project-base/server-skynet-source-3rd-jemalloc
2
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

move bytes until sample to tsd. Fastpath allocation does not need

Browse Source 
to load tdata now, avoiding several branches.
This commit is contained in:
Dave Watson
2018-10-09 10:59:02 -07:00
parent 09adf18f1a
commit 9ed3bdc848
4 changed files with 13 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
src/prof.c
View File

@@ -1136,15 +1136,12 @@ prof_lookup(tsd_t *tsd, prof_bt_t *bt) {
void
prof_sample_threshold_update(prof_tdata_t *tdata) {
#ifdef JEMALLOC_PROF
uint64_t r;
double u;
if (!config_prof) {
return;
}
if (lg_prof_sample == 0) {
tdata->bytes_until_sample = 0;
tsd_bytes_until_sample_set(tsd_fetch(), 0);
return;
}
@@ -1166,11 +1163,13 @@ prof_sample_threshold_update(prof_tdata_t *tdata) {
* pp 500
* (http://luc.devroye.org/rnbookindex.html)
*/
r = prng_lg_range_u64(&tdata->prng_state, 53);
u = (double)r * (1.0/9007199254740992.0L);
tdata->bytes_until_sample = (uint64_t)(log(u) /
uint64_t r = prng_lg_range_u64(&tdata->prng_state, 53);
double u = (double)r * (1.0/9007199254740992.0L);
uint64_t bytes_until_sample = (uint64_t)(log(u) /
log(1.0 - (1.0 / (double)((uint64_t)1U << lg_prof_sample))))
+ (uint64_t)1U;
tsd_bytes_until_sample_set(tsd_fetch(), bytes_until_sample);
#endif
}