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  1. JDK
  2. JDK-8321269

Require platforms to define DEFAULT_CACHE_LINE_SIZE

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    • b27

    Backports

      Description

        Found it while doing new code that wants to know the cache line size.

        Currently, there is a fallback in globalDefinitions.hpp that defaults DEFAULT_CACHE_LINE_SIZE to 64 if platform does not define it. Instead of relying on default, force platform definitions to tell what is the reasonable default for the platform. This would simplify porting to other architectures.

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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-8324622 Require platforms to define DEFAULT_CACHE_LINE_SIZE

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

            Enhancement - null JDK-8237842 Separate definitions for default cache line and padding sizes

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

            Commit Commit openjdk/jdk21u-dev/34d97ab1

            Commit Commit openjdk/jdk/a56286f7

            Review Review openjdk/jdk21u-dev/150

            Review Review openjdk/jdk/16948

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                shade Aleksey Shipilev
                shade Aleksey Shipilev
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                  Updated:
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