gh-142048: Fix lost allocations on thread cleanup#142233
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kumaraditya303 merged 2 commits intopython:mainfrom Dec 10, 2025
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gh-142048: Fix lost allocations on thread cleanup#142233kumaraditya303 merged 2 commits intopython:mainfrom
kumaraditya303 merged 2 commits intopython:mainfrom
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kevmo314
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kevmo314
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Dec 3, 2025
| // Flush the thread's local GC allocation count to the global count | ||
| // before the thread state is cleared, otherwise the count is lost. | ||
| _PyThreadStateImpl *tstate_impl = (_PyThreadStateImpl *)tstate; | ||
| _Py_atomic_add_int(&tstate->interp->gc.young.count, |
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Since this is less common perhaps it's ok to allow the global GC count to go negative here? The compare-and-exchange loop is more accurate though, I can update to use that if preferred.
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Yeah, I think going negative here is fine
colesbury
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Dec 4, 2025
kumaraditya303
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Dec 10, 2025
kumaraditya303
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needs backport to 3.13
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Thanks @kevmo314 for the PR, and @kumaraditya303 for merging it 🌮🎉.. I'm working now to backport this PR to: 3.13, 3.14. |
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…honGH-142233) (cherry picked from commit 49b1fb4) Co-authored-by: Kevin Wang <kevmo314@gmail.com>
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Sorry, @kevmo314 and @kumaraditya303, I could not cleanly backport this to |
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GH-142504 is a backport of this pull request to the 3.14 branch. |
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GH-142506 is a backport of this pull request to the 3.13 branch. |
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…up (pythonGH-142233) (cherry picked from commit 49b1fb4) Co-authored-by: Kevin Wang <kevmo314@gmail.com>
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…up (pythonGH-142233) (cherry picked from commit 49b1fb4) Co-authored-by: Kevin Wang <kevmo314@gmail.com>
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Fixes some lost allocation counts in the local allocation counters when threads are cleaned up.