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  1. JDK
  2. JDK-6526682

JConsole shows negative CPU Usage

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    • b94
    • x86
    • linux_2.6, windows_xp

      While monitoring of CPU Usage jconsole shows negtive CPU Usage.

      .csv file and screenshot of such situation are atteched.

      How to reproduce:

      Start jconsole and attach it to any process(Java2D demo in my case).
      Negative cpu usage will be shown on cpu usage monitor afrter some monitoring time.

      My Machine:
      Processor: Intel(R) Pentium(R) D CPU 3.20GHz x2
      OS: Gentoo Linux

      On slow machines like P-III(~800 MHz) cpu monotor shows correct values.

            nloodin Nils Loodin (Inactive)
            imikhailsunw Igor Mikhailuk (Inactive)
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