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Optimize max_active_fit in first_fit.

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Stop scanning once reached the first max_active_fit size.
This commit is contained in:
Qi Wang 2019-07-23 12:49:17 -07:00 committed by Qi Wang
parent 4e36ce34c1
commit 1d148f353a
1 changed files with 2 additions and 4 deletions
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6
src/extent.c
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@ -453,7 +453,6 @@ extents_first_fit_locked(tsdn_t *tsdn, arena_t *arena, extents_t *extents,
assert(!extent_heap_empty(&extents->heaps[i])); assert(!extent_heap_empty(&extents->heaps[i]));
extent_t *extent = extent_heap_first(&extents->heaps[i]); extent_t *extent = extent_heap_first(&extents->heaps[i]);
assert(extent_size_get(extent) >= size); assert(extent_size_get(extent) >= size);
bool size_ok = true;
/* /*
* In order to reduce fragmentation, avoid reusing and splitting * In order to reduce fragmentation, avoid reusing and splitting
* large extents for much smaller sizes. * large extents for much smaller sizes.
@ -462,10 +461,9 @@ extents_first_fit_locked(tsdn_t *tsdn, arena_t *arena, extents_t *extents,
*/ */
if (extents->delay_coalesce && if (extents->delay_coalesce &&
(sz_pind2sz(i) >> opt_lg_extent_max_active_fit) > size) { (sz_pind2sz(i) >> opt_lg_extent_max_active_fit) > size) {
size_ok = false; break;
} }
if (size_ok && if (ret == NULL || extent_snad_comp(extent, ret) < 0) {
(ret == NULL || extent_snad_comp(extent, ret) < 0)) {
ret = extent; ret = extent;
} }
if (i == SC_NPSIZES) { if (i == SC_NPSIZES) {