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authorVenki Pallipadi <venkatesh.pallipadi@intel.com>2007-07-15 23:40:30 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-16 09:05:45 -0700
commitc5c061b8f9726bc2c25e19dec227933a13d1e6b7 (patch)
treee99f68f70df1a01dd383007895befd114a1da8c4 /kernel
parente0807061908a7a9441d0f745deb444f7216904cb (diff)
downloadop-kernel-dev-c5c061b8f9726bc2c25e19dec227933a13d1e6b7.zip
op-kernel-dev-c5c061b8f9726bc2c25e19dec227933a13d1e6b7.tar.gz
Add a flag to indicate deferrable timers in /proc/timer_stats
Add a flag in /proc/timer_stats to indicate deferrable timers. This will let developers/users to differentiate between types of tiemrs in /proc/timer_stats. Deferrable timer and normal timer will appear in /proc/timer_stats as below. 10D, 1 swapper queue_delayed_work_on (delayed_work_timer_fn) 10, 1 swapper queue_delayed_work_on (delayed_work_timer_fn) Also version of timer_stats changes from v0.1 to v0.2 Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Acked-by: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: john stultz <johnstul@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/time/timer_stats.c14
-rw-r--r--kernel/timer.c14
2 files changed, 25 insertions, 3 deletions
diff --git a/kernel/time/timer_stats.c b/kernel/time/timer_stats.c
index 3216937..9b8a826 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 1ab3106..1258371 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
/**
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