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gh-99113: A Per-Interpreter GIL! #104210

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ericsnowcurrently
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@ericsnowcurrently ericsnowcurrently commented May 5, 2023

This is the culmination of PEP 684 (and of my 8-year long multi-core Python project)!

Each subinterpreter may now be created with its own GIL (via Py_NewInterpreterFromConfig()). If not so configured then the interpreter will share with the main interpreter--the status quo since the subinterpreters were added decades ago. The main interpreter always has its own GIL and subinterpreters from Py_NewInterpreter() will always share with the main interpreter.

(FYI, I've split up the original gh-99114 into multiple PRs, with this one being the final one in the chain.)

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🤖 New build scheduled with the buildbot fleet by @ericsnowcurrently for commit 289d050 🤖

If you want to schedule another build, you need to add the 🔨 test-with-buildbots label again.

@bedevere-bot bedevere-bot removed the 🔨 test-with-buildbots Test PR w/ buildbots; report in status section label May 6, 2023
@ericsnowcurrently ericsnowcurrently marked this pull request as ready for review May 6, 2023 22:03
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FYI, there are plenty of little things to clean up after this lands, particularly for PEP 684. There are also some corner-case crashes I need to chase down, related to extreme races.

Also, I still can't believe I've finally reached this point with this project!!! 😭

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@erlend-aasland erlend-aasland left a comment

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LGTM 🎉 BTW, I think the massive top-level comment in Python/ceval_gil.c needs an overhaul now.

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@kumaraditya303 kumaraditya303 left a comment

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LGTM is short for the amount of effort you put into it.

@ericsnowcurrently ericsnowcurrently merged commit 5c9ee49 into python:main May 8, 2023
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Thanks for all the great work and support, everyone!

There are plenty of small things to wrap up, but this is definitely the climax.

carljm added a commit to carljm/cpython that referenced this pull request May 9, 2023
* main: (47 commits)
  pythongh-97696 Remove unnecessary check for eager_start kwarg (python#104188)
  pythonGH-104308: socket.getnameinfo should release the GIL (python#104307)
  pythongh-104310: Add importlib.util.allowing_all_extensions() (pythongh-104311)
  pythongh-99113: A Per-Interpreter GIL! (pythongh-104210)
  pythonGH-104284: Fix documentation gettext build (python#104296)
  pythongh-89550: Buffer GzipFile.write to reduce execution time by ~15% (python#101251)
  pythongh-104223: Fix issues with inheriting from buffer classes (python#104227)
  pythongh-99108: fix typo in Modules/Setup (python#104293)
  pythonGH-104145: Use fully-qualified cross reference types for the bisect module (python#104172)
  pythongh-103193: Improve `getattr_static` test coverage (python#104286)
  Trim trailing whitespace and test on CI (python#104275)
  pythongh-102500: Remove mention of bytes shorthand (python#104281)
  pythongh-97696: Improve and fix documentation for asyncio eager tasks (python#104256)
  pythongh-99108: Replace SHA3 implementation HACL* version (python#103597)
  pythongh-104273: Remove redundant len() calls in argparse function (python#104274)
  pythongh-64660: Don't hardcode Argument Clinic return converter result variable name (python#104200)
  pythongh-104265 Disallow instantiation of `_csv.Reader` and `_csv.Writer` (python#104266)
  pythonGH-102613: Improve performance of `pathlib.Path.rglob()` (pythonGH-104244)
  pythongh-103650: Fix perf maps address format (python#103651)
  pythonGH-89812: Churn `pathlib.Path` methods (pythonGH-104243)
  ...
carljm added a commit to carljm/cpython that referenced this pull request May 9, 2023
* main: (29 commits)
  pythongh-104276: Make `_struct.unpack_iterator` type use type flag instead of custom constructor (python#104277)
  pythongh-97696: Move around and update the whatsnew entry for asyncio eager task factory (python#104298)
  pythongh-103193: Fix refleaks in `test_inspect` and `test_typing` (python#104320)
  require-pr-label.yml: Add missing "permissions:" (python#104309)
  pythongh-90656: Add platform triplets for 64-bit LoongArch (LA64) (python#30939)
  pythongh-104180: Read SOCKS proxies from macOS System Configuration (python#104181)
  pythongh-97696 Remove unnecessary check for eager_start kwarg (python#104188)
  pythonGH-104308: socket.getnameinfo should release the GIL (python#104307)
  pythongh-104310: Add importlib.util.allowing_all_extensions() (pythongh-104311)
  pythongh-99113: A Per-Interpreter GIL! (pythongh-104210)
  pythonGH-104284: Fix documentation gettext build (python#104296)
  pythongh-89550: Buffer GzipFile.write to reduce execution time by ~15% (python#101251)
  pythongh-104223: Fix issues with inheriting from buffer classes (python#104227)
  pythongh-99108: fix typo in Modules/Setup (python#104293)
  pythonGH-104145: Use fully-qualified cross reference types for the bisect module (python#104172)
  pythongh-103193: Improve `getattr_static` test coverage (python#104286)
  Trim trailing whitespace and test on CI (python#104275)
  pythongh-102500: Remove mention of bytes shorthand (python#104281)
  pythongh-97696: Improve and fix documentation for asyncio eager tasks (python#104256)
  pythongh-99108: Replace SHA3 implementation HACL* version (python#103597)
  ...
carljm added a commit to carljm/cpython that referenced this pull request May 9, 2023
* main: (156 commits)
  pythongh-97696 Add documentation for get_coro() behavior with eager tasks (python#104304)
  pythongh-97933: (PEP 709) inline list/dict/set comprehensions (python#101441)
  pythongh-99889: Fix directory traversal security flaw in uu.decode() (python#104096)
  pythongh-104184: fix building --with-pydebug --enable-pystats (python#104217)
  pythongh-104139: Add itms-services to uses_netloc urllib.parse. (python#104312)
  pythongh-104240: return code unit metadata from codegen (python#104300)
  pythongh-104276: Make `_struct.unpack_iterator` type use type flag instead of custom constructor (python#104277)
  pythongh-97696: Move around and update the whatsnew entry for asyncio eager task factory (python#104298)
  pythongh-103193: Fix refleaks in `test_inspect` and `test_typing` (python#104320)
  require-pr-label.yml: Add missing "permissions:" (python#104309)
  pythongh-90656: Add platform triplets for 64-bit LoongArch (LA64) (python#30939)
  pythongh-104180: Read SOCKS proxies from macOS System Configuration (python#104181)
  pythongh-97696 Remove unnecessary check for eager_start kwarg (python#104188)
  pythonGH-104308: socket.getnameinfo should release the GIL (python#104307)
  pythongh-104310: Add importlib.util.allowing_all_extensions() (pythongh-104311)
  pythongh-99113: A Per-Interpreter GIL! (pythongh-104210)
  pythonGH-104284: Fix documentation gettext build (python#104296)
  pythongh-89550: Buffer GzipFile.write to reduce execution time by ~15% (python#101251)
  pythongh-104223: Fix issues with inheriting from buffer classes (python#104227)
  pythongh-99108: fix typo in Modules/Setup (python#104293)
  ...
carljm added a commit to carljm/cpython that referenced this pull request May 9, 2023
* main: (35 commits)
  pythongh-97696 Add documentation for get_coro() behavior with eager tasks (python#104304)
  pythongh-97933: (PEP 709) inline list/dict/set comprehensions (python#101441)
  pythongh-99889: Fix directory traversal security flaw in uu.decode() (python#104096)
  pythongh-104184: fix building --with-pydebug --enable-pystats (python#104217)
  pythongh-104139: Add itms-services to uses_netloc urllib.parse. (python#104312)
  pythongh-104240: return code unit metadata from codegen (python#104300)
  pythongh-104276: Make `_struct.unpack_iterator` type use type flag instead of custom constructor (python#104277)
  pythongh-97696: Move around and update the whatsnew entry for asyncio eager task factory (python#104298)
  pythongh-103193: Fix refleaks in `test_inspect` and `test_typing` (python#104320)
  require-pr-label.yml: Add missing "permissions:" (python#104309)
  pythongh-90656: Add platform triplets for 64-bit LoongArch (LA64) (python#30939)
  pythongh-104180: Read SOCKS proxies from macOS System Configuration (python#104181)
  pythongh-97696 Remove unnecessary check for eager_start kwarg (python#104188)
  pythonGH-104308: socket.getnameinfo should release the GIL (python#104307)
  pythongh-104310: Add importlib.util.allowing_all_extensions() (pythongh-104311)
  pythongh-99113: A Per-Interpreter GIL! (pythongh-104210)
  pythonGH-104284: Fix documentation gettext build (python#104296)
  pythongh-89550: Buffer GzipFile.write to reduce execution time by ~15% (python#101251)
  pythongh-104223: Fix issues with inheriting from buffer classes (python#104227)
  pythongh-99108: fix typo in Modules/Setup (python#104293)
  ...
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4 participants