romenskiy2012/jemalloc
1
0
Fork 0
mirror of https://github.com/jemalloc/jemalloc.git synced 2026-08-26 09:03:33 +03:00
Code Issues Projects Releases Packages Wiki Activity

Prefer pages_purge_forced() over memset().

Browse source 
This has the dual advantages of allowing for sparsely used large
allocations, and relying on the kernel to supply zeroed pages, which
tends to be very fast on modern systems.
This commit is contained in:
Jason Evans 2017-03-09 17:20:00 -08:00
parent 28078274c4
commit 26d23da6cd
2 changed files with 30 additions and 16 deletions
Download patch file Download diff file Expand all files Collapse all files

13
src/extent.c
View file

@ -759,8 +759,11 @@ extent_recycle(tsdn_t *tsdn, arena_t *arena, extent_hooks_t **r_extent_hooks,
if (*zero) {
if (!extent_zeroed_get(extent)) {
memset(extent_addr_get(extent), 0,
extent_usize_get(extent));
if (pages_purge_forced(extent_base_get(extent),
extent_size_get(extent))) {
memset(extent_addr_get(extent), 0,
extent_usize_get(extent));
}
} else if (config_debug) {
size_t i;
size_t *p = (size_t *)(uintptr_t)
@ -971,7 +974,11 @@ extent_grow_retained(tsdn_t *tsdn, arena_t *arena,
extent_interior_register(tsdn, rtree_ctx, extent);
}
if (*zero && !extent_zeroed_get(extent)) {
memset(extent_addr_get(extent), 0, extent_usize_get(extent));
if (pages_purge_forced(extent_base_get(extent),
extent_size_get(extent))) {
memset(extent_addr_get(extent), 0,
extent_usize_get(extent));
}
}
/*
* Increment extent_grow_next, but take care to do so atomically and