project-base/server-skynet-source-3rd-jemalloc
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Avoid touching all pages in extent_recycle for debug build.

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We may have a large number of pages with *zero set (since they are populated on
demand).  Only check the first page to avoid paging in all of them.
This commit is contained in:
Qi Wang 2018-11-12 11:15:03 -08:00 committed by Qi Wang
parent 1f56115704
commit 57553c3b1a
1 changed files with 3 additions and 2 deletions
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5
src/extent.c
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@ -1162,14 +1162,15 @@ extent_recycle(tsdn_t *tsdn, arena_t *arena, extent_hooks_t **r_extent_hooks,
if (*zero) {
void *addr = extent_base_get(extent);
size_t size = extent_size_get(extent);
if (!extent_zeroed_get(extent)) {
size_t size = extent_size_get(extent);
if (pages_purge_forced(addr, size)) {
memset(addr, 0, size);
}
} else if (config_debug) {
size_t *p = (size_t *)(uintptr_t)addr;
for (size_t i = 0; i < size / sizeof(size_t); i++) {
/* Check the first page only. */
for (size_t i = 0; i < PAGE / sizeof(size_t); i++) {
assert(p[i] == 0);
}
}