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gh-150389: Make perf profiler tests resilient#150437

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pablogsal:gh-150389
May 27, 2026
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gh-150389: Make perf profiler tests resilient#150437
pablogsal merged 1 commit into
python:mainfrom
pablogsal:gh-150389

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@pablogsal pablogsal commented May 25, 2026 •
edited by bedevere-app Bot
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Keep perf test output independent from user perf configuration and debuginfod, reduce DWARF sample loss, and retry captures only when expected Python symbols are missing.

Do not fail profiler assertions solely because perf script writes to stderr.

Closes gh-150395.

@bedevere-app bedevere-app Bot added tests Tests in the Lib/test dir awaiting core review labels May 25, 2026
@bedevere-app bedevere-app Bot mentioned this pull request May 25, 2026
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@pablogsal pablogsal added the 🔨 test-with-buildbots Test PR w/ buildbots; report in status section label May 25, 2026
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bedevere-bot commented May 25, 2026

🤖 New build scheduled with the buildbot fleet by @pablogsal for commit f7e8d0b 🤖

Results will be shown at:

https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F150437%2Fmerge

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 25, 2026
@pablogsal
pythongh-150389: Make perf profiler tests resilient
e98e791 
Keep perf test output independent from user perf configuration and
debuginfod, reduce DWARF sample loss, and retry captures only when
expected Python symbols are missing.

Do not fail profiler assertions solely because perf script writes to
stderr.

Closes pythongh-150395.
@pablogsal pablogsal added the 🔨 test-with-buildbots Test PR w/ buildbots; report in status section label May 26, 2026
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bedevere-bot commented May 26, 2026

🤖 New build scheduled with the buildbot fleet by @pablogsal for commit e98e791 🤖

Results will be shown at:

https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F150437%2Fmerge

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 26, 2026
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pablogsal commented May 26, 2026

!buildbot TraceRefs

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bedevere-bot commented May 26, 2026

🤖 New build scheduled with the buildbot fleet by @pablogsal for commit e98e791 🤖

Results will be shown at:

https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F150437%2Fmerge

The command will test the builders whose names match following regular expression: TraceRefs

The builders matched are:

  • AMD64 Arch Linux TraceRefs PR

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pablogsal commented May 26, 2026

!buildbot aarch64

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bedevere-bot commented May 26, 2026

🤖 New build scheduled with the buildbot fleet by @pablogsal for commit e98e791 🤖

Results will be shown at:

https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F150437%2Fmerge

The command will test the builders whose names match following regular expression: aarch64

The builders matched are:

  • aarch64 Fedora Rawhide PR
  • aarch64 CentOS9 LTO + PGO PR
  • aarch64 Fedora Stable Clang PR
  • aarch64 RHEL8 Refleaks PR
  • aarch64 RHEL8 LTO PR
  • aarch64 Android PR
  • aarch64 Ubuntu 24.04 BigMem PR
  • aarch64 Fedora Rawhide Clang Installed PR
  • aarch64 Fedora Rawhide NoGIL PR
  • aarch64 Fedora Stable LTO PR
  • aarch64 Fedora Stable PR
  • aarch64 Fedora Rawhide LTO + PGO PR
  • aarch64 Fedora Rawhide LTO PR
  • aarch64 Ubuntu Oddballs PR
  • aarch64 Fedora Rawhide Clang PR
  • aarch64 CentOS9 LTO PR
  • aarch64 Fedora Stable Clang Installed PR
  • aarch64 Fedora Stable Refleaks PR
  • aarch64 CentOS9 Refleaks PR
  • aarch64 Fedora Stable LTO + PGO PR
  • aarch64 RHEL8 LTO + PGO PR
  • aarch64 RHEL8 PR
  • aarch64 Fedora Rawhide Refleaks PR
  • aarch64 Fedora Rawhide NoGIL refleaks PR

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pablogsal commented May 27, 2026

Buildbots are happy so landing

@pablogsal pablogsal merged commit 638754c into python:main May 27, 2026
121 of 123 checks passed
@pablogsal pablogsal deleted the gh-150389 branch May 27, 2026 12:22
@pablogsal pablogsal added needs backport to 3.14 bugs and security fixes needs backport to 3.15 pre-release feature fixes, bugs and security fixes labels May 27, 2026
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miss-islington-app Bot commented May 27, 2026

Thanks @pablogsal for the PR 🌮🎉.. I'm working now to backport this PR to: 3.14.
🐍🍒⛏🤖

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miss-islington-app Bot commented May 27, 2026

Thanks @pablogsal for the PR 🌮🎉.. I'm working now to backport this PR to: 3.15.
🐍🍒⛏🤖

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miss-islington-app Bot commented May 27, 2026

Sorry, @pablogsal, I could not cleanly backport this to 3.14 due to a conflict.
Please backport using cherry_picker on command line.

cherry_picker 638754cb8579a4f7acfd465c885f783c073c0baf 3.14

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bedevere-app Bot commented May 27, 2026

GH-150515 is a backport of this pull request to the 3.15 branch.

@bedevere-app bedevere-app Bot removed the needs backport to 3.15 pre-release feature fixes, bugs and security fixes label May 27, 2026
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vstinner commented May 27, 2026

Thanks for the fix @pablogsal!

pablogsal pushed a commit that referenced this pull request May 27, 2026
@miss-islington
[3.15] gh-150389: Make perf profiler tests resilient (GH-150437) (#15…
cc6fea8 
…0515)
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test_perf_profiler fails with: "Warning: Processed 631 events and lost 1 chunks! Check IO/CPU overload!"

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