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  1. JDK
  2. JDK-8324933

ConcurrentHashTable::statistics_calculate synchronization is expensive

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      Description

        In the ConcurrentHashTable::statistics_calculate function, we enter and exit a ScopedCS with the global counter for every single bucket. This has showed up to be pretty intense on some machines. We should make the synchronization a bit less intense here.

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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-8327339 ConcurrentHashTable::statistics_calculate synchronization is expensive

            • 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-8327451 ConcurrentHashTable::statistics_calculate synchronization is expensive

            • 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-8330776 ConcurrentHashTable::statistics_calculate synchronization is expensive

            • 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-8331107 ConcurrentHashTable::statistics_calculate synchronization is expensive

            • 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-8333636 ConcurrentHashTable::statistics_calculate synchronization is expensive

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

            Commit Commit openjdk/jdk17u-dev/d1e909fd

            Commit Commit openjdk/jdk21u-dev/68d0925b

            Commit Commit openjdk/jdk22u/ccb1a3ed

            Commit Commit openjdk/jdk/0e2fdc95

            Review Review openjdk/jdk17u-dev/2512

            Review Review openjdk/jdk21u-dev/524

            Review Review openjdk/jdk22u/154

            Review Review openjdk/jdk/17629

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                eosterlund Erik Österlund
                eosterlund Erik Österlund
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