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Check for background thread inactivity on extents_dalloc.

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To avoid background threads sleeping forever with idle arenas, we eagerly check
background threads' sleep time after extents_dalloc, and signal the thread if
necessary.
This commit is contained in:
Qi Wang
2017-05-22 15:26:25 -07:00
committed by Qi Wang
parent 2c368284d2
commit 0eae838b0d
4 changed files with 91 additions and 23 deletions
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14
include/jemalloc/internal/background_thread_structs.h
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@@ -1,15 +1,22 @@
#ifndef JEMALLOC_INTERNAL_BACKGROUND_THREAD_STRUCTS_H
#define JEMALLOC_INTERNAL_BACKGROUND_THREAD_STRUCTS_H
/* This file really combines "structs" and "types", but only transitionally. */
#define BACKGROUND_THREAD_INDEFINITE_SLEEP UINT64_MAX
struct background_thread_info_s {
malloc_mutex_t mtx;
#ifdef JEMALLOC_BACKGROUND_THREAD
/* Background thread is pthread specific. */
pthread_cond_t cond;
pthread_t thread;
pthread_cond_t cond;
#endif
malloc_mutex_t mtx;
/* Whether the thread has been created. */
bool started;
/* Next scheduled wakeup time (absolute time). */
/* When true, it means no wakeup scheduled. */
atomic_b_t indefinite_sleep;
/* Next scheduled wakeup time (absolute time in ns). */
nstime_t next_wakeup;
/*
* Since the last background thread run, newly added number of pages
@@ -22,7 +29,6 @@ struct background_thread_info_s {
uint64_t tot_n_runs;
/* Stats: total sleep time since started. */
nstime_t tot_sleep_time;
#endif /* ifdef JEMALLOC_BACKGROUND_THREAD */
};
typedef struct background_thread_info_s background_thread_info_t;