[jdk11u-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/jdk11u-dev/pull/2708/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2708&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/jdk11u-dev/pull/2708.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2708/head:pull/2708

PR: https://git.openjdk.org/jdk11u-dev/pull/2708