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Build a general purpose thread event handler

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This commit is contained in:
Yinan Zhang
2019-09-03 15:04:48 -07:00
parent 6924f83cb2
commit 152c0ef954
13 changed files with 630 additions and 139 deletions
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21
src/prof.c
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@@ -5,6 +5,7 @@
#include "jemalloc/internal/ctl.h"
#include "jemalloc/internal/assert.h"
#include "jemalloc/internal/mutex.h"
#include "jemalloc/internal/thread_event.h"
/*
* This file implements the profiling "APIs" needed by other parts of jemalloc,
@@ -471,8 +472,11 @@ prof_sample_threshold_update(prof_tdata_t *tdata) {
return;
}
tsd_t *tsd = tsd_fetch();
if (lg_prof_sample == 0) {
tsd_bytes_until_sample_set(tsd_fetch(), 0);
thread_prof_sample_event_update(tsd,
THREAD_EVENT_MIN_START_WAIT);
return;
}
@@ -480,11 +484,11 @@ prof_sample_threshold_update(prof_tdata_t *tdata) {
* Compute sample interval as a geometrically distributed random
* variable with mean (2^lg_prof_sample).
*
* __ __
* | log(u) | 1
* tdata->bytes_until_sample = | -------- |, where p = ---------------
* | log(1-p) | lg_prof_sample
* 2
* __ __
* | log(u) | 1
* bytes_until_sample = | -------- |, where p = ---------------
* | log(1-p) | lg_prof_sample
* 2
*
* For more information on the math, see:
*
@@ -499,10 +503,7 @@ prof_sample_threshold_update(prof_tdata_t *tdata) {
uint64_t bytes_until_sample = (uint64_t)(log(u) /
log(1.0 - (1.0 / (double)((uint64_t)1U << lg_prof_sample))))
+ (uint64_t)1U;
if (bytes_until_sample > SSIZE_MAX) {
bytes_until_sample = SSIZE_MAX;
}
tsd_bytes_until_sample_set(tsd_fetch(), bytes_until_sample);
thread_prof_sample_event_update(tsd, bytes_until_sample);
#endif
}