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[release-4.16] WIP: NOMERGE: DNM: consume u/s LLC alignment support #2159

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[release-4.16] WIP: NOMERGE: DNM: consume u/s LLC alignment support #2159

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WIP DNM

#2128 is the old snapshot
this is the straight backport of #2136 and #2130 to 4.16

sphrasavath and others added 4 commits November 6, 2024 17:28
@sphrasavath @ffromani
Add takeByTopologyUnCoreCachePacked if policy option align-cpus-by-u…
46dc787 
…ncorecache is enabled.

 Adding new function to evaluate uncore cache id. Reverse allocation logic.
 Implement preferAlignByUncorecache within TakeByTopologyNUMAPacked, along with new test cases.

(cherry picked from commit 3f459f2)
@wongchar @ffromani
update comments
c52de76 
(cherry picked from commit b86eb19)
@ffromani
UPSTREAM: <carry>: adapt to the old API
10bf2a2 
update code and tests to work with older codebase.

This PR can be dropped when we rebase.

Signed-off-by: Francesco Romani <[email protected]>
@ffromani
UPSTREAM: <carry>: require configuration file enablement
56ccd81 
similarly to what we do for the managed CPU (aka workload partitioning)
feature, introduce a master configuration file
`/etc/kubernetes/openshift-llc-alignment` which needs to be present for
the LLC alignment feature to be activated, in addition to the policy
option being required.

Note this replace the standard upstream feature gate check.

This can be dropped when the feature per  KEP
kubernetes/enhancements#4800 goes beta.

Signed-off-by: Francesco Romani <[email protected]>
@openshift-ci-robot openshift-ci-robot added the backports/unvalidated-commits Indicates that not all commits come to merged upstream PRs. label Dec 10, 2024
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@ffromani: the contents of this pull request could not be automatically validated.

The following commits could not be validated and must be approved by a top-level approver:

Comment /validate-backports to re-evaluate validity of the upstream PRs, for example when they are merged upstream.

@openshift-ci openshift-ci bot requested review from rphillips and sjenning December 10, 2024 14:35
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openshift-ci bot commented Dec 10, 2024

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: ffromani
Once this PR has been reviewed and has the lgtm label, please assign mrunalp for approval. For more information see the Kubernetes Code Review Process.

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openshift-ci bot commented Dec 10, 2024

@ffromani: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name Commit Details Required Rerun command
ci/prow/verify 56ccd81 link true /test verify
ci/prow/e2e-agnostic-ovn-cmd 56ccd81 link false /test e2e-agnostic-ovn-cmd
ci/prow/unit 56ccd81 link true /test unit

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@rphillips rphillips Awaiting requested review from rphillips

@sjenning sjenning Awaiting requested review from sjenning

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@ffromani @openshift-ci-robot @sphrasavath @wongchar