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  1. JDK
  2. JDK-8317007

Add bulk removal of dead nmethods during class unloading

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    • gc
    • b03

    Backports

      Description

        Currently during class unloading dead nmethods are removed one by one as the nmethods are unloaded.
        Since this unregistering is serial, it would be nice to have this operation done in parallel and in bulk to improve pause time performance.

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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-8329618 Add bulk removal of dead nmethods during class unloading

            • 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-8331768 Add bulk removal of dead nmethods during class unloading

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

            Enhancement - null JDK-8320067 Parallel: Parallelize code root remembered set dead nmethod removal

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

            Enhancement - null JDK-8315503 G1: Code root scan causes long GC pauses due to imbalanced iteration

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

            Enhancement - null JDK-8317809 Insertion of free code blobs into code cache can be very slow during class unloading

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

            Bug - A problem which impairs or prevents the functions of the product. JDK-8326092 Pause Remark sometimes has extremely long pause times on class unloading

            • P2 - Crashes, loss of data, severe memory leak.
            • Closed
            links to

            Commit Commit openjdk/jdk21u-dev/92b43c57

            Commit Commit openjdk/jdk/f5538195

            Review Review openjdk/jdk21u-dev/548

            Review Review openjdk/jdk/16767

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                tschatzl Thomas Schatzl
                tschatzl Thomas Schatzl
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                  Created:
                  Updated:
                  Resolved: