gh-130313: Avoid locking when clearing objects #130126
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DinoV
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mpage
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Feb 19, 2025
colesbury
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Feb 19, 2025
colesbury
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Feb 20, 2025
Objects/dictobject.c
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| clear_inline_values(PyDictValues *values) | ||
| { | ||
| if (values->valid) { | ||
| values->valid = 0; |
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Does this need to be FT_ATOMIC_STORE_UINT8(values->valid, 0) for the call from set_dict_inline_values?
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There's no need for us to lock the object when clearing the managed dict. We may need to lock the dict if it's been materialized and points to external objects as we could be doing a simple free of the object while other things refer to the dict.
This requires us to relax an assert because we clear objects after we've restarted the world. But we're past the point of resurrection so no one else can be referring to this object.
https://github.com/facebookexperimental/free-threading-benchmarking/tree/main/results/bm-20250214-3.14.0a5+-c00cd86-NOGIL