RHEL8: cgroup_rstat_updated()/cgroup_rstat_flush() に関連するカーネル関数の実行レイテンシーが高い
Issue
- cgroup_destroy の待機時間が長くなっています。
# pidstat -G kworker 1
12:33:53 PM UID PID %usr %system %guest %wait %CPU CPU Command
12:33:54 PM 0 2392 0.00 1.00 0.00 18.00 1.00 0 kworker/0:2-cgroup_pidlist_destroy
12:33:54 PM 0 10966 0.00 1.00 0.00 42.00 1.00 0 kworker/0:0-cgroup_destroy
Environment
- Red Hat Enterprise Linux 8
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