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| author | Dong Zhu <bluezhudong@gmail.com> | 2013-10-10 15:56:18 +0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-10-10 09:59:25 +0200 |
| commit | 2cb763614c1c5baef58045af9304265075f22d0a (patch) | |
| tree | e294e2b1ed1e872a46d651e133996182219f7d16 | |
| parent | 8a749de5e32d2b72def93f7bd7a2745580d75872 (diff) | |
| download | linux-2cb763614c1c5baef58045af9304265075f22d0a.tar.gz linux-2cb763614c1c5baef58045af9304265075f22d0a.tar.bz2 linux-2cb763614c1c5baef58045af9304265075f22d0a.zip | |
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>
| -rw-r--r-- | kernel/time/timer_stats.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/kernel/time/timer_stats.c b/kernel/time/timer_stats.c index 0b537f27b559..1fb08f21302e 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 { |