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  1. OpenShift Bugs
  2. OCPBUGS-29611

Failed to restore pm_qos_resume_latency_us value when container restart on QoS Guaranteed pod

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    • Icon: Bug Bug
    • Resolution: Unresolved
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    • 4.14.z
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    • CNF RAN Sprint 250, CNF RAN Sprint 251, CNF Ran Sprint 252, CNF Ran Sprint 253
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      Description of problem:

      When I deploy a QoS Guaranteed with cpu-c-states.crio.io: disabled pod annotation, and when there
      has been a container restart e.g. in the describe the container failed once
      ```
        Normal  Pulled          2m54s                  kubelet            Successfully pulled image "quay.io/karampok/dpdk:latest" in 862.099864ms (862.110666ms including waiting)
        Normal  Created         2m53s (x2 over 2m55s)  kubelet            Created container io
        Normal  Started         2m53s (x2 over 2m55s)  kubelet            Started container io
      ```
      
      the value of pm_qos_resume_latency_us is not restored after a delete
      ```
      cat /var/run/crio/cpu/cpu10/power/pm_qos_resume_latency_us
      n/a #while the default should be 0
      ```
      
      Same for the `cpu-freq-governor.crio.io:` but that less impact as it not keep the core in C0 when idle 

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

          

      How reproducible:

      Deploy a guaranteed pods that use these annotations and ave a container restart.

      Steps to Reproduce:

          1.
          2.
          3.
          

      Actual results:

          

      Expected results:

          

      Additional info:

          

            bwensley@redhat.com Bart Wensley
            kkarampo@redhat.com Konstantinos Karampogias
            Sunil Choudhary Sunil Choudhary
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              Created:
              Updated: