Uploaded image for project: 'OpenShift Bugs'
  1. OpenShift Bugs
  2. OCPBUGS-3080

[4.12] RPS hook only sets the first queue, but there are now many

    XMLWordPrintable

Details

    • Bug
    • Resolution: Done
    • Major
    • None
    • 4.13, 4.12
    • Performance Addon Operator
    • None

    Description

      Description of problem:

      The UDP GRO feature was enabled for 4.12 and veth devices now have many RX queues created by default. Used to be just rx-0 before.

The latency tuning will not be correct until all the queues are configure properly.

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

      NTO in 4.12 and master branch

      How reproducible:

      Always on latency sensitive system.

      Steps to Reproduce:

      1. Use low latency tuning, enable real time.
2. Check veth RPS masks using /sys/class/net/${dev}/queues/rx-*/rps_cpus
3.

      Actual results:

      The masks will be different when realtime tuning is applies. RX-0 will have the reserved mask, all the others will be 0.

      Expected results:

      All queues configured.

      Additional info:

       

       

      Attachments

        Issue Links

          clones

          Bug - A problem that impairs or prevents the functions of the product. OCPBUGS-3079 RPS hook only sets the first queue, but there are now many

          • 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
          depends on

          Bug - A problem that impairs or prevents the functions of the product. OCPBUGS-3079 RPS hook only sets the first queue, but there are now many

          • 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
          is blocked by

          Bug - A problem that impairs or prevents the functions of the product. OCPBUGS-3079 RPS hook only sets the first queue, but there are now many

          • 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
          links to

          GitHub openshift/cluster-node-tuning-operator#503: [release-4.12] OCPBUGS-3080: OCPBUGSM-47141: Apply RPS mask for each RX queues

          Activity

            People

              titzhak Talor Itzhak
              msivak@redhat.com Martin Sivak
              Mallapadi Niranjan Mallapadi Niranjan
              Martin Sivak
              Votes:
              0 Vote for this issue
              Watchers:
              4 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved: