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[release-1.16] Scheduler: LastOrdinal based on replicas instead of FreeCap #8394

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This is an automated cherry-pick of #8388


When scaling down and compacting, basing the last ordinal on the
free capacity structure leads to have a lastOrdinal off by one since
`FreeCap` might contain the free capacity for unschedulable pods.

We will have to continue including unschduelable pods in FreeCap
because it might happen that a pod becomes unscheduleble for external
reasons like node gets shutdown for pods with lower ordinals
and the pod need to be rescheduled and during that time period
we want to consider those when compacting; once all vpods that
were on that pod that is gone get rescheduled, FreeCap will only
include scheduleable pods.

Signed-off-by: Pierangelo Di Pilato <[email protected]>
@knative-prow knative-prow bot added the size/L Denotes a PR that changes 100-499 lines, ignoring generated files. label Dec 19, 2024
@knative-prow knative-prow bot requested review from aliok and creydr December 19, 2024 07:13
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codecov bot commented Dec 19, 2024

Codecov Report

Attention: Patch coverage is 87.50000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 64.98%. Comparing base (ee786ee) to head (b9404c3).
Report is 1 commits behind head on release-1.16.

Files with missing lines Patch % Lines
pkg/scheduler/state/state.go 90.00% 1 Missing and 1 partial ⚠️
pkg/scheduler/statefulset/autoscaler.go 75.00% 0 Missing and 1 partial ⚠️
Additional details and impacted files
@@              Coverage Diff              @@
##           release-1.16    #8394   +/-   ##
=============================================
  Coverage         64.97%   64.98%           
=============================================
  Files               359      359           
  Lines             22075    22061   -14     
=============================================
- Hits              14344    14336    -8     
+ Misses             6979     6974    -5     
+ Partials            752      751    -1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

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/lgtm

@knative-prow knative-prow bot added the lgtm Indicates that a PR is ready to be merged. label Dec 19, 2024
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knative-prow bot commented Dec 19, 2024

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Cali0707, knative-prow-robot

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@knative-prow knative-prow bot added the approved Indicates a PR has been approved by an approver from all required OWNERS files. label Dec 19, 2024
@knative-prow knative-prow bot merged commit 7da3cee into knative:release-1.16 Dec 19, 2024
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3 participants