Lines Matching full:group
188 static void group_init(struct psi_group *group) in group_init() argument
193 seqcount_init(&per_cpu_ptr(group->pcpu, cpu)->seq); in group_init()
194 group->avg_last_update = sched_clock(); in group_init()
195 group->avg_next_update = group->avg_last_update + psi_period; in group_init()
196 INIT_DELAYED_WORK(&group->avgs_work, psi_avgs_work); in group_init()
197 mutex_init(&group->avgs_lock); in group_init()
199 mutex_init(&group->trigger_lock); in group_init()
200 INIT_LIST_HEAD(&group->triggers); in group_init()
201 memset(group->nr_triggers, 0, sizeof(group->nr_triggers)); in group_init()
202 group->poll_states = 0; in group_init()
203 group->poll_min_period = U32_MAX; in group_init()
204 memset(group->polling_total, 0, sizeof(group->polling_total)); in group_init()
205 group->polling_next_update = ULLONG_MAX; in group_init()
206 group->polling_until = 0; in group_init()
207 init_waitqueue_head(&group->poll_wait); in group_init()
208 timer_setup(&group->poll_timer, poll_timer_fn, 0); in group_init()
209 rcu_assign_pointer(group->poll_task, NULL); in group_init()
249 static void get_recent_times(struct psi_group *group, int cpu, in get_recent_times() argument
253 struct psi_group_cpu *groupc = per_cpu_ptr(group->pcpu, cpu); in get_recent_times()
314 static void collect_percpu_times(struct psi_group *group, in collect_percpu_times() argument
337 get_recent_times(group, cpu, aggregator, times, in collect_percpu_times()
362 group->total[aggregator][s] += in collect_percpu_times()
369 static u64 update_averages(struct psi_group *group, u64 now) in update_averages() argument
377 expires = group->avg_next_update; in update_averages()
389 period = now - (group->avg_last_update + (missed_periods * psi_period)); in update_averages()
390 group->avg_last_update = now; in update_averages()
395 sample = group->total[PSI_AVGS][s] - group->avg_total[s]; in update_averages()
415 group->avg_total[s] += sample; in update_averages()
416 calc_avgs(group->avg[s], missed_periods, sample, period); in update_averages()
425 struct psi_group *group; in psi_avgs_work() local
431 group = container_of(dwork, struct psi_group, avgs_work); in psi_avgs_work()
433 mutex_lock(&group->avgs_lock); in psi_avgs_work()
437 collect_percpu_times(group, PSI_AVGS, &changed_states); in psi_avgs_work()
446 if (now >= group->avg_next_update) in psi_avgs_work()
447 group->avg_next_update = update_averages(group, now); in psi_avgs_work()
451 group->avg_next_update - now) + 1); in psi_avgs_work()
454 mutex_unlock(&group->avgs_lock); in psi_avgs_work()
503 static void init_triggers(struct psi_group *group, u64 now) in init_triggers() argument
507 list_for_each_entry(t, &group->triggers, node) in init_triggers()
509 group->total[PSI_POLL][t->state], 0); in init_triggers()
510 memcpy(group->polling_total, group->total[PSI_POLL], in init_triggers()
511 sizeof(group->polling_total)); in init_triggers()
512 group->polling_next_update = now + group->poll_min_period; in init_triggers()
515 static u64 update_triggers(struct psi_group *group, u64 now) in update_triggers() argument
519 u64 *total = group->total[PSI_POLL]; in update_triggers()
525 list_for_each_entry(t, &group->triggers, node) { in update_triggers()
529 if (group->polling_total[t->state] == total[t->state]) in update_triggers()
534 * remember to update group->polling_total[] once we've in update_triggers()
556 memcpy(group->polling_total, total, in update_triggers()
557 sizeof(group->polling_total)); in update_triggers()
559 return now + group->poll_min_period; in update_triggers()
563 static void psi_schedule_poll_work(struct psi_group *group, unsigned long delay) in psi_schedule_poll_work() argument
570 * mod_timer below can be tolerated because group->polling_next_update in psi_schedule_poll_work()
573 if (timer_pending(&group->poll_timer)) in psi_schedule_poll_work()
578 task = rcu_dereference(group->poll_task); in psi_schedule_poll_work()
584 mod_timer(&group->poll_timer, jiffies + delay); in psi_schedule_poll_work()
589 static void psi_poll_work(struct psi_group *group) in psi_poll_work() argument
594 mutex_lock(&group->trigger_lock); in psi_poll_work()
598 collect_percpu_times(group, PSI_POLL, &changed_states); in psi_poll_work()
600 if (changed_states & group->poll_states) { in psi_poll_work()
602 if (now > group->polling_until) in psi_poll_work()
603 init_triggers(group, now); in psi_poll_work()
610 group->polling_until = now + in psi_poll_work()
611 group->poll_min_period * UPDATES_PER_WINDOW; in psi_poll_work()
614 if (now > group->polling_until) { in psi_poll_work()
615 group->polling_next_update = ULLONG_MAX; in psi_poll_work()
619 if (now >= group->polling_next_update) in psi_poll_work()
620 group->polling_next_update = update_triggers(group, now); in psi_poll_work()
622 psi_schedule_poll_work(group, in psi_poll_work()
623 nsecs_to_jiffies(group->polling_next_update - now) + 1); in psi_poll_work()
626 mutex_unlock(&group->trigger_lock); in psi_poll_work()
631 struct psi_group *group = (struct psi_group *)data; in psi_poll_worker() local
636 wait_event_interruptible(group->poll_wait, in psi_poll_worker()
637 atomic_cmpxchg(&group->poll_wakeup, 1, 0) || in psi_poll_worker()
642 psi_poll_work(group); in psi_poll_worker()
649 struct psi_group *group = from_timer(group, t, poll_timer); in poll_timer_fn() local
651 atomic_set(&group->poll_wakeup, 1); in poll_timer_fn()
652 wake_up_interruptible(&group->poll_wait); in poll_timer_fn()
684 static void psi_group_change(struct psi_group *group, int cpu, in psi_group_change() argument
693 groupc = per_cpu_ptr(group->pcpu, cpu); in psi_group_change()
746 if (state_mask & group->poll_states) in psi_group_change()
747 psi_schedule_poll_work(group, 1); in psi_group_change()
749 if (wake_clock && !delayed_work_pending(&group->avgs_work)) in psi_group_change()
750 schedule_delayed_work(&group->avgs_work, PSI_FREQ); in psi_group_change()
795 struct psi_group *group; in psi_task_change() local
817 while ((group = iterate_groups(task, &iter))) in psi_task_change()
818 psi_group_change(group, cpu, clear, set, now, wake_clock); in psi_task_change()
824 struct psi_group *group, *common = NULL; in psi_task_switch() local
842 while ((group = iterate_groups(next, &iter))) { in psi_task_switch()
844 per_cpu_ptr(group->pcpu, cpu)->tasks[NR_ONCPU]) { in psi_task_switch()
845 common = group; in psi_task_switch()
849 psi_group_change(group, cpu, 0, TSK_ONCPU, now, true); in psi_task_switch()
870 while ((group = iterate_groups(prev, &iter)) && group != common) in psi_task_switch()
871 psi_group_change(group, cpu, clear, set, now, true); in psi_task_switch()
879 for (; group; group = iterate_groups(prev, &iter)) in psi_task_switch()
880 psi_group_change(group, cpu, clear, set, now, true); in psi_task_switch()
1037 int psi_show(struct seq_file *m, struct psi_group *group, enum psi_res res) in psi_show() argument
1046 mutex_lock(&group->avgs_lock); in psi_show()
1048 collect_percpu_times(group, PSI_AVGS, NULL); in psi_show()
1049 if (now >= group->avg_next_update) in psi_show()
1050 group->avg_next_update = update_averages(group, now); in psi_show()
1051 mutex_unlock(&group->avgs_lock); in psi_show()
1059 avg[w] = group->avg[res * 2 + full][w]; in psi_show()
1060 total = div_u64(group->total[PSI_AVGS][res * 2 + full], in psi_show()
1112 struct psi_trigger *psi_trigger_create(struct psi_group *group, in psi_trigger_create() argument
1145 t->group = group; in psi_trigger_create()
1156 mutex_lock(&group->trigger_lock); in psi_trigger_create()
1158 if (!rcu_access_pointer(group->poll_task)) { in psi_trigger_create()
1161 task = kthread_create(psi_poll_worker, group, "psimon"); in psi_trigger_create()
1164 mutex_unlock(&group->trigger_lock); in psi_trigger_create()
1167 atomic_set(&group->poll_wakeup, 0); in psi_trigger_create()
1169 rcu_assign_pointer(group->poll_task, task); in psi_trigger_create()
1172 list_add(&t->node, &group->triggers); in psi_trigger_create()
1173 group->poll_min_period = min(group->poll_min_period, in psi_trigger_create()
1175 group->nr_triggers[t->state]++; in psi_trigger_create()
1176 group->poll_states |= (1 << t->state); in psi_trigger_create()
1178 mutex_unlock(&group->trigger_lock); in psi_trigger_create()
1186 struct psi_group *group = t->group; in psi_trigger_destroy() local
1198 mutex_lock(&group->trigger_lock); in psi_trigger_destroy()
1205 group->nr_triggers[t->state]--; in psi_trigger_destroy()
1206 if (!group->nr_triggers[t->state]) in psi_trigger_destroy()
1207 group->poll_states &= ~(1 << t->state); in psi_trigger_destroy()
1209 list_for_each_entry(tmp, &group->triggers, node) in psi_trigger_destroy()
1212 group->poll_min_period = period; in psi_trigger_destroy()
1214 if (group->poll_states == 0) { in psi_trigger_destroy()
1215 group->polling_until = 0; in psi_trigger_destroy()
1217 group->poll_task, in psi_trigger_destroy()
1218 lockdep_is_held(&group->trigger_lock)); in psi_trigger_destroy()
1219 rcu_assign_pointer(group->poll_task, NULL); in psi_trigger_destroy()
1220 del_timer(&group->poll_timer); in psi_trigger_destroy()
1224 mutex_unlock(&group->trigger_lock); in psi_trigger_destroy()
1239 * can no longer be found through group->poll_task. in psi_trigger_destroy()