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  1. JDK
  2. JDK-8284533

Improve InterpreterCodelet data footprint

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    • b18

    Backports

      Description

        Current InterpreterCodelet lays the field in inefficient order:

        sizeof: 24
        _size: @0
        _description: @8
        _bytecode: @16

        Stub generation aligns codelets and their related code at CodeEntryAlignment, which means with CEA=16 we are taking two CEA units for InterpreterCodelet data. Rearranging the fields a bit improves the interpreter code density a bit, dropping its sizeof to 16 and thus taking one CEA unit.

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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-8297212 Improve InterpreterCodelet data footprint

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

            Enhancement - null JDK-8284578 Relax InterpreterCodelet stub alignment

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

            Commit Commit openjdk/jdk17u-dev/32aec436

            Commit Commit openjdk/jdk/61698bd1

            Review Review openjdk/jdk17u-dev/878

            Review Review openjdk/jdk/8147

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                shade Aleksey Shipilev
                shade Aleksey Shipilev
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