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Add sampling activation/deactivation control.

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Add the E/e options to control whether the application starts with
sampling active/inactive (secondary control to F/f).  Add the
prof.active mallctl so that the application can activate/deactivate
sampling on the fly.
This commit is contained in:
Jason Evans
2010-03-31 18:43:24 -07:00
parent a02fc08ec9
commit f18c982001
5 changed files with 68 additions and 1 deletions
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7
jemalloc/include/jemalloc/internal/prof.h
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@@ -119,6 +119,13 @@ struct prof_ctx_s {
#ifdef JEMALLOC_H_EXTERNS
extern bool opt_prof;
/*
* Even if opt_prof is true, sampling can be temporarily disabled by setting
* opt_prof_active to false. No locking is used when updating opt_prof_active,
* so there are no guarantees regarding how long it will take for all threads
* to notice state changes.
*/
extern bool opt_prof_active;
extern size_t opt_lg_prof_bt_max; /* Maximum backtrace depth. */
extern size_t opt_lg_prof_sample; /* Mean bytes between samples. */
extern ssize_t opt_lg_prof_interval; /* lg(prof_interval). */