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Prefer old/low extent_t structures during reuse.

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Rather than using a LIFO queue to track available extent_t structures,
use a red-black tree, and always choose the oldest/lowest available
during reuse.
This commit is contained in:
Jason Evans 2017-04-16 22:31:16 -07:00
parent 76b35f4b2f
commit 881fbf762f
10 changed files with 80 additions and 37 deletions
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14
src/arena.c
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@ -314,8 +314,8 @@ arena_stats_merge(tsdn_t *tsdn, arena_t *arena, unsigned *nthreads,
/* Gather per arena mutex profiling data. */
READ_ARENA_MUTEX_PROF_DATA(large_mtx, arena_prof_mutex_large);
READ_ARENA_MUTEX_PROF_DATA(extent_freelist_mtx,
arena_prof_mutex_extent_freelist)
READ_ARENA_MUTEX_PROF_DATA(extent_avail_mtx,
arena_prof_mutex_extent_avail)
READ_ARENA_MUTEX_PROF_DATA(extents_dirty.mtx,
arena_prof_mutex_extents_dirty)
READ_ARENA_MUTEX_PROF_DATA(extents_muzzy.mtx,
@ -1937,8 +1937,8 @@ arena_new(tsdn_t *tsdn, unsigned ind, extent_hooks_t *extent_hooks) {
ATOMIC_RELAXED);
}
extent_list_init(&arena->extent_freelist);
if (malloc_mutex_init(&arena->extent_freelist_mtx, "extent_freelist",
extent_avail_new(&arena->extent_avail);
if (malloc_mutex_init(&arena->extent_avail_mtx, "extent_avail",
WITNESS_RANK_EXTENT_FREELIST)) {
goto label_error;
}
@ -2007,7 +2007,7 @@ arena_prefork2(tsdn_t *tsdn, arena_t *arena) {
void
arena_prefork3(tsdn_t *tsdn, arena_t *arena) {
malloc_mutex_prefork(tsdn, &arena->extent_freelist_mtx);
malloc_mutex_prefork(tsdn, &arena->extent_avail_mtx);
}
void
@ -2036,7 +2036,7 @@ arena_postfork_parent(tsdn_t *tsdn, arena_t *arena) {
}
malloc_mutex_postfork_parent(tsdn, &arena->large_mtx);
base_postfork_parent(tsdn, arena->base);
malloc_mutex_postfork_parent(tsdn, &arena->extent_freelist_mtx);
malloc_mutex_postfork_parent(tsdn, &arena->extent_avail_mtx);
extents_postfork_parent(tsdn, &arena->extents_dirty);
extents_postfork_parent(tsdn, &arena->extents_muzzy);
extents_postfork_parent(tsdn, &arena->extents_retained);
@ -2056,7 +2056,7 @@ arena_postfork_child(tsdn_t *tsdn, arena_t *arena) {
}
malloc_mutex_postfork_child(tsdn, &arena->large_mtx);
base_postfork_child(tsdn, arena->base);
malloc_mutex_postfork_child(tsdn, &arena->extent_freelist_mtx);
malloc_mutex_postfork_child(tsdn, &arena->extent_avail_mtx);
extents_postfork_child(tsdn, &arena->extents_dirty);
extents_postfork_child(tsdn, &arena->extents_muzzy);
extents_postfork_child(tsdn, &arena->extents_retained);