bpo-41440: add os.cpu_count() support for VxWorks RTOS#21685

pxinwr · 2020-07-30T07:17:01Z

VxWorks RTOS provides API vxCpuEnabledGet() to get the set of running CPUs in the system. The return value of vxCpuEnabledGet() is the type cpuset_t defined as shown below. Every bit in the cpuset_t represents the individual CPU No. That is bit 0 corresponds to cpu0, bit 1 corresponds to cpu1, etc. So counting the ones count with __builtin_popcount will get the running CPU count.

typedef unsigned int cpuset_t;

https://bugs.python.org/issue41440

Modules/posixmodule.c

bedevere-bot · 2020-07-30T14:32:55Z

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pxinwr · 2020-07-31T06:02:53Z

I have made the requested changes; please review again

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corona10

nit change

Misc/NEWS.d/next/Library/2020-07-30-14-56-58.bpo-41440.rju34k.rst

bedevere-bot · 2020-07-31T06:59:38Z

A Python core developer has requested some changes be made to your pull request before we can consider merging it. If you could please address their requests along with any other requests in other reviews from core developers that would be appreciated.

Once you have made the requested changes, please leave a comment on this pull request containing the phrase I have made the requested changes; please review again. I will then notify any core developers who have left a review that you're ready for them to take another look at this pull request.

Co-authored-by: Dong-hee Na <donghee.na92@gmail.com>

pxinwr · 2020-07-31T08:24:16Z

I have made the requested changes; please review again

bedevere-bot · 2020-07-31T08:24:19Z

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Doc/whatsnew/3.10.rst

bedevere-bot · 2020-07-31T12:47:25Z

A Python core developer has requested some changes be made to your pull request before we can consider merging it. If you could please address their requests along with any other requests in other reviews from core developers that would be appreciated.

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This reverts commit 88e7cea.

pxinwr · 2020-08-01T13:48:11Z

I have made the requested changes; please review again

bedevere-bot · 2020-08-01T13:48:15Z

Thanks for making the requested changes!

@corona10: please review the changes made to this pull request.

Modules/posixmodule.c

Doc/whatsnew/3.10.rst

Co-authored-by: Victor Stinner <vstinner@python.org>

pxinwr · 2020-08-10T02:01:52Z

@corona10 Thanks for merging it.

add os.cpu_count() support for VxWorks RTOS
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replace __builtin_popcount with _Py_popcount32
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rerun the ci
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Revert "update What's New"
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This reverts commit 88e7cea.

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shihai1991 pushed a commit to shihai1991/cpython that referenced this pull request Aug 20, 2020
bpo-41440: add os.cpu_count() support for VxWorks RTOS (pythonGH-21685)
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xzy3 pushed a commit to xzy3/cpython that referenced this pull request Oct 18, 2020
bpo-41440: add os.cpu_count() support for VxWorks RTOS (pythonGH-21685)
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pxinwr deleted the fix-issue-31904-cpucount branch July 12, 2021 09:41

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bpo-41440: add os.cpu_count() support for VxWorks RTOS#21685

bpo-41440: add os.cpu_count() support for VxWorks RTOS #21685

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