Lines Matching full:group
180 static void group_init(struct psi_group *group) in group_init() argument
184 group->enabled = true; in group_init()
186 seqcount_init(&per_cpu_ptr(group->pcpu, cpu)->seq); in group_init()
187 group->avg_last_update = sched_clock(); in group_init()
188 group->avg_next_update = group->avg_last_update + psi_period; in group_init()
189 INIT_DELAYED_WORK(&group->avgs_work, psi_avgs_work); in group_init()
190 mutex_init(&group->avgs_lock); in group_init()
192 mutex_init(&group->trigger_lock); in group_init()
193 INIT_LIST_HEAD(&group->triggers); in group_init()
194 group->poll_min_period = U32_MAX; in group_init()
195 group->polling_next_update = ULLONG_MAX; in group_init()
196 init_waitqueue_head(&group->poll_wait); in group_init()
197 timer_setup(&group->poll_timer, poll_timer_fn, 0); in group_init()
198 rcu_assign_pointer(group->poll_task, NULL); in group_init()
240 static void get_recent_times(struct psi_group *group, int cpu, in get_recent_times() argument
244 struct psi_group_cpu *groupc = per_cpu_ptr(group->pcpu, cpu); in get_recent_times()
305 static void collect_percpu_times(struct psi_group *group, in collect_percpu_times() argument
328 get_recent_times(group, cpu, aggregator, times, in collect_percpu_times()
353 group->total[aggregator][s] += in collect_percpu_times()
360 static u64 update_averages(struct psi_group *group, u64 now) in update_averages() argument
368 expires = group->avg_next_update; in update_averages()
380 period = now - (group->avg_last_update + (missed_periods * psi_period)); in update_averages()
381 group->avg_last_update = now; in update_averages()
386 sample = group->total[PSI_AVGS][s] - group->avg_total[s]; in update_averages()
406 group->avg_total[s] += sample; in update_averages()
407 calc_avgs(group->avg[s], missed_periods, sample, period); in update_averages()
416 struct psi_group *group; in psi_avgs_work() local
422 group = container_of(dwork, struct psi_group, avgs_work); in psi_avgs_work()
424 mutex_lock(&group->avgs_lock); in psi_avgs_work()
428 collect_percpu_times(group, PSI_AVGS, &changed_states); in psi_avgs_work()
437 if (now >= group->avg_next_update) in psi_avgs_work()
438 group->avg_next_update = update_averages(group, now); in psi_avgs_work()
442 group->avg_next_update - now) + 1); in psi_avgs_work()
445 mutex_unlock(&group->avgs_lock); in psi_avgs_work()
494 static void init_triggers(struct psi_group *group, u64 now) in init_triggers() argument
498 list_for_each_entry(t, &group->triggers, node) in init_triggers()
500 group->total[PSI_POLL][t->state], 0); in init_triggers()
501 memcpy(group->polling_total, group->total[PSI_POLL], in init_triggers()
502 sizeof(group->polling_total)); in init_triggers()
503 group->polling_next_update = now + group->poll_min_period; in init_triggers()
506 static u64 update_triggers(struct psi_group *group, u64 now) in update_triggers() argument
510 u64 *total = group->total[PSI_POLL]; in update_triggers()
516 list_for_each_entry(t, &group->triggers, node) { in update_triggers()
520 new_stall = group->polling_total[t->state] != total[t->state]; in update_triggers()
534 * remember to update group->polling_total[] once we've in update_triggers()
560 memcpy(group->polling_total, total, in update_triggers()
561 sizeof(group->polling_total)); in update_triggers()
563 return now + group->poll_min_period; in update_triggers()
567 static void psi_schedule_poll_work(struct psi_group *group, unsigned long delay) in psi_schedule_poll_work() argument
574 * mod_timer below can be tolerated because group->polling_next_update in psi_schedule_poll_work()
577 if (timer_pending(&group->poll_timer)) in psi_schedule_poll_work()
582 task = rcu_dereference(group->poll_task); in psi_schedule_poll_work()
588 mod_timer(&group->poll_timer, jiffies + delay); in psi_schedule_poll_work()
593 static void psi_poll_work(struct psi_group *group) in psi_poll_work() argument
598 mutex_lock(&group->trigger_lock); in psi_poll_work()
602 collect_percpu_times(group, PSI_POLL, &changed_states); in psi_poll_work()
604 if (changed_states & group->poll_states) { in psi_poll_work()
606 if (now > group->polling_until) in psi_poll_work()
607 init_triggers(group, now); in psi_poll_work()
614 group->polling_until = now + in psi_poll_work()
615 group->poll_min_period * UPDATES_PER_WINDOW; in psi_poll_work()
618 if (now > group->polling_until) { in psi_poll_work()
619 group->polling_next_update = ULLONG_MAX; in psi_poll_work()
623 if (now >= group->polling_next_update) in psi_poll_work()
624 group->polling_next_update = update_triggers(group, now); in psi_poll_work()
626 psi_schedule_poll_work(group, in psi_poll_work()
627 nsecs_to_jiffies(group->polling_next_update - now) + 1); in psi_poll_work()
630 mutex_unlock(&group->trigger_lock); in psi_poll_work()
635 struct psi_group *group = (struct psi_group *)data; in psi_poll_worker() local
640 wait_event_interruptible(group->poll_wait, in psi_poll_worker()
641 atomic_cmpxchg(&group->poll_wakeup, 1, 0) || in psi_poll_worker()
646 psi_poll_work(group); in psi_poll_worker()
653 struct psi_group *group = from_timer(group, t, poll_timer); in poll_timer_fn() local
655 atomic_set(&group->poll_wakeup, 1); in poll_timer_fn()
656 wake_up_interruptible(&group->poll_wait); in poll_timer_fn()
688 static void psi_group_change(struct psi_group *group, int cpu, in psi_group_change() argument
697 groupc = per_cpu_ptr(group->pcpu, cpu); in psi_group_change()
748 if (!group->enabled) { in psi_group_change()
750 * On the first group change after disabling PSI, conclude in psi_group_change()
787 if (state_mask & group->poll_states) in psi_group_change()
788 psi_schedule_poll_work(group, 1); in psi_group_change()
790 if (wake_clock && !delayed_work_pending(&group->avgs_work)) in psi_group_change()
791 schedule_delayed_work(&group->avgs_work, PSI_FREQ); in psi_group_change()
821 struct psi_group *group; in psi_task_change() local
831 group = task_psi_group(task); in psi_task_change()
833 psi_group_change(group, cpu, clear, set, now, true); in psi_task_change()
834 } while ((group = group->parent)); in psi_task_change()
840 struct psi_group *group, *common = NULL; in psi_task_switch() local
851 group = task_psi_group(next); in psi_task_switch()
853 if (per_cpu_ptr(group->pcpu, cpu)->state_mask & in psi_task_switch()
855 common = group; in psi_task_switch()
859 psi_group_change(group, cpu, 0, TSK_ONCPU, now, true); in psi_task_switch()
860 } while ((group = group->parent)); in psi_task_switch()
893 group = task_psi_group(prev); in psi_task_switch()
895 if (group == common) in psi_task_switch()
897 psi_group_change(group, cpu, clear, set, now, wake_clock); in psi_task_switch()
898 } while ((group = group->parent)); in psi_task_switch()
908 for (; group; group = group->parent) in psi_task_switch()
909 psi_group_change(group, cpu, clear, set, now, wake_clock); in psi_task_switch()
918 struct psi_group *group; in psi_account_irqtime() local
927 group = task_psi_group(task); in psi_account_irqtime()
929 if (!group->enabled) in psi_account_irqtime()
932 groupc = per_cpu_ptr(group->pcpu, cpu); in psi_account_irqtime()
941 if (group->poll_states & (1 << PSI_IRQ_FULL)) in psi_account_irqtime()
942 psi_schedule_poll_work(group, 1); in psi_account_irqtime()
943 } while ((group = group->parent)); in psi_account_irqtime()
1108 void psi_cgroup_restart(struct psi_group *group) in psi_cgroup_restart() argument
1127 if (!group->enabled) in psi_cgroup_restart()
1137 psi_group_change(group, cpu, 0, 0, now, true); in psi_cgroup_restart()
1143 int psi_show(struct seq_file *m, struct psi_group *group, enum psi_res res) in psi_show() argument
1153 mutex_lock(&group->avgs_lock); in psi_show()
1155 collect_percpu_times(group, PSI_AVGS, NULL); in psi_show()
1156 if (now >= group->avg_next_update) in psi_show()
1157 group->avg_next_update = update_averages(group, now); in psi_show()
1158 mutex_unlock(&group->avgs_lock); in psi_show()
1170 if (!(group == &psi_system && res == PSI_CPU && full)) { in psi_show()
1172 avg[w] = group->avg[res * 2 + full][w]; in psi_show()
1173 total = div_u64(group->total[PSI_AVGS][res * 2 + full], in psi_show()
1188 struct psi_trigger *psi_trigger_create(struct psi_group *group, in psi_trigger_create() argument
1226 t->group = group; in psi_trigger_create()
1231 group->total[PSI_POLL][t->state], 0); in psi_trigger_create()
1238 mutex_lock(&group->trigger_lock); in psi_trigger_create()
1240 if (!rcu_access_pointer(group->poll_task)) { in psi_trigger_create()
1243 task = kthread_create(psi_poll_worker, group, "psimon"); in psi_trigger_create()
1246 mutex_unlock(&group->trigger_lock); in psi_trigger_create()
1249 atomic_set(&group->poll_wakeup, 0); in psi_trigger_create()
1251 rcu_assign_pointer(group->poll_task, task); in psi_trigger_create()
1254 list_add(&t->node, &group->triggers); in psi_trigger_create()
1255 group->poll_min_period = min(group->poll_min_period, in psi_trigger_create()
1257 group->nr_triggers[t->state]++; in psi_trigger_create()
1258 group->poll_states |= (1 << t->state); in psi_trigger_create()
1260 mutex_unlock(&group->trigger_lock); in psi_trigger_create()
1267 struct psi_group *group; in psi_trigger_destroy() local
1277 group = t->group; in psi_trigger_destroy()
1284 mutex_lock(&group->trigger_lock); in psi_trigger_destroy()
1291 group->nr_triggers[t->state]--; in psi_trigger_destroy()
1292 if (!group->nr_triggers[t->state]) in psi_trigger_destroy()
1293 group->poll_states &= ~(1 << t->state); in psi_trigger_destroy()
1295 list_for_each_entry(tmp, &group->triggers, node) in psi_trigger_destroy()
1298 group->poll_min_period = period; in psi_trigger_destroy()
1300 if (group->poll_states == 0) { in psi_trigger_destroy()
1301 group->polling_until = 0; in psi_trigger_destroy()
1303 group->poll_task, in psi_trigger_destroy()
1304 lockdep_is_held(&group->trigger_lock)); in psi_trigger_destroy()
1305 rcu_assign_pointer(group->poll_task, NULL); in psi_trigger_destroy()
1306 del_timer(&group->poll_timer); in psi_trigger_destroy()
1310 mutex_unlock(&group->trigger_lock); in psi_trigger_destroy()
1325 * can no longer be found through group->poll_task. in psi_trigger_destroy()