diff options
Diffstat (limited to 'src/tsd.c')
| -rw-r--r-- | src/tsd.c | 18 |
1 files changed, 17 insertions, 1 deletions
@@ -300,9 +300,25 @@ tsd_fetch_slow(tsd_t *tsd, bool minimal) { tsd_state_set(tsd, tsd_state_minimal_initialized); tsd_set(tsd); tsd_data_init_nocleanup(tsd); + *tsd_min_init_state_nfetchedp_get(tsd) = 1; } } else if (tsd_state_get(tsd) == tsd_state_minimal_initialized) { - if (!minimal) { + /* + * If a thread only ever deallocates (e.g. dedicated reclamation + * threads), we want to help it to eventually escape the slow + * path (caused by the minimal initialized state). The nfetched + * counter tracks the number of times the tsd has been accessed + * under the min init state, and triggers the switch to nominal + * once reached the max allowed count. + * + * This means at most 128 deallocations stay on the slow path. + * + * Also see comments in free_default(). + */ + uint8_t *nfetched = tsd_min_init_state_nfetchedp_get(tsd); + assert(*nfetched >= 1); + (*nfetched)++; + if (!minimal || *nfetched == TSD_MIN_INIT_STATE_MAX_FETCHED) { /* Switch to fully initialized. */ tsd_state_set(tsd, tsd_state_nominal); assert(*tsd_reentrancy_levelp_get(tsd) >= 1); |