Mailing List Archive: [issue45256] Remove the usage of the cstack in Python to Python calls

[issue45256] Remove the usage of the cstack in Python to Python calls

Sep 21, 2021, 3:41 AM

Post #1 of 7 (18 views)

New submission from Pablo Galindo Salgado <pablogsal@gmail.com>:

Removing the usage of the C stack in Python-to-Python calls will allow future optimizations in the eval loop to take place and can yield some speed ups given that we will be removing C function calls and preambles by inlining the callee in the same eval loop as the caller.

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messages: 402311
nosy: Mark.Shannon, pablogsal
priority: normal
severity: normal
status: open
title: Remove the usage of the cstack in Python to Python calls
versions: Python 3.11

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[issue45256] Remove the usage of the cstack in Python to Python calls [ In reply to ]

Sep 21, 2021, 3:42 AM

Post #2 of 7 (18 views)

Change by Pablo Galindo Salgado <pablogsal@gmail.com>:

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keywords: +patch
pull_requests: +26884
stage: -> patch review
pull_request: https://github.com/python/cpython/pull/28488

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[issue45256] Remove the usage of the cstack in Python to Python calls [ In reply to ]

Sep 21, 2021, 7:47 AM

Post #3 of 7 (18 views)

Change by Ken Jin <kenjin4096@gmail.com>:

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nosy: +kj

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[issue45256] Remove the usage of the cstack in Python to Python calls [ In reply to ]

Sep 22, 2021, 5:24 AM

Post #4 of 7 (18 views)

Change by Dong-hee Na <donghee.na@python.org>:

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nosy: +corona10

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[issue45256] Remove the usage of the cstack in Python to Python calls [ In reply to ]

Sep 22, 2021, 5:52 AM

Post #5 of 7 (18 views)

Serhiy Storchaka <storchaka+cpython@gmail.com> added the comment:

AFAIK Mark Shannon proposed this idea, but it was rejected.

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nosy: +gvanrossum, serhiy.storchaka

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[issue45256] Remove the usage of the cstack in Python to Python calls [ In reply to ]

Sep 22, 2021, 6:04 AM

Post #6 of 7 (18 views)

Pablo Galindo Salgado <pablogsal@gmail.com> added the comment:

What was rejected was https://www.python.org/dev/peps/pep-0651/ which included this idea but had a lot more stuff in it. In particular, it was rejected because it gave semantics to overflow exceptions (two exceptions were proposed), new APIs and it had lack consistent guarantees for different platforms, among other considerations.

This version is just for optimization purposes with no changes in semantics.

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[issue45256] Remove the usage of the cstack in Python to Python calls [ In reply to ]

Sep 22, 2021, 7:07 AM

Post #7 of 7 (18 views)

Change by STINNER Victor <vstinner@python.org>:

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nosy: +vstinner

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