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Title: GH-109369: Add machinery for deoptimizing tier2 executors, both individually and globally. by markshannon · Pull Request #110384 · python/cpython · GitHub

Open Graph Title: GH-109369: Add machinery for deoptimizing tier2 executors, both individually and globally. by markshannon · Pull Request #110384 · python/cpython

X Title: GH-109369: Add machinery for deoptimizing tier2 executors, both individually and globally. by markshannon · Pull Request #110384 · python/cpython

Description: This PR just provides the machinery; we still need to add support for exiting executors when their valid flag is falsified. The implementation uses a bloom filter. The advantage of a bloom filter is that it requires no coupling between the executors and the objects they depend on, plus it is simpler to implement and uses less memory than a precise mapping. I've chosen k = 6 and m = 256. This should give a low enough false positive rate for most cases. We want to keep the false positive rate very low, as spurious de-optimizations could be expensive. Issue: gh-109369

Open Graph Description: This PR just provides the machinery; we still need to add support for exiting executors when their valid flag is falsified. The implementation uses a bloom filter. The advantage of a bloom filter i...

X Description: This PR just provides the machinery; we still need to add support for exiting executors when their valid flag is falsified. The implementation uses a bloom filter. The advantage of a bloom filter i...

Opengraph URL: https://github.com/python/cpython/pull/110384

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GH-109369: Add machinery for deoptimizing tier2 executors, both individually and globally. https://github.com/python/cpython/pull/110384/files#top
Show all changes 11 commits https://github.com/python/cpython/pull/110384/files
dd606ae Add valid flag to executor objects markshannon Sep 28, 2023 https://github.com/python/cpython/pull/110384/commits/dd606ae1965e320a80e95dea46ca4fbb8b18284b
45c30d3 Add ability to invalidate executors as a result of changes to other o… markshannon Oct 1, 2023 https://github.com/python/cpython/pull/110384/commits/45c30d369ea9c96e33aa3d288a34782f662094f0
30844bb Merge branch 'main' into tier2-deopt markshannon Oct 2, 2023 https://github.com/python/cpython/pull/110384/commits/30844bbff782fa34c82365e8f7c5b748eeb18b88
79bda49 Remove unrelated change markshannon Oct 4, 2023 https://github.com/python/cpython/pull/110384/commits/79bda49a5bc2534bed6b2fd7e59161ebcddb6f12
76dad94 Tidier logic and add explanatory comment markshannon Oct 4, 2023 https://github.com/python/cpython/pull/110384/commits/76dad942cdfaf3baa224048517dc56053e4405e0
02201f2 Merge branch 'main' into tier2-deopt markshannon Oct 4, 2023 https://github.com/python/cpython/pull/110384/commits/02201f277bdd0bfc79399b29e2ded4b4672f390f
60306d8 Tidy up code and add test markshannon Oct 4, 2023 https://github.com/python/cpython/pull/110384/commits/60306d818b2e3b1ff2d4d87865762964c9bf23a1
0436c1a Remove _JUMP_IF_INVALID. Save for next PR. markshannon Oct 5, 2023 https://github.com/python/cpython/pull/110384/commits/0436c1aeca5847fed2c4c6aa7a21d2b4018fc33e
77ef658 Address some review comments markshannon Oct 23, 2023 https://github.com/python/cpython/pull/110384/commits/77ef6581d27824f9ea98bbb54a35d7418e1ad1f7
41f54b8 Use a single 64 bit hash function and more clearly document how the b… markshannon Oct 23, 2023 https://github.com/python/cpython/pull/110384/commits/41f54b8b1bab830b3b5b9076b463db4225ed9fbf
11985ea Fix unlinking of executors markshannon Oct 23, 2023 https://github.com/python/cpython/pull/110384/commits/11985eaea519d2a4bb7d206152edf5f2db9fd625
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