Messages in this thread Patch in this message | | | Date | Thu, 10 Oct 2013 04:25:17 -0700 | From | tip-bot for Dong Zhu <> | Subject | [tip:timers/core] timer stats: Add a 'Collection: active/inactive ' line to timer usage statistics |
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Commit-ID: 2cb763614c1c5baef58045af9304265075f22d0a Gitweb: http://git.kernel.org/tip/2cb763614c1c5baef58045af9304265075f22d0a Author: Dong Zhu <bluezhudong@gmail.com> AuthorDate: Thu, 10 Oct 2013 15:56:18 +0800 Committer: Ingo Molnar <mingo@kernel.org> CommitDate: Thu, 10 Oct 2013 09:59:25 +0200
timer stats: Add a 'Collection: active/inactive' line to timer usage statistics
We can enable/disable timer statistics collection via:
echo [1|0] > /proc/timers_stats
and it would be nice if apps had the ability to check what the current collection status is.
This patch adds a 'Collection: active/inactive' line to display the current timer collection status.
Also bump up the timer stats version to v0.3.
Signed-off-by: Dong Zhu <bluezhudong@gmail.com> Cc: John Stultz <john.stultz@linaro.org> Link: http://lkml.kernel.org/r/20131010075618.GH2139@zhudong.nay.redhat.com [ Improved the changelog and the code. ] Signed-off-by: Ingo Molnar <mingo@kernel.org> --- kernel/time/timer_stats.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/kernel/time/timer_stats.c b/kernel/time/timer_stats.c index 0b537f2..1fb08f2 100644 --- a/kernel/time/timer_stats.c +++ b/kernel/time/timer_stats.c @@ -298,15 +298,15 @@ 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: v0.2\n"); + seq_puts(m, "Timer Stats Version: v0.3\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", - atomic_read(&overflow_count)); + seq_printf(m, "Overflow: %d entries\n", atomic_read(&overflow_count)); + seq_printf(m, "Collection: %s\n", timer_stats_active ? "active" : "inactive"); for (i = 0; i < nr_entries; i++) { entry = entries + i; - if (entry->timer_flag & TIMER_STATS_FLAG_DEFERRABLE) { + if (entry->timer_flag & TIMER_STATS_FLAG_DEFERRABLE) { seq_printf(m, "%4luD, %5d %-16s ", entry->count, entry->pid, entry->comm); } else {
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