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Performance Checker Catches DispatchSemaphore Race #90

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daniapopov opened this issue Oct 12, 2023 · 0 comments
Open

Performance Checker Catches DispatchSemaphore Race #90

daniapopov opened this issue Oct 12, 2023 · 0 comments
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bug Something isn't working

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@daniapopov
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Expected Behavior

DispatchSemaphore seems like it isn't working as intended here
Relevant bug report in old SDK. But issue seems to persist here.

Current Behavior

It seems like there is a queue prioritization bug
Console output is:

Performance Checker: Thread running at QOS_CLASS_USER_INITIATED waiting on a lower QoS thread running at QOS_CLASS_UTILITY. Investigate ways to avoid priority inversions
image

Steps to Reproduce

Run in Xcode 15

Environment

  • SDK Version: v. 0.7.2
  • OS Version: MacOS 10.12.6 Monterey
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@daniapopov