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GH-118093: Specialize CALL_KW #123006

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Merged
merged 12 commits into from
Aug 16, 2024
Merged

GH-118093: Specialize CALL_KW #123006

merged 12 commits into from
Aug 16, 2024

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markshannon
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@markshannon markshannon commented Aug 14, 2024 •
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According to our stats the CALL_KW opcode is one of the most common opcodes that prevents projection of tier 2 traces.
Making CALL_KW suitable for tier 2 is infeasible, but we can specialize it in tier 1 such that the specializations can be handled by tier 2.

This PR adds three specializations:

  • CALL_KW_PY for calls to Python functions
  • CALL_KW_BOUND_METHODS for calls to bound methods
  • CALL_KW_NON_PY for calls to everything else.

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markshannon commented Aug 15, 2024 •
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No impact on performance
Stats show 99.9% specialization with a low (<1%) miss rate.

Fidget-Spinner
Fidget-Spinner reviewed Aug 16, 2024
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Looks good in general. Two questions.

iritkatriel
iritkatriel approved these changes Aug 16, 2024
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@markshannon markshannon merged commit c13e7d9 into python:main Aug 16, 2024
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@markshannon markshannon deleted the specialize-call-kw branch August 16, 2024 16:12
jeremyhylton pushed a commit to jeremyhylton/cpython that referenced this pull request Aug 19, 2024
@markshannon @jeremyhylton
pythonGH-118093: Specialize CALL_KW (pythonGH-123006)
114fa0f
blhsing pushed a commit to blhsing/cpython that referenced this pull request Aug 22, 2024
@markshannon @blhsing
pythonGH-118093: Specialize CALL_KW (pythonGH-123006)
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@iritkatriel iritkatriel iritkatriel approved these changes

@Fidget-Spinner Fidget-Spinner Fidget-Spinner approved these changes

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@markshannon @iritkatriel @Fidget-Spinner