diff options
| author | Markus Mayer <mmayer@broadcom.com> | 2016-11-07 10:02:23 -0800 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-11-11 01:51:11 +0100 |
| commit | ee7930ee27fe5240398cc302fa8eb4454725f188 (patch) | |
| tree | 4ad6af7f88a71a8238e3e48778876c3fff64f6f5 /Documentation/cpu-freq | |
| parent | 26f0dbc9ab158afe86bac5ece2fcaf873d6bd8ad (diff) | |
| download | lwn-ee7930ee27fe5240398cc302fa8eb4454725f188.tar.gz lwn-ee7930ee27fe5240398cc302fa8eb4454725f188.zip | |
cpufreq: stats: New sysfs attribute for clearing statistics
Allow CPUfreq statistics to be cleared by writing anything to
/sys/.../cpufreq/stats/reset.
Signed-off-by: Markus Mayer <mmayer@broadcom.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'Documentation/cpu-freq')
| -rw-r--r-- | Documentation/cpu-freq/cpufreq-stats.txt | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/cpu-freq/cpufreq-stats.txt b/Documentation/cpu-freq/cpufreq-stats.txt index 8d9773f23550..3c355f6ad834 100644 --- a/Documentation/cpu-freq/cpufreq-stats.txt +++ b/Documentation/cpu-freq/cpufreq-stats.txt @@ -44,11 +44,17 @@ the stats driver insertion. total 0 drwxr-xr-x 2 root root 0 May 14 16:06 . drwxr-xr-x 3 root root 0 May 14 15:58 .. +--w------- 1 root root 4096 May 14 16:06 reset -r--r--r-- 1 root root 4096 May 14 16:06 time_in_state -r--r--r-- 1 root root 4096 May 14 16:06 total_trans -r--r--r-- 1 root root 4096 May 14 16:06 trans_table -------------------------------------------------------------------------------- +- reset +Write-only attribute that can be used to reset the stat counters. This can be +useful for evaluating system behaviour under different governors without the +need for a reboot. + - time_in_state This gives the amount of time spent in each of the frequencies supported by this CPU. The cat output will have "<frequency> <time>" pair in each line, which |