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Move tsd link and in_hook after tcache.

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This can lead to better cache utilization down the common paths where we don't
touch the link.
This commit is contained in:
David Goldblatt 2018-06-21 13:02:49 -07:00 committed by David Goldblatt
parent 50820010fe
commit d1e11d48d4
4 changed files with 17 additions and 15 deletions
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9
include/jemalloc/internal/tcache_structs.h
View File

@ -6,6 +6,10 @@
#include "jemalloc/internal/cache_bin.h"
#include "jemalloc/internal/ticker.h"
/* Various uses of this struct need it to be a named type. */
typedef struct tsd_s tsd_t;
typedef ql_elm(tsd_t) tsd_link_t;
struct tcache_s {
/*
* To minimize our cache-footprint, we put the frequently accessed data
@ -29,6 +33,11 @@ struct tcache_s {
*/
/* Lets us track all the tcaches in an arena. */
ql_elm(tcache_t) link;
/* Logically scoped to tsd, but put here for cache layout reasons. */
ql_elm(tsd_t) tsd_link;
bool in_hook;
/*
* The descriptor lets the arena find our cache bins without seeing the
* tcache definition. This enables arenas to aggregate stats across

7
include/jemalloc/internal/tsd.h
View File

@ -59,14 +59,10 @@ typedef void (*test_callback_t)(int *);
# define MALLOC_TEST_TSD_INITIALIZER
#endif
/* Various uses of this struct need it to be a named type. */
typedef ql_elm(tsd_t) tsd_link_t;
/* O(name, type, nullable type */
#define MALLOC_TSD \
O(tcache_enabled, bool, bool) \
O(arenas_tdata_bypass, bool, bool) \
O(in_hook, bool, bool) \
O(reentrancy_level, int8_t, int8_t) \
O(narenas_tdata, uint32_t, uint32_t) \
O(offset_state, uint64_t, uint64_t) \
@ -77,7 +73,6 @@ typedef ql_elm(tsd_t) tsd_link_t;
O(iarena, arena_t *, arena_t *) \
O(arena, arena_t *, arena_t *) \
O(arenas_tdata, arena_tdata_t *, arena_tdata_t *)\
O(link, tsd_link_t, tsd_link_t) \
O(tcache, tcache_t, tcache_t) \
O(witness_tsd, witness_tsd_t, witness_tsdn_t) \
MALLOC_TEST_TSD
@ -86,7 +81,6 @@ typedef ql_elm(tsd_t) tsd_link_t;
ATOMIC_INIT(tsd_state_uninitialized), \
TCACHE_ENABLED_ZERO_INITIALIZER, \
false, \
false, \
0, \
0, \
0, \
@ -97,7 +91,6 @@ typedef ql_elm(tsd_t) tsd_link_t;
NULL, \
NULL, \
NULL, \
{NULL}, \
TCACHE_ZERO_INITIALIZER, \
WITNESS_TSD_INITIALIZER \
MALLOC_TEST_TSD_INITIALIZER \

6
src/hook.c
View File

@ -130,9 +130,9 @@ hook_reentrantp() {
*/
static bool in_hook_global = true;
tsdn_t *tsdn = tsdn_fetch();
bool *in_hook = tsdn_in_hookp_get(tsdn);
if (in_hook != NULL) {
return in_hook;
tcache_t *tcache = tsdn_tcachep_get(tsdn);
if (tcache != NULL) {
return &tcache->in_hook;
}
return &in_hook_global;
}

10
src/tsd.c
View File

@ -68,7 +68,7 @@ tsd_in_nominal_list(tsd_t *tsd) {
* out of it here.
*/
malloc_mutex_lock(TSDN_NULL, &tsd_nominal_tsds_lock);
ql_foreach(tsd_list, &tsd_nominal_tsds, TSD_MANGLE(link)) {
ql_foreach(tsd_list, &tsd_nominal_tsds, TSD_MANGLE(tcache).tsd_link) {
if (tsd == tsd_list) {
found = true;
break;
@ -82,9 +82,9 @@ static void
tsd_add_nominal(tsd_t *tsd) {
assert(!tsd_in_nominal_list(tsd));
assert(tsd_state_get(tsd) <= tsd_state_nominal_max);
ql_elm_new(tsd, TSD_MANGLE(link));
ql_elm_new(tsd, TSD_MANGLE(tcache).tsd_link);
malloc_mutex_lock(tsd_tsdn(tsd), &tsd_nominal_tsds_lock);
ql_tail_insert(&tsd_nominal_tsds, tsd, TSD_MANGLE(link));
ql_tail_insert(&tsd_nominal_tsds, tsd, TSD_MANGLE(tcache).tsd_link);
malloc_mutex_unlock(tsd_tsdn(tsd), &tsd_nominal_tsds_lock);
}
@ -93,7 +93,7 @@ tsd_remove_nominal(tsd_t *tsd) {
assert(tsd_in_nominal_list(tsd));
assert(tsd_state_get(tsd) <= tsd_state_nominal_max);
malloc_mutex_lock(tsd_tsdn(tsd), &tsd_nominal_tsds_lock);
ql_remove(&tsd_nominal_tsds, tsd, TSD_MANGLE(link));
ql_remove(&tsd_nominal_tsds, tsd, TSD_MANGLE(tcache).tsd_link);
malloc_mutex_unlock(tsd_tsdn(tsd), &tsd_nominal_tsds_lock);
}
@ -106,7 +106,7 @@ tsd_force_recompute(tsdn_t *tsdn) {
atomic_fence(ATOMIC_RELEASE);
malloc_mutex_lock(tsdn, &tsd_nominal_tsds_lock);
tsd_t *remote_tsd;
ql_foreach(remote_tsd, &tsd_nominal_tsds, TSD_MANGLE(link)) {
ql_foreach(remote_tsd, &tsd_nominal_tsds, TSD_MANGLE(tcache).tsd_link) {
assert(atomic_load_u8(&remote_tsd->state, ATOMIC_RELAXED)
<= tsd_state_nominal_max);
atomic_store_u8(&remote_tsd->state, tsd_state_nominal_recompute,