project-base/server-skynet-source-3rd-jemalloc
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Eagerly purge oversized merged extents.

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This change improves memory usage slightly, at virtually no CPU cost.
This commit is contained in:
Qi Wang
2019-03-12 15:02:41 -07:00
committed by Qi Wang
parent f6c30cbafa
commit fb56766ca9
3 changed files with 36 additions and 3 deletions
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12
test/unit/decay.c
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@@ -121,6 +121,12 @@ get_arena_dirty_npurge(unsigned arena_ind) {
return get_arena_npurge_impl("stats.arenas.0.dirty_npurge", arena_ind);
}
static uint64_t
get_arena_dirty_purged(unsigned arena_ind) {
do_epoch();
return get_arena_npurge_impl("stats.arenas.0.dirty_purged", arena_ind);
}
static uint64_t
get_arena_muzzy_npurge(unsigned arena_ind) {
do_epoch();
@@ -559,7 +565,7 @@ TEST_BEGIN(test_decay_now) {
TEST_END
TEST_BEGIN(test_decay_never) {
test_skip_if(check_background_thread_enabled());
test_skip_if(check_background_thread_enabled() || !config_stats);
unsigned arena_ind = do_arena_create(-1, -1);
int flags = MALLOCX_ARENA(arena_ind) | MALLOCX_TCACHE_NONE;
@@ -579,8 +585,8 @@ TEST_BEGIN(test_decay_never) {
dallocx(ptrs[i], flags);
size_t pdirty = get_arena_pdirty(arena_ind);
size_t pmuzzy = get_arena_pmuzzy(arena_ind);
assert_zu_gt(pdirty, pdirty_prev,
"Expected dirty pages to increase.");
assert_zu_gt(pdirty + (size_t)get_arena_dirty_purged(arena_ind),
pdirty_prev, "Expected dirty pages to increase.");
assert_zu_eq(pmuzzy, 0, "Unexpected muzzy pages");
pdirty_prev = pdirty;
}