloc() fast path. Remove conditional logic that cause build issues if --disable-tcache was specified.
2012-02-14 04:29:49 +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
/******************************************************************************/
/* Data. */
Implement tsd. Implement tsd, which is a TLS/TSD abstraction that uses one or both internally. Modify bootstrapping such that no tsd's are utilized until allocation is safe. Remove malloc_[v]tprintf(), and use malloc_snprintf() instead. Fix %p argument size handling in malloc_vsnprintf(). Fix a long-standing statistics-related bug in the "thread.arena" mallctl that could cause crashes due to linked list corruption.
2012-03-22 09:33:03 +08:00
malloc_tsd_data(, tcache, tcache_t *, NULL)
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
bool opt_tcache = true;
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
ssize_t opt_lg_tcache_max = LG_TCACHE_MAXCLASS_DEFAULT;
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
tcache_bin_info_t *tcache_bin_info;
static unsigned stack_nelms; /* Total stack elms per tcache. */
Implement tsd. Implement tsd, which is a TLS/TSD abstraction that uses one or both internally. Modify bootstrapping such that no tsd's are utilized until allocation is safe. Remove malloc_[v]tprintf(), and use malloc_snprintf() instead. Fix %p argument size handling in malloc_vsnprintf(). Fix a long-standing statistics-related bug in the "thread.arena" mallctl that could cause crashes due to linked list corruption.
2012-03-22 09:33:03 +08:00
size_t nhbins;
size_t tcache_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
/******************************************************************************/
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
tcache_alloc_small_hard(tcache_t *tcache, tcache_bin_t *tbin, size_t 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
{
void *ret;
Reduce cpp conditional logic complexity. Convert configuration-related cpp conditional logic to use static constant variables, e.g.: #ifdef JEMALLOC_DEBUG [...] #endif becomes: if (config_debug) { [...] } The advantage is clearer, more concise code. The main disadvantage is that data structures no longer have conditionally defined fields, so they pay the cost of all fields regardless of whether they are used. In practice, this is only a minor concern; config_stats will go away in an upcoming change, and config_prof is the only other major feature that depends on more than a few special-purpose fields.
2012-02-11 12:22:09 +08:00
arena_tcache_fill_small(tcache->arena, tbin, binind,
config_prof ? tcache->prof_accumbytes : 0);
if (config_prof)
tcache->prof_accumbytes = 0;
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
ret = tcache_alloc_easy(tbin);
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 (ret);
}
void
Reduce cpp conditional logic complexity. Convert configuration-related cpp conditional logic to use static constant variables, e.g.: #ifdef JEMALLOC_DEBUG [...] #endif becomes: if (config_debug) { [...] } The advantage is clearer, more concise code. The main disadvantage is that data structures no longer have conditionally defined fields, so they pay the cost of all fields regardless of whether they are used. In practice, this is only a minor concern; config_stats will go away in an upcoming change, and config_prof is the only other major feature that depends on more than a few special-purpose fields.
2012-02-11 12:22:09 +08:00
tcache_bin_flush_small(tcache_bin_t *tbin, size_t binind, unsigned rem,
tcache_t *tcache)
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
void *ptr;
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
unsigned i, nflush, ndeferred;
Fix a thread cache stats merging bug. When a thread cache flushes objects to their arenas due to an abundance of cached objects, it merges the allocation request count for the associated size class, and increments a flush counter. If none of the flushed objects came from the thread's assigned arena, then the merging wouldn't happen (though the counter would typically eventually be merged), nor would the flush counter be incremented (a hard bug). Fix this via extra conditional code just after the flush loop.
2011-03-15 03:56:51 +08:00
bool merged_stats = 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
Simplify small size class infrastructure. Program-generate small size class tables for all valid combinations of LG_TINY_MIN, LG_QUANTUM, and PAGE_SHIFT. Use the appropriate table to generate all relevant data structures, and remove the distinction between tiny/quantum/cacheline/subpage bins. Remove --enable-dynamic-page-shift. This option didn't prove useful in practice, and it prevented optimizations. Add Tilera architecture support.
2012-02-29 08:50:47 +08:00
assert(binind < NBINS);
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
assert(rem <= tbin->ncached);
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
for (nflush = tbin->ncached - rem; nflush > 0; nflush = ndeferred) {
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
/* Lock the arena bin associated with the first object. */
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
arena_chunk_t *chunk = (arena_chunk_t *)CHUNK_ADDR2BASE(
tbin->avail[0]);
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
arena_t *arena = chunk->arena;
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
arena_bin_t *bin = &arena->bins[binind];
Reduce cpp conditional logic complexity. Convert configuration-related cpp conditional logic to use static constant variables, e.g.: #ifdef JEMALLOC_DEBUG [...] #endif becomes: if (config_debug) { [...] } The advantage is clearer, more concise code. The main disadvantage is that data structures no longer have conditionally defined fields, so they pay the cost of all fields regardless of whether they are used. In practice, this is only a minor concern; config_stats will go away in an upcoming change, and config_prof is the only other major feature that depends on more than a few special-purpose fields.
2012-02-11 12:22:09 +08:00
if (config_prof && arena == tcache->arena) {
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, tcache->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
tcache->prof_accumbytes = 0;
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_lock(&bin->lock);
Reduce cpp conditional logic complexity. Convert configuration-related cpp conditional logic to use static constant variables, e.g.: #ifdef JEMALLOC_DEBUG [...] #endif becomes: if (config_debug) { [...] } The advantage is clearer, more concise code. The main disadvantage is that data structures no longer have conditionally defined fields, so they pay the cost of all fields regardless of whether they are used. In practice, this is only a minor concern; config_stats will go away in an upcoming change, and config_prof is the only other major feature that depends on more than a few special-purpose fields.
2012-02-11 12:22:09 +08:00
if (config_stats && arena == tcache->arena) {
Fix a thread cache stats merging bug. When a thread cache flushes objects to their arenas due to an abundance of cached objects, it merges the allocation request count for the associated size class, and increments a flush counter. If none of the flushed objects came from the thread's assigned arena, then the merging wouldn't happen (though the counter would typically eventually be merged), nor would the flush counter be incremented (a hard bug). Fix this via extra conditional code just after the flush loop.
2011-03-15 03:56:51 +08:00
assert(merged_stats == false);
merged_stats = 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
bin->stats.nflushes++;
bin->stats.nrequests += tbin->tstats.nrequests;
tbin->tstats.nrequests = 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
}
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
ndeferred = 0;
for (i = 0; i < nflush; i++) {
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
ptr = tbin->avail[i];
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
assert(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
chunk = (arena_chunk_t *)CHUNK_ADDR2BASE(ptr);
if (chunk->arena == arena) {
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)ptr -
(uintptr_t)chunk) >> 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_chunk_map_t *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
&chunk->map[pageind-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
arena_dalloc_bin(arena, chunk, ptr, mapelm);
} else {
/*
* This object was allocated via a different
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
* arena bin than the one that is currently
* locked. Stash the object, so that it can be
* handled in a future pass.
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
tbin->avail[ndeferred] = 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
ndeferred++;
}
}
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
}
Reduce cpp conditional logic complexity. Convert configuration-related cpp conditional logic to use static constant variables, e.g.: #ifdef JEMALLOC_DEBUG [...] #endif becomes: if (config_debug) { [...] } The advantage is clearer, more concise code. The main disadvantage is that data structures no longer have conditionally defined fields, so they pay the cost of all fields regardless of whether they are used. In practice, this is only a minor concern; config_stats will go away in an upcoming change, and config_prof is the only other major feature that depends on more than a few special-purpose fields.
2012-02-11 12:22:09 +08:00
if (config_stats && merged_stats == false) {
Fix a thread cache stats merging bug. When a thread cache flushes objects to their arenas due to an abundance of cached objects, it merges the allocation request count for the associated size class, and increments a flush counter. If none of the flushed objects came from the thread's assigned arena, then the merging wouldn't happen (though the counter would typically eventually be merged), nor would the flush counter be incremented (a hard bug). Fix this via extra conditional code just after the flush loop.
2011-03-15 03:56:51 +08:00
/*
* The flush loop didn't happen to flush to this thread's
* arena, so the stats didn't get merged. Manually do so now.
*/
arena_bin_t *bin = &tcache->arena->bins[binind];
malloc_mutex_lock(&bin->lock);
bin->stats.nflushes++;
bin->stats.nrequests += tbin->tstats.nrequests;
tbin->tstats.nrequests = 0;
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
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
memmove(tbin->avail, &tbin->avail[tbin->ncached - rem],
rem * sizeof(void *));
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
tbin->ncached = rem;
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
if ((int)tbin->ncached < tbin->low_water)
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
tbin->low_water = tbin->ncached;
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 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
void
Reduce cpp conditional logic complexity. Convert configuration-related cpp conditional logic to use static constant variables, e.g.: #ifdef JEMALLOC_DEBUG [...] #endif becomes: if (config_debug) { [...] } The advantage is clearer, more concise code. The main disadvantage is that data structures no longer have conditionally defined fields, so they pay the cost of all fields regardless of whether they are used. In practice, this is only a minor concern; config_stats will go away in an upcoming change, and config_prof is the only other major feature that depends on more than a few special-purpose fields.
2012-02-11 12:22:09 +08:00
tcache_bin_flush_large(tcache_bin_t *tbin, size_t binind, unsigned rem,
tcache_t *tcache)
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
{
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
void *ptr;
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
unsigned i, nflush, ndeferred;
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
bool merged_stats = false;
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 < nhbins);
assert(rem <= tbin->ncached);
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
for (nflush = tbin->ncached - rem; nflush > 0; nflush = ndeferred) {
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
/* Lock the arena associated with the first object. */
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
arena_chunk_t *chunk = (arena_chunk_t *)CHUNK_ADDR2BASE(
tbin->avail[0]);
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_t *arena = chunk->arena;
malloc_mutex_lock(&arena->lock);
Reduce cpp conditional logic complexity. Convert configuration-related cpp conditional logic to use static constant variables, e.g.: #ifdef JEMALLOC_DEBUG [...] #endif becomes: if (config_debug) { [...] } The advantage is clearer, more concise code. The main disadvantage is that data structures no longer have conditionally defined fields, so they pay the cost of all fields regardless of whether they are used. In practice, this is only a minor concern; config_stats will go away in an upcoming change, and config_prof is the only other major feature that depends on more than a few special-purpose fields.
2012-02-11 12:22:09 +08:00
if ((config_prof || config_stats) && arena == tcache->arena) {
if (config_prof) {
arena_prof_accum(arena,
tcache->prof_accumbytes);
tcache->prof_accumbytes = 0;
}
if (config_stats) {
merged_stats = true;
arena->stats.nrequests_large +=
tbin->tstats.nrequests;
Simplify small size class infrastructure. Program-generate small size class tables for all valid combinations of LG_TINY_MIN, LG_QUANTUM, and PAGE_SHIFT. Use the appropriate table to generate all relevant data structures, and remove the distinction between tiny/quantum/cacheline/subpage bins. Remove --enable-dynamic-page-shift. This option didn't prove useful in practice, and it prevented optimizations. Add Tilera architecture support.
2012-02-29 08:50:47 +08:00
arena->stats.lstats[binind - NBINS].nrequests +=
Reduce cpp conditional logic complexity. Convert configuration-related cpp conditional logic to use static constant variables, e.g.: #ifdef JEMALLOC_DEBUG [...] #endif becomes: if (config_debug) { [...] } The advantage is clearer, more concise code. The main disadvantage is that data structures no longer have conditionally defined fields, so they pay the cost of all fields regardless of whether they are used. In practice, this is only a minor concern; config_stats will go away in an upcoming change, and config_prof is the only other major feature that depends on more than a few special-purpose fields.
2012-02-11 12:22:09 +08:00
tbin->tstats.nrequests;
tbin->tstats.nrequests = 0;
}
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
}
ndeferred = 0;
for (i = 0; i < nflush; i++) {
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
ptr = tbin->avail[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
assert(ptr != NULL);
chunk = (arena_chunk_t *)CHUNK_ADDR2BASE(ptr);
if (chunk->arena == arena)
arena_dalloc_large(arena, chunk, ptr);
else {
/*
* This object was allocated via a different
* arena than the one that is currently locked.
* Stash the object, so that it can be handled
* in a future pass.
*/
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
tbin->avail[ndeferred] = ptr;
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
ndeferred++;
}
}
malloc_mutex_unlock(&arena->lock);
}
Reduce cpp conditional logic complexity. Convert configuration-related cpp conditional logic to use static constant variables, e.g.: #ifdef JEMALLOC_DEBUG [...] #endif becomes: if (config_debug) { [...] } The advantage is clearer, more concise code. The main disadvantage is that data structures no longer have conditionally defined fields, so they pay the cost of all fields regardless of whether they are used. In practice, this is only a minor concern; config_stats will go away in an upcoming change, and config_prof is the only other major feature that depends on more than a few special-purpose fields.
2012-02-11 12:22:09 +08:00
if (config_stats && merged_stats == false) {
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
/*
* The flush loop didn't happen to flush to this thread's
* arena, so the stats didn't get merged. Manually do so now.
*/
arena_t *arena = tcache->arena;
malloc_mutex_lock(&arena->lock);
arena->stats.nrequests_large += tbin->tstats.nrequests;
Simplify small size class infrastructure. Program-generate small size class tables for all valid combinations of LG_TINY_MIN, LG_QUANTUM, and PAGE_SHIFT. Use the appropriate table to generate all relevant data structures, and remove the distinction between tiny/quantum/cacheline/subpage bins. Remove --enable-dynamic-page-shift. This option didn't prove useful in practice, and it prevented optimizations. Add Tilera architecture support.
2012-02-29 08:50:47 +08:00
arena->stats.lstats[binind - NBINS].nrequests +=
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
tbin->tstats.nrequests;
tbin->tstats.nrequests = 0;
malloc_mutex_unlock(&arena->lock);
}
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
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
memmove(tbin->avail, &tbin->avail[tbin->ncached - rem],
rem * sizeof(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
tbin->ncached = rem;
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
if ((int)tbin->ncached < tbin->low_water)
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
tbin->low_water = tbin->ncached;
}
Implement tsd. Implement tsd, which is a TLS/TSD abstraction that uses one or both internally. Modify bootstrapping such that no tsd's are utilized until allocation is safe. Remove malloc_[v]tprintf(), and use malloc_snprintf() instead. Fix %p argument size handling in malloc_vsnprintf(). Fix a long-standing statistics-related bug in the "thread.arena" mallctl that could cause crashes due to linked list corruption.
2012-03-22 09:33:03 +08:00
void
tcache_arena_associate(tcache_t *tcache, arena_t *arena)
{
if (config_stats) {
/* Link into list of extant tcaches. */
malloc_mutex_lock(&arena->lock);
ql_elm_new(tcache, link);
ql_tail_insert(&arena->tcache_ql, tcache, link);
malloc_mutex_unlock(&arena->lock);
}
tcache->arena = arena;
}
void
tcache_arena_dissociate(tcache_t *tcache)
{
if (config_stats) {
/* Unlink from list of extant tcaches. */
malloc_mutex_lock(&tcache->arena->lock);
ql_remove(&tcache->arena->tcache_ql, tcache, link);
malloc_mutex_unlock(&tcache->arena->lock);
tcache_stats_merge(tcache, tcache->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
tcache_t *
tcache_create(arena_t *arena)
{
tcache_t *tcache;
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
size_t size, stack_offset;
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
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
Use offsetof() when sizing dynamic structures. Base dynamic structure size on offsetof(), rather than subtracting the size of the dynamic structure member. Results could differ on systems with strict data structure alignment requirements.
2010-10-02 09:02:43 +08:00
size = offsetof(tcache_t, tbins) + (sizeof(tcache_bin_t) * nhbins);
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
/* Naturally align the pointer stacks. */
size = PTR_CEILING(size);
stack_offset = size;
size += stack_nelms * sizeof(void *);
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
/*
* Round up to the nearest multiple of the cacheline size, in order to
* avoid the possibility of false cacheline sharing.
*
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
* That this works relies on the same logic as in ipalloc(), but we
* cannot directly call ipalloc() here due to tcache bootstrapping
* issues.
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
*/
size = (size + CACHELINE_MASK) & (-CACHELINE);
Simplify small size class infrastructure. Program-generate small size class tables for all valid combinations of LG_TINY_MIN, LG_QUANTUM, and PAGE_SHIFT. Use the appropriate table to generate all relevant data structures, and remove the distinction between tiny/quantum/cacheline/subpage bins. Remove --enable-dynamic-page-shift. This option didn't prove useful in practice, and it prevented optimizations. Add Tilera architecture support.
2012-02-29 08:50:47 +08:00
if (size <= SMALL_MAXCLASS)
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
tcache = (tcache_t *)arena_malloc_small(arena, size, true);
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
else if (size <= tcache_maxclass)
tcache = (tcache_t *)arena_malloc_large(arena, size, true);
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
tcache = (tcache_t *)icalloc(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
if (tcache == NULL)
return (NULL);
Implement tsd. Implement tsd, which is a TLS/TSD abstraction that uses one or both internally. Modify bootstrapping such that no tsd's are utilized until allocation is safe. Remove malloc_[v]tprintf(), and use malloc_snprintf() instead. Fix %p argument size handling in malloc_vsnprintf(). Fix a long-standing statistics-related bug in the "thread.arena" mallctl that could cause crashes due to linked list corruption.
2012-03-22 09:33:03 +08:00
tcache_arena_associate(tcache, 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
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((TCACHE_NSLOTS_SMALL_MAX & 1U) == 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
for (i = 0; i < nhbins; i++) {
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
tcache->tbins[i].lg_fill_div = 1;
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
tcache->tbins[i].avail = (void **)((uintptr_t)tcache +
(uintptr_t)stack_offset);
stack_offset += tcache_bin_info[i].ncached_max * sizeof(void *);
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
}
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
Implement tsd. Implement tsd, which is a TLS/TSD abstraction that uses one or both internally. Modify bootstrapping such that no tsd's are utilized until allocation is safe. Remove malloc_[v]tprintf(), and use malloc_snprintf() instead. Fix %p argument size handling in malloc_vsnprintf(). Fix a long-standing statistics-related bug in the "thread.arena" mallctl that could cause crashes due to linked list corruption.
2012-03-22 09:33:03 +08:00
tcache_tsd_set(&tcache);
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 (tcache);
}
void
tcache_destroy(tcache_t *tcache)
{
unsigned i;
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
size_t tcache_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
Implement tsd. Implement tsd, which is a TLS/TSD abstraction that uses one or both internally. Modify bootstrapping such that no tsd's are utilized until allocation is safe. Remove malloc_[v]tprintf(), and use malloc_snprintf() instead. Fix %p argument size handling in malloc_vsnprintf(). Fix a long-standing statistics-related bug in the "thread.arena" mallctl that could cause crashes due to linked list corruption.
2012-03-22 09:33:03 +08:00
tcache_arena_dissociate(tcache);
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 size class infrastructure. Program-generate small size class tables for all valid combinations of LG_TINY_MIN, LG_QUANTUM, and PAGE_SHIFT. Use the appropriate table to generate all relevant data structures, and remove the distinction between tiny/quantum/cacheline/subpage bins. Remove --enable-dynamic-page-shift. This option didn't prove useful in practice, and it prevented optimizations. Add Tilera architecture support.
2012-02-29 08:50:47 +08:00
for (i = 0; i < NBINS; i++) {
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
tcache_bin_t *tbin = &tcache->tbins[i];
Reduce cpp conditional logic complexity. Convert configuration-related cpp conditional logic to use static constant variables, e.g.: #ifdef JEMALLOC_DEBUG [...] #endif becomes: if (config_debug) { [...] } The advantage is clearer, more concise code. The main disadvantage is that data structures no longer have conditionally defined fields, so they pay the cost of all fields regardless of whether they are used. In practice, this is only a minor concern; config_stats will go away in an upcoming change, and config_prof is the only other major feature that depends on more than a few special-purpose fields.
2012-02-11 12:22:09 +08:00
tcache_bin_flush_small(tbin, i, 0, tcache);
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
Reduce cpp conditional logic complexity. Convert configuration-related cpp conditional logic to use static constant variables, e.g.: #ifdef JEMALLOC_DEBUG [...] #endif becomes: if (config_debug) { [...] } The advantage is clearer, more concise code. The main disadvantage is that data structures no longer have conditionally defined fields, so they pay the cost of all fields regardless of whether they are used. In practice, this is only a minor concern; config_stats will go away in an upcoming change, and config_prof is the only other major feature that depends on more than a few special-purpose fields.
2012-02-11 12:22:09 +08:00
if (config_stats && tbin->tstats.nrequests != 0) {
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
arena_t *arena = tcache->arena;
arena_bin_t *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
malloc_mutex_lock(&bin->lock);
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
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
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
}
}
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 < nhbins; i++) {
tcache_bin_t *tbin = &tcache->tbins[i];
Reduce cpp conditional logic complexity. Convert configuration-related cpp conditional logic to use static constant variables, e.g.: #ifdef JEMALLOC_DEBUG [...] #endif becomes: if (config_debug) { [...] } The advantage is clearer, more concise code. The main disadvantage is that data structures no longer have conditionally defined fields, so they pay the cost of all fields regardless of whether they are used. In practice, this is only a minor concern; config_stats will go away in an upcoming change, and config_prof is the only other major feature that depends on more than a few special-purpose fields.
2012-02-11 12:22:09 +08:00
tcache_bin_flush_large(tbin, i, 0, tcache);
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
Reduce cpp conditional logic complexity. Convert configuration-related cpp conditional logic to use static constant variables, e.g.: #ifdef JEMALLOC_DEBUG [...] #endif becomes: if (config_debug) { [...] } The advantage is clearer, more concise code. The main disadvantage is that data structures no longer have conditionally defined fields, so they pay the cost of all fields regardless of whether they are used. In practice, this is only a minor concern; config_stats will go away in an upcoming change, and config_prof is the only other major feature that depends on more than a few special-purpose fields.
2012-02-11 12:22:09 +08:00
if (config_stats && tbin->tstats.nrequests != 0) {
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_t *arena = tcache->arena;
malloc_mutex_lock(&arena->lock);
arena->stats.nrequests_large += tbin->tstats.nrequests;
Simplify small size class infrastructure. Program-generate small size class tables for all valid combinations of LG_TINY_MIN, LG_QUANTUM, and PAGE_SHIFT. Use the appropriate table to generate all relevant data structures, and remove the distinction between tiny/quantum/cacheline/subpage bins. Remove --enable-dynamic-page-shift. This option didn't prove useful in practice, and it prevented optimizations. Add Tilera architecture support.
2012-02-29 08:50:47 +08:00
arena->stats.lstats[i - NBINS].nrequests +=
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
tbin->tstats.nrequests;
malloc_mutex_unlock(&arena->lock);
}
}
Reduce cpp conditional logic complexity. Convert configuration-related cpp conditional logic to use static constant variables, e.g.: #ifdef JEMALLOC_DEBUG [...] #endif becomes: if (config_debug) { [...] } The advantage is clearer, more concise code. The main disadvantage is that data structures no longer have conditionally defined fields, so they pay the cost of all fields regardless of whether they are used. In practice, this is only a minor concern; config_stats will go away in an upcoming change, and config_prof is the only other major feature that depends on more than a few special-purpose fields.
2012-02-11 12:22:09 +08:00
if (config_prof && tcache->prof_accumbytes > 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
malloc_mutex_lock(&tcache->arena->lock);
arena_prof_accum(tcache->arena, tcache->prof_accumbytes);
malloc_mutex_unlock(&tcache->arena->lock);
}
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
tcache_size = arena_salloc(tcache);
Simplify small size class infrastructure. Program-generate small size class tables for all valid combinations of LG_TINY_MIN, LG_QUANTUM, and PAGE_SHIFT. Use the appropriate table to generate all relevant data structures, and remove the distinction between tiny/quantum/cacheline/subpage bins. Remove --enable-dynamic-page-shift. This option didn't prove useful in practice, and it prevented optimizations. Add Tilera architecture support.
2012-02-29 08:50:47 +08:00
if (tcache_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
arena_chunk_t *chunk = CHUNK_ADDR2BASE(tcache);
arena_t *arena = chunk->arena;
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)tcache - (uintptr_t)chunk) >>
PAGE_SHIFT;
arena_chunk_map_t *mapelm = &chunk->map[pageind-map_bias];
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
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 - (mapelm->bits >> PAGE_SHIFT)) <<
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
arena_bin_t *bin = 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
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
arena_dalloc_bin(arena, chunk, tcache, mapelm);
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);
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
} else if (tcache_size <= tcache_maxclass) {
arena_chunk_t *chunk = CHUNK_ADDR2BASE(tcache);
arena_t *arena = chunk->arena;
malloc_mutex_lock(&arena->lock);
arena_dalloc_large(arena, chunk, tcache);
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
} else
idalloc(tcache);
}
Implement tsd. Implement tsd, which is a TLS/TSD abstraction that uses one or both internally. Modify bootstrapping such that no tsd's are utilized until allocation is safe. Remove malloc_[v]tprintf(), and use malloc_snprintf() instead. Fix %p argument size handling in malloc_vsnprintf(). Fix a long-standing statistics-related bug in the "thread.arena" mallctl that could cause crashes due to linked list corruption.
2012-03-22 09:33:03 +08:00
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
tcache_thread_cleanup(void *arg)
{
Implement tsd. Implement tsd, which is a TLS/TSD abstraction that uses one or both internally. Modify bootstrapping such that no tsd's are utilized until allocation is safe. Remove malloc_[v]tprintf(), and use malloc_snprintf() instead. Fix %p argument size handling in malloc_vsnprintf(). Fix a long-standing statistics-related bug in the "thread.arena" mallctl that could cause crashes due to linked list corruption.
2012-03-22 09:33:03 +08:00
tcache_t *tcache = *(tcache_t **)arg;
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
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
if (tcache == (void *)(uintptr_t)1) {
/*
* The previous time this destructor was called, we set the key
* to 1 so that other destructors wouldn't cause re-creation of
* the tcache. This time, do nothing, so that the destructor
* will not be called again.
*/
} else if (tcache == (void *)(uintptr_t)2) {
/*
* Another destructor called an allocator function after this
* destructor was called. Reset tcache to 1 in order to
* receive another callback.
*/
Implement tsd. Implement tsd, which is a TLS/TSD abstraction that uses one or both internally. Modify bootstrapping such that no tsd's are utilized until allocation is safe. Remove malloc_[v]tprintf(), and use malloc_snprintf() instead. Fix %p argument size handling in malloc_vsnprintf(). Fix a long-standing statistics-related bug in the "thread.arena" mallctl that could cause crashes due to linked list corruption.
2012-03-22 09:33:03 +08:00
tcache = (tcache_t *)(uintptr_t)1;
tcache_tsd_set(&tcache);
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
} else if (tcache != 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
assert(tcache != (void *)(uintptr_t)1);
tcache_destroy(tcache);
Implement tsd. Implement tsd, which is a TLS/TSD abstraction that uses one or both internally. Modify bootstrapping such that no tsd's are utilized until allocation is safe. Remove malloc_[v]tprintf(), and use malloc_snprintf() instead. Fix %p argument size handling in malloc_vsnprintf(). Fix a long-standing statistics-related bug in the "thread.arena" mallctl that could cause crashes due to linked list corruption.
2012-03-22 09:33:03 +08:00
tcache = (tcache_t *)(uintptr_t)1;
tcache_tsd_set(&tcache);
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
tcache_stats_merge(tcache_t *tcache, arena_t *arena)
{
unsigned i;
/* Merge and reset tcache stats. */
Simplify small size class infrastructure. Program-generate small size class tables for all valid combinations of LG_TINY_MIN, LG_QUANTUM, and PAGE_SHIFT. Use the appropriate table to generate all relevant data structures, and remove the distinction between tiny/quantum/cacheline/subpage bins. Remove --enable-dynamic-page-shift. This option didn't prove useful in practice, and it prevented optimizations. Add Tilera architecture support.
2012-02-29 08:50:47 +08:00
for (i = 0; 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
arena_bin_t *bin = &arena->bins[i];
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
tcache_bin_t *tbin = &tcache->tbins[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
malloc_mutex_lock(&bin->lock);
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
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
malloc_mutex_unlock(&bin->lock);
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
tbin->tstats.nrequests = 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
}
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 < nhbins; i++) {
Simplify small size class infrastructure. Program-generate small size class tables for all valid combinations of LG_TINY_MIN, LG_QUANTUM, and PAGE_SHIFT. Use the appropriate table to generate all relevant data structures, and remove the distinction between tiny/quantum/cacheline/subpage bins. Remove --enable-dynamic-page-shift. This option didn't prove useful in practice, and it prevented optimizations. Add Tilera architecture support.
2012-02-29 08:50:47 +08:00
malloc_large_stats_t *lstats = &arena->stats.lstats[i - NBINS];
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
tcache_bin_t *tbin = &tcache->tbins[i];
arena->stats.nrequests_large += tbin->tstats.nrequests;
lstats->nrequests += tbin->tstats.nrequests;
tbin->tstats.nrequests = 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
}
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
bool
Implement tsd. Implement tsd, which is a TLS/TSD abstraction that uses one or both internally. Modify bootstrapping such that no tsd's are utilized until allocation is safe. Remove malloc_[v]tprintf(), and use malloc_snprintf() instead. Fix %p argument size handling in malloc_vsnprintf(). Fix a long-standing statistics-related bug in the "thread.arena" mallctl that could cause crashes due to linked list corruption.
2012-03-22 09:33:03 +08:00
tcache_boot0(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
{
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 (opt_tcache) {
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 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
/*
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
* If necessary, clamp opt_lg_tcache_max, now that
Simplify small size class infrastructure. Program-generate small size class tables for all valid combinations of LG_TINY_MIN, LG_QUANTUM, and PAGE_SHIFT. Use the appropriate table to generate all relevant data structures, and remove the distinction between tiny/quantum/cacheline/subpage bins. Remove --enable-dynamic-page-shift. This option didn't prove useful in practice, and it prevented optimizations. Add Tilera architecture support.
2012-02-29 08:50:47 +08:00
* SMALL_MAXCLASS and arena_maxclass are known.
* XXX Can this be done earlier?
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
*/
Implement tsd. Implement tsd, which is a TLS/TSD abstraction that uses one or both internally. Modify bootstrapping such that no tsd's are utilized until allocation is safe. Remove malloc_[v]tprintf(), and use malloc_snprintf() instead. Fix %p argument size handling in malloc_vsnprintf(). Fix a long-standing statistics-related bug in the "thread.arena" mallctl that could cause crashes due to linked list corruption.
2012-03-22 09:33:03 +08:00
if (opt_lg_tcache_max < 0 || (1U << opt_lg_tcache_max) <
SMALL_MAXCLASS)
Simplify small size class infrastructure. Program-generate small size class tables for all valid combinations of LG_TINY_MIN, LG_QUANTUM, and PAGE_SHIFT. Use the appropriate table to generate all relevant data structures, and remove the distinction between tiny/quantum/cacheline/subpage bins. Remove --enable-dynamic-page-shift. This option didn't prove useful in practice, and it prevented optimizations. Add Tilera architecture support.
2012-02-29 08:50:47 +08:00
tcache_maxclass = SMALL_MAXCLASS;
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
else if ((1U << opt_lg_tcache_max) > 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
tcache_maxclass = arena_maxclass;
else
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
tcache_maxclass = (1U << opt_lg_tcache_max);
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
Simplify small size class infrastructure. Program-generate small size class tables for all valid combinations of LG_TINY_MIN, LG_QUANTUM, and PAGE_SHIFT. Use the appropriate table to generate all relevant data structures, and remove the distinction between tiny/quantum/cacheline/subpage bins. Remove --enable-dynamic-page-shift. This option didn't prove useful in practice, and it prevented optimizations. Add Tilera architecture support.
2012-02-29 08:50:47 +08:00
nhbins = NBINS + (tcache_maxclass >> PAGE_SHIFT);
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
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
/* Initialize tcache_bin_info. */
tcache_bin_info = (tcache_bin_info_t *)base_alloc(nhbins *
sizeof(tcache_bin_info_t));
if (tcache_bin_info == NULL)
return (true);
stack_nelms = 0;
Simplify small size class infrastructure. Program-generate small size class tables for all valid combinations of LG_TINY_MIN, LG_QUANTUM, and PAGE_SHIFT. Use the appropriate table to generate all relevant data structures, and remove the distinction between tiny/quantum/cacheline/subpage bins. Remove --enable-dynamic-page-shift. This option didn't prove useful in practice, and it prevented optimizations. Add Tilera architecture support.
2012-02-29 08:50:47 +08:00
for (i = 0; i < NBINS; i++) {
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 ((arena_bin_info[i].nregs << 1) <=
TCACHE_NSLOTS_SMALL_MAX) {
tcache_bin_info[i].ncached_max =
(arena_bin_info[i].nregs << 1);
} else {
tcache_bin_info[i].ncached_max =
TCACHE_NSLOTS_SMALL_MAX;
}
stack_nelms += tcache_bin_info[i].ncached_max;
}
for (; i < nhbins; i++) {
tcache_bin_info[i].ncached_max = TCACHE_NSLOTS_LARGE;
stack_nelms += tcache_bin_info[i].ncached_max;
}
Implement tsd. Implement tsd, which is a TLS/TSD abstraction that uses one or both internally. Modify bootstrapping such that no tsd's are utilized until allocation is safe. Remove malloc_[v]tprintf(), and use malloc_snprintf() instead. Fix %p argument size handling in malloc_vsnprintf(). Fix a long-standing statistics-related bug in the "thread.arena" mallctl that could cause crashes due to linked list corruption.
2012-03-22 09:33:03 +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
Implement tsd. Implement tsd, which is a TLS/TSD abstraction that uses one or both internally. Modify bootstrapping such that no tsd's are utilized until allocation is safe. Remove malloc_[v]tprintf(), and use malloc_snprintf() instead. Fix %p argument size handling in malloc_vsnprintf(). Fix a long-standing statistics-related bug in the "thread.arena" mallctl that could cause crashes due to linked list corruption.
2012-03-22 09:33:03 +08:00
return (false);
}
bool
tcache_boot1(void)
{
if (opt_tcache) {
if (tcache_tsd_boot())
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
}
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
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
}
Reference in New Issue Copy Permalink