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8227060: Optimize safepoint cleanup subtask order #1377

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8227060: Optimize safepoint cleanup subtask order #1377

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shipilev
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@shipilev shipilev commented May 19, 2023 •
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Unclean backport to improve the safepoint cleanup times. Provides the grounds for the ultimate improvement in safepoint cleanup (JDK-8306738). The backport is not clean, because there are copyright years conflicts, the rename of AbstractGangTask to WorkerTask is missing, WorkGang -> WorkerThreads rename is missing, JavaThread::cast cleanup is missing.

Additional testing:

  • Ad-hoc benchmarks
  • Linux x86_64 fastdebug tier1 tier2 tier3

The safepoint cleanup times are slightly better on small tests, and there seem to be no regressions.
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  • Change must be properly reviewed (1 review required, with at least 1 Reviewer)
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  • Commit message must refer to an issue

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  • JDK-8227060: Optimize safepoint cleanup subtask order

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Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk17u-dev.git pull/1377/head:pull/1377
$ git checkout pull/1377

Update a local copy of the PR:
$ git checkout pull/1377
$ git pull https://git.openjdk.org/jdk17u-dev.git pull/1377/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 1377

View PR using the GUI difftool:
$ git pr show -t 1377

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk17u-dev/pull/1377.diff

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bridgekeeper bot commented May 19, 2023

👋 Welcome back shade! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

@openjdk openjdk bot changed the title Backport 96a542feb2064dba155ebf05311752995d164038 8227060: Optimize safepoint cleanup subtask order May 19, 2023
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openjdk bot commented May 19, 2023

This backport pull request has now been updated with issue from the original commit.

@openjdk openjdk bot added the backport label May 19, 2023
@shipilev shipilev marked this pull request as ready for review May 19, 2023 14:40
@openjdk openjdk bot added the rfr Pull request is ready for review label May 19, 2023
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mlbridge bot commented May 19, 2023 •
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@openjdk openjdk bot mentioned this pull request May 19, 2023
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phohensee
phohensee approved these changes May 19, 2023
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Lgtm.

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openjdk bot commented May 19, 2023 •
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@shipilev This change now passes all automated pre-integration checks.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

After integration, the commit message for the final commit will be:

8227060: Optimize safepoint cleanup subtask order

Reviewed-by: phh

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

At the time when this comment was updated there had been 22 new commits pushed to the master branch:

  • 6033871: 8306640: Open source several AWT TextArea related tests
  • 05b2ff4: 8308554: [17u] Fix commit of 8286191. vm.musl was not removed from ExternalEditorTest
  • 9c0afc5: 8306752: Open source several container and component AWT tests
  • 4caa421: 8306755: Open source few Swing JComponent and AbstractButton tests
  • b5d3772: 8306683: Open source several clipboard and color AWT tests
  • 09e6880: 8306652: Open source AWT MenuItem related tests
  • 18ec008: 8306409: Open source AWT KeyBoardFocusManger, LightWeightComponent related tests
  • 536e133: 8306850: Open source AWT Modal related tests
  • 7277a75: 8306072: Open source several AWT MouseInfo related tests
  • 40526a7: 8307080: Open source some more JComboBox jtreg tests
  • ... and 12 more: https://git.openjdk.org/jdk17u-dev/compare/879f4c591b82494157f3013041695a4cc4f1996b...master

As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid this automatic rebasing, please check the documentation for the /integrate command for further details.

➡️ To integrate this PR with the above commit message to the master branch, type /integrate in a new comment.

@openjdk openjdk bot added the ready Pull request is ready to be integrated label May 19, 2023
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Lgtm.

Thank you! I marked the issue for maintainer approval.

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Lgtm.

While looking at it again, I noticed that I missed the optimization from the original change: 1dbff5e -- please re-review. Re-doing testing again, expecting no problems.

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Lgtm.

While looking at it again, I noticed that I missed the optimization from the original change: 1dbff5e -- please re-review. Re-doing testing again, expecting no problems.

@phohensee, if you can review again, please? Thanks!

phohensee
phohensee approved these changes May 24, 2023
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I missed that too! Ltgm, again.

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Testing is clean, reviews are good, push approval is here.

/integrate

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openjdk bot commented May 24, 2023

Going to push as commit 464a32b.
Since your change was applied there have been 22 commits pushed to the master branch:

  • 6033871: 8306640: Open source several AWT TextArea related tests
  • 05b2ff4: 8308554: [17u] Fix commit of 8286191. vm.musl was not removed from ExternalEditorTest
  • 9c0afc5: 8306752: Open source several container and component AWT tests
  • 4caa421: 8306755: Open source few Swing JComponent and AbstractButton tests
  • b5d3772: 8306683: Open source several clipboard and color AWT tests
  • 09e6880: 8306652: Open source AWT MenuItem related tests
  • 18ec008: 8306409: Open source AWT KeyBoardFocusManger, LightWeightComponent related tests
  • 536e133: 8306850: Open source AWT Modal related tests
  • 7277a75: 8306072: Open source several AWT MouseInfo related tests
  • 40526a7: 8307080: Open source some more JComboBox jtreg tests
  • ... and 12 more: https://git.openjdk.org/jdk17u-dev/compare/879f4c591b82494157f3013041695a4cc4f1996b...master

Your commit was automatically rebased without conflicts.

@openjdk openjdk bot added the integrated Pull request has been integrated label May 24, 2023
@openjdk openjdk bot closed this May 24, 2023
@openjdk openjdk bot removed ready Pull request is ready to be integrated rfr Pull request is ready for review labels May 24, 2023
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openjdk bot commented May 24, 2023

@shipilev Pushed as commit 464a32b.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.

@shipilev shipilev deleted the JDK-8227060-optimize-safepoint-cleanup-order branch July 20, 2023 11:59
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