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Add per-thread cache to malloc

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* config.make.in: Enable experimental malloc option.
* configure.ac: Likewise.
* configure: Regenerate.
* manual/install.texi: Document it.
* INSTALL: Regenerate.
* malloc/Makefile: Likewise.
* malloc/malloc.c: Add per-thread cache (tcache).
(tcache_put): New.
(tcache_get): New.
(tcache_thread_freeres): New.
(tcache_init): New.
(__libc_malloc): Use cached chunks if available.
(__libc_free): Initialize tcache if needed.
(__libc_realloc): Likewise.
(__libc_calloc): Likewise.
(_int_malloc): Prefill tcache when appropriate.
(_int_free): Likewise.
(do_set_tcache_max): New.
(do_set_tcache_count): New.
(do_set_tcache_unsorted_limit): New.
* manual/probes.texi: Document new probes.
* malloc/arena.c: Add new tcache tunables.
* elf/dl-tunables.list: Likewise.
* manual/tunables.texi: Document them.
* NEWS: Mention the per-thread cache.
This commit is contained in:
DJ Delorie
2017-07-06 13:37:30 -04:00
parent 3cefdd7310
commit d5c3fafc43
13 changed files with 490 additions and 9 deletions
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11
malloc/arena.c
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@ -236,6 +236,11 @@ TUNABLE_CALLBACK_FNDECL (set_perturb_byte, int32_t)
TUNABLE_CALLBACK_FNDECL (set_trim_threshold, size_t)
TUNABLE_CALLBACK_FNDECL (set_arena_max, size_t)
TUNABLE_CALLBACK_FNDECL (set_arena_test, size_t)
#if USE_TCACHE
TUNABLE_CALLBACK_FNDECL (set_tcache_max, size_t)
TUNABLE_CALLBACK_FNDECL (set_tcache_count, size_t)
TUNABLE_CALLBACK_FNDECL (set_tcache_unsorted_limit, size_t)
#endif
#else
/* Initialization routine. */
#include <string.h>
@ -322,6 +327,12 @@ ptmalloc_init (void)
TUNABLE_GET (mmap_max, int32_t, TUNABLE_CALLBACK (set_mmaps_max));
TUNABLE_GET (arena_max, size_t, TUNABLE_CALLBACK (set_arena_max));
TUNABLE_GET (arena_test, size_t, TUNABLE_CALLBACK (set_arena_test));
#if USE_TCACHE
TUNABLE_GET (tcache_max, size_t, TUNABLE_CALLBACK (set_tcache_max));
TUNABLE_GET (tcache_count, size_t, TUNABLE_CALLBACK (set_tcache_count));
TUNABLE_GET (tcache_unsorted_limit, size_t,
TUNABLE_CALLBACK (set_tcache_unsorted_limit));
#endif
__libc_lock_unlock (main_arena.mutex);
#else
const char *s = NULL;