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GeezerVison is showing github.com — expose platform-specific `PRIO_DARWIN_*` constants for core type selection on macOS in `os` module. · Issue #103545 · python/cpython

expose platform-specific PRIO_DARWIN_* constants for core type selection on macOS in os module. #103545

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expose platform-specific PRIO_DARWIN_* constants for core type selection on macOS in os module.#103545
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OS-mactype-featureA feature request or enhancementA feature request or enhancement

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opened on Apr 14, 2023
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Feature or enhancement

As described in this stack overflow answer, the way to select "efficiency" vs. "performance" cores on Apple Silicon macOS machines is to use setpriority. However, you need to use custom platform-specific constants to do this, specifically, PRIO_DARWIN_BG, and either PRIO_DARWIN_THREAD or PRIO_DARWIN_PROCESS.

Pitch

It's just a few integer constants and it would expose a pretty important bit of power-efficiency/performance-tuning functionality for Python.

Previous discussion

No previous discussion anywhere, this seems like a fairly minor addition. This platform-specific functionality seems consistent with the way these functions are already treated, given that os.PRIO_* are already "Unix, not Emscripten, not WASI".

Linked PRs

  • GH-103545: Add macOS specific constants for os.setpriority to os #104606
Reacted by Ronald Oussoren and Jelle Zijlstra

Activity

  1. glyph
    added
    type-featureA feature request or enhancementA feature request or enhancement
    on Apr 14, 2023
  2. zware
    added
    OS-mac
    on Apr 14, 2023
  3. ronaldoussoren
    added 2 commits that reference this issue on May 18, 2023

    pythonGH-103545: Add macOS specific constants for ``os.setpriority`` …

    3212cf8

    GH-103545: Add macOS specific constants for ``os.setpriority`` to ``o…

    616fcad

  4. ronaldoussoren commented on May 19, 2023

    @ronaldoussoren
    ronaldoussoren
    on May 19, 2023
    Contributor
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    Thanks for the report.

    The constants will be in 3.12. The PR cannot be back ported to older releases because this changes the API of the os module.

  5. ronaldoussoren
    closed this as completedon May 19, 2023
  6. carljm
    added a commit that references this issue on May 20, 2023

    Merge branch 'main' into gsallam/main

    ea5965a
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