diff options
| author | Lina Iyer <ilina@codeaurora.org> | 2020-09-22 12:34:16 -0600 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2020-09-23 14:10:31 +0200 |
| commit | f49735f4978f479b0de4f50ab217d5a56bc83c55 (patch) | |
| tree | ff16650624327711ecff8d9a6b2b885585dd9245 /include/linux/cpuidle.h | |
| parent | 70c179b49870929ca183421935415622d30875b5 (diff) | |
cpuidle: record state entry rejection statistics
CPUs may fail to enter the chosen idle state if there was a
pending interrupt, causing the cpuidle driver to return an error
value.
Record that and export it via sysfs along with the other idle state
statistics.
This could prove useful in understanding behavior of the governor
and the system during usecases that involve multiple CPUs.
Signed-off-by: Lina Iyer <ilina@codeaurora.org>
[ rjw: Changelog and documentation edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/linux/cpuidle.h')
| -rw-r--r-- | include/linux/cpuidle.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h index 6175c77bf25e..ed0da0e58e8b 100644 --- a/include/linux/cpuidle.h +++ b/include/linux/cpuidle.h @@ -38,6 +38,7 @@ struct cpuidle_state_usage { u64 time_ns; unsigned long long above; /* Number of times it's been too deep */ unsigned long long below; /* Number of times it's been too shallow */ + unsigned long long rejected; /* Number of times idle entry was rejected */ #ifdef CONFIG_SUSPEND unsigned long long s2idle_usage; unsigned long long s2idle_time; /* in US */ |