koordlet: fix cpi collector return value sequence

[songtao98]

Signed-off-by: songtao98 songtao2603060@gmail.com

Ⅰ. Describe what this PR does

Previously the cpi collector utils has a return value sequence bug, which reverses the sequence of cycles and instructions , leading that when compute CPI we actually get the reciprocal of it.

Ⅱ. Does this pull request fix one issue?

Ⅲ. Describe how to verify it

Ⅳ. Special notes for reviews

V. Checklist

• I have written necessary docs and comments
• I have added necessary unit tests and integration tests
• All checks passed in make test

[zwzhang0107]

/lgtm

[zwzhang0107]

/approve

[koordinator-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: zwzhang0107

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[codecov]

Codecov Report

Base: 66.63% // Head: 66.64% // Increases project coverage by +0.00% 🎉

Coverage data is based on head (93071e9) compared to base (0a02d28).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #909   +/-   ##
=======================================
  Coverage   66.63%   66.64%           
=======================================
  Files         238      238           
  Lines       27675    27682    +7     
=======================================
+ Hits        18442    18449    +7     
  Misses       7965     7965           
  Partials     1268     1268           

Flag	Coverage Δ
unittests	66.64% <100.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/koordlet/util/perf/perf_linux.go	50.00% <100.00%> (ø)
pkg/scheduler/plugins/reservation/rcache.go	89.16% <0.00%> (+0.09%)	⬆️
pkg/scheduler/plugins/reservation/hook.go	79.16% <0.00%> (+0.63%)	⬆️

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