diff options
Diffstat (limited to 'kernel/hrtimer.c')
| -rw-r--r-- | kernel/hrtimer.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c index 62aad8e1a38..476cb0c0b4a 100644 --- a/kernel/hrtimer.c +++ b/kernel/hrtimer.c @@ -585,6 +585,18 @@ static inline void hrtimer_init_timer_hres(struct hrtimer *timer) { } #endif /* CONFIG_HIGH_RES_TIMERS */ +#ifdef CONFIG_TIMER_STATS +void __timer_stats_hrtimer_set_start_info(struct hrtimer *timer, void *addr) +{ + if (timer->start_site) + return; + + timer->start_site = addr; + memcpy(timer->start_comm, current->comm, TASK_COMM_LEN); + timer->start_pid = current->pid; +} +#endif + /* * Counterpart to lock_timer_base above: */ @@ -743,6 +755,7 @@ remove_hrtimer(struct hrtimer *timer, struct hrtimer_clock_base *base) * reprogramming happens in the interrupt handler. This is a * rare case and less expensive than a smp call. */ + timer_stats_hrtimer_clear_start_info(timer); reprogram = base->cpu_base == &__get_cpu_var(hrtimer_bases); __remove_hrtimer(timer, base, HRTIMER_STATE_INACTIVE, reprogram); @@ -791,6 +804,8 @@ hrtimer_start(struct hrtimer *timer, ktime_t tim, const enum hrtimer_mode mode) } timer->expires = tim; + timer_stats_hrtimer_set_start_info(timer); + enqueue_hrtimer(timer, new_base, base == new_base); unlock_hrtimer_base(timer, &flags); @@ -925,6 +940,12 @@ void hrtimer_init(struct hrtimer *timer, clockid_t clock_id, timer->base = &cpu_base->clock_base[clock_id]; hrtimer_init_timer_hres(timer); + +#ifdef CONFIG_TIMER_STATS + timer->start_site = NULL; + timer->start_pid = -1; + memset(timer->start_comm, 0, TASK_COMM_LEN); +#endif } EXPORT_SYMBOL_GPL(hrtimer_init); @@ -1006,6 +1027,7 @@ void hrtimer_interrupt(struct clock_event_device *dev) __remove_hrtimer(timer, base, HRTIMER_STATE_CALLBACK, 0); + timer_stats_account_hrtimer(timer); /* * Note: We clear the CALLBACK bit after @@ -1050,6 +1072,8 @@ static void run_hrtimer_softirq(struct softirq_action *h) timer = list_entry(cpu_base->cb_pending.next, struct hrtimer, cb_entry); + timer_stats_account_hrtimer(timer); + fn = timer->function; __remove_hrtimer(timer, timer->base, HRTIMER_STATE_CALLBACK, 0); spin_unlock_irq(&cpu_base->lock); @@ -1106,6 +1130,8 @@ static inline void run_hrtimer_queue(struct hrtimer_cpu_base *cpu_base, if (base->softirq_time.tv64 <= timer->expires.tv64) break; + timer_stats_account_hrtimer(timer); + fn = timer->function; __remove_hrtimer(timer, base, HRTIMER_STATE_CALLBACK, 0); spin_unlock_irq(&cpu_base->lock); |