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  1. JDK
  2. JDK-8325137

com/sun/management/ThreadMXBean/ThreadCpuTimeArray.java can fail in Xcomp with out of expected range

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        Even though JDK-8311306 resolved one source of this test failing with the "out of expected range" error message, we're seeing that it can still fail under -Xcomp on libgraal. It seems to happen when the ThreadCpuTimeArray::doit method is deoptimized at the "wrong" time and the time taken to recompile it increases the delay between 2 timing calls for the thread running that method. The delay can be increased beyond the threshold expected by the test, causing it to fail:

        java.lang.RuntimeException: TEST FAILED: MyThread-1 CPU time = 9189423 previous CPU time 8584379 out of expected range
        at ThreadCpuTimeArray.main(ThreadCpuTimeArray.java:145)
        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:1575)

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                dnsimon Douglas Simon
                dnsimon Douglas Simon
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