On Mon, Jun 10, 2013 at 03:57:45PM +0800, Dong Zhu wrote: > From 4dbb760213856dc382241db456c1c6487694837c Mon Sep 17 00:00:00 2001 > From: Dong Zhu <bluezhud...@gmail.com> > Date: Mon, 10 Jun 2013 15:09:27 +0800 > > we can start/stop data collection by using : > echo [1|0] > /proc/timer_stats > when we stop the data collection,hrtimer will not update the statistics > for a timer any more,but we could still check the timer usage > statistics,unfortunately the data is not the latest, the inaccurate data > might make us confusing. So the purpose of this patch is to reset the > entries once disable operation is executed.In this way we will never > see the inaccurate timer usage statistics. > > Signed-off-by: Dong Zhu <bluezhud...@gmail.com> > --- > kernel/time/timer_stats.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/kernel/time/timer_stats.c b/kernel/time/timer_stats.c > index 0b537f2..43f05e7 100644 > --- a/kernel/time/timer_stats.c > +++ b/kernel/time/timer_stats.c > @@ -371,6 +371,7 @@ static ssize_t tstats_write(struct file *file, const char > __user *buf, > switch (ctl[0]) { > case '0': > if (timer_stats_active) { > + reset_entries(); > timer_stats_active = 0; > time_stop = ktime_get(); > sync_access(); > -- > 1.7.11.7
Hi all, Any comments here ? -- Best Regards, Dong Zhu -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/