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background_thread: add max thread count config

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Looking at the thread counts in our services, jemalloc's background thread
is useful, but mostly idle.  Add a config option to tune down the number of threads.
This commit is contained in:
Dave Watson 2018-03-29 12:58:13 -07:00
parent 4be74d5112
commit 8b14f3abc0
7 changed files with 177 additions and 22 deletions
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2
include/jemalloc/internal/background_thread_externs.h
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@ -2,9 +2,11 @@
#define JEMALLOC_INTERNAL_BACKGROUND_THREAD_EXTERNS_H
extern bool opt_background_thread;
extern size_t opt_max_background_threads;
extern malloc_mutex_t background_thread_lock;
extern atomic_b_t background_thread_enabled_state;
extern size_t n_background_threads;
extern size_t max_background_threads;
extern background_thread_info_t *background_thread_info;
extern bool can_enable_background_thread;

1
include/jemalloc/internal/background_thread_structs.h
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@ -8,6 +8,7 @@
#endif
#define BACKGROUND_THREAD_INDEFINITE_SLEEP UINT64_MAX
#define MAX_BACKGROUND_THREAD_LIMIT MALLOCX_ARENA_LIMIT
typedef enum {
background_thread_stopped,