250 lines
6.3 KiB
C
250 lines
6.3 KiB
C
#ifndef JEMALLOC_INTERNAL_TCACHE_INLINES_H
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#define JEMALLOC_INTERNAL_TCACHE_INLINES_H
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#include "jemalloc/internal/jemalloc_internal_types.h"
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#include "jemalloc/internal/size_classes.h"
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#include "jemalloc/internal/ticker.h"
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#include "jemalloc/internal/util.h"
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static inline bool
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tcache_enabled_get(tsd_t *tsd) {
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return tsd_tcache_enabled_get(tsd);
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}
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static inline void
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tcache_enabled_set(tsd_t *tsd, bool enabled) {
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bool was_enabled = tsd_tcache_enabled_get(tsd);
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if (!was_enabled && enabled) {
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tsd_tcache_data_init(tsd);
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} else if (was_enabled && !enabled) {
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tcache_cleanup(tsd);
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}
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/* Commit the state last. Above calls check current state. */
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tsd_tcache_enabled_set(tsd, enabled);
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tsd_slow_update(tsd);
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}
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JEMALLOC_ALWAYS_INLINE void
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tcache_event(tsd_t *tsd, tcache_t *tcache) {
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if (TCACHE_GC_INCR == 0) {
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return;
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}
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if (unlikely(ticker_tick(&tcache->gc_ticker))) {
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tcache_event_hard(tsd, tcache);
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}
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}
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JEMALLOC_ALWAYS_INLINE void *
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tcache_alloc_easy(tcache_bin_t *tbin, bool *tcache_success) {
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void *ret;
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if (unlikely(tbin->ncached == 0)) {
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tbin->low_water = -1;
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*tcache_success = false;
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return NULL;
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}
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/*
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* tcache_success (instead of ret) should be checked upon the return of
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* this function. We avoid checking (ret == NULL) because there is
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* never a null stored on the avail stack (which is unknown to the
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* compiler), and eagerly checking ret would cause pipeline stall
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* (waiting for the cacheline).
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*/
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*tcache_success = true;
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ret = *(tbin->avail - tbin->ncached);
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tbin->ncached--;
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if (unlikely((low_water_t)tbin->ncached < tbin->low_water)) {
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tbin->low_water = tbin->ncached;
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}
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return ret;
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}
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JEMALLOC_ALWAYS_INLINE void *
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tcache_alloc_small(tsd_t *tsd, arena_t *arena, tcache_t *tcache, size_t size,
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szind_t binind, bool zero, bool slow_path) {
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void *ret;
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tcache_bin_t *tbin;
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bool tcache_success;
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size_t usize JEMALLOC_CC_SILENCE_INIT(0);
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assert(binind < NBINS);
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tbin = tcache_small_bin_get(tcache, binind);
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ret = tcache_alloc_easy(tbin, &tcache_success);
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assert(tcache_success == (ret != NULL));
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if (unlikely(!tcache_success)) {
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bool tcache_hard_success;
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arena = arena_choose(tsd, arena);
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if (unlikely(arena == NULL)) {
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return NULL;
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}
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ret = tcache_alloc_small_hard(tsd_tsdn(tsd), arena, tcache,
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tbin, binind, &tcache_hard_success);
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if (tcache_hard_success == false) {
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return NULL;
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}
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}
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assert(ret);
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/*
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* Only compute usize if required. The checks in the following if
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* statement are all static.
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*/
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if (config_prof || (slow_path && config_fill) || unlikely(zero)) {
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usize = index2size(binind);
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assert(tcache_salloc(tsd_tsdn(tsd), ret) == usize);
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}
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if (likely(!zero)) {
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if (slow_path && config_fill) {
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if (unlikely(opt_junk_alloc)) {
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arena_alloc_junk_small(ret,
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&arena_bin_info[binind], false);
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} else if (unlikely(opt_zero)) {
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memset(ret, 0, usize);
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}
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}
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} else {
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if (slow_path && config_fill && unlikely(opt_junk_alloc)) {
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arena_alloc_junk_small(ret, &arena_bin_info[binind],
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true);
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}
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memset(ret, 0, usize);
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}
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if (config_stats) {
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tbin->tstats.nrequests++;
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}
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if (config_prof) {
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tcache->prof_accumbytes += usize;
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}
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tcache_event(tsd, tcache);
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return ret;
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}
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JEMALLOC_ALWAYS_INLINE void *
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tcache_alloc_large(tsd_t *tsd, arena_t *arena, tcache_t *tcache, size_t size,
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szind_t binind, bool zero, bool slow_path) {
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void *ret;
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tcache_bin_t *tbin;
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bool tcache_success;
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assert(binind >= NBINS &&binind < nhbins);
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tbin = tcache_large_bin_get(tcache, binind);
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ret = tcache_alloc_easy(tbin, &tcache_success);
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assert(tcache_success == (ret != NULL));
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if (unlikely(!tcache_success)) {
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/*
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* Only allocate one large object at a time, because it's quite
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* expensive to create one and not use it.
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*/
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arena = arena_choose(tsd, arena);
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if (unlikely(arena == NULL)) {
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return NULL;
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}
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ret = large_malloc(tsd_tsdn(tsd), arena, s2u(size), zero);
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if (ret == NULL) {
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return NULL;
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}
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} else {
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size_t usize JEMALLOC_CC_SILENCE_INIT(0);
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/* Only compute usize on demand */
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if (config_prof || (slow_path && config_fill) ||
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unlikely(zero)) {
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usize = index2size(binind);
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assert(usize <= tcache_maxclass);
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}
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if (likely(!zero)) {
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if (slow_path && config_fill) {
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if (unlikely(opt_junk_alloc)) {
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memset(ret, JEMALLOC_ALLOC_JUNK,
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usize);
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} else if (unlikely(opt_zero)) {
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memset(ret, 0, usize);
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}
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}
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} else {
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memset(ret, 0, usize);
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}
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if (config_stats) {
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tbin->tstats.nrequests++;
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}
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if (config_prof) {
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tcache->prof_accumbytes += usize;
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}
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}
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tcache_event(tsd, tcache);
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return ret;
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}
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JEMALLOC_ALWAYS_INLINE void
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tcache_dalloc_small(tsd_t *tsd, tcache_t *tcache, void *ptr, szind_t binind,
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bool slow_path) {
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tcache_bin_t *tbin;
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tcache_bin_info_t *tbin_info;
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assert(tcache_salloc(tsd_tsdn(tsd), ptr) <= SMALL_MAXCLASS);
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if (slow_path && config_fill && unlikely(opt_junk_free)) {
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arena_dalloc_junk_small(ptr, &arena_bin_info[binind]);
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}
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tbin = tcache_small_bin_get(tcache, binind);
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tbin_info = &tcache_bin_info[binind];
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if (unlikely(tbin->ncached == tbin_info->ncached_max)) {
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tcache_bin_flush_small(tsd, tcache, tbin, binind,
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(tbin_info->ncached_max >> 1));
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}
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assert(tbin->ncached < tbin_info->ncached_max);
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tbin->ncached++;
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*(tbin->avail - tbin->ncached) = ptr;
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tcache_event(tsd, tcache);
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}
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JEMALLOC_ALWAYS_INLINE void
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tcache_dalloc_large(tsd_t *tsd, tcache_t *tcache, void *ptr, szind_t binind,
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bool slow_path) {
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tcache_bin_t *tbin;
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tcache_bin_info_t *tbin_info;
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assert(tcache_salloc(tsd_tsdn(tsd), ptr) > SMALL_MAXCLASS);
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assert(tcache_salloc(tsd_tsdn(tsd), ptr) <= tcache_maxclass);
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if (slow_path && config_fill && unlikely(opt_junk_free)) {
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large_dalloc_junk(ptr, index2size(binind));
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}
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tbin = tcache_large_bin_get(tcache, binind);
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tbin_info = &tcache_bin_info[binind];
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if (unlikely(tbin->ncached == tbin_info->ncached_max)) {
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tcache_bin_flush_large(tsd, tbin, binind,
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(tbin_info->ncached_max >> 1), tcache);
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}
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assert(tbin->ncached < tbin_info->ncached_max);
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tbin->ncached++;
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*(tbin->avail - tbin->ncached) = ptr;
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tcache_event(tsd, tcache);
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}
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JEMALLOC_ALWAYS_INLINE tcache_t *
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tcaches_get(tsd_t *tsd, unsigned ind) {
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tcaches_t *elm = &tcaches[ind];
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if (unlikely(elm->tcache == NULL)) {
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elm->tcache = tcache_create_explicit(tsd);
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}
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return elm->tcache;
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}
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#endif /* JEMALLOC_INTERNAL_TCACHE_INLINES_H */
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