RFR: 8336148: Test runtime/locking/TestRecursiveMonitorChurn.java failed: Unexpected Inflation

[Axel Boldt-Christmas]

When writing the test I suspected that this might happen.

I wanted to see if we could get away without a fuzz factor on the post and pre inflation comparison.

I'll update the test with a fuzz factor that can handle that some spurious inflation from other sources can occur. Especially relevant now that class loading uses an ObjectLocker, which is why it occurred when instrumentation was added and not only with the -XX:+DeoptimizeALot flags.

Will run through the problematic tests and check that these help. All observed occurrences have been with a difference of one between pre and post inflation counts.

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Commit messages:
 - 8336148: Test runtime/locking/TestRecursiveMonitorChurn.java failed: Unexpected Inflation

Changes: https://git.openjdk.org/jdk/pull/20551/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20551&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8336148
  Stats: 12 lines in 1 file changed: 12 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/20551.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20551/head:pull/20551

PR: https://git.openjdk.org/jdk/pull/20551