RHEL8: Seeing high latency execution of kernel functions associated with cgroup_rstat_updated()/cgroup_rstat_flush()

Solution Verified - Updated -

Issue

  • There is high wait time on cgroup_destroy.
# 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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