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  1. JDK
  2. JDK-8035815

Cache-align and pad the from card cache

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    • gc
    • b08

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      Description

        The fast card cache is a very frequently accessed data structure.

        It is basically a 2d array of per-region values (for every thread) that contain the recently card within that region that has been put into the remembered set.

        This 2d array, nor its per-thread components are not aligned to cache lines or padded in any way to avoid false sharing.

        Fix this.

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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-8038248 Cache-align and pad the from card cache

            • 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-8045277 Cache-align and pad the from card cache

            • 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-8053393 Cache-align and pad the from card cache

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

            Enhancement - null JDK-8027295 Free CSet takes ~50% of young pause time

            • 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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                  Updated:
                  Resolved: