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  1. JDK
  2. JDK-8234768

Shenandoah: Streamline enqueueing runtime barriers

    Details

    • Subcomponent:
      gc
    • Resolved In Build:
      b25
    • CPU:
      generic
    • OS:
      generic

      Description

      Shenandoah's runtime barriers for SATB pre-date the GC interface, and have been very coarsly fitted into the new GC interfaces. It leaves room for improvements:
      - Rename methods to make more sense
      - Group enqueueing barrier methods together
      - Make them inlinable, including the ultimate enqueue() method
      - Avoid barriers on DEST_UNINITIALIZED pre-barriers
      - Benefit from static resolution of decorators when possible, and don't generate barriers at all in those cases

      As a bonus, add SATB and traversal store-value barriers to native oop stores. This is not doing anything now, but will enable concurrent roots scanning in the near future.

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            • Assignee:
              rkennke Roman Kennke
              Reporter:
              rkennke Roman Kennke
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              • Created:
                Updated:
                Resolved: