The following test failed in the JDK20 CI:

gc/metaspace/TestMetaspacePerfCounters.java#Epsilon-64

Here's a snippet from the log file:

#section:main
----------messages:(7/816)----------
command: main -XX:+UnlockExperimentalVMOptions -XX:-UseCompressedOops -XX:-UseCompressedClassPointers -XX:+UsePerfData -XX:+UseEpsilonGC gc.metaspace.TestMetaspacePerfCounters
reason: User specified action: run main/othervm -XX:+UnlockExperimentalVMOptions -XX:-UseCompressedOops -XX:-UseCompressedClassPointers -XX:+UsePerfData -XX:+UseEpsilonGC gc.metaspace.TestMetaspacePerfCounters
started: Wed Sep 07 18:22:29 GMT 2022
Mode: othervm [/othervm specified]
Additional options from @modules: --add-modules java.base,java.compiler,java.management,jdk.internal.jvmstat --add-exports java.base/jdk.internal.misc=ALL-UNNAMED --add-exports java.management/sun.management=ALL-UNNAMED --add-exports jdk.internal.jvmstat/sun.jvmstat.monitor=ALL-UNNAMED
finished: Wed Sep 07 18:22:29 GMT 2022
elapsed time (seconds): 0.367
----------configuration:(6/293)----------
Boot Layer
  add modules: java.base java.compiler java.management jdk.internal.jvmstat
  add exports: java.base/jdk.internal.misc ALL-UNNAMED
               java.management/sun.management ALL-UNNAMED
               jdk.internal.jvmstat/sun.jvmstat.monitor ALL-UNNAMED

----------System.out:(2/185)----------
[0.008s][warning][gc,init] Consider setting -Xms equal to -Xmx to avoid resizing hiccups
[0.008s][warning][gc,init] Consider enabling -XX:+AlwaysPreTouch to avoid memory commit hiccups
----------System.err:(19/1259)----------
java version "20-ea" 2023-03-21
Java(TM) SE Runtime Environment (fastdebug build 20-ea+14-944)
Java HotSpot(TM) 64-Bit Server VM (fastdebug build 20-ea+14-944, mixed mode)
java.lang.RuntimeException: assertGreaterThanOrEqual: expected 8454144 >= 8917632
at jdk.test.lib.Asserts.fail(Asserts.java:594)
at jdk.test.lib.Asserts.assertGreaterThanOrEqual(Asserts.java:288)
at jdk.test.lib.Asserts.assertGreaterThanOrEqual(Asserts.java:271)
at jdk.test.lib.Asserts.assertGTE(Asserts.java:246)
at gc.metaspace.TestMetaspacePerfCounters.checkPerfCounters(TestMetaspacePerfCounters.java:231)
at gc.metaspace.TestMetaspacePerfCounters.main(TestMetaspacePerfCounters.java:195)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:125)
at java.base/java.lang.Thread.run(Thread.java:1589)

JavaTest Message: Test threw exception: java.lang.RuntimeException: assertGreaterThanOrEqual: expected 8454144 >= 8917632