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Add max_per_bg_thd stats for per background thread mutexes.

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Added a new stats row to aggregate the maximum value of mutex counters for each
background threads.  Given that the per bg thd mutex is not expected to be
contended, this counter is mainly for sanity check / debugging.
This commit is contained in:
zhxchen17 2019-08-14 16:10:09 -07:00 • committed by Qi Wang
parent 4b76c684bb
commit b7c7df24ba
5 changed files with 55 additions and 11 deletions
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8
src/background_thread.c
View file

@ -794,9 +794,11 @@ background_thread_stats_read(tsdn_t *tsdn, background_thread_stats_t *stats) {
return true;
}
stats->num_threads = n_background_threads;
uint64_t num_runs = 0;
nstime_init(&stats->run_interval, 0);
memset(&stats->max_counter_per_bg_thd, 0, sizeof(mutex_prof_data_t));
uint64_t num_runs = 0;
stats->num_threads = n_background_threads;
for (unsigned i = 0; i < max_background_threads; i++) {
background_thread_info_t *info = &background_thread_info[i];
if (malloc_mutex_trylock(tsdn, &info->mtx)) {
@ -809,6 +811,8 @@ background_thread_stats_read(tsdn_t *tsdn, background_thread_stats_t *stats) {
if (info->state != background_thread_stopped) {
num_runs += info->tot_n_runs;
nstime_add(&stats->run_interval, &info->tot_sleep_time);
malloc_mutex_prof_max_update(tsdn,
&stats->max_counter_per_bg_thd, &info->mtx);
}
malloc_mutex_unlock(tsdn, &info->mtx);
}

3
src/ctl.c
View file

@ -1042,6 +1042,9 @@ ctl_background_thread_stats_read(tsdn_t *tsdn) {
memset(stats, 0, sizeof(background_thread_stats_t));
nstime_init(&stats->run_interval, 0);
}
malloc_mutex_prof_copy(
&ctl_stats->mutex_prof_data[global_prof_mutex_max_per_bg_thd],
&stats->max_counter_per_bg_thd);
}
static void