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  1. JDK
  2. JDK-8230305 Cgroups v2: Container awareness
  3. JDK-8231111

Cgroups v2: Rework Metrics in java.base so as to recognize unified hierarchy

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    • b11
    • generic
    • linux

    Backports

      Description

        Currently, the Linux-only Metrics class in jdk/internal/platform/Metrics.java hard-codes cgroups version 1:

            /**
             * Returns an instance of the Metrics class.
             *
             * @return Metrics object or null if not supported on this platform.
             */
            public static Metrics systemMetrics() {
                try {
                    // We currently only support cgroupv1
                    Class<?> c = Class.forName("jdk.internal.platform.cgroupv1.Metrics");
                [...]
             }

        For the cgroups v2 effort this needs to be reworked.

        On a F31 system with unified hierarchy only, java -XshowSettings:system look like this:

        $ bin/java -XshowSettings:system -version
        Operating System Metrics:
            No metrics available for this platform
        openjdk version "14-internal" 2020-03-17
        OpenJDK Runtime Environment (fastdebug build 14-internal+0-adhoc.sgehwolf.jdk-jdk)
        OpenJDK 64-Bit Server VM (fastdebug build 14-internal+0-adhoc.sgehwolf.jdk-jdk, mixed mode, sharing)

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            backported by

            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-8283563 Cgroups v2: Rework Metrics in java.base so as to recognize unified hierarchy

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • 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-8285290 Cgroups v2: Rework Metrics in java.base so as to recognize unified hierarchy

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • 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-8295080 Cgroups v2: Rework Metrics in java.base so as to recognize unified hierarchy

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • 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-8298077 Cgroups v2: Rework Metrics in java.base so as to recognize unified hierarchy

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved
            duplicates

            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-8261150 [TESTBUG] jdk/internal/platform/cgroup/TestCgroupMetrics.java fails for - memory:getMemoryUsage

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Closed
            relates to

            Bug - A problem which impairs or prevents the functions of the product. JDK-8291570 [TESTBUG] Part of JDK-8250984 absent from 11u

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

            Bug - A problem which impairs or prevents the functions of the product. JDK-8239559 Cgroups: Incorrect detection logic on some systems

            • P3 - Major loss of function.
            • Resolved

            Bug - A problem which impairs or prevents the functions of the product. JDK-8240189 [TESTBUG] Some cgroup tests are failing after JDK-8231111

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

            Bug - A problem which impairs or prevents the functions of the product. JDK-8244500 jtreg test error in test/hotspot/jtreg/containers/docker/TestMemoryAwareness.java

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

            Enhancement - null JDK-8226575 OperatingSystemMXBean should be made container aware

            • P3 - Major loss of function.
            • Resolved
            links to

            Commit Commit openjdk/jdk8u-dev/c9007cd4

            Commit Commit openjdk/jdk11u-dev/19f26f72

            Review Review openjdk/jdk8u-dev/121

            Review Review openjdk/jdk11u-dev/863

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                sgehwolf Severin Gehwolf
                sgehwolf Severin Gehwolf
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                  Updated:
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