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Add and remove CPU from epoch computation on active and idle #3920

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Add and remove CPU from epoch computation on active and idle #3920

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@Alan-Jowett Alan-Jowett commented Oct 8, 2024 •
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Description

Restore the changes reverted by 205802b and fix a bug that was causing use after free (the for loop for computing oldest epoch was malformed resulting in a no-op).

Note: This is intentionally three or more commits:

  1. Restore the reverted code (including the bug).
  2. Fix the bug.
  3. PR feedback and addition of new tests.

Testing

CI/CD + 24 hour run of api_test.exe (previously failing after 2 hours).

Documentation

Yes, in the files.

Installation

No.

Add qodo agent
d8904b5 
Signed-off-by: Alan Jowett <[email protected]>
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@CodiumAI-Agent /review

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CodiumAI-Agent commented Oct 8, 2024 •
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PR Reviewer Guide 🔍

(Review updated until commit af048fb)

Here are some key observations to aid the review process:

⏱️ Estimated effort to review: 4 🔵🔵🔵🔵⚪
🧪 PR contains tests
🔒 No security concerns identified
⚡ Recommended focus areas for review

Thread Safety
The code modifies shared state without sufficient synchronization mechanisms in several places, which could lead to race conditions or data corruption in a multi-threaded environment.

Resource Leak
The new implementation introduces potential resource leaks where allocated resources on error paths are not always properly freed or handled.

Error Handling
Error paths may not correctly restore previous states, potentially leaving the system in an inconsistent state after an error.

dthaler
dthaler reviewed Oct 8, 2024
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dthaler
dthaler reviewed Oct 8, 2024
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@Alan-Jowett Alan-Jowett force-pushed the cpu_activation branch 6 times, most recently from 7b60ca4 to 6dfd02b Compare October 9, 2024 18:24
hawkinsw
hawkinsw reviewed Oct 10, 2024
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I hope that what I wrote isn't too annoying.

libs/runtime/unit/platform_unit_test.cpp Outdated Show resolved Hide resolved
@Alan-Jowett Alan-Jowett marked this pull request as ready for review October 10, 2024 04:11
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I hope that what I wrote isn't too annoying.

No, I loved it. I dislike that en-gb and en-us differ like this :-P

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Persistent review updated to latest commit af048fb

dthaler
dthaler reviewed Oct 10, 2024
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Alan Jowett and others added 4 commits October 10, 2024 11:37
PR feedback and new tests
67c2b73 
Signed-off-by: Alan Jowett <[email protected]>
PR feedback
59df12a 
Signed-off-by: Alan Jowett <[email protected]>
PR feedback
cb9897b 
Signed-off-by: Alan Jowett <[email protected]>
@Alan-Jowett @dthaler
Apply suggestions from code review
ec2fe66 
Co-authored-by: Dave Thaler <[email protected]>
Fix build break
0bb37d0 
Signed-off-by: Alan Jowett <[email protected]>
@Alan-Jowett Alan-Jowett marked this pull request as draft October 16, 2024 22:14
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Converting to draft until usersim bug is fixed.

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