CNF-25172: E2E: adjust timer_migration expectation for wrapped performance profiles - #1585
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WalkthroughThe performance test uses a bounded context, derives the performance profile name, lists Tuned profiles once, and validates ChangesPerformance profile validation
Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: 🔵 Low · up to The PR adjusts the timer_migration expectation for wrapped performance profiles, but the include traversal may miss a valid later branch and cause false test failures. The change is mergeable with explicit owner awareness or follow-up to make the traversal exhaustive. Suggested reviewers: Important Pre-merge checks failedPlease resolve all errors before merging. Addressing warnings is optional. ❌ Failed checks (2 warnings, 1 inconclusive)
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Actionable comments posted: 3
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Inline comments:
In `@test/e2e/performanceprofile/functests/1_performance/performance.go`:
- Around line 412-421: The kernel.timer_migration expectation must be derived
from profiles active on each workerRTNode, not all definitions returned by
tunedList. Update the logic around findProfilesWrappingTarget to reuse the
per-node Status.TunedProfile lookup from test 37127, or otherwise compute
sysctlMap separately for each active profile; do not let unused wrappers force
the expectation to “0”.
- Around line 1645-1651: Update profileIncludesTarget to traverse every profile
in includesMap rather than stopping after the first existing include; use DFS or
BFS with a visited set to prevent cycles, and return true whenever any include
branch reaches targetProfile so callers such as the wrapper-building loop handle
indirect matches correctly.
- Around line 401-403: Update the test beginning at the performance-profile test
function to create a bounded, cancellable context instead of context.TODO(), and
ensure that context is passed to every Kubernetes/client operation in the test.
Defer cancellation using the established context lifecycle pattern while
preserving the test’s existing behavior.
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test/e2e/performanceprofile/functests/1_performance/performance.go
Test 28466 hardcodes kernel.timer_migration=1 from the NTO openshift-node-performance profile. On clusters where ran-du-performance wraps the PP via include=, network-latency in the chain sets timer_migration=0 and that value wins over NTO's override to 1. Reuse the include-chain helpers from test 37127 to detect active Tuned wrapper profiles per node and expect timer_migration=0 when such a wrapper is present. Signed-off-by: Sargun Narula <snarula@redhat.com>
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| testlog.Infof("Node %s has active tuned profile: %q", node.Name, activeProfile) | ||
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| expectedTimerMigration := "1" | ||
| if activeProfile != performanceProfileName { |
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The logic of "ha, I see there is a Tuned override and for that reason timer_migration will be disabled" is not sound. The current version of RAN Tuned overrides does not do that for example (https://github.com/openshift-kni/telco-reference/blob/main/telco-ran/configuration/source-crs/node-tuning-operator/TunedPerformancePatch.yaml).
Also notice that in the previous version we actually enabled and disabled tuning migration based on workload hints even when the same set of Tuned objects were used.
If anything, you would have to parse all the included profiles and figure this out.
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"On clusters where ran-du-performance wraps the PP via include=, network-latency in the chain" - what does this mean? ran-du-performance is a higher priority profile and includes= the performance profile. network-latency is always in the chain as it is included by cpu-partitioning tuned profile here https://github.com/openshift/cluster-node-tuning-operator/blob/main/assets/performanceprofile/tuned/openshift-node-performance#L18 and https://github.com/redhat-performance/tuned/blob/master/profiles/cpu-partitioning/tuned.conf#L6 Both the logic and the explanation are confusing to me. |
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Test 28466 hardcodes
kernel.timer_migration=1from the NTOopenshift-node-performance profile. On clusters where ran-du-performance wraps the PP viainclude=, network-latency in the chain setstimer_migration=0and that value wins over NTO's override to 1.Reuse the include-chain helpers from test 37127 to detect wrapper Tuned profiles and
expect timer_migration=0when a wrapper is present.Summary by CodeRabbit