8373086: Make isexceeded001.java more robust

[albertnetymk]

The original intended fix is to increase initial-heap-size so avoid gc, captured in JDK-8373022. This is an alternative, which makes the test more resilient to changes in heaps/gcs.

Running vmTestbase/nsk/monitoring/MemoryPoolMBean/isUsageThresholdExceeded/isexceeded002/TestDescription.java
with -XX:+UseParallelGC -Xcomp -XX:-TieredCompilation -XX:InitialRAMPercentage=0 fails about 10% of the time.

After applying the fix, isexceeded002 passes 2,000 runs.

---

Progress

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Issue

• JDK-8373086: Make isexceeded001.java more robust (Bug - P4)

Reviewers

• Joel Sikström (@jsikstro - Reviewer)
• Thomas Schatzl (@tschatzl - Reviewer)

Reviewing

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[openjdk]

@albertnetymk This change now passes all automated pre-integration checks.

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After integration, the commit message for the final commit will be:

8373086: Make isexceeded001.java more robust

Reviewed-by: jsikstro, tschatzl

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At the time when this comment was updated there had been 12 new commits pushed to the master branch:

• c55287d: 8370890: Start of release updates for JDK 27
• 45dcc0e: 8371914: PNG defines in CFLAGS can cause compilation errors with external libpng
• 2735140: 8370939: C2: SIGSEGV in SafePointNode::verify_input when processing MH call from Compile::process_late_inline_calls_no_inline()
• ... and 9 more: https://git.openjdk.org/jdk/compare/317daa3c004fbb1738e0af6acfbaf50c403c8230...master

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[openjdk]

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[mlbridge]

Webrevs

• 00: Full (a72634ff)

[jsikstro]

Looks good. Interesting test bug.

[albertnetymk]

Thanks for review.

/integrate

[openjdk]

Going to push as commit 4d696d0.
Since your change was applied there have been 25 commits pushed to the master branch:

• ee0b8a7: 8373102: com/sun/jdi/MethodInvokeWithTraceOnTest.java can fail with ObjectCollectedException when run with a small heap
• c09167d: 8373113: Fix whitespace in RunTests.gmk
• 674cc3e: 8042054: JTree.updateUI uses out-of-date item size information
• ... and 22 more: https://git.openjdk.org/jdk/compare/317daa3c004fbb1738e0af6acfbaf50c403c8230...master

Your commit was automatically rebased without conflicts.

[openjdk]

@albertnetymk Pushed as commit 4d696d0.

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