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https://github.com/jemalloc/jemalloc.git
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22741cfd8c
Currently there are deferral-relevant constants in arena.c and background_thread.c. This commit moves them out into corresponding PAC and HPA headers. Those commonly needed by both are put into a new header deferral.h where the contract of deferral are clearly stated.
86 lines
3.1 KiB
C
86 lines
3.1 KiB
C
#ifndef JEMALLOC_INTERNAL_BACKGROUND_THREAD_H
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#define JEMALLOC_INTERNAL_BACKGROUND_THREAD_H
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#include "jemalloc/internal/jemalloc_preamble.h"
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#include "jemalloc/internal/base.h"
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#include "jemalloc/internal/mutex.h"
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#if defined(JEMALLOC_BACKGROUND_THREAD) || defined(JEMALLOC_LAZY_LOCK)
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# define JEMALLOC_PTHREAD_CREATE_WRAPPER
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#endif
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#define BACKGROUND_THREAD_INDEFINITE_SLEEP UINT64_MAX
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#define MAX_BACKGROUND_THREAD_LIMIT MALLOCX_ARENA_LIMIT
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#define DEFAULT_NUM_BACKGROUND_THREAD 4
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typedef enum {
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background_thread_stopped,
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background_thread_started,
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/* Thread waits on the global lock when paused (for arena_reset). */
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background_thread_paused,
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} background_thread_state_t;
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struct background_thread_info_s {
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#ifdef JEMALLOC_BACKGROUND_THREAD
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/* Background thread is pthread specific. */
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pthread_t thread;
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pthread_cond_t cond;
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#endif
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malloc_mutex_t mtx;
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background_thread_state_t state;
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/* When true, it means no wakeup scheduled. */
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atomic_b_t indefinite_sleep;
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/* Next scheduled wakeup time (absolute time in ns). */
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nstime_t next_wakeup;
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/*
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* Since the last background thread run, newly added number of pages
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* that need to be purged by the next wakeup. This is adjusted on
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* epoch advance, and is used to determine whether we should signal the
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* background thread to wake up earlier.
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*/
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size_t npages_to_purge_new;
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/* Stats: total number of runs since started. */
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uint64_t tot_n_runs;
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/* Stats: total sleep time since started. */
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nstime_t tot_sleep_time;
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};
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typedef struct background_thread_info_s background_thread_info_t;
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struct background_thread_stats_s {
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size_t num_threads;
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uint64_t num_runs;
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nstime_t run_interval;
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mutex_prof_data_t max_counter_per_bg_thd;
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};
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typedef struct background_thread_stats_s background_thread_stats_t;
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extern bool opt_background_thread;
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extern size_t opt_max_background_threads;
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extern malloc_mutex_t background_thread_lock;
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extern atomic_b_t background_thread_enabled_state;
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extern size_t n_background_threads;
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extern size_t max_background_threads;
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extern background_thread_info_t *background_thread_info;
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bool background_thread_create(tsd_t *tsd, unsigned arena_ind);
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bool background_threads_enable(tsd_t *tsd);
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bool background_threads_disable(tsd_t *tsd);
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bool background_thread_is_started(background_thread_info_t *info);
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void background_thread_wakeup_early(
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background_thread_info_t *info, nstime_t *remaining_sleep);
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void background_thread_prefork0(tsdn_t *tsdn);
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void background_thread_prefork1(tsdn_t *tsdn);
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void background_thread_postfork_parent(tsdn_t *tsdn);
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void background_thread_postfork_child(tsdn_t *tsdn);
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bool background_thread_stats_read(
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tsdn_t *tsdn, background_thread_stats_t *stats);
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void background_thread_ctl_init(tsdn_t *tsdn);
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#ifdef JEMALLOC_PTHREAD_CREATE_WRAPPER
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extern int pthread_create_wrapper(pthread_t *__restrict, const pthread_attr_t *,
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void *(*)(void *), void *__restrict);
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#endif
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bool background_thread_boot0(void);
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bool background_thread_boot1(tsdn_t *tsdn, base_t *base);
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#endif /* JEMALLOC_INTERNAL_BACKGROUND_THREAD_H */
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