c4063ce439
The setting has been tested in production for a while. No negative effect while we were able to reduce number of threads per process.
55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
#ifndef JEMALLOC_INTERNAL_BACKGROUND_THREAD_STRUCTS_H
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#define JEMALLOC_INTERNAL_BACKGROUND_THREAD_STRUCTS_H
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/* This file really combines "structs" and "types", but only transitionally. */
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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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};
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typedef struct background_thread_stats_s background_thread_stats_t;
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#endif /* JEMALLOC_INTERNAL_BACKGROUND_THREAD_STRUCTS_H */
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