diff options
| -rw-r--r-- | Documentation/hrtimer/timer_stats.txt | 4 | ||||
| -rw-r--r-- | include/linux/hrtimer.h | 5 | ||||
| -rw-r--r-- | include/linux/timer.h | 15 | ||||
| -rw-r--r-- | kernel/time/timer_stats.c | 14 | ||||
| -rw-r--r-- | kernel/timer.c | 14 |
5 files changed, 36 insertions, 16 deletions
diff --git a/Documentation/hrtimer/timer_stats.txt b/Documentation/hrtimer/timer_stats.txt index 22b0814d0ad..20d368c5981 100644 --- a/Documentation/hrtimer/timer_stats.txt +++ b/Documentation/hrtimer/timer_stats.txt @@ -67,3 +67,7 @@ executed on expiry. Thomas, Ingo +Added flag to indicate 'deferrable timer' in /proc/timer_stats. A deferrable +timer will appear as follows + 10D, 1 swapper queue_delayed_work_on (delayed_work_timer_fn) + diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h index 17c29dca835..540799bc85f 100644 --- a/include/linux/hrtimer.h +++ b/include/linux/hrtimer.h @@ -329,12 +329,13 @@ extern void sysrq_timer_list_show(void); #ifdef CONFIG_TIMER_STATS extern void timer_stats_update_stats(void *timer, pid_t pid, void *startf, - void *timerf, char * comm); + void *timerf, char *comm, + unsigned int timer_flag); static inline void timer_stats_account_hrtimer(struct hrtimer *timer) { timer_stats_update_stats(timer, timer->start_pid, timer->start_site, - timer->function, timer->start_comm); + timer->function, timer->start_comm, 0); } extern void __timer_stats_hrtimer_set_start_info(struct hrtimer *timer, diff --git a/include/linux/timer.h b/include/linux/timer.h index 2b59e6d4219..78cf899b440 100644 --- a/include/linux/timer.h +++ b/include/linux/timer.h @@ -90,16 +90,13 @@ extern unsigned long get_next_timer_interrupt(unsigned long now); */ #ifdef CONFIG_TIMER_STATS +#define TIMER_STATS_FLAG_DEFERRABLE 0x1 + extern void init_timer_stats(void); extern void timer_stats_update_stats(void *timer, pid_t pid, void *startf, - void *timerf, char * comm); - -static inline void timer_stats_account_timer(struct timer_list *timer) -{ - timer_stats_update_stats(timer, timer->start_pid, timer->start_site, - timer->function, timer->start_comm); -} + void *timerf, char *comm, + unsigned int timer_flag); extern void __timer_stats_timer_set_start_info(struct timer_list *timer, void *addr); @@ -118,10 +115,6 @@ static inline void init_timer_stats(void) { } -static inline void timer_stats_account_timer(struct timer_list *timer) -{ -} - static inline void timer_stats_timer_set_start_info(struct timer_list *timer) { } diff --git a/kernel/time/timer_stats.c b/kernel/time/timer_stats.c index 321693724ad..9b8a826236d 100644 --- a/kernel/time/timer_stats.c +++ b/kernel/time/timer_stats.c @@ -68,6 +68,7 @@ struct entry { * Number of timeout events: */ unsigned long count; + unsigned int timer_flag; /* * We save the command-line string to preserve @@ -231,7 +232,8 @@ static struct entry *tstat_lookup(struct entry *entry, char *comm) * incremented. Otherwise the timer is registered in a free slot. */ void timer_stats_update_stats(void *timer, pid_t pid, void *startf, - void *timerf, char * comm) + void *timerf, char *comm, + unsigned int timer_flag) { /* * It doesnt matter which lock we take: @@ -249,6 +251,7 @@ void timer_stats_update_stats(void *timer, pid_t pid, void *startf, input.start_func = startf; input.expire_func = timerf; input.pid = pid; + input.timer_flag = timer_flag; spin_lock_irqsave(lock, flags); if (!active) @@ -295,7 +298,7 @@ static int tstats_show(struct seq_file *m, void *v) period = ktime_to_timespec(time); ms = period.tv_nsec / 1000000; - seq_puts(m, "Timer Stats Version: v0.1\n"); + seq_puts(m, "Timer Stats Version: v0.2\n"); seq_printf(m, "Sample period: %ld.%03ld s\n", period.tv_sec, ms); if (atomic_read(&overflow_count)) seq_printf(m, "Overflow: %d entries\n", @@ -303,8 +306,13 @@ static int tstats_show(struct seq_file *m, void *v) for (i = 0; i < nr_entries; i++) { entry = entries + i; - seq_printf(m, "%4lu, %5d %-16s ", + if (entry->timer_flag & TIMER_STATS_FLAG_DEFERRABLE) { + seq_printf(m, "%4luD, %5d %-16s ", entry->count, entry->pid, entry->comm); + } else { + seq_printf(m, " %4lu, %5d %-16s ", + entry->count, entry->pid, entry->comm); + } print_name_offset(m, (unsigned long)entry->start_func); seq_puts(m, " ("); diff --git a/kernel/timer.c b/kernel/timer.c index 1ab3106a2b5..1258371e0d2 100644 --- a/kernel/timer.c +++ b/kernel/timer.c @@ -305,6 +305,20 @@ void __timer_stats_timer_set_start_info(struct timer_list *timer, void *addr) memcpy(timer->start_comm, current->comm, TASK_COMM_LEN); timer->start_pid = current->pid; } + +static void timer_stats_account_timer(struct timer_list *timer) +{ + unsigned int flag = 0; + + if (unlikely(tbase_get_deferrable(timer->base))) + flag |= TIMER_STATS_FLAG_DEFERRABLE; + + timer_stats_update_stats(timer, timer->start_pid, timer->start_site, + timer->function, timer->start_comm, flag); +} + +#else +static void timer_stats_account_timer(struct timer_list *timer) {} #endif /** |