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GeezerVison is showing github.com — gh-150114: Reduce memory usage of test_free_threading.test_iteration by colesbury · Pull Request #150115 · python/cpython

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@colesbury

@colesbury colesbury commented May 19, 2026 •
edited by bedevere-app Bot
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Reduce NUMITEMS from 100000 to 5000. Peak RSS for the full test_free_threading suite drops from ~850 MB to ~175 MB.

  • Issue: GitHub free threading CI failing with SIGTERM #150114

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@colesbury
pythongh-150114: Reduce memory usage of test_free_threading.test_iter…
8a0647f 
…ation

Reduce NUMITEMS from 100000 to 5000. Peak RSS for the full
test_free_threading suite drops from ~850 MB to ~175 MB.
@colesbury colesbury added tests Tests in the Lib/test dir topic-free-threading skip news labels May 19, 2026
@bedevere-app bedevere-app Bot mentioned this pull request May 19, 2026
GitHub free threading CI failing with SIGTERM #150114
Closed
@colesbury
colesbury marked this pull request as ready for review May 19, 2026 20:41
@bedevere-app bedevere-app Bot added the awaiting core review label May 19, 2026
@zooba

zooba commented May 19, 2026

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There's a resource for tests with lots of memory available that we could probably use here. Let me find a reference for you...
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@colesbury

colesbury commented May 19, 2026

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It's much more valuable to have the test run for fewer iterations in the GitHub CI than more iterations behind a memory resource guard.
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@zooba

zooba commented May 19, 2026

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Yeah, you're right. Also the test filter has changed since I last looked at it and doesn't really suit this kind of switch so well anymore.
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zooba
zooba approved these changes May 19, 2026
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@bedevere-app bedevere-app Bot added awaiting merge and removed awaiting core review labels May 19, 2026
@cmaloney

cmaloney commented May 19, 2026

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In addition to bigmemtest there is also an arbitrary "resource name" system (requires()). but also not well suited. 👍 to just reducing resource usage. Have restarted quite a few jobs with this error in the sprint.
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cmaloney
cmaloney approved these changes May 19, 2026
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@colesbury
colesbury merged commit 61f1221 into python:main May 19, 2026
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@bedevere-app bedevere-app Bot removed the awaiting merge label May 19, 2026
@colesbury colesbury added awaiting merge needs backport to 3.14 bugs and security fixes needs backport to 3.15 bugs and security fixes labels May 19, 2026
@miss-islington-app

miss-islington-app Bot commented May 19, 2026

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Thanks @colesbury for the PR 🌮🎉.. I'm working now to backport this PR to: 3.14.
🐍🍒⛏🤖
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@miss-islington-app

miss-islington-app Bot commented May 19, 2026

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Thanks @colesbury for the PR 🌮🎉.. I'm working now to backport this PR to: 3.15.
🐍🍒⛏🤖
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@colesbury
colesbury deleted the gh-150114-reduce-test-iteration-memory branch May 19, 2026 21:37
@colesbury colesbury removed the awaiting merge label May 19, 2026
@bedevere-app

bedevere-app Bot commented May 19, 2026

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GH-150124 is a backport of this pull request to the 3.15 branch.
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@bedevere-app

bedevere-app Bot commented May 19, 2026

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GH-150123 is a backport of this pull request to the 3.14 branch.
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@bedevere-app bedevere-app Bot removed needs backport to 3.15 bugs and security fixes needs backport to 3.14 bugs and security fixes labels May 19, 2026
colesbury added a commit that referenced this pull request May 19, 2026
@miss-islington @colesbury
[3.14] gh-150114: Reduce memory usage of test_free_threading.test_ite…
dc3a0b4 
…ration (gh-150115) (#150123)

Reduce NUMITEMS from 100000 to 5000. Peak RSS for the full
test_free_threading suite drops from ~850 MB to ~175 MB.

(cherry picked from commit 61f1221)

Co-authored-by: Sam Gross <[email protected]>
colesbury added a commit that referenced this pull request May 19, 2026
@miss-islington @colesbury
[3.15] gh-150114: Reduce memory usage of test_free_threading.test_ite…
de401ef 
…ration (gh-150115) (#150124)

Reduce NUMITEMS from 100000 to 5000. Peak RSS for the full
test_free_threading suite drops from ~850 MB to ~175 MB.

(cherry picked from commit 61f1221)

Co-authored-by: Sam Gross <[email protected]>
@hugovk hugovk mentioned this pull request May 20, 2026
Ubuntu freethreading build failed twice spuriously #150139
Closed
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@cmaloney cmaloney cmaloney approved these changes
@zooba zooba zooba approved these changes

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skip news tests Tests in the Lib/test dir topic-free-threading

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@colesbury @zooba @cmaloney
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