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  1. JDK
  2. JDK-8240872

Shenandoah: Avoid updating new regions from start of evacuation

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    • Subcomponent:
      gc
    • Resolved In Build:
      b15
    • CPU:
      generic
    • OS:
      generic

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        Description

        Currently, we set the safe-iteration-limit at start of update-refs-phase. This is subsequently used as limit for the linear scan in update-refs phase. However, with the strong invariant we can do better: we can set this limit at evac-start, because it is guaranteed that any reference that is written to the new fields is to-space and does not require updating.

        An exception is new allocations for evacuated objects: those still require updates and thus require special handling.

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                Assignee:
                rkennke Roman Kennke
                Reporter:
                rkennke Roman Kennke
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