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  1. JDK
  2. JDK-8247469

getSystemCpuLoad() returns -1 on linux when some offline cpus are present and cpusets.effective_cpus is not available

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        On one of our Linux machines we have the following :
        - a few CPUs are offline (means the configured cpus are 48 but the online cpus are 32)
        - the machine does not have cpusets.effective_cpus

        In this case getSystemCpuLoad() / getCpuLoad() returns -1 (because it checks that 48 != 32, and next it checks for cpusets.effective_cpus which is not present ).

        See the coding at :
        https://hg.openjdk.java.net/jdk/jdk/file/bdc14b8d31ff/src/jdk.management/unix/classes/com/sun/management/internal/OperatingSystemImpl.java#l136

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            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8268057 getSystemCpuLoad() returns -1 on linux when some offline cpus are present and cpusets.effective_cpus is not available

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8269875 getSystemCpuLoad() returns -1 on linux when some offline cpus are present and cpusets.effective_cpus is not available

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8272145 getSystemCpuLoad() returns -1 on linux when some offline cpus are present and cpusets.effective_cpus is not available

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8282584 getSystemCpuLoad() returns -1 on linux when some offline cpus are present and cpusets.effective_cpus is not available

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8284591 getSystemCpuLoad() returns -1 on linux when some offline cpus are present and cpusets.effective_cpus is not available

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8282707 getSystemCpuLoad() returns -1 on linux when some offline cpus are present and cpusets.effective_cpus is not available

            • P3 - Major loss of function.
            • Closed
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            Commit Commit openjdk/jdk11u-dev/624e91bd

            Review Review openjdk/jdk11u-dev/9

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                mbaesken Matthias Baesken
                mbaesken Matthias Baesken
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