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  1. OpenShift Bugs
  2. OCPBUGS-13148

cgroupv1 support for cpu balancing is broken for non-SNO nodes

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    • CNF Compute Sprint 236
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      05/10/2023:
      NTO PR merged in 4.13
      Waiting on K8S PR to be merged to a complete fix
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      05/10/2023: NTO PR merged in 4.13 Waiting on K8S PR to be merged to a complete fix

    Description

      Description of problem:

      Deployment of a standard masters+workers cluster using 4.13.0-rc.6 does not configure the cgroup structure according to OCPNODE-1539

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

      OCP 4.13.0-rc.6

      How reproducible:

      Always

      Steps to Reproduce:

      1. Deploy the cluster
2. Check for presence of /sys/fs/cgroup/cpuset/system*
3. Check the status of cpu balancing of the root cpuset cgroup (should be disabled)

      Actual results:

      No system cpuset exists and all services are still present in the root cgroup with cpu balancing enabled.

      Expected results:

       

      Additional info:

      The code has a bug we missed. It is nested under the Workload partitioning check on line https://github.com/haircommander/cluster-node-tuning-operator/blob/123e26df30c66fd5c9836726bd3e4791dfd82309/pkg/performanceprofile/controller/performanceprofile/components/machineconfig/machineconfig.go#L251

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          Bug - A problem that impairs or prevents the functions of the product. OCPBUGS-13747 [4.13] cgroupv1 support for cpu balancing is broken for non-SNO nodes

          • Blocker - To be worked above all other priorities. This term is chosen when the severity of the issue is very high, has no workaround, or the effort for the change is comparatively low. Issues that may be very publicly visible and could generate significant media attention may also drive a higher priority.
          • Closed
          is cloned by

          Bug - A problem that impairs or prevents the functions of the product. OCPBUGS-13163 [4.13] cgroupv1 support for cpu balancing is broken for non-SNO nodes

          • Blocker - To be worked above all other priorities. This term is chosen when the severity of the issue is very high, has no workaround, or the effort for the change is comparatively low. Issues that may be very publicly visible and could generate significant media attention may also drive a higher priority.
          • Closed

          Bug - A problem that impairs or prevents the functions of the product. OCPBUGS-13747 [4.13] cgroupv1 support for cpu balancing is broken for non-SNO nodes

          • Blocker - To be worked above all other priorities. This term is chosen when the severity of the issue is very high, has no workaround, or the effort for the change is comparatively low. Issues that may be very publicly visible and could generate significant media attention may also drive a higher priority.
          • Closed
          is related to

          Bug - A problem that impairs or prevents the functions of the product. OCPBUGS-13301 GitOps ZTP does not support enabling multi-node workload partitioning

          • Major - To be worked after higher priority work items are addressed. When the severity is high and the effort to change it is low to moderate, this term is chosen. Issues in this category likely have an existing workaround but implementation or execution may be non-trivial.
          • Closed

          Bug - A problem that impairs or prevents the functions of the product. OCPBUGS-16409 Verify multi-node WLP enablement when feature is GA

          • Major - To be worked after higher priority work items are addressed. When the severity is high and the effort to change it is low to moderate, this term is chosen. Issues in this category likely have an existing workaround but implementation or execution may be non-trivial.
          • Closed
          relates to

          Story - Created by Jira Software - do not edit or delete. Issue type for a user story. OCPNODE-1539 PAO support for cpu load balancing on cgroupv1 and RHEL 9

          • Critical - To be worked on immediately following BLOCKER issues.
          • Closed
          links to

          GitHub openshift/cluster-node-tuning-operator#646: OCPBUGS-13148: Configure cpu balancing cpu sets for all clusters

          GitHub openshift/kubernetes#1573: OCPBUGS-13148: kubelet/cm: disable cpu load balancing on slices when using static cpu manager policy

          Web Link RHEA-2023:5006 rpm

          Activity

            People

              pehunt@redhat.com Peter Hunt
              msivak@redhat.com Martin Sivak
              Mallapadi Niranjan Mallapadi Niranjan
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              Dates

                Created:
                Updated:
                Resolved: