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Move centralized chunk management into arenas.

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Migrate all centralized data structures related to huge allocations and
recyclable chunks into arena_t, so that each arena can manage huge
allocations and recyclable virtual memory completely independently of
other arenas.

Add chunk node caching to arenas, in order to avoid contention on the
base allocator.

Use chunks_rtree to look up huge allocations rather than a red-black
tree.  Maintain a per arena unsorted list of huge allocations (which
will be needed to enumerate huge allocations during arena reset).

Remove the --enable-ivsalloc option, make ivsalloc() always available,
and use it for size queries if --enable-debug is enabled.  The only
practical implications to this removal are that 1) ivsalloc() is now
always available during live debugging (and the underlying radix tree is
available during core-based debugging), and 2) size query validation can
no longer be enabled independent of --enable-debug.

Remove the stats.chunks.{current,total,high} mallctls, and replace their
underlying statistics with simpler atomically updated counters used
exclusively for gdump triggering.  These statistics are no longer very
useful because each arena manages chunks independently, and per arena
statistics provide similar information.

Simplify chunk synchronization code, now that base chunk allocation
cannot cause recursive lock acquisition.
This commit is contained in:
Jason Evans 2015-02-11 12:24:27 -08:00
parent f30e261c5b
commit cbf3a6d703
26 changed files with 394 additions and 555 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
INSTALL
View File

@ -92,7 +92,6 @@ any of the following arguments (not a definitive list) to 'configure':
--enable-debug
Enable assertions and validation code. This incurs a substantial
performance hit, but is very useful during application development.
Implies --enable-ivsalloc.
--enable-code-coverage
Enable code coverage support, for use during jemalloc test development.
@ -107,11 +106,6 @@ any of the following arguments (not a definitive list) to 'configure':
there are interactions between the various coverage targets, so it is
usually advisable to run 'make clean' between repeated code coverage runs.
--enable-ivsalloc
Enable validation code, which verifies that pointers reside within
jemalloc-owned chunks before dereferencing them. This incurs a substantial
performance hit.
--disable-stats
Disable statistics gathering functionality. See the "opt.stats_print"
option documentation for usage details.

22
configure.ac
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@ -625,7 +625,7 @@ fi
dnl Do not compile with debugging by default.
AC_ARG_ENABLE([debug],
[AS_HELP_STRING([--enable-debug], [Build debugging code (implies --enable-ivsalloc)])],
[AS_HELP_STRING([--enable-debug], [Build debugging code])],
[if test "x$enable_debug" = "xno" ; then
enable_debug="0"
else
@ -634,27 +634,8 @@ fi
],
[enable_debug="0"]
)
if test "x$enable_debug" = "x1" ; then
AC_DEFINE([JEMALLOC_DEBUG], [ ])
enable_ivsalloc="1"
fi
AC_SUBST([enable_debug])
dnl Do not validate pointers by default.
AC_ARG_ENABLE([ivsalloc],
[AS_HELP_STRING([--enable-ivsalloc], [Validate pointers passed through the public API])],
[if test "x$enable_ivsalloc" = "xno" ; then
enable_ivsalloc="0"
else
enable_ivsalloc="1"
fi
],
[enable_ivsalloc="0"]
)
if test "x$enable_ivsalloc" = "x1" ; then
AC_DEFINE([JEMALLOC_IVSALLOC], [ ])
fi
dnl Only optimize if not debugging.
if test "x$enable_debug" = "x0" -a "x$no_CFLAGS" = "xyes" ; then
dnl Make sure that an optimization flag was not specified in EXTRA_CFLAGS.
@ -1401,7 +1382,6 @@ if test "x${enable_zone_allocator}" = "x1" ; then
if test "x${abi}" != "xmacho"; then
AC_MSG_ERROR([--enable-zone-allocator is only supported on Darwin])
fi
AC_DEFINE([JEMALLOC_IVSALLOC], [ ])
AC_DEFINE([JEMALLOC_ZONE], [ ])
dnl The szone version jumped from 3 to 6 between the OS X 10.5.x and 10.6

35
doc/jemalloc.xml.in
View File

@ -1847,7 +1847,7 @@ malloc_conf = "xmalloc:true";]]></programlisting>
equal to <link
linkend="stats.allocated"><mallctl>stats.allocated</mallctl></link>.
This does not include <link linkend="stats.arenas.i.pdirty">
<mallctl>stats.arenas.&lt;i&gt;.pdirty</mallctl></link> and pages
<mallctl>stats.arenas.&lt;i&gt;.pdirty</mallctl></link>, nor pages
entirely devoted to allocator metadata.</para></listitem>
</varlistentry>
@ -1880,39 +1880,6 @@ malloc_conf = "xmalloc:true";]]></programlisting>
does not include inactive chunks.</para></listitem>
</varlistentry>
<varlistentry id="stats.chunks.current">
<term>
<mallctl>stats.chunks.current</mallctl>
(<type>size_t</type>)
<literal>r-</literal>
[<option>--enable-stats</option>]
</term>
<listitem><para>Total number of chunks actively mapped on behalf of the
application. This does not include inactive chunks.
</para></listitem>
</varlistentry>
<varlistentry id="stats.chunks.total">
<term>
<mallctl>stats.chunks.total</mallctl>
(<type>uint64_t</type>)
<literal>r-</literal>
[<option>--enable-stats</option>]
</term>
<listitem><para>Cumulative number of chunks allocated.</para></listitem>
</varlistentry>
<varlistentry id="stats.chunks.high">
<term>
<mallctl>stats.chunks.high</mallctl>
(<type>size_t</type>)
<literal>r-</literal>
[<option>--enable-stats</option>]
</term>
<listitem><para>Maximum number of active chunks at any time thus far.
</para></listitem>
</varlistentry>
<varlistentry id="stats.arenas.i.dss">
<term>
<mallctl>stats.arenas.&lt;i&gt;.dss</mallctl>

60
include/jemalloc/internal/arena.h
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@ -151,8 +151,12 @@ typedef ql_head(arena_chunk_map_misc_t) arena_chunk_miscelms_t;
/* Arena chunk header. */
struct arena_chunk_s {
/* Arena that owns the chunk. */
arena_t *arena;
/*
* The arena that owns the chunk is node.arena. This field as a whole
* is used by chunks_rtree to support both ivsalloc() and core-based
* debugging.
*/
extent_node_t node;
/*
* Map of pages within chunk that keeps track of free/large/small. The
@ -313,6 +317,27 @@ struct arena_s {
/* List of dirty runs this arena manages. */
arena_chunk_miscelms_t runs_dirty;
/* Extant huge allocations. */
ql_head(extent_node_t) huge;
/* Synchronizes all huge allocation/update/deallocation. */
malloc_mutex_t huge_mtx;
/*
* Trees of chunks that were previously allocated (trees differ only in
* node ordering). These are used when allocating chunks, in an attempt
* to re-use address space. Depending on function, different tree
* orderings are needed, which is why there are two trees with the same
* contents.
*/
extent_tree_t chunks_szad_mmap;
extent_tree_t chunks_ad_mmap;
extent_tree_t chunks_szad_dss;
extent_tree_t chunks_ad_dss;
malloc_mutex_t chunks_mtx;
/* Cache of nodes that were allocated via base_alloc(). */
ql_head(extent_node_t) node_cache;
malloc_mutex_t node_cache_mtx;
/*
* User-configurable chunk allocation and deallocation functions.
*/
@ -338,6 +363,8 @@ extern size_t arena_maxclass; /* Max size class for arenas. */
extern unsigned nlclasses; /* Number of large size classes. */
extern unsigned nhclasses; /* Number of huge size classes. */
extent_node_t *arena_node_alloc(arena_t *arena);
void arena_node_dalloc(arena_t *arena, extent_node_t *node);
void *arena_chunk_alloc_huge(arena_t *arena, size_t usize, size_t alignment,
bool *zero);
void arena_chunk_dalloc_huge(arena_t *arena, void *chunk, size_t usize);
@ -453,8 +480,7 @@ void *arena_malloc(tsd_t *tsd, arena_t *arena, size_t size, bool zero,
tcache_t *tcache);
arena_t *arena_aalloc(const void *ptr);
size_t arena_salloc(const void *ptr, bool demote);
void arena_dalloc(tsd_t *tsd, arena_chunk_t *chunk, void *ptr,
tcache_t *tcache);
void arena_dalloc(tsd_t *tsd, void *ptr, tcache_t *tcache);
void arena_sdalloc(tsd_t *tsd, arena_chunk_t *chunk, void *ptr, size_t size,
tcache_t *tcache);
#endif
@ -792,7 +818,7 @@ arena_ptr_small_binind_get(const void *ptr, size_t mapbits)
assert(binind != BININD_INVALID);
assert(binind < NBINS);
chunk = (arena_chunk_t *)CHUNK_ADDR2BASE(ptr);
arena = chunk->arena;
arena = chunk->node.arena;
pageind = ((uintptr_t)ptr - (uintptr_t)chunk) >> LG_PAGE;
actual_mapbits = arena_mapbits_get(chunk, pageind);
assert(mapbits == actual_mapbits);
@ -980,7 +1006,7 @@ arena_aalloc(const void *ptr)
arena_chunk_t *chunk;
chunk = (arena_chunk_t *)CHUNK_ADDR2BASE(ptr);
return (chunk->arena);
return (chunk->node.arena);
}
/* Return the size of the allocation pointed to by ptr. */
@ -1024,11 +1050,18 @@ arena_salloc(const void *ptr, bool demote)
}
JEMALLOC_ALWAYS_INLINE void
arena_dalloc(tsd_t *tsd, arena_chunk_t *chunk, void *ptr, tcache_t *tcache)
arena_dalloc(tsd_t *tsd, void *ptr, tcache_t *tcache)
{
arena_chunk_t *chunk;
size_t pageind, mapbits;
assert(ptr != NULL);
chunk = (arena_chunk_t *)CHUNK_ADDR2BASE(ptr);
if (unlikely(chunk == ptr)) {
huge_dalloc(tsd, ptr, tcache);
return;
}
assert(CHUNK_ADDR2BASE(ptr) != ptr);
pageind = ((uintptr_t)ptr - (uintptr_t)chunk) >> LG_PAGE;
@ -1040,8 +1073,10 @@ arena_dalloc(tsd_t *tsd, arena_chunk_t *chunk, void *ptr, tcache_t *tcache)
index_t binind = arena_ptr_small_binind_get(ptr,
mapbits);
tcache_dalloc_small(tsd, tcache, ptr, binind);
} else
arena_dalloc_small(chunk->arena, chunk, ptr, pageind);
} else {
arena_dalloc_small(chunk->node.arena, chunk, ptr,
pageind);
}
} else {
size_t size = arena_mapbits_large_size_get(chunk, pageind);
@ -1050,7 +1085,7 @@ arena_dalloc(tsd_t *tsd, arena_chunk_t *chunk, void *ptr, tcache_t *tcache)
if (likely(tcache != NULL) && size <= tcache_maxclass)
tcache_dalloc_large(tsd, tcache, ptr, size);
else
arena_dalloc_large(chunk->arena, chunk, ptr);
arena_dalloc_large(chunk->node.arena, chunk, ptr);
}
}
@ -1081,7 +1116,8 @@ arena_sdalloc(tsd_t *tsd, arena_chunk_t *chunk, void *ptr, size_t size,
} else {
size_t pageind = ((uintptr_t)ptr - (uintptr_t)chunk) >>
LG_PAGE;
arena_dalloc_small(chunk->arena, chunk, ptr, pageind);
arena_dalloc_small(chunk->node.arena, chunk, ptr,
pageind);
}
} else {
assert(((uintptr_t)ptr & PAGE_MASK) == 0);
@ -1089,7 +1125,7 @@ arena_sdalloc(tsd_t *tsd, arena_chunk_t *chunk, void *ptr, size_t size,
if (likely(tcache != NULL) && size <= tcache_maxclass)
tcache_dalloc_large(tsd, tcache, ptr, size);
else
arena_dalloc_large(chunk->arena, chunk, ptr);
arena_dalloc_large(chunk->node.arena, chunk, ptr);
}
}
# endif /* JEMALLOC_ARENA_INLINE_B */

4
include/jemalloc/internal/atomic.h
View File

@ -52,7 +52,7 @@ void atomic_write_uint32(uint32_t *p, uint32_t x);
void *atomic_add_p(void **p, void *x);
void *atomic_sub_p(void **p, void *x);
bool atomic_cas_p(void **p, void *c, void *s);
void atomic_write_p(void **p, void *x);
void atomic_write_p(void **p, const void *x);
size_t atomic_add_z(size_t *p, size_t x);
size_t atomic_sub_z(size_t *p, size_t x);
bool atomic_cas_z(size_t *p, size_t c, size_t s);
@ -538,7 +538,7 @@ atomic_cas_p(void **p, void *c, void *s)
}
JEMALLOC_INLINE void
atomic_write_p(void **p, void *x)
atomic_write_p(void **p, const void *x)
{
#if (LG_SIZEOF_PTR == 3)

2
include/jemalloc/internal/base.h
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@ -10,8 +10,6 @@
#ifdef JEMALLOC_H_EXTERNS
void *base_alloc(size_t size);
extent_node_t *base_node_alloc(void);
void base_node_dalloc(extent_node_t *node);
size_t base_allocated_get(void);
bool base_boot(void);
void base_prefork(void);

22
include/jemalloc/internal/chunk.h
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@ -30,24 +30,21 @@
extern size_t opt_lg_chunk;
extern const char *opt_dss;
/* Protects stats_chunks; currently not used for any other purpose. */
extern malloc_mutex_t chunks_mtx;
/* Chunk statistics. */
extern chunk_stats_t stats_chunks;
extern rtree_t chunks_rtree;
extern size_t chunksize;
extern size_t chunksize_mask; /* (chunksize - 1). */
extern size_t chunk_npages;
bool chunk_register(const void *chunk, const extent_node_t *node);
void chunk_deregister(const void *chunk, const extent_node_t *node);
void *chunk_alloc_base(size_t size);
void *chunk_alloc_arena(chunk_alloc_t *chunk_alloc,
chunk_dalloc_t *chunk_dalloc, unsigned arena_ind, void *new_addr,
size_t size, size_t alignment, bool *zero);
void *chunk_alloc_default(void *new_addr, size_t size, size_t alignment,
bool *zero, unsigned arena_ind);
void chunk_unmap(void *chunk, size_t size);
void chunk_unmap(arena_t *arena, void *chunk, size_t size);
bool chunk_dalloc_default(void *chunk, size_t size, unsigned arena_ind);
bool chunk_boot(void);
void chunk_prefork(void);
@ -58,6 +55,19 @@ void chunk_postfork_child(void);
/******************************************************************************/
#ifdef JEMALLOC_H_INLINES
#ifndef JEMALLOC_ENABLE_INLINE
extent_node_t *chunk_lookup(const void *chunk);
#endif
#if (defined(JEMALLOC_ENABLE_INLINE) || defined(JEMALLOC_CHUNK_C_))
JEMALLOC_INLINE extent_node_t *
chunk_lookup(const void *chunk)
{
return (rtree_get(&chunks_rtree, (uintptr_t)chunk));
}
#endif
#endif /* JEMALLOC_H_INLINES */
/******************************************************************************/

4
include/jemalloc/internal/chunk_dss.h
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@ -23,8 +23,8 @@ extern const char *dss_prec_names[];
dss_prec_t chunk_dss_prec_get(void);
bool chunk_dss_prec_set(dss_prec_t dss_prec);
void *chunk_alloc_dss(void *new_addr, size_t size, size_t alignment,
bool *zero);
void *chunk_alloc_dss(arena_t *arena, void *new_addr, size_t size,
size_t alignment, bool *zero);
bool chunk_in_dss(void *chunk);
bool chunk_dss_boot(void);
void chunk_dss_prefork(void);

5
include/jemalloc/internal/ctl.h
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@ -54,11 +54,6 @@ struct ctl_stats_s {
size_t active;
size_t metadata;
size_t mapped;
struct {
size_t current; /* stats_chunks.curchunks */
uint64_t total; /* stats_chunks.nchunks */
size_t high; /* stats_chunks.highchunks */
} chunks;
unsigned narenas;
ctl_arena_stats_t *arenas; /* (narenas + 1) elements. */
};

25
include/jemalloc/internal/extent.h
View File

@ -9,21 +9,17 @@ typedef struct extent_node_s extent_node_t;
/* Tree of extents. */
struct extent_node_s {
/* Linkage for the size/address-ordered tree. */
rb_node(extent_node_t) link_szad;
/* Linkage for the address-ordered tree. */
rb_node(extent_node_t) link_ad;
/* Arena from which this extent came, if any. */
arena_t *arena;
/* Pointer to the extent that this tree node is responsible for. */
void *addr;
/* Total region size. */
/*
* Total region size, or 0 if this node corresponds to an arena chunk.
*/
size_t size;
/* Arena from which this extent came, if any. */
arena_t *arena;
/*
* 'prof_tctx' and 'zeroed' are never needed at the same time, so
* overlay them in order to fit extent_node_t in one cache line.
@ -35,6 +31,17 @@ struct extent_node_s {
/* True if zero-filled; used by chunk recycling code. */
bool zeroed;
};
union {
/* Linkage for the size/address-ordered tree. */
rb_node(extent_node_t) link_szad;
/* Linkage for huge allocations and cached chunks nodes. */
ql_elm(extent_node_t) link_ql;
};
/* Linkage for the address-ordered tree. */
rb_node(extent_node_t) link_ad;
};
typedef rb_tree(extent_node_t) extent_tree_t;

4
include/jemalloc/internal/huge.h
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@ -27,10 +27,6 @@ arena_t *huge_aalloc(const void *ptr);
size_t huge_salloc(const void *ptr);
prof_tctx_t *huge_prof_tctx_get(const void *ptr);
void huge_prof_tctx_set(const void *ptr, prof_tctx_t *tctx);
bool huge_boot(void);
void huge_prefork(void);
void huge_postfork_parent(void);
void huge_postfork_child(void);
#endif /* JEMALLOC_H_EXTERNS */
/******************************************************************************/

28
include/jemalloc/internal/jemalloc_internal.h.in
View File

@ -119,13 +119,6 @@ static const bool config_xmalloc =
false
#endif
;
static const bool config_ivsalloc =
#ifdef JEMALLOC_IVSALLOC
true
#else
false
#endif
;
#ifdef JEMALLOC_C11ATOMICS
#include <stdatomic.h>
@ -352,9 +345,9 @@ typedef unsigned index_t;
#include "jemalloc/internal/arena.h"
#include "jemalloc/internal/bitmap.h"
#include "jemalloc/internal/base.h"
#include "jemalloc/internal/rtree.h"
#include "jemalloc/internal/chunk.h"
#include "jemalloc/internal/huge.h"
#include "jemalloc/internal/rtree.h"
#include "jemalloc/internal/tcache.h"
#include "jemalloc/internal/hash.h"
#include "jemalloc/internal/quarantine.h"
@ -378,9 +371,9 @@ typedef unsigned index_t;
#include "jemalloc/internal/extent.h"
#include "jemalloc/internal/arena.h"
#include "jemalloc/internal/base.h"
#include "jemalloc/internal/rtree.h"
#include "jemalloc/internal/chunk.h"
#include "jemalloc/internal/huge.h"
#include "jemalloc/internal/rtree.h"
#include "jemalloc/internal/tcache.h"
#include "jemalloc/internal/hash.h"
#include "jemalloc/internal/quarantine.h"
@ -457,9 +450,9 @@ void jemalloc_postfork_child(void);
#include "jemalloc/internal/extent.h"
#include "jemalloc/internal/arena.h"
#include "jemalloc/internal/base.h"
#include "jemalloc/internal/rtree.h"
#include "jemalloc/internal/chunk.h"
#include "jemalloc/internal/huge.h"
#include "jemalloc/internal/rtree.h"
#include "jemalloc/internal/tcache.h"
#include "jemalloc/internal/hash.h"
#include "jemalloc/internal/quarantine.h"
@ -483,6 +476,7 @@ void jemalloc_postfork_child(void);
#include "jemalloc/internal/mb.h"
#include "jemalloc/internal/extent.h"
#include "jemalloc/internal/base.h"
#include "jemalloc/internal/rtree.h"
#include "jemalloc/internal/chunk.h"
#include "jemalloc/internal/huge.h"
@ -777,7 +771,6 @@ arena_get(tsd_t *tsd, unsigned ind, bool init_if_missing,
#endif
#include "jemalloc/internal/bitmap.h"
#include "jemalloc/internal/rtree.h"
/*
* Include portions of arena.h interleaved with tcache.h in order to resolve
* circular dependencies.
@ -966,10 +959,14 @@ ipalloc(tsd_t *tsd, size_t usize, size_t alignment, bool zero)
JEMALLOC_ALWAYS_INLINE size_t
ivsalloc(const void *ptr, bool demote)
{
extent_node_t *node;
/* Return 0 if ptr is not within a chunk managed by jemalloc. */
if (rtree_get(&chunks_rtree, (uintptr_t)CHUNK_ADDR2BASE(ptr)) == 0)
node = chunk_lookup(CHUNK_ADDR2BASE(ptr));
if (node == NULL)
return (0);
/* Only arena chunks should be looked up via interior pointers. */
assert(node->addr == ptr || node->size == 0);
return (isalloc(ptr, demote));
}
@ -999,7 +996,6 @@ p2rz(const void *ptr)
JEMALLOC_ALWAYS_INLINE void
idalloctm(tsd_t *tsd, void *ptr, tcache_t *tcache, bool is_metadata)
{
arena_chunk_t *chunk;
assert(ptr != NULL);
if (config_stats && is_metadata) {
@ -1007,11 +1003,7 @@ idalloctm(tsd_t *tsd, void *ptr, tcache_t *tcache, bool is_metadata)
config_prof));
}
chunk = (arena_chunk_t *)CHUNK_ADDR2BASE(ptr);
if (likely(chunk != ptr))
arena_dalloc(tsd, chunk, ptr, tcache);
else
huge_dalloc(tsd, ptr, tcache);
arena_dalloc(tsd, ptr, tcache);
}
JEMALLOC_ALWAYS_INLINE void

6
include/jemalloc/internal/jemalloc_internal_defs.h.in
View File

@ -186,12 +186,6 @@
#undef JEMALLOC_INTERNAL_FFSL
#undef JEMALLOC_INTERNAL_FFS
/*
* JEMALLOC_IVSALLOC enables ivsalloc(), which verifies that pointers reside
* within jemalloc-owned chunks before dereferencing them.
*/
#undef JEMALLOC_IVSALLOC
/*
* Darwin (OS X) uses zones to work around Mach-O symbol override shortcomings.
*/

12
include/jemalloc/internal/private_symbols.txt
View File

@ -60,6 +60,8 @@ arena_miscelm_to_pageind
arena_miscelm_to_rpages
arena_nbound
arena_new
arena_node_alloc
arena_node_dalloc
arena_palloc
arena_postfork_child
arena_postfork_parent
@ -103,8 +105,6 @@ atomic_sub_z
base_alloc
base_allocated_get
base_boot
base_node_alloc
base_node_dalloc
base_postfork_child
base_postfork_parent
base_prefork
@ -130,6 +130,7 @@ chunk_alloc_mmap
chunk_boot
chunk_dalloc_default
chunk_dalloc_mmap
chunk_deregister
chunk_dss_boot
chunk_dss_postfork_child
chunk_dss_postfork_parent
@ -137,12 +138,13 @@ chunk_dss_prec_get
chunk_dss_prec_set
chunk_dss_prefork
chunk_in_dss
chunk_lookup
chunk_npages
chunk_postfork_child
chunk_postfork_parent
chunk_prefork
chunk_register
chunk_unmap
chunks_mtx
chunks_rtree
chunksize
chunksize_mask
@ -218,16 +220,12 @@ hash_x86_128
hash_x86_32
huge_aalloc
huge_allocated
huge_boot
huge_dalloc
huge_dalloc_junk
huge_malloc
huge_ndalloc
huge_nmalloc
huge_palloc
huge_postfork_child
huge_postfork_parent
huge_prefork
huge_prof_tctx_get
huge_prof_tctx_set
huge_ralloc

23
include/jemalloc/internal/rtree.h
View File

@ -37,7 +37,7 @@ typedef void (rtree_node_dalloc_t)(rtree_node_elm_t *);
struct rtree_node_elm_s {
union {
rtree_node_elm_t *child;
void *val;
extent_node_t *val;
};
};
@ -110,13 +110,14 @@ bool rtree_node_valid(rtree_node_elm_t *node);
rtree_node_elm_t *rtree_child_tryread(rtree_node_elm_t *elm);
rtree_node_elm_t *rtree_child_read(rtree_t *rtree, rtree_node_elm_t *elm,
unsigned level);
void *rtree_val_read(rtree_t *rtree, rtree_node_elm_t *elm);
void rtree_val_write(rtree_t *rtree, rtree_node_elm_t *elm, void *val);
extent_node_t *rtree_val_read(rtree_t *rtree, rtree_node_elm_t *elm);
void rtree_val_write(rtree_t *rtree, rtree_node_elm_t *elm,
const extent_node_t *val);
rtree_node_elm_t *rtree_subtree_tryread(rtree_t *rtree, unsigned level);
rtree_node_elm_t *rtree_subtree_read(rtree_t *rtree, unsigned level);
void *rtree_get(rtree_t *rtree, uintptr_t key);
bool rtree_set(rtree_t *rtree, uintptr_t key, void *val);
extent_node_t *rtree_get(rtree_t *rtree, uintptr_t key);
bool rtree_set(rtree_t *rtree, uintptr_t key, const extent_node_t *val);
#endif
#if (defined(JEMALLOC_ENABLE_INLINE) || defined(JEMALLOC_RTREE_C_))
@ -173,18 +174,18 @@ rtree_child_read(rtree_t *rtree, rtree_node_elm_t *elm, unsigned level)
return (child);
}
JEMALLOC_INLINE void *
JEMALLOC_INLINE extent_node_t *
rtree_val_read(rtree_t *rtree, rtree_node_elm_t *elm)
{
return (atomic_read_p(&elm->val));
return (atomic_read_p((void **)&elm->val));
}
JEMALLOC_INLINE void
rtree_val_write(rtree_t *rtree, rtree_node_elm_t *elm, void *val)
rtree_val_write(rtree_t *rtree, rtree_node_elm_t *elm, const extent_node_t *val)
{
atomic_write_p(&elm->val, val);
atomic_write_p((void **)&elm->val, val);
}
JEMALLOC_INLINE rtree_node_elm_t *
@ -210,7 +211,7 @@ rtree_subtree_read(rtree_t *rtree, unsigned level)
return (subtree);
}
JEMALLOC_INLINE void *
JEMALLOC_INLINE extent_node_t *
rtree_get(rtree_t *rtree, uintptr_t key)
{
uintptr_t subkey;
@ -238,7 +239,7 @@ rtree_get(rtree_t *rtree, uintptr_t key)
}
JEMALLOC_INLINE bool
rtree_set(rtree_t *rtree, uintptr_t key, void *val)
rtree_set(rtree_t *rtree, uintptr_t key, const extent_node_t *val)
{
uintptr_t subkey;
unsigned i, start_level;

15
include/jemalloc/internal/stats.h
View File

@ -135,21 +135,6 @@ struct arena_stats_s {
malloc_huge_stats_t *hstats;
};
struct chunk_stats_s {
/* Number of chunks that were allocated. */
uint64_t nchunks;
/* High-water mark for number of chunks allocated. */
size_t highchunks;
/*
* Current number of chunks allocated. This value isn't maintained for
* any other purpose, so keep track of it in order to be able to set
* highchunks.
*/
size_t curchunks;
};
#endif /* JEMALLOC_H_STRUCTS */
/******************************************************************************/
#ifdef JEMALLOC_H_EXTERNS

74
src/arena.c
View File

@ -20,6 +20,7 @@ unsigned nhclasses; /* Number of huge size classes. */
* definition.
*/
static void arena_chunk_dalloc(arena_t *arena, arena_chunk_t *chunk);
static void arena_purge(arena_t *arena, bool all);
static void arena_run_dalloc(arena_t *arena, arena_run_t *run, bool dirty,
bool cleaned);
@ -392,8 +393,7 @@ arena_chunk_init_spare(arena_t *arena)
}
static arena_chunk_t *
arena_chunk_alloc_internal(arena_t *arena, size_t size, size_t alignment,
bool *zero)
arena_chunk_alloc_internal(arena_t *arena, bool *zero)
{
arena_chunk_t *chunk;
chunk_alloc_t *chunk_alloc;
@ -403,7 +403,16 @@ arena_chunk_alloc_internal(arena_t *arena, size_t size, size_t alignment,
chunk_dalloc = arena->chunk_dalloc;
malloc_mutex_unlock(&arena->lock);
chunk = (arena_chunk_t *)chunk_alloc_arena(chunk_alloc, chunk_dalloc,
arena->ind, NULL, size, alignment, zero);
arena->ind, NULL, chunksize, chunksize, zero);
if (chunk != NULL) {
chunk->node.arena = arena;
chunk->node.addr = chunk;
chunk->node.size = 0; /* Indicates this is an arena chunk. */
if (chunk_register(chunk, &chunk->node)) {
chunk_dalloc((void *)chunk, chunksize, arena->ind);
chunk = NULL;
}
}
malloc_mutex_lock(&arena->lock);
if (config_stats && chunk != NULL) {
arena->stats.mapped += chunksize;
@ -423,12 +432,10 @@ arena_chunk_init_hard(arena_t *arena)
assert(arena->spare == NULL);
zero = false;
chunk = arena_chunk_alloc_internal(arena, chunksize, chunksize, &zero);
chunk = arena_chunk_alloc_internal(arena, &zero);
if (chunk == NULL)
return (NULL);
chunk->arena = arena;
/*
* Initialize the map to contain one maximal free untouched run. Mark
* the pages as zeroed iff chunk_alloc() returned a zeroed chunk.
@ -514,6 +521,7 @@ arena_chunk_dalloc(arena_t *arena, arena_chunk_t *chunk)
}
chunk_dalloc = arena->chunk_dalloc;
malloc_mutex_unlock(&arena->lock);
chunk_deregister(spare, &spare->node);
chunk_dalloc((void *)spare, chunksize, arena->ind);
malloc_mutex_lock(&arena->lock);
if (config_stats) {
@ -593,6 +601,32 @@ arena_huge_ralloc_stats_update_undo(arena_t *arena, size_t oldsize,
arena_huge_malloc_stats_update_undo(arena, usize);
}
extent_node_t *
arena_node_alloc(arena_t *arena)
{
extent_node_t *node;
malloc_mutex_lock(&arena->node_cache_mtx);
node = ql_last(&arena->node_cache, link_ql);
if (node == NULL) {
malloc_mutex_unlock(&arena->node_cache_mtx);
return (base_alloc(sizeof(extent_node_t)));
}
ql_tail_remove(&arena->node_cache, extent_node_t, link_ql);
malloc_mutex_unlock(&arena->node_cache_mtx);
return (node);
}
void
arena_node_dalloc(arena_t *arena, extent_node_t *node)
{
malloc_mutex_lock(&arena->node_cache_mtx);
ql_elm_new(node, link_ql);
ql_tail_insert(&arena->node_cache, node, link_ql);
malloc_mutex_unlock(&arena->node_cache_mtx);
}
void *
arena_chunk_alloc_huge(arena_t *arena, size_t usize, size_t alignment,
bool *zero)
@ -1782,7 +1816,7 @@ arena_dissociate_bin_run(arena_chunk_t *chunk, arena_run_t *run,
if (run == bin->runcur)
bin->runcur = NULL;
else {
index_t binind = arena_bin_index(chunk->arena, bin);
index_t binind = arena_bin_index(chunk->node.arena, bin);
arena_bin_info_t *bin_info = &arena_bin_info[binind];
if (bin_info->nregs != 1) {
@ -2123,7 +2157,7 @@ arena_ralloc_large(void *ptr, size_t oldsize, size_t size, size_t extra,
arena_t *arena;
chunk = (arena_chunk_t *)CHUNK_ADDR2BASE(ptr);
arena = chunk->arena;
arena = chunk->node.arena;
if (usize < oldsize) {
/* Fill before shrinking in order avoid a race. */
@ -2338,10 +2372,21 @@ arena_new(unsigned ind)
arena->ind = ind;
arena->nthreads = 0;
if (malloc_mutex_init(&arena->lock))
return (NULL);
arena->chunk_alloc = chunk_alloc_default;
arena->chunk_dalloc = chunk_dalloc_default;
if (malloc_mutex_init(&arena->lock))
ql_new(&arena->huge);
if (malloc_mutex_init(&arena->huge_mtx))
return (NULL);
extent_tree_szad_new(&arena->chunks_szad_mmap);
extent_tree_ad_new(&arena->chunks_ad_mmap);
extent_tree_szad_new(&arena->chunks_szad_dss);
extent_tree_ad_new(&arena->chunks_ad_dss);
ql_new(&arena->node_cache);
if (malloc_mutex_init(&arena->chunks_mtx))
return (NULL);
if (malloc_mutex_init(&arena->node_cache_mtx))
return (NULL);
if (config_stats) {
@ -2551,6 +2596,9 @@ arena_prefork(arena_t *arena)
unsigned i;
malloc_mutex_prefork(&arena->lock);
malloc_mutex_prefork(&arena->huge_mtx);
malloc_mutex_prefork(&arena->chunks_mtx);
malloc_mutex_prefork(&arena->node_cache_mtx);
for (i = 0; i < NBINS; i++)
malloc_mutex_prefork(&arena->bins[i].lock);
}
@ -2562,6 +2610,9 @@ arena_postfork_parent(arena_t *arena)
for (i = 0; i < NBINS; i++)
malloc_mutex_postfork_parent(&arena->bins[i].lock);
malloc_mutex_postfork_parent(&arena->node_cache_mtx);
malloc_mutex_postfork_parent(&arena->chunks_mtx);
malloc_mutex_postfork_parent(&arena->huge_mtx);
malloc_mutex_postfork_parent(&arena->lock);
}
@ -2572,5 +2623,8 @@ arena_postfork_child(arena_t *arena)
for (i = 0; i < NBINS; i++)
malloc_mutex_postfork_child(&arena->bins[i].lock);
malloc_mutex_postfork_child(&arena->node_cache_mtx);
malloc_mutex_postfork_child(&arena->chunks_mtx);
malloc_mutex_postfork_child(&arena->huge_mtx);
malloc_mutex_postfork_child(&arena->lock);
}

65
src/base.c
View File

@ -11,8 +11,9 @@ static size_t base_allocated;
/******************************************************************************/
/* base_mtx must be held. */
static extent_node_t *
base_node_try_alloc_locked(void)
base_node_try_alloc(void)
{
extent_node_t *node;
@ -24,8 +25,9 @@ base_node_try_alloc_locked(void)
return (node);
}
/* base_mtx must be held. */
static void
base_node_dalloc_locked(extent_node_t *node)
base_node_dalloc(extent_node_t *node)
{
JEMALLOC_VALGRIND_MAKE_MEM_UNDEFINED(node, sizeof(extent_node_t));
@ -42,14 +44,14 @@ base_chunk_alloc(size_t minsize)
void *addr;
assert(minsize != 0);
node = base_node_try_alloc_locked();
node = base_node_try_alloc();
/* Allocate enough space to also carve a node out if necessary. */
nsize = (node == NULL) ? CACHELINE_CEILING(sizeof(extent_node_t)) : 0;
csize = CHUNK_CEILING(minsize + nsize);
addr = chunk_alloc_base(csize);
if (addr == NULL) {
if (node != NULL)
base_node_dalloc_locked(node);
base_node_dalloc(node);
return (NULL);
}
if (node == NULL) {
@ -63,8 +65,13 @@ base_chunk_alloc(size_t minsize)
return (node);
}
static void *
base_alloc_locked(size_t size)
/*
* base_alloc() guarantees demand-zeroed memory, in order to make multi-page
* sparse data structures such as radix tree nodes efficient with respect to
* physical memory usage.
*/
void *
base_alloc(size_t size)
{
void *ret;
size_t csize;
@ -79,6 +86,7 @@ base_alloc_locked(size_t size)
key.addr = NULL;
key.size = csize;
malloc_mutex_lock(&base_mtx);
node = extent_tree_szad_nsearch(&base_avail_szad, &key);
if (node != NULL) {
/* Use existing space. */
@ -87,8 +95,10 @@ base_alloc_locked(size_t size)
/* Try to allocate more space. */
node = base_chunk_alloc(csize);
}
if (node == NULL)
return (NULL);
if (node == NULL) {
ret = NULL;
goto label_return;
}
ret = node->addr;
if (node->size > csize) {
@ -96,50 +106,15 @@ base_alloc_locked(size_t size)
node->size -= csize;
extent_tree_szad_insert(&base_avail_szad, node);
} else
base_node_dalloc_locked(node);
base_node_dalloc(node);
if (config_stats)
base_allocated += csize;
JEMALLOC_VALGRIND_MAKE_MEM_UNDEFINED(ret, csize);
return (ret);
}
/*
* base_alloc() guarantees demand-zeroed memory, in order to make multi-page
* sparse data structures such as radix tree nodes efficient with respect to
* physical memory usage.
*/
void *
base_alloc(size_t size)
{
void *ret;
malloc_mutex_lock(&base_mtx);
ret = base_alloc_locked(size);
label_return:
malloc_mutex_unlock(&base_mtx);
return (ret);
}
extent_node_t *
base_node_alloc(void)
{
extent_node_t *ret;
malloc_mutex_lock(&base_mtx);
if ((ret = base_node_try_alloc_locked()) == NULL)
ret = (extent_node_t *)base_alloc_locked(sizeof(extent_node_t));
malloc_mutex_unlock(&base_mtx);
return (ret);
}
void
base_node_dalloc(extent_node_t *node)
{
malloc_mutex_lock(&base_mtx);
base_node_dalloc_locked(node);
malloc_mutex_unlock(&base_mtx);
}
size_t
base_allocated_get(void)
{

265
src/chunk.c
View File

@ -7,19 +7,9 @@
const char *opt_dss = DSS_DEFAULT;
size_t opt_lg_chunk = LG_CHUNK_DEFAULT;
malloc_mutex_t chunks_mtx;
chunk_stats_t stats_chunks;
/*
* Trees of chunks that were previously allocated (trees differ only in node
* ordering). These are used when allocating chunks, in an attempt to re-use
* address space. Depending on function, different tree orderings are needed,
* which is why there are two trees with the same contents.
*/
static extent_tree_t chunks_szad_mmap;
static extent_tree_t chunks_ad_mmap;
static extent_tree_t chunks_szad_dss;
static extent_tree_t chunks_ad_dss;
/* Used exclusively for gdump triggering. */
static size_t curchunks;
static size_t highchunks;
rtree_t chunks_rtree;
@ -29,18 +19,51 @@ size_t chunksize_mask; /* (chunksize - 1). */
size_t chunk_npages;
/******************************************************************************/
bool
chunk_register(const void *chunk, const extent_node_t *node)
{
assert(node->addr == chunk);
if (rtree_set(&chunks_rtree, (uintptr_t)chunk, node))
return (true);
if (config_prof && opt_prof) {
size_t nadd = (node->size == 0) ? 1 : node->size / chunksize;
size_t cur = atomic_add_z(&curchunks, nadd);
size_t high = atomic_read_z(&highchunks);
while (cur > high && atomic_cas_z(&highchunks, high, cur)) {
/*
* Function prototypes for static functions that are referenced prior to
* definition.
* Don't refresh cur, because it may have decreased
* since this thread lost the highchunks update race.
*/
high = atomic_read_z(&highchunks);
}
if (cur > high && prof_gdump_get_unlocked())
prof_gdump();
}
static void chunk_dalloc_core(void *chunk, size_t size);
return (false);
}
/******************************************************************************/
void
chunk_deregister(const void *chunk, const extent_node_t *node)
{
bool err;
err = rtree_set(&chunks_rtree, (uintptr_t)chunk, NULL);
assert(!err);
if (config_prof && opt_prof) {
size_t nsub = (node->size == 0) ? 1 : node->size / chunksize;
assert(atomic_read_z(&curchunks) >= nsub);
atomic_sub_z(&curchunks, nsub);
}
}
static void *
chunk_recycle(extent_tree_t *chunks_szad, extent_tree_t *chunks_ad,
void *new_addr, size_t size, size_t alignment, bool base, bool *zero)
chunk_recycle(arena_t *arena, extent_tree_t *chunks_szad,
extent_tree_t *chunks_ad, void *new_addr, size_t size, size_t alignment,
bool *zero)
{
void *ret;
extent_node_t *node;
@ -50,27 +73,17 @@ chunk_recycle(extent_tree_t *chunks_szad, extent_tree_t *chunks_ad,
assert(new_addr == NULL || alignment == chunksize);
if (base) {
/*
* This function may need to call base_node_{,de}alloc(), but
* the current chunk allocation request is on behalf of the
* base allocator. Avoid deadlock (and if that weren't an
* issue, potential for infinite recursion) by returning NULL.
*/
return (NULL);
}
alloc_size = size + alignment - chunksize;
/* Beware size_t wrap-around. */
if (alloc_size < size)
return (NULL);
key.addr = new_addr;
key.size = alloc_size;
malloc_mutex_lock(&chunks_mtx);
malloc_mutex_lock(&arena->chunks_mtx);
node = (new_addr != NULL) ? extent_tree_ad_search(chunks_ad, &key) :
extent_tree_szad_nsearch(chunks_szad, &key);
if (node == NULL) {
malloc_mutex_unlock(&chunks_mtx);
malloc_mutex_unlock(&arena->chunks_mtx);
return (NULL);
}
leadsize = ALIGNMENT_CEILING((uintptr_t)node->addr, alignment) -
@ -95,20 +108,12 @@ chunk_recycle(extent_tree_t *chunks_szad, extent_tree_t *chunks_ad,
if (trailsize != 0) {
/* Insert the trailing space as a smaller chunk. */
if (node == NULL) {
/*
* An additional node is required, but
* base_node_alloc() can cause a new base chunk to be
* allocated. Drop chunks_mtx in order to avoid
* deadlock, and if node allocation fails, deallocate
* the result before returning an error.
*/
malloc_mutex_unlock(&chunks_mtx);
node = base_node_alloc();
node = arena_node_alloc(arena);
if (node == NULL) {
chunk_dalloc_core(ret, size);
malloc_mutex_unlock(&arena->chunks_mtx);
chunk_unmap(arena, ret, size);
return (NULL);
}
malloc_mutex_lock(&chunks_mtx);
}
node->addr = (void *)((uintptr_t)(ret) + size);
node->size = trailsize;
@ -117,10 +122,10 @@ chunk_recycle(extent_tree_t *chunks_szad, extent_tree_t *chunks_ad,
extent_tree_ad_insert(chunks_ad, node);
node = NULL;
}
malloc_mutex_unlock(&chunks_mtx);
malloc_mutex_unlock(&arena->chunks_mtx);
if (node != NULL)
base_node_dalloc(node);
arena_node_dalloc(arena, node);
if (*zero) {
if (!zeroed)
memset(ret, 0, size);
@ -137,15 +142,15 @@ chunk_recycle(extent_tree_t *chunks_szad, extent_tree_t *chunks_ad,
}
static void *
chunk_alloc_core_dss(void *new_addr, size_t size, size_t alignment, bool base,
bool *zero)
chunk_alloc_core_dss(arena_t *arena, void *new_addr, size_t size,
size_t alignment, bool *zero)
{
void *ret;
if ((ret = chunk_recycle(&chunks_szad_dss, &chunks_ad_dss,
new_addr, size, alignment, base, zero)) != NULL)
if ((ret = chunk_recycle(arena, &arena->chunks_szad_dss,
&arena->chunks_ad_dss, new_addr, size, alignment, zero)) != NULL)
return (ret);
ret = chunk_alloc_dss(new_addr, size, alignment, zero);
ret = chunk_alloc_dss(arena, new_addr, size, alignment, zero);
return (ret);
}
@ -156,7 +161,7 @@ chunk_alloc_core_dss(void *new_addr, size_t size, size_t alignment, bool base,
* them if they are returned.
*/
static void *
chunk_alloc_core(void *new_addr, size_t size, size_t alignment, bool base,
chunk_alloc_core(arena_t *arena, void *new_addr, size_t size, size_t alignment,
bool *zero, dss_prec_t dss_prec)
{
void *ret;
@ -168,12 +173,13 @@ chunk_alloc_core(void *new_addr, size_t size, size_t alignment, bool base,
/* "primary" dss. */
if (have_dss && dss_prec == dss_prec_primary && (ret =
chunk_alloc_core_dss(new_addr, size, alignment, base, zero)) !=
chunk_alloc_core_dss(arena, new_addr, size, alignment, zero)) !=
NULL)
return (ret);
/* mmap. */
if (!config_munmap && (ret = chunk_recycle(&chunks_szad_mmap,
&chunks_ad_mmap, new_addr, size, alignment, base, zero)) != NULL)
if (!config_munmap && (ret = chunk_recycle(arena,
&arena->chunks_szad_mmap, &arena->chunks_ad_mmap, new_addr, size,
alignment, zero)) != NULL)
return (ret);
/*
* Requesting an address is not implemented for chunk_alloc_mmap(), so
@ -184,7 +190,7 @@ chunk_alloc_core(void *new_addr, size_t size, size_t alignment, bool base,
return (ret);
/* "secondary" dss. */
if (have_dss && dss_prec == dss_prec_secondary && (ret =
chunk_alloc_core_dss(new_addr, size, alignment, base, zero)) !=
chunk_alloc_core_dss(arena, new_addr, size, alignment, zero)) !=
NULL)
return (ret);
@ -192,40 +198,6 @@ chunk_alloc_core(void *new_addr, size_t size, size_t alignment, bool base,
return (NULL);
}
static bool
chunk_register(void *chunk, size_t size, bool base)
{
assert(chunk != NULL);
assert(CHUNK_ADDR2BASE(chunk) == chunk);
if (config_ivsalloc && !base) {
if (rtree_set(&chunks_rtree, (uintptr_t)chunk, chunk))
return (true);
}
if (config_stats || config_prof) {
bool gdump;
malloc_mutex_lock(&chunks_mtx);
if (config_stats)
stats_chunks.nchunks += (size / chunksize);
stats_chunks.curchunks += (size / chunksize);
if (stats_chunks.curchunks > stats_chunks.highchunks) {
stats_chunks.highchunks =
stats_chunks.curchunks;
if (config_prof)
gdump = true;
} else if (config_prof)
gdump = false;
malloc_mutex_unlock(&chunks_mtx);
if (config_prof && opt_prof && prof_gdump_get_unlocked() &&
gdump)
prof_gdump();
}
if (config_valgrind)
JEMALLOC_VALGRIND_MAKE_MEM_UNDEFINED(chunk, size);
return (false);
}
void *
chunk_alloc_base(size_t size)
{
@ -239,10 +211,10 @@ chunk_alloc_base(size_t size)
*/
zero = true;
ret = chunk_alloc_mmap(size, chunksize, &zero);
if (ret != NULL && chunk_register(ret, size, true)) {
chunk_dalloc_core(ret, size);
ret = NULL;
}
if (ret == NULL)
return (NULL);
if (config_valgrind)
JEMALLOC_VALGRIND_MAKE_MEM_UNDEFINED(ret, size);
return (ret);
}
@ -255,18 +227,16 @@ chunk_alloc_arena(chunk_alloc_t *chunk_alloc, chunk_dalloc_t *chunk_dalloc,
void *ret;
ret = chunk_alloc(new_addr, size, alignment, zero, arena_ind);
if (ret != NULL && chunk_register(ret, size, false)) {
chunk_dalloc(ret, size, arena_ind);
ret = NULL;
}
if (ret == NULL)
return (NULL);
if (config_valgrind)
JEMALLOC_VALGRIND_MAKE_MEM_UNDEFINED(ret, size);
return (ret);
}
/* Default arena chunk allocation routine in the absence of user override. */
void *
chunk_alloc_default(void *new_addr, size_t size, size_t alignment, bool *zero,
unsigned arena_ind)
static arena_t *
chunk_arena_get(unsigned arena_ind)
{
arena_t *arena;
@ -278,32 +248,32 @@ chunk_alloc_default(void *new_addr, size_t size, size_t alignment, bool *zero,
* already.
*/
assert(arena != NULL);
return (arena);
}
return (chunk_alloc_core(new_addr, size, alignment, false, zero,
/* Default arena chunk allocation routine in the absence of user override. */
void *
chunk_alloc_default(void *new_addr, size_t size, size_t alignment, bool *zero,
unsigned arena_ind)
{
arena_t *arena;
arena = chunk_arena_get(arena_ind);
return (chunk_alloc_core(arena, new_addr, size, alignment, zero,
arena->dss_prec));
}
static void
chunk_record(extent_tree_t *chunks_szad, extent_tree_t *chunks_ad, void *chunk,
size_t size)
chunk_record(arena_t *arena, extent_tree_t *chunks_szad,
extent_tree_t *chunks_ad, void *chunk, size_t size)
{
bool unzeroed;
extent_node_t *xnode, *node, *prev, *xprev, key;
extent_node_t *node, *prev, key;
unzeroed = pages_purge(chunk, size);
JEMALLOC_VALGRIND_MAKE_MEM_NOACCESS(chunk, size);
/*
* Allocate a node before acquiring chunks_mtx even though it might not
* be needed, because base_node_alloc() may cause a new base chunk to
* be allocated, which could cause deadlock if chunks_mtx were already
* held.
*/
xnode = base_node_alloc();
/* Use xprev to implement conditional deferred deallocation of prev. */
xprev = NULL;
malloc_mutex_lock(&chunks_mtx);
malloc_mutex_lock(&arena->chunks_mtx);
key.addr = (void *)((uintptr_t)chunk + size);
node = extent_tree_ad_nsearch(chunks_ad, &key);
/* Try to coalesce forward. */
@ -320,17 +290,16 @@ chunk_record(extent_tree_t *chunks_szad, extent_tree_t *chunks_ad, void *chunk,
extent_tree_szad_insert(chunks_szad, node);
} else {
/* Coalescing forward failed, so insert a new node. */
if (xnode == NULL) {
node = arena_node_alloc(arena);
if (node == NULL) {
/*
* base_node_alloc() failed, which is an exceedingly
* Node allocation failed, which is an exceedingly
* unlikely failure. Leak chunk; its pages have
* already been purged, so this is only a virtual
* memory leak.
*/
goto label_return;
}
node = xnode;
xnode = NULL; /* Prevent deallocation below. */
node->addr = chunk;
node->size = size;
node->zeroed = !unzeroed;
@ -356,37 +325,15 @@ chunk_record(extent_tree_t *chunks_szad, extent_tree_t *chunks_ad, void *chunk,
node->zeroed = (node->zeroed && prev->zeroed);
extent_tree_szad_insert(chunks_szad, node);
xprev = prev;
arena_node_dalloc(arena, prev);
}
label_return:
malloc_mutex_unlock(&chunks_mtx);
/*
* Deallocate xnode and/or xprev after unlocking chunks_mtx in order to
* avoid potential deadlock.
*/
if (xnode != NULL)
base_node_dalloc(xnode);
if (xprev != NULL)
base_node_dalloc(xprev);
malloc_mutex_unlock(&arena->chunks_mtx);
}
void
chunk_unmap(void *chunk, size_t size)
{
assert(chunk != NULL);
assert(CHUNK_ADDR2BASE(chunk) == chunk);
assert(size != 0);
assert((size & chunksize_mask) == 0);
if (have_dss && chunk_in_dss(chunk))
chunk_record(&chunks_szad_dss, &chunks_ad_dss, chunk, size);
else if (chunk_dalloc_mmap(chunk, size))
chunk_record(&chunks_szad_mmap, &chunks_ad_mmap, chunk, size);
}
static void
chunk_dalloc_core(void *chunk, size_t size)
chunk_unmap(arena_t *arena, void *chunk, size_t size)
{
assert(chunk != NULL);
@ -394,16 +341,13 @@ chunk_dalloc_core(void *chunk, size_t size)
assert(size != 0);
assert((size & chunksize_mask) == 0);
if (config_ivsalloc)
rtree_set(&chunks_rtree, (uintptr_t)chunk, NULL);
if (config_stats || config_prof) {
malloc_mutex_lock(&chunks_mtx);
assert(stats_chunks.curchunks >= (size / chunksize));
stats_chunks.curchunks -= (size / chunksize);
malloc_mutex_unlock(&chunks_mtx);
if (have_dss && chunk_in_dss(chunk)) {
chunk_record(arena, &arena->chunks_szad_dss,
&arena->chunks_ad_dss, chunk, size);
} else if (chunk_dalloc_mmap(chunk, size)) {
chunk_record(arena, &arena->chunks_szad_mmap,
&arena->chunks_ad_mmap, chunk, size);
}
chunk_unmap(chunk, size);
}
/* Default arena chunk deallocation routine in the absence of user override. */
@ -411,7 +355,7 @@ bool
chunk_dalloc_default(void *chunk, size_t size, unsigned arena_ind)
{
chunk_dalloc_core(chunk, size);
chunk_unmap(chunk_arena_get(arena_ind), chunk, size);
return (false);
}
@ -433,21 +377,11 @@ chunk_boot(void)
chunksize_mask = chunksize - 1;
chunk_npages = (chunksize >> LG_PAGE);
if (malloc_mutex_init(&chunks_mtx))
return (true);
if (config_stats || config_prof)
memset(&stats_chunks, 0, sizeof(chunk_stats_t));
if (have_dss && chunk_dss_boot())
return (true);
extent_tree_szad_new(&chunks_szad_mmap);
extent_tree_ad_new(&chunks_ad_mmap);
extent_tree_szad_new(&chunks_szad_dss);
extent_tree_ad_new(&chunks_ad_dss);
if (config_ivsalloc) {
if (rtree_new(&chunks_rtree, (ZU(1) << (LG_SIZEOF_PTR+3)) -
opt_lg_chunk, chunks_rtree_node_alloc, NULL))
return (true);
}
return (false);
}
@ -456,7 +390,6 @@ void
chunk_prefork(void)
{
malloc_mutex_prefork(&chunks_mtx);
chunk_dss_prefork();
}
@ -465,7 +398,6 @@ chunk_postfork_parent(void)
{
chunk_dss_postfork_parent();
malloc_mutex_postfork_parent(&chunks_mtx);
}
void
@ -473,5 +405,4 @@ chunk_postfork_child(void)
{
chunk_dss_postfork_child();
malloc_mutex_postfork_child(&chunks_mtx);
}

5
src/chunk_dss.c
View File

@ -66,7 +66,8 @@ chunk_dss_prec_set(dss_prec_t dss_prec)
}
void *
chunk_alloc_dss(void *new_addr, size_t size, size_t alignment, bool *zero)
chunk_alloc_dss(arena_t *arena, void *new_addr, size_t size, size_t alignment,
bool *zero)
{
void *ret;
@ -133,7 +134,7 @@ chunk_alloc_dss(void *new_addr, size_t size, size_t alignment, bool *zero)
dss_max = dss_next;
malloc_mutex_unlock(&dss_mtx);
if (cpad_size != 0)
chunk_unmap(cpad, cpad_size);
chunk_unmap(arena, cpad, cpad_size);
if (*zero) {
JEMALLOC_VALGRIND_MAKE_MEM_UNDEFINED(
ret, size);

26
src/ctl.c
View File

@ -144,9 +144,6 @@ CTL_PROTO(prof_gdump)
CTL_PROTO(prof_reset)
CTL_PROTO(prof_interval)
CTL_PROTO(lg_prof_sample)
CTL_PROTO(stats_chunks_current)
CTL_PROTO(stats_chunks_total)
CTL_PROTO(stats_chunks_high)
CTL_PROTO(stats_arenas_i_small_allocated)
CTL_PROTO(stats_arenas_i_small_nmalloc)
CTL_PROTO(stats_arenas_i_small_ndalloc)
@ -363,12 +360,6 @@ static const ctl_named_node_t prof_node[] = {
{NAME("lg_sample"), CTL(lg_prof_sample)}
};
static const ctl_named_node_t stats_chunks_node[] = {
{NAME("current"), CTL(stats_chunks_current)},
{NAME("total"), CTL(stats_chunks_total)},
{NAME("high"), CTL(stats_chunks_high)}
};
static const ctl_named_node_t stats_arenas_i_metadata_node[] = {
{NAME("mapped"), CTL(stats_arenas_i_metadata_mapped)},
{NAME("allocated"), CTL(stats_arenas_i_metadata_allocated)}
@ -473,7 +464,6 @@ static const ctl_named_node_t stats_node[] = {
{NAME("active"), CTL(stats_active)},
{NAME("metadata"), CTL(stats_metadata)},
{NAME("mapped"), CTL(stats_mapped)},
{NAME("chunks"), CHILD(named, stats_chunks)},
{NAME("arenas"), CHILD(indexed, stats_arenas)}
};
@ -688,14 +678,6 @@ ctl_refresh(void)
unsigned i;
VARIABLE_ARRAY(arena_t *, tarenas, ctl_stats.narenas);
if (config_stats) {
malloc_mutex_lock(&chunks_mtx);
ctl_stats.chunks.current = stats_chunks.curchunks;
ctl_stats.chunks.total = stats_chunks.nchunks;
ctl_stats.chunks.high = stats_chunks.highchunks;
malloc_mutex_unlock(&chunks_mtx);
}
/*
* Clear sum stats, since they will be merged into by
* ctl_arena_refresh().
@ -733,7 +715,8 @@ ctl_refresh(void)
+ ctl_stats.arenas[ctl_stats.narenas].astats.metadata_mapped
+ ctl_stats.arenas[ctl_stats.narenas].astats
.metadata_allocated;
ctl_stats.mapped = (ctl_stats.chunks.current << opt_lg_chunk);
ctl_stats.mapped =
ctl_stats.arenas[ctl_stats.narenas].astats.mapped;
}
ctl_epoch++;
@ -1950,11 +1933,6 @@ CTL_RO_CGEN(config_stats, stats_active, ctl_stats.active, size_t)
CTL_RO_CGEN(config_stats, stats_metadata, ctl_stats.metadata, size_t)
CTL_RO_CGEN(config_stats, stats_mapped, ctl_stats.mapped, size_t)
CTL_RO_CGEN(config_stats, stats_chunks_current, ctl_stats.chunks.current,
size_t)
CTL_RO_CGEN(config_stats, stats_chunks_total, ctl_stats.chunks.total, uint64_t)
CTL_RO_CGEN(config_stats, stats_chunks_high, ctl_stats.chunks.high, size_t)
CTL_RO_GEN(stats_arenas_i_dss, ctl_stats.arenas[mib[2]].dss, const char *)
CTL_RO_GEN(stats_arenas_i_nthreads, ctl_stats.arenas[mib[2]].nthreads, unsigned)
CTL_RO_GEN(stats_arenas_i_pactive, ctl_stats.arenas[mib[2]].pactive, size_t)

169
src/huge.c
View File

@ -2,15 +2,33 @@
#include "jemalloc/internal/jemalloc_internal.h"
/******************************************************************************/
/* Data. */
/* Protects chunk-related data structures. */
static malloc_mutex_t huge_mtx;
static extent_node_t *
huge_node_get(const void *ptr)
{
extent_node_t *node;
/******************************************************************************/
node = chunk_lookup(ptr);
assert(node->size != 0);
/* Tree of chunks that are stand-alone huge allocations. */
static extent_tree_t huge;
return (node);
}
static bool
huge_node_set(const void *ptr, extent_node_t *node)
{
assert(node->addr == ptr);
assert(node->size != 0);
return (chunk_register(ptr, node));
}
static void
huge_node_unset(const void *ptr, const extent_node_t *node)
{
chunk_deregister(ptr, node);
}
void *
huge_malloc(tsd_t *tsd, arena_t *arena, size_t size, bool zero,
@ -55,15 +73,22 @@ huge_palloc(tsd_t *tsd, arena_t *arena, size_t usize, size_t alignment,
return (NULL);
}
/* Insert node into huge. */
node->addr = ret;
node->size = usize;
node->zeroed = is_zeroed;
node->arena = arena;
malloc_mutex_lock(&huge_mtx);
extent_tree_ad_insert(&huge, node);
malloc_mutex_unlock(&huge_mtx);
if (huge_node_set(ret, node)) {
arena_chunk_dalloc_huge(arena, ret, usize);
idalloctm(tsd, node, tcache, true);
return (NULL);
}
/* Insert node into huge. */
malloc_mutex_lock(&arena->huge_mtx);
ql_elm_new(node, link_ql);
ql_tail_insert(&arena->huge, node, link_ql);
malloc_mutex_unlock(&arena->huge_mtx);
if (zero || (config_fill && unlikely(opt_zero))) {
if (!is_zeroed)
@ -74,32 +99,6 @@ huge_palloc(tsd_t *tsd, arena_t *arena, size_t usize, size_t alignment,
return (ret);
}
static extent_node_t *
huge_node_locked(const void *ptr)
{
extent_node_t *node, key;
/* Extract from tree of huge allocations. */
key.addr = __DECONST(void *, ptr);
node = extent_tree_ad_search(&huge, &key);
assert(node != NULL);
assert(node->addr == ptr);
return (node);
}
static extent_node_t *
huge_node(const void *ptr)
{
extent_node_t *node;
malloc_mutex_lock(&huge_mtx);
node = huge_node_locked(ptr);
malloc_mutex_unlock(&huge_mtx);
return (node);
}
#ifdef JEMALLOC_JET
#undef huge_dalloc_junk
#define huge_dalloc_junk JEMALLOC_N(huge_dalloc_junk_impl)
@ -152,15 +151,15 @@ huge_ralloc_no_move_similar(void *ptr, size_t oldsize, size_t usize,
} else
zeroed = true;
malloc_mutex_lock(&huge_mtx);
node = huge_node_locked(ptr);
node = huge_node_get(ptr);
arena = node->arena;
malloc_mutex_lock(&arena->huge_mtx);
/* Update the size of the huge allocation. */
assert(node->size != usize);
node->size = usize;
/* Clear node->zeroed if zeroing failed above. */
node->zeroed = (node->zeroed && zeroed);
malloc_mutex_unlock(&huge_mtx);
malloc_mutex_unlock(&arena->huge_mtx);
arena_chunk_ralloc_huge_similar(arena, ptr, oldsize, usize);
@ -195,14 +194,14 @@ huge_ralloc_no_move_shrink(void *ptr, size_t oldsize, size_t usize)
zeroed = false;
}
malloc_mutex_lock(&huge_mtx);
node = huge_node_locked(ptr);
node = huge_node_get(ptr);
arena = node->arena;
malloc_mutex_lock(&arena->huge_mtx);
/* Update the size of the huge allocation. */
node->size = usize;
/* Clear node->zeroed if zeroing failed above. */
node->zeroed = (node->zeroed && zeroed);
malloc_mutex_unlock(&huge_mtx);
malloc_mutex_unlock(&arena->huge_mtx);
/* Zap the excess chunks. */
arena_chunk_ralloc_huge_shrink(arena, ptr, oldsize, usize);
@ -221,11 +220,11 @@ huge_ralloc_no_move_expand(void *ptr, size_t oldsize, size_t size, bool zero) {
return (true);
}
malloc_mutex_lock(&huge_mtx);
node = huge_node_locked(ptr);
node = huge_node_get(ptr);
arena = node->arena;
malloc_mutex_lock(&arena->huge_mtx);
is_zeroed_subchunk = node->zeroed;
malloc_mutex_unlock(&huge_mtx);
malloc_mutex_unlock(&arena->huge_mtx);
/*
* Copy zero into is_zeroed_chunk and pass the copy to chunk_alloc(), so
@ -237,10 +236,10 @@ huge_ralloc_no_move_expand(void *ptr, size_t oldsize, size_t size, bool zero) {
&is_zeroed_chunk))
return (true);
malloc_mutex_lock(&huge_mtx);
malloc_mutex_lock(&arena->huge_mtx);
/* Update the size of the huge allocation. */
node->size = usize;
malloc_mutex_unlock(&huge_mtx);
malloc_mutex_unlock(&arena->huge_mtx);
if (zero || (config_fill && unlikely(opt_zero))) {
if (!is_zeroed_subchunk) {
@ -356,11 +355,14 @@ void
huge_dalloc(tsd_t *tsd, void *ptr, tcache_t *tcache)
{
extent_node_t *node;
arena_t *arena;
malloc_mutex_lock(&huge_mtx);
node = huge_node_locked(ptr);
extent_tree_ad_remove(&huge, node);
malloc_mutex_unlock(&huge_mtx);
node = huge_node_get(ptr);
arena = node->arena;
huge_node_unset(ptr, node);
malloc_mutex_lock(&arena->huge_mtx);
ql_remove(&arena->huge, node, link_ql);
malloc_mutex_unlock(&arena->huge_mtx);
huge_dalloc_junk(node->addr, node->size);
arena_chunk_dalloc_huge(node->arena, node->addr, node->size);
@ -371,59 +373,50 @@ arena_t *
huge_aalloc(const void *ptr)
{
return (huge_node(ptr)->arena);
return (huge_node_get(ptr)->arena);
}
size_t
huge_salloc(const void *ptr)
{
size_t size;
extent_node_t *node;
arena_t *arena;
return (huge_node(ptr)->size);
node = huge_node_get(ptr);
arena = node->arena;
malloc_mutex_lock(&arena->huge_mtx);
size = node->size;
malloc_mutex_unlock(&arena->huge_mtx);
return (size);
}
prof_tctx_t *
huge_prof_tctx_get(const void *ptr)
{
prof_tctx_t *tctx;
extent_node_t *node;
arena_t *arena;
return (huge_node(ptr)->prof_tctx);
node = huge_node_get(ptr);
arena = node->arena;
malloc_mutex_lock(&arena->huge_mtx);
tctx = node->prof_tctx;
malloc_mutex_unlock(&arena->huge_mtx);
return (tctx);
}
void
huge_prof_tctx_set(const void *ptr, prof_tctx_t *tctx)
{
extent_node_t *node;
arena_t *arena;
huge_node(ptr)->prof_tctx = tctx;
}
bool
huge_boot(void)
{
/* Initialize chunks data. */
if (malloc_mutex_init(&huge_mtx))
return (true);
extent_tree_ad_new(&huge);
return (false);
}
void
huge_prefork(void)
{
malloc_mutex_prefork(&huge_mtx);
}
void
huge_postfork_parent(void)
{
malloc_mutex_postfork_parent(&huge_mtx);
}
void
huge_postfork_child(void)
{
malloc_mutex_postfork_child(&huge_mtx);
node = huge_node_get(ptr);
arena = node->arena;
malloc_mutex_lock(&arena->huge_mtx);
node->prof_tctx = tctx;
malloc_mutex_unlock(&arena->huge_mtx);
}

15
src/jemalloc.c
View File

@ -1195,8 +1195,6 @@ malloc_init_hard_a0_locked(void)
return (true);
if (config_tcache && tcache_boot())
malloc_mutex_unlock(&init_lock);
if (huge_boot())
return (true);
if (malloc_mutex_init(&arenas_lock))
return (true);
/*
@ -2310,12 +2308,10 @@ je_sallocx(const void *ptr, int flags)
assert(malloc_initialized() || IS_INITIALIZER);
malloc_thread_init();
if (config_ivsalloc)
if (config_debug)
usize = ivsalloc(ptr, config_prof);
else {
assert(ptr != NULL);
else
usize = isalloc(ptr, config_prof);
}
return (usize);
}
@ -2440,10 +2436,10 @@ je_malloc_usable_size(JEMALLOC_USABLE_SIZE_CONST void *ptr)
assert(malloc_initialized() || IS_INITIALIZER);
malloc_thread_init();
if (config_ivsalloc)
if (config_debug)
ret = ivsalloc(ptr, config_prof);
else
ret = (ptr != NULL) ? isalloc(ptr, config_prof) : 0;
ret = (ptr == NULL) ? 0 : isalloc(ptr, config_prof);
return (ret);
}
@ -2504,7 +2500,6 @@ _malloc_prefork(void)
}
chunk_prefork();
base_prefork();
huge_prefork();
}
#ifndef JEMALLOC_MUTEX_INIT_CB
@ -2524,7 +2519,6 @@ _malloc_postfork(void)
assert(malloc_initialized());
/* Release all mutexes, now that fork() has completed. */
huge_postfork_parent();
base_postfork_parent();
chunk_postfork_parent();
for (i = 0; i < narenas_total; i++) {
@ -2544,7 +2538,6 @@ jemalloc_postfork_child(void)
assert(malloc_initialized());
/* Release all mutexes, now that fork() has completed. */
huge_postfork_child();
base_postfork_child();
chunk_postfork_child();
for (i = 0; i < narenas_total; i++) {

12
src/stats.c
View File

@ -547,8 +547,6 @@ stats_print(void (*write_cb)(void *, const char *), void *cbopaque,
if (config_stats) {
size_t *cactive;
size_t allocated, active, metadata, mapped;
size_t chunks_current, chunks_high;
uint64_t chunks_total;
CTL_GET("stats.cactive", &cactive, size_t *);
CTL_GET("stats.allocated", &allocated, size_t);
@ -561,16 +559,6 @@ stats_print(void (*write_cb)(void *, const char *), void *cbopaque,
malloc_cprintf(write_cb, cbopaque,
"Current active ceiling: %zu\n", atomic_read_z(cactive));
/* Print chunk stats. */
CTL_GET("stats.chunks.total", &chunks_total, uint64_t);
CTL_GET("stats.chunks.high", &chunks_high, size_t);
CTL_GET("stats.chunks.current", &chunks_current, size_t);
malloc_cprintf(write_cb, cbopaque, "chunks: nchunks "
"highchunks curchunks\n");
malloc_cprintf(write_cb, cbopaque,
" %13"PRIu64" %12zu %12zu\n",
chunks_total, chunks_high, chunks_current);
if (merged) {
unsigned narenas;

8
src/tcache.c
View File

@ -102,7 +102,7 @@ tcache_bin_flush_small(tsd_t *tsd, tcache_bin_t *tbin, index_t binind,
/* Lock the arena bin associated with the first object. */
arena_chunk_t *chunk = (arena_chunk_t *)CHUNK_ADDR2BASE(
tbin->avail[0]);
arena_t *bin_arena = chunk->arena;
arena_t *bin_arena = chunk->node.arena;
arena_bin_t *bin = &bin_arena->bins[binind];
if (config_prof && bin_arena == arena) {
@ -124,7 +124,7 @@ tcache_bin_flush_small(tsd_t *tsd, tcache_bin_t *tbin, index_t binind,
ptr = tbin->avail[i];
assert(ptr != NULL);
chunk = (arena_chunk_t *)CHUNK_ADDR2BASE(ptr);
if (chunk->arena == bin_arena) {
if (chunk->node.arena == bin_arena) {
size_t pageind = ((uintptr_t)ptr -
(uintptr_t)chunk) >> LG_PAGE;
arena_chunk_map_bits_t *bitselm =
@ -182,7 +182,7 @@ tcache_bin_flush_large(tsd_t *tsd, tcache_bin_t *tbin, index_t binind,
/* Lock the arena associated with the first object. */
arena_chunk_t *chunk = (arena_chunk_t *)CHUNK_ADDR2BASE(
tbin->avail[0]);
arena_t *locked_arena = chunk->arena;
arena_t *locked_arena = chunk->node.arena;
UNUSED bool idump;
if (config_prof)
@ -208,7 +208,7 @@ tcache_bin_flush_large(tsd_t *tsd, tcache_bin_t *tbin, index_t binind,
ptr = tbin->avail[i];
assert(ptr != NULL);
chunk = (arena_chunk_t *)CHUNK_ADDR2BASE(ptr);
if (chunk->arena == locked_arena) {
if (chunk->node.arena == locked_arena) {
arena_dalloc_large_junked_locked(locked_arena,
chunk, ptr);
} else {

27
test/unit/stats.c
View File

@ -29,32 +29,6 @@ TEST_BEGIN(test_stats_summary)
}
TEST_END
TEST_BEGIN(test_stats_chunks)
{
size_t current, high;
uint64_t total;
size_t sz;
int expected = config_stats ? 0 : ENOENT;
sz = sizeof(size_t);
assert_d_eq(mallctl("stats.chunks.current", &current, &sz, NULL, 0),
expected, "Unexpected mallctl() result");
sz = sizeof(uint64_t);
assert_d_eq(mallctl("stats.chunks.total", &total, &sz, NULL, 0),
expected, "Unexpected mallctl() result");
sz = sizeof(size_t);
assert_d_eq(mallctl("stats.chunks.high", &high, &sz, NULL, 0), expected,
"Unexpected mallctl() result");
if (config_stats) {
assert_zu_le(current, high,
"current should be no larger than high");
assert_u64_le((uint64_t)high, total,
"high should be no larger than total");
}
}
TEST_END
TEST_BEGIN(test_stats_huge)
{
void *p;
@ -458,7 +432,6 @@ main(void)
return (test(
test_stats_summary,
test_stats_chunks,
test_stats_huge,
test_stats_arenas_summary,
test_stats_arenas_small,