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  1. JDK
  2. JDK-8305670 Performance regression in LockSupport.unpark with lots of idle threads
  3. JDK-8307068

store a JavaThread* in the java.lang.Thread object after the JavaThread* is added to the main ThreadsList

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    • b23
    • generic
    • generic

    Backports

      Description

        During the lengthy discussions and analysis of the following fix:

            JDK-8305670 Performance regression in LockSupport.unpark with lots of idle threads

        we concluded that a JavaThread* should be stored in the java.lang.Thread
        object after the JavaThread* has been added to the main ThreadsList.
        Publishing that JavaThread* early can lead to situations where the
        JavaThread* can be accessed/used before it is protected by a
        ThreadsListHandle which is not safe.

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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-8311607 store a JavaThread* in the java.lang.Thread object after the JavaThread* is added to the main ThreadsList

            • 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-8312363 store a JavaThread* in the java.lang.Thread object after the JavaThread* is added to the main ThreadsList

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

            Bug - A problem which impairs or prevents the functions of the product. JDK-8305670 Performance regression in LockSupport.unpark with lots of idle threads

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

            Commit Commit openjdk/jdk17u-dev/86e88878

            Commit Commit openjdk/jdk/ceca198e

            Review Review openjdk/jdk17u-dev/1587

            Review Review openjdk/jdk/13723

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                dcubed Daniel Daugherty
                dcubed Daniel Daugherty
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                Dates

                  Created:
                  Updated:
                  Resolved: