8321815: Shenandoah: gc state should be synchronized to java threads only once per safepoint

[earthling-amzn]

Trivial merge conflicts

---

Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8321815 needs maintainer approval

Issue

• JDK-8321815: Shenandoah: gc state should be synchronized to java threads only once per safepoint (Enhancement - P4 - Approved)

Reviewers

• Paul Hohensee (@phohensee - Reviewer)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk21u-dev.git pull/217/head:pull/217
$ git checkout pull/217

Update a local copy of the PR:
$ git checkout pull/217
$ git pull https://git.openjdk.org/jdk21u-dev.git pull/217/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 217

View PR using the GUI difftool:
$ git pr show -t 217

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk21u-dev/pull/217.diff

Webrev

Link to Webrev Comment

[bridgekeeper]

👋 Welcome back wkemper! 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]

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

[mlbridge]

Webrevs

• 00: Full (0bdfcb92)

[openjdk]

⚠️ @earthling-amzn This change is now ready for you to apply for maintainer approval. This can be done directly in each associated issue or by using the /approval command.

[earthling-amzn]

/approval request Not quite a clean backport, but conflicts were easily resolved. This change reduces work on the safepoint. We've tested this with Dacapo, Extremem, Heapothesys, SpecJBB2015 and SpecJVM2008.

[openjdk]

@earthling-amzn
8321815: The approval request has been created successfully.

[openjdk]

@earthling-amzn 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:

8321815: Shenandoah: gc state should be synchronized to java threads only once per safepoint

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 129 new commits pushed to the master branch:

• 608c98d: 8326496: [test] checkHsErrFileContent support printing hserr in error case
• d42da09: 8325743: test/jdk/java/nio/channels/unixdomain/SocketOptions.java enhance user name output in error case
• 2a6688f: 8320129: "top" command during jtreg failure handler does not display CPU usage on OSX
• da02da7: 8325432: enhance assert message "relocation addr must be in this section"
• c80be84: 8320005: Allow loading of shared objects with .a extension on AIX
• 44fdfc7: 8326101: [PPC64] Need to bailout cleanly if creation of stubs fails when code cache is out of space
• c8e9f1d: 8320113: [macos14] : ShapeNotSetSometimes.java fails intermittently on macOS 14
• 7f5afa1: 8326891: Prefer RPATH over RUNPATH for $ORIGIN rpaths in internal JDK binaries
• 7505194: 8320342: Use PassFailJFrame for TruncatedPopupMenuTest.java
• 779204c: 8320570: NegativeArraySizeException decoding >1G UTF8 bytes with non-ascii characters
• ... and 119 more: https://git.openjdk.org/jdk21u-dev/compare/2adc2b4f8a650ec8e8f01b57286a664eaf5975ec...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.

As you do not have Committer status in this project an existing Committer must agree to sponsor your change. Possible candidates are the reviewers of this PR (@phohensee) but any other Committer may sponsor as well.

➡️ To flag this PR as ready for integration with the above commit message, type /integrate in a new comment. (Afterwards, your sponsor types /sponsor in a new comment to perform the integration).

[GoeLin]

/integrate

[openjdk]

@GoeLin Only the author (@earthling-amzn) is allowed to issue the integrate command.

[earthling-amzn]

/integrate

[openjdk]

@earthling-amzn
Your change (at version 0bdfcb9) is now ready to be sponsored by a Committer.

[shipilev]

/sponsor

[openjdk]

Going to push as commit ad5a087.
Since your change was applied there have been 129 commits pushed to the master branch:

• 608c98d: 8326496: [test] checkHsErrFileContent support printing hserr in error case
• d42da09: 8325743: test/jdk/java/nio/channels/unixdomain/SocketOptions.java enhance user name output in error case
• 2a6688f: 8320129: "top" command during jtreg failure handler does not display CPU usage on OSX
• da02da7: 8325432: enhance assert message "relocation addr must be in this section"
• c80be84: 8320005: Allow loading of shared objects with .a extension on AIX
• 44fdfc7: 8326101: [PPC64] Need to bailout cleanly if creation of stubs fails when code cache is out of space
• c8e9f1d: 8320113: [macos14] : ShapeNotSetSometimes.java fails intermittently on macOS 14
• 7f5afa1: 8326891: Prefer RPATH over RUNPATH for $ORIGIN rpaths in internal JDK binaries
• 7505194: 8320342: Use PassFailJFrame for TruncatedPopupMenuTest.java
• 779204c: 8320570: NegativeArraySizeException decoding >1G UTF8 bytes with non-ascii characters
• ... and 119 more: https://git.openjdk.org/jdk21u-dev/compare/2adc2b4f8a650ec8e8f01b57286a664eaf5975ec...master

Your commit was automatically rebased without conflicts.

[openjdk]

@shipilev @earthling-amzn Pushed as commit ad5a087.

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