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Add zero option to arena batch allocation

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This commit is contained in:
Yinan Zhang 2020-07-22 17:01:44 -07:00
parent 49e5c2fe7d
commit f805468957
2 changed files with 8 additions and 2 deletions
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2
include/jemalloc/internal/arena_externs.h
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@ -88,7 +88,7 @@ arena_t *arena_choose_huge(tsd_t *tsd);
bin_t *arena_bin_choose(tsdn_t *tsdn, arena_t *arena, szind_t binind,
unsigned *binshard);
size_t arena_fill_small_fresh(tsdn_t *tsdn, arena_t *arena, szind_t binind,
void **ptrs, size_t nfill);
void **ptrs, size_t nfill, bool zero);
void arena_boot(sc_data_t *sc_data);
void arena_prefork0(tsdn_t *tsdn, arena_t *arena);
void arena_prefork1(tsdn_t *tsdn, arena_t *arena);

8
src/arena.c
View File

@ -885,11 +885,13 @@ label_refill:
size_t
arena_fill_small_fresh(tsdn_t *tsdn, arena_t *arena, szind_t binind,
void **ptrs, size_t nfill) {
void **ptrs, size_t nfill, bool zero) {
assert(binind < SC_NBINS);
const bin_info_t *bin_info = &bin_infos[binind];
const size_t nregs = bin_info->nregs;
assert(nregs > 0);
const size_t usize = bin_info->reg_size;
const bool manual_arena = !arena_is_auto(arena);
unsigned binshard;
bin_t *bin = arena_bin_choose(tsdn, arena, binind, &binshard);
@ -911,6 +913,10 @@ arena_fill_small_fresh(tsdn_t *tsdn, arena_t *arena, szind_t binind,
assert(batch > 0);
arena_slab_reg_alloc_batch(slab, bin_info, (unsigned)batch,
&ptrs[filled]);
assert(edata_addr_get(slab) == ptrs[filled]);
if (zero) {
memset(ptrs[filled], 0, batch * usize);
}
filled += batch;
if (batch == nregs) {
if (manual_arena) {