8315781: Reduce the max value of GCDrainStackTargetSize

[albertnetymk]

Simple adjustment to the max value of GCDrainStackTargetSize.

I picked 8K because the default queue capacity is ~16K and G1 use 2x of GCDrainStackTargetSize as some threshold.

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Progress

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Issue

• JDK-8315781: Reduce the max value of GCDrainStackTargetSize (Enhancement - P4)

Reviewers

• Thomas Schatzl (@tschatzl - Reviewer) ⚠️ Review applies to 6104cf26
• Ivan Walulya (@walulyai - Reviewer)

Reviewing

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$ git checkout pull/15590

Update a local copy of the PR:
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$ git pull https://git.openjdk.org/jdk.git pull/15590/head

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[bridgekeeper]

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[openjdk]

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

• hotspot-gc

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[mlbridge]

Webrevs

• 01: Full - Incremental (ba16c5f4)
• 00: Full (6104cf26)

[tschatzl]

Lgtm. I think 8 * K can be written there as well.

[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:

8315781: Reduce the max value of GCDrainStackTargetSize

Reviewed-by: tschatzl, iwalulya

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 52 new commits pushed to the master branch:

• ab6a87e: 8314838: 3 compiler tests ignore vm flags
• b3dfc39: 8315930: Revert "8315220: Event NativeLibraryLoad breaks invariant by taking a stacktrace when thread is in state _thread_in_native"
• ebc718f: 8315818: vmTestbase/nsk/jvmti/Allocate/alloc001/alloc001.java fails on libgraal
• 4a6bd81: 8315854: G1: Remove obsolete comment in G1ReclaimEmptyRegionsTask
• c664f1c: 8307352: AARCH64: Improve itable_stub
• 8ddf9ea: 8315686: G1: Disallow evacuation of marking regions in a Prepare Mixed gc
• 7ef059a: 8315605: G1: Add number of nmethods in code roots scanning statistics
• 825e0ed: 8315774: Enable parallelism in vmTestbase/gc/g1/unloading tests
• dac1727: 8308869: C2: use profile data in subtype checks when profile has more than one class
• 3c258ac: 8315702: jcmd Thread.dump_to_file slow with millions of virtual threads
• ... and 42 more: https://git.openjdk.org/jdk/compare/939d7c5d8466f9e392beae2947a494ac28695cc1...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.

[albertnetymk]

Thanks for the review.

/integrate

[openjdk]

Going to push as commit 996b336.
Since your change was applied there have been 64 commits pushed to the master branch:

• 35bccac: 8315841: RISC-V: Check for hardware TSO support
• a04c6c1: 8315609: Open source few more swing text/html tests
• dab1c21: 8314491: Linux: jexec launched via PATH fails to find java
• 9a83d55: 8315373: Change VirtualThread to unmount after freezing, re-mount before thawing
• 68f6941: 8314452: Explicitly indicate inlining success/failure in PrintInlining
• b482e6d: 8315580: Remove unused java_lang_String::set_value_raw()
• 9b0da48: 8315410: Undocumented exceptions in java.text.StringCharacterIterator
• 578ded4: 8312418: Add Elements.getEnumConstantBody
• dccf670: 8306632: Add a JDK Property for specifying DTD support
• a62c48b: 8315891: java/foreign/TestLinker.java failed with "error occurred while instantiating class TestLinker: null"
• ... and 54 more: https://git.openjdk.org/jdk/compare/939d7c5d8466f9e392beae2947a494ac28695cc1...master

Your commit was automatically rebased without conflicts.

[openjdk]

@albertnetymk Pushed as commit 996b336.

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