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| author | Tejun Heo <tj@kernel.org> | 2017-10-23 16:18:27 -0700 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2017-10-26 10:56:33 -0700 |
| commit | d41bf8c9deaed1a90b18d3ffc5639d4c19f0259a (patch) | |
| tree | 38573de8fb3d037a30430bd16af6806031c2036c /Documentation/cgroup-v2.txt | |
| parent | 0d5936344f30aba0f6ddb92b030cb6a05168efe6 (diff) | |
| download | op-kernel-dev-d41bf8c9deaed1a90b18d3ffc5639d4c19f0259a.zip op-kernel-dev-d41bf8c9deaed1a90b18d3ffc5639d4c19f0259a.tar.gz | |
cgroup, sched: Move basic cpu stats from cgroup.stat to cpu.stat
The basic cpu stat is currently shown with "cpu." prefix in
cgroup.stat, and the same information is duplicated in cpu.stat when
cpu controller is enabled. This is ugly and not very scalable as we
want to expand the coverage of stat information which is always
available.
This patch makes cgroup core always create "cpu.stat" file and show
the basic cpu stat there and calls the cpu controller to show the
extra stats when enabled. This ensures that the same information
isn't presented in multiple places and makes future expansion of basic
stats easier.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Diffstat (limited to 'Documentation/cgroup-v2.txt')
| -rw-r--r-- | Documentation/cgroup-v2.txt | 15 |
1 files changed, 5 insertions, 10 deletions
diff --git a/Documentation/cgroup-v2.txt b/Documentation/cgroup-v2.txt index 0bbdc72..779211f 100644 --- a/Documentation/cgroup-v2.txt +++ b/Documentation/cgroup-v2.txt @@ -886,15 +886,6 @@ All cgroup core files are prefixed with "cgroup." A dying cgroup can consume system resources not exceeding limits, which were active at the moment of cgroup deletion. - cpu.usage_usec - CPU time consumed in the subtree. - - cpu.user_usec - User CPU time consumed in the subtree. - - cpu.system_usec - System CPU time consumed in the subtree. - Controllers =========== @@ -915,12 +906,16 @@ All time durations are in microseconds. cpu.stat A read-only flat-keyed file which exists on non-root cgroups. + This file exists whether the controller is enabled or not. - It reports the following six stats: + It always reports the following three stats: - usage_usec - user_usec - system_usec + + and the following three when the controller is enabled: + - nr_periods - nr_throttled - throttled_usec |
