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  1. JDK
  2. JDK-8037344

Use the "next" field to iterate over fine remembered instead of using the hash table

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    • gc
    • b12

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      Description

        JDK-7182260 linked together all PerRegionTable data structure (representing parts of the fine remembered set) of a fine remembered set for a particular region.

        The remembered set iterator has not been adapted to this change, still using the hash table and collision list to iterate over the fine remembered set.

        Change this, as iterating over the direct links is faster than going through the hash table: also micro benchmarks (doing nothing per card) show good improvements in overall iteration time.

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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-8040673 Use the "next" field to iterate over fine remembered instead of using the hash table

            • 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-8063506 Use the "next" field to iterate over fine remembered instead of using the hash table

            • 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-8070791 Use the "next" field to iterate over fine remembered instead of using the hash table

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

            Enhancement - null JDK-7182260 G1: Fine grain RSet freeing bottleneck

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

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                tschatzl Thomas Schatzl
                tschatzl Thomas Schatzl
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