On SNO with DU profile(RT kernel) tuned profile is always degraded due to net.core.busy_read, net.core.busy_poll and kernel.numa_balancing sysctl not existing in RT kernel

4.14.1

100%

1. Deploy SNO with DU profile(RT kernel)
2. Check tuned profile

oc -n openshift-cluster-node-tuning-operator get profile -o yaml
apiVersion: v1
items:
- apiVersion: tuned.openshift.io/v1
  kind: Profile
  metadata:
    creationTimestamp: "2023-11-09T18:26:34Z"
    generation: 2
    name: sno.kni-qe-1.lab.eng.rdu2.redhat.com
    namespace: openshift-cluster-node-tuning-operator
    ownerReferences:
    - apiVersion: tuned.openshift.io/v1
      blockOwnerDeletion: true
      controller: true
      kind: Tuned
      name: default
      uid: 4e7c05a2-537e-4212-9009-e2724938dec9
    resourceVersion: "287891"
    uid: 5f4d5819-8f84-4b3b-9340-3d38c41501ff
  spec:
    config:
      debug: false
      tunedConfig: {}
      tunedProfile: performance-patch
  status:
    conditions:
    - lastTransitionTime: "2023-11-09T18:26:39Z"
      message: TuneD profile applied.
      reason: AsExpected
      status: "True"
      type: Applied
    - lastTransitionTime: "2023-11-09T18:26:39Z"
      message: 'TuneD daemon issued one or more error message(s) during profile application.
        TuneD stderr: net.core.rps_default_mask'
      reason: TunedError
      status: "True"
      type: Degraded
    tunedProfile: performance-patch
kind: List
metadata:
  resourceVersion: ""

Not degraded

Looking at the tuned log the following errors show up which are probably causing the profile to get into degraded state:

2023-11-09 18:30:49,287 ERROR    tuned.plugins.plugin_sysctl: Failed to read sysctl parameter 'net.core.busy_read', the parameter does not exist
2023-11-09 18:30:49,287 ERROR    tuned.plugins.plugin_sysctl: sysctl option net.core.busy_read will not be set, failed to read the original value.
2023-11-09 18:30:49,287 ERROR    tuned.plugins.plugin_sysctl: Failed to read sysctl parameter 'net.core.busy_poll', the parameter does not exist
2023-11-09 18:30:49,287 ERROR    tuned.plugins.plugin_sysctl: sysctl option net.core.busy_poll will not be set, failed to read the original value.
2023-11-09 18:30:49,287 ERROR    tuned.plugins.plugin_sysctl: Failed to read sysctl parameter 'kernel.numa_balancing', the parameter does not exist
2023-11-09 18:30:49,287 ERROR    tuned.plugins.plugin_sysctl: sysctl option kernel.numa_balancing will not be set, failed to read the original value.

These sysctl parameters seem not to be available with RT kernel.