Bug 1297 - Over 4% CPU hotspot in cgroup_idle_
Summary: Over 4% CPU hotspot in cgroup_idle_
Status: CONFIRMED
Alias: None
Product: ANCK 5.10 Dev
Classification: ANCK
Component: sched (show other bugs) sched
Version: unspecified
Hardware: All Linux
: P3-Medium S3-normal
Target Milestone: ---
Assignee: wuyihao66
QA Contact: shuming
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2022-05-20 15:05 UTC by wuyihao
Modified: 2022-05-23 17:42 UTC (History)
2 users (show)

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Description wuyihao 2022-05-20 15:05:51 UTC 
Description of problem:
Sched SLI introduces much overhead at cgroup_idle_{start,end}

Version-Release number of selected component (if applicable):


How reproducible:

Steps to Reproduce:
1. Switch on kernel.sched_schedstat
2. Create many frequently sleep and wake tasks
3. perf top

Actual results:
Hotspot in cgroup_idle_{start,end}

Expected results:
No hotspot

Additional info: