javax/management/remote/mandatory/notif/ListenerScaleTest.java failed with "Exception: Failed: ratio=792.2791601423487"

The following test failed in the JDK22 CI:

javax/management/remote/mandatory/notif/ListenerScaleTest.java

Here's a snippet from the log file:

#section:main
----------messages:(7/296)----------
command: main ListenerScaleTest
reason: User specified action: run main ListenerScaleTest
started: Fri Jul 28 20:48:44 GMT 2023
Mode: othervm
Additional options from @modules: --add-modules java.management,java.management.rmi
finished: Fri Jul 28 20:48:49 GMT 2023
elapsed time (seconds): 4.688
----------configuration:(3/63)----------
Boot Layer
  add modules: java.management java.management.rmi

----------System.out:(7/466)----------
Time with a single MBean: 421500ns
Now registering 20000 MBeans
...1000...2000...3000...4000...5000...6000...7000...8000...9000...10000...11000...12000...13000...14000...15000...16000...17000...18000...19000...20000
Now registering 20000 listeners
...1000...2000...3000...4000...5000...6000...7000...8000...9000...10000...11000...12000...13000...14000...15000...16000...17000...18000...19000...20000
Timing a notification send now
Time with many MBeans: 333945666ns
----------System.err:(12/690)----------
java.lang.Exception: Failed: ratio=792.2791601423487
at ListenerScaleTest.test(ListenerScaleTest.java:191)
at ListenerScaleTest.main(ListenerScaleTest.java:149)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
at com.sun.javatest.regtest.agent.MainWrapper$MainTask.run(MainWrapper.java:138)
at java.base/java.lang.Thread.run(Thread.java:1570)

JavaTest Message: Test threw exception: java.lang.Exception: Failed: ratio=792.2791601423487
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.Exception: Failed: ratio=792.2791601423487
----------rerun:(36/6683)*----------