project-base/server-skynet-source-3rd-jemalloc
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Avoid taking extents_muzzy mutex when muzzy is disabled.

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When muzzy decay is disabled, no need to allocate from extents_muzzy.  This
saves us a couple of mutex operations down the extents_alloc path.
This commit is contained in:
Qi Wang 2018-05-24 12:18:54 -07:00 committed by Qi Wang
parent a7f749c9af
commit d22e150320
1 changed files with 7 additions and 2 deletions
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9
src/arena.c
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@ -324,6 +324,11 @@ arena_large_ralloc_stats_update(tsdn_t *tsdn, arena_t *arena, size_t oldusize,
arena_large_malloc_stats_update(tsdn, arena, usize); arena_large_malloc_stats_update(tsdn, arena, usize);
} }
static bool
arena_may_have_muzzy(arena_t *arena) {
return (pages_can_purge_lazy && (arena_muzzy_decay_ms_get(arena) != 0));
}
extent_t * extent_t *
arena_extent_alloc_large(tsdn_t *tsdn, arena_t *arena, size_t usize, arena_extent_alloc_large(tsdn_t *tsdn, arena_t *arena, size_t usize,
size_t alignment, bool *zero) { size_t alignment, bool *zero) {
@ -338,7 +343,7 @@ arena_extent_alloc_large(tsdn_t *tsdn, arena_t *arena, size_t usize,
extent_t *extent = extents_alloc(tsdn, arena, &extent_hooks, extent_t *extent = extents_alloc(tsdn, arena, &extent_hooks,
&arena->extents_dirty, NULL, usize, sz_large_pad, alignment, false, &arena->extents_dirty, NULL, usize, sz_large_pad, alignment, false,
szind, zero, &commit); szind, zero, &commit);
if (extent == NULL) { if (extent == NULL && arena_may_have_muzzy(arena)) {
extent = extents_alloc(tsdn, arena, &extent_hooks, extent = extents_alloc(tsdn, arena, &extent_hooks,
&arena->extents_muzzy, NULL, usize, sz_large_pad, alignment, &arena->extents_muzzy, NULL, usize, sz_large_pad, alignment,
false, szind, zero, &commit); false, szind, zero, &commit);
@ -1124,7 +1129,7 @@ arena_slab_alloc(tsdn_t *tsdn, arena_t *arena, szind_t binind,
extent_t *slab = extents_alloc(tsdn, arena, &extent_hooks, extent_t *slab = extents_alloc(tsdn, arena, &extent_hooks,
&arena->extents_dirty, NULL, bin_info->slab_size, 0, PAGE, true, &arena->extents_dirty, NULL, bin_info->slab_size, 0, PAGE, true,
binind, &zero, &commit); binind, &zero, &commit);
if (slab == NULL) { if (slab == NULL && arena_may_have_muzzy(arena)) {
slab = extents_alloc(tsdn, arena, &extent_hooks, slab = extents_alloc(tsdn, arena, &extent_hooks,
&arena->extents_muzzy, NULL, bin_info->slab_size, 0, PAGE, &arena->extents_muzzy, NULL, bin_info->slab_size, 0, PAGE,
true, binind, &zero, &commit); true, binind, &zero, &commit);