GH-132532: Make CHECK_PERIODIC an instruction, not just a uop.#135772
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markshannon wants to merge 10 commits intopython:mainfrom
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GH-132532: Make CHECK_PERIODIC an instruction, not just a uop.#135772markshannon wants to merge 10 commits intopython:mainfrom
markshannon wants to merge 10 commits intopython:mainfrom
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Closing in favor of #137098 as that PR achieves the same result with no performance impact. |
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This is a reimplementation of #132533 (which I forgot about, sorry @iritkatriel) but with support for
CALL_KW,CALL_FUNCTION_EXand a tier2 version that doesn't escape.Initial benchmarking was about 0.5% slower across the platforms.
Stats showed that
CHECK_PERIODICwas 7.1% of all instructions.To mitigate this, this PR also:
CHECK_PERIODIChas been emitted in a basic block, and not emit it twice without an intervening call.CHECK_PERIODICinCALL_PY_EXACT_ARGSandCALL_PY_GENERALas they will have checked the eval breaker.CALL_LIST_APPENDto check the eval breaker or this loop might never check the eval breaker:📚 Documentation preview 📚: https://cpython-previews--135772.org.readthedocs.build/