Bug 2114681
| Summary: | Kernel parm needs to be added when a pao performance profile is applied, rcutree.kthread_prio=11 | ||
|---|---|---|---|
| Product: | OpenShift Container Platform | Reporter: | OpenShift BugZilla Robot <openshift-bugzilla-robot> |
| Component: | Performance Addon Operator | Assignee: | Vitaly Grinberg <vgrinber> |
| Status: | CLOSED ERRATA | QA Contact: | Shereen Haj Makhoul <shajmakh> |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | 4.11 | CC: | bzvonar, dagray, grajaiya, keyoung, shajmakh, vgrinber |
| Target Milestone: | --- | ||
| Target Release: | 4.11.z | ||
| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2022-09-07 20:49:26 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 2102450 | ||
| Bug Blocks: | |||
moving back to QA as the last say is for OCP-QE Verified as per comment #2. Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (Moderate: OpenShift Container Platform 4.11.3 packages and security update), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2022:6287 |
Verification: Version: OCP: 4.11.1 Steps: 1. apply the following PP with RT enabled: apiVersion: performance.openshift.io/v2 kind: PerformanceProfile metadata: name: performance spec: cpu: isolated: "0-2" reserved: "3" nodeSelector: node-role.kubernetes.io/worker: "" realTimeKernel: enabled: true 2. once nodes are up, verify the kernel parameter was set to 11: 2.1: [root@registry ~]# oc get tuned -A NAMESPACE NAME AGE openshift-cluster-node-tuning-operator default 92m openshift-cluster-node-tuning-operator openshift-node-performance-performance 21m openshift-cluster-node-tuning-operator rendered 92m [root@registry ~]# oc get tuned openshift-node-performance-performance -n openshift-cluster-node-tuning-operator -o yaml | grep "rcutree.kthread_prio" tsc=nowatchdog nosoftlockup nmi_watchdog=0 mce=off skew_tick=1 rcutree.kthread_prio=11\n\n\n\n\n\n\ncmdline_hugepages=+ 2.2: [root@registry ~]# oc get profiles -A NAMESPACE NAME TUNED APPLIED DEGRADED AGE openshift-cluster-node-tuning-operator master-0 openshift-control-plane True False 104m openshift-cluster-node-tuning-operator master-1 openshift-control-plane True False 104m openshift-cluster-node-tuning-operator master-2 openshift-control-plane True False 104m openshift-cluster-node-tuning-operator worker-0 openshift-node-performance-performance True True 73m openshift-cluster-node-tuning-operator worker-1 openshift-node-performance-performance True True 72m [root@registry ~]# oc get profiles worker-0 -n openshift-cluster-node-tuning-operator -o yaml | grep "rcutree.kthread_prio" ^[[A nosoftlockup nmi_watchdog=0 mce=off skew_tick=1 rcutree.kthread_prio=11 + + [root@registry ~]# oc get profiles worker-1 -n openshift-cluster-node-tuning-operator -o yaml | grep "rcutree.kthread_prio" nosoftlockup nmi_watchdog=0 mce=off skew_tick=1 rcutree.kthread_prio=11 + + 2.3: from the nodes: worker-0: sh-4.4# cat /proc/cmdline | grep rcutree.kthread_prio BOOT_IMAGE=(hd0,gpt3)/ostree/rhcos-61413a411598b33ae4d1db997db327de680a9ca8b5216a7ea19fbbb3e7f78ec2/vmlinuz-4.18.0-372.19.1.rt7.176.el8_6.x86_64 random.trust_cpu=on console=tty0 console=ttyS0,115200n8 ignition.platform.id=metal ostree=/ostree/boot.0/rhcos/61413a411598b33ae4d1db997db327de680a9ca8b5216a7ea19fbbb3e7f78ec2/0 ip=dhcp root=UUID=a14a8f60-de23-4b0b-9ac6-3156fa908bbb rw rootflags=prjquota boot=UUID=1590adf7-8b9d-4647-9c3f-0ab32e304552 skew_tick=1 nohz=on rcu_nocbs=0-2 tuned.non_isolcpus=0000ffff,ffffffff,fffffff8 systemd.cpu_affinity=3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79 intel_iommu=on iommu=pt isolcpus=managed_irq,0-2 nohz_full=0-2 tsc=nowatchdog nosoftlockup nmi_watchdog=0 mce=off skew_tick=1 rcutree.kthread_prio=11 + + sh-4.4# worker-1: sh-4.4# cat /proc/cmdline | grep rcutree.kthread_prio BOOT_IMAGE=(hd0,gpt3)/ostree/rhcos-61413a411598b33ae4d1db997db327de680a9ca8b5216a7ea19fbbb3e7f78ec2/vmlinuz-4.18.0-372.19.1.rt7.176.el8_6.x86_64 random.trust_cpu=on console=tty0 console=ttyS0,115200n8 ignition.platform.id=metal ostree=/ostree/boot.0/rhcos/61413a411598b33ae4d1db997db327de680a9ca8b5216a7ea19fbbb3e7f78ec2/0 ip=dhcp root=UUID=5b4a95be-43a2-4b89-b7af-3692bd43170d rw rootflags=prjquota boot=UUID=9fbbe4d8-430a-4369-888a-2f53f5f8ecee skew_tick=1 nohz=on rcu_nocbs=0-2 tuned.non_isolcpus=0000ffff,ffffffff,fffffff8 systemd.cpu_affinity=3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79 intel_iommu=on iommu=pt isolcpus=managed_irq,0-2 nohz_full=0-2 tsc=nowatchdog nosoftlockup nmi_watchdog=0 mce=off skew_tick=1 rcutree.kthread_prio=11 + + As can be seen, KConfig was updated with the new value rcutree.kthread_prio=11.