OCPBUGS-105458: Use Add() instead of AddRateLimited() for routine Profile enqueues - #1584
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Change 1: workqueue.DefaultTypedControllerRateLimiter's AddRateLimited() draws from a single 10qps/burst-100 token bucket shared by every item in the queue, regardless of kind or key. Cascade/trigger enqueues (Pod/Node change to Profile update, per-Profile bootstrap loop, initial bootstrap event) used AddRateLimited() for ordinary enqueuing rather than error retries. During a burst of ~100 nodes joining, this exhausted the shared bucket, delaying later Profile syncs by minutes even though they were never dropped, just queued behind the backlog. Switch these call sites to Add(), which is unthrottled and still deduped by key via the delaying queue's dirty set. Keep AddRateLimited() only for its intended purpose: the retry-after- sync()-error path, where per-key exponential backoff is correct. Change 2: validateTunedCRs() called UpdateStatus() on every Tuned CR on every invocation, even when the computed status conditions were identical to what's already stored. Compare the newly computed status against the cached copy with reflect.DeepEqual() and skip the UpdateStatus() call when nothing semantically changed. Resolves: OCPBUGS-105458
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WalkthroughThe operator now centralizes Profile queue insertion. New events are immediate, while pending retries keep rate-limited backoff. Tuned status validation now skips semantically unchanged status updates. ChangesOperator reconciliation
Estimated code review effort: 2 (Simple) | ~10 minutes Mergeability Score: 🟠 High · up to Retry scheduling can still count repeated Profile events as failures while a retry is pending, potentially exhausting the retry limit and causing a failed sync to drop a stale Profile. Merge should be blocked until duplicate retry scheduling is prevented or retry state is tracked separately. Suggested reviewers: 🚥 Pre-merge checks | ✅ 15✅ Passed checks (15 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
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/test all |
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PR Summary by QodoAvoid global workqueue throttling for Profile enqueues; skip no-op Tuned status writes
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Code Review by Qodo
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/test all |
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/cc @MarSik |
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Inline comments:
In `@pkg/operator/controller.go`:
- Around line 474-480: Update Controller.enqueueProfile so delayed retry state
is tracked separately from the workqueue rate limiter’s failure count,
preventing repeated events for the same wqKey from invoking AddRateLimited while
a retry is already pending. Preserve retry counting based only on sync failures,
and add a regression test covering repeated events during the retry delay.
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pkg/operator/controller.go
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[APPROVALNOTIFIER] This PR is APPROVED This pull-request has been approved by: jmencak, MarSik The full list of commands accepted by this bot can be found here. The pull request process is described here DetailsNeeds approval from an approver in each of these files:
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Scheduling required tests: |
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@jmencak: This pull request references Jira Issue OCPBUGS-105458, which is invalid:
Comment The bug has been updated to refer to the pull request using the external bug tracker. DetailsIn response to this:
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@jmencak: This pull request references Jira Issue OCPBUGS-105458, which is invalid:
Comment DetailsIn response to this:
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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@jmencak: This pull request references Jira Issue OCPBUGS-105458, which is valid. The bug has been moved to the POST state. 3 validation(s) were run on this bug
DetailsIn response to this:
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/retest |
2 similar comments
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/retest |
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/retest |
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/retest-required |
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Let's debug in the CI: |
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/test e2e-gcp-pao |
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PR-Agent: could not find a component named |
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/retest |
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/test all |
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PR-Agent: could not find a component named |
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/test e2e-gcp-pao-updating-profile |
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PR-Agent: could not find a component named |
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/verified by @shyadav10 |
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@shyadav10: This PR has been marked as verified by DetailsIn response to this:
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@jmencak: all tests passed! Full PR test history. Your PR dashboard. DetailsInstructions 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 kubernetes-sigs/prow repository. I understand the commands that are listed here. |
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@jmencak: Jira Issue Verification Checks: Jira Issue OCPBUGS-105458 Jira Issue OCPBUGS-105458 has been moved to the MODIFIED state and will move to the VERIFIED state when the change is available in an accepted nightly payload. 🕓 DetailsIn response to this:
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/cherry-pick release-5.0 |
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@jmencak: new pull request created: #1595 DetailsIn response to this:
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Change 1:
workqueue.DefaultTypedControllerRateLimiter's AddRateLimited() draws from a single 10qps/burst-100 token bucket shared by every item in the queue, regardless of kind or key. Cascade/trigger enqueues (Pod/Node change to Profile update, per-Profile bootstrap loop, initial bootstrap event) used AddRateLimited() for ordinary enqueuing rather than error retries. During a burst of ~100 nodes joining, this exhausted the shared bucket, delaying later Profile syncs by minutes even though they were never dropped, just queued behind the backlog.
Switch these call sites to Add(), which is unthrottled and still deduped by key via the delaying queue's dirty set. Keep AddRateLimited() only for its intended purpose: the retry-after- sync()-error path, where per-key exponential backoff is correct.
Change 2:
validateTunedCRs() called UpdateStatus() on every Tuned CR on every invocation, even when the computed status conditions were identical to what's already stored. Compare the newly computed status against the cached copy with reflect.DeepEqual() and skip the UpdateStatus() call when nothing semantically changed.
Resolves: OCPBUGS-105458
Summary by CodeRabbit
Performance
Bug Fixes