RFR: 8308844: ProblemList gc/z/TestHighUsage.java with Generational ZGC on windows x64

[Stefan Karlsson]

The test fails intermittently in early tiers on Windows x64.

-------------

Commit messages:
 - 8308844: ProblemList gc/z/TestHighUsage.java with Generational ZGC

Changes: https://git.openjdk.org/jdk/pull/14144/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14144&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8308844
  Stats: 2 lines in 1 file changed: 2 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/14144.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14144/head:pull/14144

PR: https://git.openjdk.org/jdk/pull/14144