OCPBUGS-74027: AA: E2E: LLC: Add tests related to odd cpus #1458

mrniranjan · 2026-01-17T07:04:23Z

Adds tests related to Odd integer cpu alignment
with full-pcpus-only: false

Assisted-by: Cursor v2.1.39
AI Attribution: AIA PAI Hin v1.0 Model: Auto

openshift-ci · 2026-01-17T07:04:49Z

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Adds tests related to Odd integer cpu alignment with full-pcpus-only: false Assisted-by: Cursor v2.1.39 AI Attribution: AIA PAI Hin v1.0 Signed-off-by: Niranjan M.R <mniranja@redhat.com>

openshift-ci-robot · 2026-01-17T12:11:54Z

@mrniranjan: This pull request references Jira Issue OCPBUGS-74027, which is valid. The bug has been moved to the POST state.

3 validation(s) were run on this bug

bug is open, matching expected state (open)
bug target version (4.22.0) matches configured target version for branch (4.22.0)
bug is in the state New, which is one of the valid states (NEW, ASSIGNED, POST)

Requesting review from QA contact:
/cc @mrniranjan

The bug has been updated to refer to the pull request using the external bug tracker.

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In response to this:

Adds tests related to Odd integer cpu alignment
with full-pcpus-only: false

Assisted-by: Cursor v2.1.39
AI Attribution: AIA PAI Hin v1.0 Model: Auto

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openshift-ci · 2026-01-17T12:11:56Z

@openshift-ci-robot: GitHub didn't allow me to request PR reviews from the following users: mrniranjan.

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In response to this:

@mrniranjan: This pull request references Jira Issue OCPBUGS-74027, which is valid. The bug has been moved to the POST state.

3 validation(s) were run on this bug

bug is open, matching expected state (open)

bug target version (4.22.0) matches configured target version for branch (4.22.0)

bug is in the state New, which is one of the valid states (NEW, ASSIGNED, POST)

Requesting review from QA contact:
/cc @mrniranjan

The bug has been updated to refer to the pull request using the external bug tracker.

In response to this:

Adds tests related to Odd integer cpu alignment
with full-pcpus-only: false

Assisted-by: Cursor v2.1.39
AI Attribution: AIA PAI Hin v1.0 Model: Auto

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.

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mrniranjan · 2026-01-17T15:22:23Z

/retest

Tal-or

overall looking good.
few comments inside

Tal-or · 2026-01-19T08:16:04Z

test/e2e/performanceprofile/functests/13_llc/llc.go

+				// Restore original policy with full-pcpus-only: true
+				perfProfile, err := profiles.GetByNodeLabels(testutils.NodeSelectorLabels)
+				Expect(err).ToNot(HaveOccurred())
+				prof := perfProfile.DeepCopy()


We already DeepCopy the original profile in the BeforeAll we can use it for the revert.

Addressed in latest commit

Tal-or · 2026-01-19T08:33:35Z

test/e2e/performanceprofile/functests/13_llc/llc.go

+				testlog.TaggedInfof("Pod", "CPUs used by %q are: %q (requested: %d)", testpod.Name, podCpuset.String(), requestedCPUs)
+
+				// Verify the pod got exactly the requested number of CPUs
+				Expect(podCpuset.Size()).To(Equal(requestedCPUs), "Pod should have exactly %d CPUs, got %d", requestedCPUs, podCpuset.Size())


nit: checking that we got the exact number of requested cpus is basically checking the kubelet core basic logic.
I would say it's redundant.

Addressed in latest commit

Tal-or · 2026-01-19T08:34:11Z

test/e2e/performanceprofile/functests/13_llc/llc.go

+				testlog.TaggedInfof("Pod", "CPUs used by %q are: %q (requested: %d)", testpod.Name, podCpuset.String(), requestedCPUs)
+
+				// Verify the pod got exactly the requested number of CPUs
+				Expect(podCpuset.Size()).To(Equal(requestedCPUs), "Pod should have exactly %d CPUs, got %d", requestedCPUs, podCpuset.Size())


Addressed in latest commit

Signed-off-by: Niranjan M.R <mniranja@redhat.com>

ffromani

the general direction looks OK, will have a final pass once the minorish inline comments are addressed

ffromani · 2026-01-19T13:03:04Z

test/e2e/performanceprofile/functests/13_llc/llc.go

+				llcPolicyOddCPUs := `{"cpuManagerPolicyOptions":{"prefer-align-cpus-by-uncorecache":"true", "full-pcpus-only":"false"}}`
+				perfProfile, err := profiles.GetByNodeLabels(testutils.NodeSelectorLabels)
+				Expect(err).ToNot(HaveOccurred())
+				initialProfile = perfProfile.DeepCopy()


do we want to use the top-level initial profile or do we want to add a more localized variable?
I'm slightly leaning towards the latter but I don't really have strong preferences

fixed in latest commit

ffromani · 2026-01-19T13:04:35Z

test/e2e/performanceprofile/functests/13_llc/llc.go

+			BeforeEach(func() {
+				hasBaremetal := false
+				for i := range workerRTNodes {
+					isVM, err := infrastructure.IsVM(context.Background(), &workerRTNodes[i])
+					Expect(err).ToNot(HaveOccurred())
+					if !isVM {
+						hasBaremetal = true
+						break
+					}
+				}
+				if !hasBaremetal {
+					Skip("Skipping test. All workers in this test setup are VMs, no baremetal node was found")
+				}
+			})


this should probably be the first thing we do in BeforeAll. Furthermore, this checks we have at least 1 BM worker. Would it be useful to track and only use the BM workers later on?

Addressed in latest commit

ffromani · 2026-01-19T13:05:47Z

test/e2e/performanceprofile/functests/13_llc/llc.go

+
+			It("[test_id:87072] Odd integer CPU request: 3 CPUs should prefer whole cores", func(ctx context.Context) {
+				requestedCPUs := 3
+				targetNode := workerRTNodes[0]


this picks a random worker node. Which is ok, as long as we pick a random worker node among the BM ones.

This test will exclusively run on Hardware that supports Uncore Cache . And typically in our downstream CI we label worker-cnf only to those nodes that support this feature

Signed-off-by: Niranjan M.R <mniranja@redhat.com>

mrniranjan · 2026-01-19T17:01:17Z

/retest

openshift-ci · 2026-01-19T18:39:40Z

@mrniranjan: all tests passed!

Full PR test history. Your PR dashboard.

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openshift-ci bot requested review from Tal-or and ffromani January 17, 2026 07:04

AA: E2E: LLC: Add tests related to odd cpus

b9c4461

Adds tests related to Odd integer cpu alignment with full-pcpus-only: false Assisted-by: Cursor v2.1.39 AI Attribution: AIA PAI Hin v1.0 Signed-off-by: Niranjan M.R <mniranja@redhat.com>

mrniranjan force-pushed the llc_odd_cpus branch from ae53b6c to b9c4461 Compare January 17, 2026 11:10

mrniranjan changed the title ~~AA: E2E: LLC: Add tests related to odd cpus~~ OCPBUGS-74027: AA: E2E: LLC: Add tests related to odd cpus Jan 17, 2026

openshift-ci-robot added jira/valid-reference Indicates that this PR references a valid Jira ticket of any type. jira/valid-bug Indicates that a referenced Jira bug is valid for the branch this PR is targeting. labels Jan 17, 2026

Tal-or reviewed Jan 19, 2026

View reviewed changes

Remove redundant check of requested cpus and restore initial profile

277b34d

Signed-off-by: Niranjan M.R <mniranja@redhat.com>

ffromani reviewed Jan 19, 2026

View reviewed changes

Move the code of checking Baremetal in BeforeAll section

553eae8

Signed-off-by: Niranjan M.R <mniranja@redhat.com>

OCPBUGS-74027: AA: E2E: LLC: Add tests related to odd cpus #1458

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mrniranjan commented Jan 17, 2026 •

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