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Last-N profiling mode

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This commit is contained in:
Yinan Zhang 2019-12-18 13:38:14 -08:00
parent 7a27a05940
commit 9a60cf54ec
26 changed files with 1218 additions and 44 deletions
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15
src/prof_data.c
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@ -378,6 +378,7 @@ prof_lookup(tsd_t *tsd, prof_bt_t *bt) {
ret.p->tdata = tdata;
ret.p->thr_uid = tdata->thr_uid;
ret.p->thr_discrim = tdata->thr_discrim;
ret.p->recent_count = 0;
memset(&ret.p->cnts, 0, sizeof(prof_cnt_t));
ret.p->gctx = gctx;
ret.p->tctx_uid = tdata->tctx_uid_next++;
@ -405,8 +406,15 @@ prof_lookup(tsd_t *tsd, prof_bt_t *bt) {
prof_tctx_t *
prof_tctx_create(tsd_t *tsd) {
prof_tdata_t *tdata = prof_tdata_get(tsd, false);
assert(tdata != NULL);
if (tsd_reentrancy_level_get(tsd) > 0) {
return NULL;
}
prof_tdata_t *tdata = prof_tdata_get(tsd, true);
if (tdata == NULL) {
return NULL;
}
prof_bt_t bt;
bt_init(&bt, tdata->vec);
prof_backtrace(tsd, &bt);
@ -1417,6 +1425,9 @@ prof_tctx_should_destroy(tsd_t *tsd, prof_tctx_t *tctx) {
if (tctx->prepared) {
return false;
}
if (tctx->recent_count != 0) {
return false;
}
return true;
}