Bug 1960386 - The stalld service has a higher scheduler priority than ksoftirq and rcu{b, c} threads
Summary: The stalld service has a higher scheduler priority than ksoftirq and rcu{b, c...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: OpenShift Container Platform
Classification: Red Hat
Component: Performance Addon Operator
Version: 4.6
Hardware: x86_64
OS: Linux
unspecified
high
Target Milestone: ---
: 4.6.z
Assignee: Yanir Quinn
QA Contact: Gowrishankar Rajaiyan
URL:
Whiteboard:
Depends On: 1905492 1985371
Blocks:
TreeView+ depends on / blocked
 
Reported: 2021-05-13 18:28 UTC by Yanir Quinn
Modified: 2021-11-26 14:33 UTC (History)
6 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of: 1905492
Environment:
Last Closed: 2021-06-22 11:22:12 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Github openshift-kni performance-addon-operators pull 627 0 None open Bug 1960386: Update the tuned profile to set higher scheduler priority 2021-05-13 19:23:30 UTC
Github openshift-kni performance-addon-operators pull 685 0 None open e2e: Add stalld scheduling priority test 2021-07-12 12:45:19 UTC
Red Hat Product Errata RHBA-2021:2482 0 None None None 2021-06-22 11:22:18 UTC

Comment 1 Shereen Haj Makhoul 2021-06-17 15:39:45 UTC 
Verifying the defect on 4.6.34:

[root@ocp-edge41 performance]# oc version
Client Version: 4.6.34
Server Version: 4.6.34
Kubernetes Version: v1.19.0+c3e2e69

PAO version is 4.6.4-4

I ran these commands to validate the result :
oc get tuned -A
oc project openshift-cluster-node-tuning-operator
oc get tuned
oc describe tuned/openshift-node-performance-performance

and on the last command got the following output :

.
.
.
[service]
service.stalld=start,enable


[vm]
transparent_hugepages=never                   #  network-latency

[scheduler]
group.ksoftirqd=0:f:11:*:ksoftirqd.*
group.rcuc=0:f:11:*:rcuc.*
Comment 4 errata-xmlrpc 2021-06-22 11:22:12 UTC 
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 (OpenShift Container Platform 4.6.35 low-latency extras 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/RHBA-2021:2482
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