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gh-109039: Branch prediction for Tier 2 interpreter #109038

Merged
merged 17 commits into from
Sep 11, 2023
Merged

gh-109039: Branch prediction for Tier 2 interpreter #109038

merged 17 commits into from
Sep 11, 2023

Commits on Sep 6, 2023

  1. inst() and macro() may need cache size metadata

    @gvanrossum
    gvanrossum committed Sep 6, 2023
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  2. Add cache entry to *POP_JUMP_IF_* instructions

    @gvanrossum
    gvanrossum committed Sep 6, 2023
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Commits on Sep 7, 2023

  1. Fix test_dis (also fixes test_peepholer)

    @gvanrossum
    gvanrossum committed Sep 7, 2023
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  2. Fix test_monitoring

    @gvanrossum
    gvanrossum committed Sep 7, 2023
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  3. Include pycore_bitutils.h in instrumentation.c

    @gvanrossum
    gvanrossum committed Sep 7, 2023
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  4. Follow likely jumps in trace

    @gvanrossum
    gvanrossum committed Sep 7, 2023
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  5. Merge remote-tracking branch 'upstream/main' into count-branches

    @gvanrossum
    gvanrossum committed Sep 7, 2023
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  6. Require 16 iterations before optimizing 

    This is needed so branch prediction can work.
    @gvanrossum
    gvanrossum committed Sep 7, 2023
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  7. Fix existing uops tests

    @gvanrossum
    gvanrossum committed Sep 7, 2023
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  8. Add test for branch prediction

    @gvanrossum
    gvanrossum committed Sep 7, 2023
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  9. Initialize POP_JUMP_IF* counters to 0x5555

    @gvanrossum
    gvanrossum committed Sep 7, 2023
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Commits on Sep 8, 2023

  1. Update counter in INSTRUMENTED_POP_JUMP_IF_FALSE 

    Alas, this goes untested (how to test it?).

In INSTRUMENTED_POP_JUMP_IF_NOT_NONE, rename flag to nflag
to emphasise that its sense is reversed (this is the only op
that jumps if the flag is false, because there's no
Py_IsNotNone() function). (Alternatively, we could have changed
the sense of the flag, but that would have been more work.)
    @gvanrossum
    gvanrossum committed Sep 8, 2023
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  2. Simplify writing of _PyOpcode_Caches

    @gvanrossum
    gvanrossum committed Sep 8, 2023
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  3. Fix test_huntrleaks under -Xuops 

    This time by disabling the optimizer.
    @gvanrossum
    gvanrossum committed Sep 8, 2023
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  4. Fix test_dis under -Xuops

    @gvanrossum
    gvanrossum committed Sep 8, 2023
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Commits on Sep 11, 2023

  1. Merge branch 'main' into count-branches

    @gvanrossum
    gvanrossum committed Sep 11, 2023
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  2. Update magic number

    @gvanrossum
    gvanrossum committed Sep 11, 2023
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