The following test failed in the JDK20 CI:

serviceability/tmtools/jstat/GcNewTest.java

Here's a snippet from the log file:

#section:main
----------messages:(5/313)----------
command: main -XX:+UsePerfData -Xmx128M GcNewTest
reason: User specified action: run main/othervm -XX:+UsePerfData -Xmx128M GcNewTest
Mode: othervm [/othervm specified]
Additional options from @modules: --add-modules java.base --add-exports java.base/jdk.internal.misc=ALL-UNNAMED
elapsed time (seconds): 56.948
----------configuration:(4/111)----------
Boot Layer
  add modules: java.base
  add exports: java.base/jdk.internal.misc ALL-UNNAMED

----------System.out:(7/669)----------
[2022-09-01T12:11:07.950252253Z] started process 2371387 [/opt/mach5/mesos/work_dir/jib-master/install/jdk-20+13-823/linux-x64-debug.jdk/jdk-20/fastdebug/bin/jstat, -gcnew, 2371242] with out/err redirected to './out.12311963719972759977.txt' and './err.12311963719972759977.txt'
[2022-09-01T12:11:15.049856384Z] process 2371387 finished with exit code = 0
Process output: Exit code: 0
stdout: S0C S1C S0U S1U TT MTT DSS EC EU YGC YGCT
        0.0 0.0 0.0 0.0 15 15 0.0 25600.0 4096.0 0 0.000
stderr:
Committed size of the pool 'Eden Space' is 25600
----------System.err:(12/914)----------
java.lang.RuntimeException: Error in the percent calculation (eden size: 25600, heap size: 17408, calculated eden percent: 1.4705882)
at utils.GcProvoker.provokeGc(GcProvoker.java:66)
at GcNewTest.main(GcNewTest.java:53)
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:127)
at java.base/java.lang.Thread.run(Thread.java:1589)

JavaTest Message: Test threw exception: java.lang.RuntimeException: Error in the percent calculation (eden size: 25600, heap size: 17408, calculated eden percent: 1.4705882)
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: Error in the percent calculation (eden size: 25600, heap size: 17408, calculated eden percent: 1.4705882)
----------rerun:(48/8778)*----------