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  1. JDK
  2. JDK-8280784

VM_Cleanup unnecessarily processes all thread oops

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        While looking at ZGC latencies in a benchmark with >20000 Java threads, I noticed that the Cleanup VM operation could take up to 500 ms. It turned out that the time was spent processing the oops in all Java threads. Since none of the safepoint cleanup tasks use the oops in the threads, I propose that we stop processing the oops in this VM Operation.

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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-8299905 VM_Cleanup unnecessarily processes all thread oops

            • 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-8301882 VM_Cleanup unnecessarily processes all thread oops

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

            Enhancement - null JDK-8280817 Clean up and unify empty VM operations

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

            Commit Commit openjdk/jdk17u-dev/fea38188

            Commit Commit openjdk/jdk/8a3cca09

            Review Review openjdk/jdk17u-dev/889

            Review Review openjdk/jdk/7246

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                stefank Stefan Karlsson
                stefank Stefan Karlsson
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