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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-12-10 12:30:23 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-12-12 23:22:18 +0100 |
| commit | 04dab58a39d402162a7effe7278df8cd41557252 (patch) | |
| tree | 72ef8dca1e3a3d56bf68ce729678c638dd247e8b /Documentation/ABI | |
| parent | 9456823c842f346c74265fcd98d008d87a7eb6f5 (diff) | |
| download | linux-04dab58a39d402162a7effe7278df8cd41557252.tar.bz2 | |
cpuidle: Add 'above' and 'below' idle state metrics
Add two new metrics for CPU idle states, "above" and "below", to count
the number of times the given state had been asked for (or entered
from the kernel's perspective), but the observed idle duration turned
out to be too short or too long for it (respectively).
These metrics help to estimate the quality of the CPU idle governor
in use.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-devices-system-cpu | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu index 73318225a368..9605dbd4b5b5 100644 --- a/Documentation/ABI/testing/sysfs-devices-system-cpu +++ b/Documentation/ABI/testing/sysfs-devices-system-cpu @@ -145,6 +145,8 @@ What: /sys/devices/system/cpu/cpuX/cpuidle/stateN/name /sys/devices/system/cpu/cpuX/cpuidle/stateN/power /sys/devices/system/cpu/cpuX/cpuidle/stateN/time /sys/devices/system/cpu/cpuX/cpuidle/stateN/usage + /sys/devices/system/cpu/cpuX/cpuidle/stateN/above + /sys/devices/system/cpu/cpuX/cpuidle/stateN/below Date: September 2007 KernelVersion: v2.6.24 Contact: Linux power management list <linux-pm@vger.kernel.org> @@ -166,6 +168,11 @@ Description: usage: (RO) Number of times this state was entered (a count). + above: (RO) Number of times this state was entered, but the + observed CPU idle duration was too short for it (a count). + + below: (RO) Number of times this state was entered, but the + observed CPU idle duration was too long for it (a count). What: /sys/devices/system/cpu/cpuX/cpuidle/stateN/desc Date: February 2008 |