8210100: ParallelGC should use parallel WeakProcessor

[albertnetymk]

Benchmarking using specjvm2008 shows "Weak Processing" takes <1ms. There are >800 occurrences where "Weak Processing" takes >0.4ms, while only 5 occurrences after the patch, as shown in gc logs.

PS: I changed the log level from Debug to Info for "Weak Processing" for benchmarking in order not limit the logs.

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• Change must be properly reviewed

Issue

• JDK-8210100: ParallelGC should use parallel WeakProcessor

Reviewers

• Kim Barrett (@kimbarrett - Reviewer)
• Thomas Schatzl (@tschatzl - Reviewer)
• Stefan Johansson (@kstefanj - Reviewer)

Download

$ git fetch https://git.openjdk.java.net/jdk pull/2851/head:pull/2851
$ git checkout pull/2851

[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 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 (bbd635f)

[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:

8210100: ParallelGC should use parallel WeakProcessor

Reviewed-by: kbarrett, tschatzl, sjohanss

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 16 new commits pushed to the master branch:

• 22a3117: 8263137: Typos in sun.security.ssl.RenegoInfoExtension
• 18fc350: 8259886: Improve SSL session cache performance and scalability
• 3844ce4: 8261247: some compiler/whitebox/ tests fail w/ DeoptimizeALot
• f2d0152: 8263043: Add test to verify order of tag output
• 7182985: 8263104: fix warnings for empty paragraphs
• 5eb2091: 8261689: javax/swing/JComponent/7154030/bug7154030.java still fails with "Exception: Failed to hide opaque button"
• 75a5be8: 8263054: [testbug] SharedArchiveConsistency.java reuses jsa files
• 2afbd5d: 8250804: Can't set the application icon image for Unity WM on Linux.
• fa43f92: 8261845: File permissions of packages built by jpackage
• 23ee60d: 8261008: Optimize Xor
• ... and 6 more: https://git.openjdk.java.net/jdk/compare/9730266d02bc2952c3621ebc2b7d6dee2a97c0e0...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.

[tschatzl]

Lgtm.

[kstefanj]

Looks good.

[albertnetymk]

Thanks for the review.

/integrate

[openjdk]

@albertnetymk Since your change was applied there have been 22 commits pushed to the master branch:

• 679faa6: 8263097: Update JMH devkit to 1.28
• ab2cfcc: 8252831: Correct "no comment" warnings in jdk.net module
• 51cca57: 8259577: Dangling reference to temp_path in Java_sun_tools_attach_VirtualMachineImpl_getTempDir
• a0c3f24: 8263091: Remove CharacterData.isOtherUppercase/-Lowercase
• 13625be: 8263090: Avoid reading volatile fields twice in Locale.getDefault(Category)
• 61cff4d: 8257913: Add more known library locations to simplify Linux cross-compilation
• 22a3117: 8263137: Typos in sun.security.ssl.RenegoInfoExtension
• 18fc350: 8259886: Improve SSL session cache performance and scalability
• 3844ce4: 8261247: some compiler/whitebox/ tests fail w/ DeoptimizeALot
• f2d0152: 8263043: Add test to verify order of tag output
• ... and 12 more: https://git.openjdk.java.net/jdk/compare/9730266d02bc2952c3621ebc2b7d6dee2a97c0e0...master

Your commit was automatically rebased without conflicts.

Pushed as commit 0da889e.

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