[jdk21u-dev] RFR: 8299023: TestPLABResize.java and TestPLABPromotion.java are failing intermittently

[Andrew Lu]

8299023: TestPLABResize.java and TestPLABPromotion.java are failing intermittently

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Commit messages:
 - Backport f50df105912858198809b50432ef5a4ab184528d

Changes: https://git.openjdk.org/jdk21u-dev/pull/563/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=563&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8299023
  Stats: 4 lines in 2 files changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/563.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/563/head:pull/563

PR: https://git.openjdk.org/jdk21u-dev/pull/563