8.2.3. Recommended cluster kernel configuration

apiVersion: performance.openshift.io/v2
kind: PerformanceProfile
# ...
spec:
  additionalKernelArgs:
  - "rcupdate.rcu_normal_after_boot=0"
  - "efi=runtime"
  - "vfio_pci.enable_sriov=1"
  - "vfio_pci.disable_idle_d3=1"
  - "module_blacklist=irdma"

  # ...

apiVersion: performance.openshift.io/v2
kind: PerformanceProfile
metadata:
  name: openshift-node-performance-profile
spec:
      cpu:
        isolated: "2-19,22-39"
        reserved: "0-1,20-21"
      hugepages:
        defaultHugepagesSize: 1G
        pages:
          - size: 1G
            count: 32
      realTimeKernel:
          enabled: true
      hardwareTuning:
          isolatedCpuFreq: 2500000
          reservedCpuFreq: 2500000

apiVersion: tuned.openshift.io/v1
kind: Tuned
metadata:
  name: performance-patch
  namespace: openshift-cluster-node-tuning-operator
  annotations:
    ran.openshift.io/ztp-deploy-wave: "10"
spec:
  profile:
    - name: performance-patch
      # The 'include' line must match the associated PerformanceProfile name, for example:
      # include=openshift-node-performance-${PerformanceProfile.metadata.name}
      # When using the standard (non-realtime) kernel, remove the kernel.timer_migration override from the [sysctl] section
      data: |
        [main]
        summary=Configuration changes profile inherited from performance created tuned
        include=openshift-node-performance-openshift-node-performance-profile
        [scheduler]
        group.ice-ptp=0:f:10:*:ice-ptp.*
        group.ice-gnss=0:f:10:*:ice-gnss.*
        group.ice-dplls=0:f:10:*:ice-dplls.*
        [service]
        service.stalld=start,enable
        service.chronyd=stop,disable
# ...