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Refactor and optimize prof sampling initialization.

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Makes the prof sample prng use the tsd prng_state.  This allows us to properly
initialize the sample interval event, without having to create tdata.  As a
result, tdata will be created on demand (when a thread reaches the sample
interval bytes allocated), instead of on the first allocation.
This commit is contained in:
Qi Wang 2019-11-04 17:22:25 -08:00 • committed by Qi Wang
parent bc774a3519
commit da50d8ce87
7 changed files with 16 additions and 59 deletions
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7
src/prof_data.c
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@ -1198,7 +1198,7 @@ prof_bt_keycomp(const void *k1, const void *k2) {
prof_tdata_t *
prof_tdata_init_impl(tsd_t *tsd, uint64_t thr_uid, uint64_t thr_discrim,
char *thread_name, bool active) {
char *thread_name, bool active, bool reset_interval) {
assert(tsd_reentrancy_level_get(tsd) == 0);
prof_tdata_t *tdata;
@ -1227,8 +1227,9 @@ prof_tdata_init_impl(tsd_t *tsd, uint64_t thr_uid, uint64_t thr_discrim,
return NULL;
}
tdata->prng_state = (uint64_t)(uintptr_t)tdata;
prof_sample_threshold_update(tdata);
if (reset_interval) {
prof_sample_threshold_update(tsd);
}
tdata->enq = false;
tdata->enq_idump = false;