lihao/jemalloc
1
0
Fork 0
mirror of https://github.com/jemalloc/jemalloc.git synced 2026-07-23 13:13:06 +00:00
Code Issues Packages Projects Releases Wiki Activity

add experimental.arenas_create_ext mallctl

Browse Source 
This mallctl accepts an arena_config_t structure which
can be used to customize the behavior of the arena.
Right now it contains extent_hooks and a new option,
metadata_use_hooks, which controls whether the extent
hooks are also used for metadata allocation.

The medata_use_hooks option has two main use cases:

1. In heterogeneous memory systems, to avoid metadata
being placed on potentially slower memory.

2. Avoiding virtual memory from being leaked as a result
of metadata allocation failure originating in an extent hook.
This commit is contained in:
Piotr Balcer
2021-08-23 14:03:35 +02:00
committed by Qi Wang
parent a9031a0970
commit 7bb05e04be
17 changed files with 165 additions and 41 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
src/jemalloc.c
View File

@@ -384,7 +384,7 @@ narenas_total_get(void) {
/* Create a new arena and insert it into the arenas array at index ind. */
static arena_t *
arena_init_locked(tsdn_t *tsdn, unsigned ind, extent_hooks_t *extent_hooks) {
arena_init_locked(tsdn_t *tsdn, unsigned ind, const arena_config_t *config) {
arena_t *arena;
assert(ind <= narenas_total_get());
@@ -406,7 +406,7 @@ arena_init_locked(tsdn_t *tsdn, unsigned ind, extent_hooks_t *extent_hooks) {
}
/* Actually initialize the arena. */
arena = arena_new(tsdn, ind, extent_hooks);
arena = arena_new(tsdn, ind, config);
return arena;
}
@@ -430,11 +430,11 @@ arena_new_create_background_thread(tsdn_t *tsdn, unsigned ind) {
}
arena_t *
arena_init(tsdn_t *tsdn, unsigned ind, extent_hooks_t *extent_hooks) {
arena_init(tsdn_t *tsdn, unsigned ind, const arena_config_t *config) {
arena_t *arena;
malloc_mutex_lock(tsdn, &arenas_lock);
arena = arena_init_locked(tsdn, ind, extent_hooks);
arena = arena_init_locked(tsdn, ind, config);
malloc_mutex_unlock(tsdn, &arenas_lock);
arena_new_create_background_thread(tsdn, ind);
@@ -570,8 +570,7 @@ arena_choose_hard(tsd_t *tsd, bool internal) {
choose[j] = first_null;
arena = arena_init_locked(tsd_tsdn(tsd),
choose[j],
(extent_hooks_t *)
&ehooks_default_extent_hooks);
&arena_config_default);
if (arena == NULL) {
malloc_mutex_unlock(tsd_tsdn(tsd),
&arenas_lock);
@@ -1779,8 +1778,7 @@ malloc_init_hard_a0_locked() {
* Initialize one arena here. The rest are lazily created in
* arena_choose_hard().
*/
if (arena_init(TSDN_NULL, 0,
(extent_hooks_t *)&ehooks_default_extent_hooks) == NULL) {
if (arena_init(TSDN_NULL, 0, &arena_config_default) == NULL) {
return true;
}
a0 = arena_get(TSDN_NULL, 0, false);