8366893: java/lang/Thread/virtual/stress/GetStackTraceALotWhenPinned.java timed out on macos-aarch64

[shipilev]

GetStackTraceALotWhenPinned test times out every so often in GHA.

The last sightings are on macos-aarch64:

2025-09-04T10:41:29.357879Z => 87894 of 100000
2025-09-04T10:41:30.365534Z => 88105 of 100000
Timeout signalled after 300 seconds
2025-09-04T10:41:31.367068Z => 88298 of 100000
2025-09-04T10:41:32.377128Z => 88400 of 100000

2025-09-03T10:08:37.713537Z => 74715 of 100000
2025-09-03T10:08:38.717750Z => 74818 of 100000
Timeout signalled after 300 seconds
2025-09-03T10:08:39.722960Z => 74922 of 100000
2025-09-03T10:08:40.726642Z => 75024 of 100000

Looks like we are nearly there, just need fewer iterations. I think like with JDK-8344577, we just need to extend the test check for AArch64 macs as well.

Additional testing:

• MacOS AArch64 server fastdebug, java/lang/Thread/virtual/stress, 10x

---

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Issue

• JDK-8366893: java/lang/Thread/virtual/stress/GetStackTraceALotWhenPinned.java timed out on macos-aarch64 (Bug - P4)

Reviewers

• Alan Bateman (@AlanBateman - Reviewer)
• Jaikiran Pai (@jaikiran - Reviewer)

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8366893: java/lang/Thread/virtual/stress/GetStackTraceALotWhenPinned.java timed out on macos-aarch64

Reviewed-by: alanb, jpai

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At the time when this comment was updated there had been 11 new commits pushed to the master branch:

• e6fa8aa: 8366845: C2 SuperWord: wrong VectorCast after VectorReinterpret with swapped src/dst type
• a2f8d3c: 8366765: [REDO] Rename JavaLangAccess::*NoRepl methods
• 0d7f8f8: 8366747: RISC-V: Improve VerifyMethodHandles for method handle linkers
• ... and 8 more: https://git.openjdk.org/jdk/compare/e19035577724f40aca14ef7d5dad0906ce9e89ab...master

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[mlbridge]

Webrevs

• 00: Full (164ec93e)

[AlanBateman]

It looks like GH is using a fleet of Reliant Robins as the runners for macOS arm64. Do you know what value of JTREG_JOBS is used for jtreg --concurrency on these apparently 3-core VMs? If concurrency is >1 then I assume we have more than one stress test running concurrently.

(The change are okay of course. Right now, the TL handshake for virtual threads is limited to JVMTI usages but that make change, in which case we can re-visit Thread::getStackTrace and avoid the retry during transitions, and reduce the need for the GetStackTraceALotXXX stress tests).

[shipilev]

It looks like GH is using a fleet of Reliant Robins as the runners for macOS arm64. Do you know what value of JTREG_JOBS is used for jtreg --concurrency on these apparently 3-core VMs? If concurrency is >1 then I assume we have more than one stress test running concurrently.

configure step says:

Build performance summary:
* Build jobs:     3
* Memory limit:   7168 MB

TEST_JOBS, AFAICS from build files, follows the number of build jobs, so, 3?

[shipilev]

Seeing these tests failing often now. I think I need a second reviewer to integrate this, to make testing cleaner.

[AlanBateman]

Seeing these tests failing often now. I think I need a second reviewer to integrate this, to make testing cleaner.

One Reviewer is okay here.

[jaikiran]

Looks OK to me.

[shipilev]

OK, thanks, here goes.

/integrate

[openjdk]

Going to push as commit 0dad3f1.
Since your change was applied there have been 11 commits pushed to the master branch:

• e6fa8aa: 8366845: C2 SuperWord: wrong VectorCast after VectorReinterpret with swapped src/dst type
• a2f8d3c: 8366765: [REDO] Rename JavaLangAccess::*NoRepl methods
• 0d7f8f8: 8366747: RISC-V: Improve VerifyMethodHandles for method handle linkers
• ... and 8 more: https://git.openjdk.org/jdk/compare/e19035577724f40aca14ef7d5dad0906ce9e89ab...master

Your commit was automatically rebased without conflicts.

[openjdk]

@shipilev Pushed as commit 0dad3f1.

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