Move tsd link and in_hook after tcache.
This can lead to better cache utilization down the common paths where we don't touch the link.
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@ -6,6 +6,10 @@
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#include "jemalloc/internal/cache_bin.h"
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#include "jemalloc/internal/ticker.h"
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/* Various uses of this struct need it to be a named type. */
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typedef struct tsd_s tsd_t;
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typedef ql_elm(tsd_t) tsd_link_t;
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struct tcache_s {
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/*
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* To minimize our cache-footprint, we put the frequently accessed data
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@ -29,6 +33,11 @@ struct tcache_s {
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*/
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/* Lets us track all the tcaches in an arena. */
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ql_elm(tcache_t) link;
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/* Logically scoped to tsd, but put here for cache layout reasons. */
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ql_elm(tsd_t) tsd_link;
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bool in_hook;
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/*
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* The descriptor lets the arena find our cache bins without seeing the
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* tcache definition. This enables arenas to aggregate stats across
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@ -59,14 +59,10 @@ typedef void (*test_callback_t)(int *);
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# define MALLOC_TEST_TSD_INITIALIZER
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#endif
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/* Various uses of this struct need it to be a named type. */
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typedef ql_elm(tsd_t) tsd_link_t;
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/* O(name, type, nullable type */
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#define MALLOC_TSD \
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O(tcache_enabled, bool, bool) \
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O(arenas_tdata_bypass, bool, bool) \
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O(in_hook, bool, bool) \
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O(reentrancy_level, int8_t, int8_t) \
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O(narenas_tdata, uint32_t, uint32_t) \
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O(offset_state, uint64_t, uint64_t) \
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@ -77,7 +73,6 @@ typedef ql_elm(tsd_t) tsd_link_t;
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O(iarena, arena_t *, arena_t *) \
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O(arena, arena_t *, arena_t *) \
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O(arenas_tdata, arena_tdata_t *, arena_tdata_t *)\
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O(link, tsd_link_t, tsd_link_t) \
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O(tcache, tcache_t, tcache_t) \
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O(witness_tsd, witness_tsd_t, witness_tsdn_t) \
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MALLOC_TEST_TSD
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@ -86,7 +81,6 @@ typedef ql_elm(tsd_t) tsd_link_t;
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ATOMIC_INIT(tsd_state_uninitialized), \
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TCACHE_ENABLED_ZERO_INITIALIZER, \
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false, \
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false, \
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0, \
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0, \
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0, \
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@ -97,7 +91,6 @@ typedef ql_elm(tsd_t) tsd_link_t;
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NULL, \
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NULL, \
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NULL, \
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{NULL}, \
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TCACHE_ZERO_INITIALIZER, \
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WITNESS_TSD_INITIALIZER \
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MALLOC_TEST_TSD_INITIALIZER \
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@ -130,9 +130,9 @@ hook_reentrantp() {
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*/
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static bool in_hook_global = true;
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tsdn_t *tsdn = tsdn_fetch();
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bool *in_hook = tsdn_in_hookp_get(tsdn);
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if (in_hook != NULL) {
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return in_hook;
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tcache_t *tcache = tsdn_tcachep_get(tsdn);
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if (tcache != NULL) {
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return &tcache->in_hook;
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}
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return &in_hook_global;
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}
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10
src/tsd.c
10
src/tsd.c
@ -68,7 +68,7 @@ tsd_in_nominal_list(tsd_t *tsd) {
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* out of it here.
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*/
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malloc_mutex_lock(TSDN_NULL, &tsd_nominal_tsds_lock);
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ql_foreach(tsd_list, &tsd_nominal_tsds, TSD_MANGLE(link)) {
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ql_foreach(tsd_list, &tsd_nominal_tsds, TSD_MANGLE(tcache).tsd_link) {
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if (tsd == tsd_list) {
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found = true;
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break;
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@ -82,9 +82,9 @@ static void
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tsd_add_nominal(tsd_t *tsd) {
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assert(!tsd_in_nominal_list(tsd));
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assert(tsd_state_get(tsd) <= tsd_state_nominal_max);
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ql_elm_new(tsd, TSD_MANGLE(link));
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ql_elm_new(tsd, TSD_MANGLE(tcache).tsd_link);
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malloc_mutex_lock(tsd_tsdn(tsd), &tsd_nominal_tsds_lock);
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ql_tail_insert(&tsd_nominal_tsds, tsd, TSD_MANGLE(link));
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ql_tail_insert(&tsd_nominal_tsds, tsd, TSD_MANGLE(tcache).tsd_link);
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malloc_mutex_unlock(tsd_tsdn(tsd), &tsd_nominal_tsds_lock);
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}
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@ -93,7 +93,7 @@ tsd_remove_nominal(tsd_t *tsd) {
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assert(tsd_in_nominal_list(tsd));
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assert(tsd_state_get(tsd) <= tsd_state_nominal_max);
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malloc_mutex_lock(tsd_tsdn(tsd), &tsd_nominal_tsds_lock);
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ql_remove(&tsd_nominal_tsds, tsd, TSD_MANGLE(link));
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ql_remove(&tsd_nominal_tsds, tsd, TSD_MANGLE(tcache).tsd_link);
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malloc_mutex_unlock(tsd_tsdn(tsd), &tsd_nominal_tsds_lock);
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}
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@ -106,7 +106,7 @@ tsd_force_recompute(tsdn_t *tsdn) {
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atomic_fence(ATOMIC_RELEASE);
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malloc_mutex_lock(tsdn, &tsd_nominal_tsds_lock);
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tsd_t *remote_tsd;
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ql_foreach(remote_tsd, &tsd_nominal_tsds, TSD_MANGLE(link)) {
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ql_foreach(remote_tsd, &tsd_nominal_tsds, TSD_MANGLE(tcache).tsd_link) {
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assert(atomic_load_u8(&remote_tsd->state, ATOMIC_RELAXED)
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<= tsd_state_nominal_max);
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atomic_store_u8(&remote_tsd->state, tsd_state_nominal_recompute,
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