8364722: Parallel: Move CLDG mark clearing to the end of full GC

[albertnetymk]

Move ClassLoaderDataGraph claim-mark clearing to post_compact (the end of full-gc), to be more aligned with other GCs.

Test: tier1-3

---

Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
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Issue

• JDK-8364722: Parallel: Move CLDG mark clearing to the end of full GC (Enhancement - P4)

Reviewers

• Thomas Schatzl (@tschatzl - Reviewer)
• Zhengyu Gu (@zhengyu123 - Reviewer)

Reviewing

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$ git pull https://git.openjdk.org/jdk.git pull/26637/head

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$ git pr checkout 26637

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[bridgekeeper]

👋 Welcome back ayang! 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]

@albertnetymk 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:

8364722: Parallel: Move CLDG mark clearing to the end of full GC

Reviewed-by: tschatzl, zgu

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 4 new commits pushed to the master branch:

• d906e45: 8364531: G1: Factor out liveness tracing code
• 8a571ee: 8364667: JFR: Throttle doesn't work with dynamic events
• ba0ae4c: 8364254: Serial: Remove soft ref policy update in WhiteBox FullGC
• ... and 1 more: https://git.openjdk.org/jdk/compare/d25b9befe0a462b9785502806ad14e0a5f6b4320...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]

@albertnetymk The following label will be automatically applied to this pull request:

• hotspot-gc

When this pull request is ready to be reviewed, an "RFR" email will be sent to the corresponding mailing list. If you would like to change these labels, use the /label pull request command.

[mlbridge]

Webrevs

• 00: Full (79a0df8e)

[zhengyu123]

LGTM

[albertnetymk]

Thanks for review.

/integrate

[albertnetymk]

/integrate

[openjdk]

Going to push as commit 72d1066.
Since your change was applied there have been 11 commits pushed to the master branch:

• 0ceb366: 8356645: Javac should utilize new ZIP file system read-only access mode
• 9dffbc9: 8364540: Apply @stable to Shared Secrets
• e304d37: 8361211: C2: Final graph reshaping generates unencodeable klass constants
• ... and 8 more: https://git.openjdk.org/jdk/compare/d25b9befe0a462b9785502806ad14e0a5f6b4320...master

Your commit was automatically rebased without conflicts.

[openjdk]

@albertnetymk Pushed as commit 72d1066.

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

[openjdk]

@albertnetymk The command integrate can only be used in open pull requests.