GenShen: Replace atomic promotion failure counters with thread local variables

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    • Type: Enhancement
    • Resolution: Unresolved
    • Priority: P4
    • None
    • Affects Version/s: 27
    • Component/s: hotspot
    • None
    • gc
    • In Review

      The atomic counters caused a serious performance regression for failed promotions.

      This change also combines the plab fields from `ShenandoahThreadLocalData` with the associated plab methods from `ShenandoahGenerationalHeap` into a more cohesive `ShenandoahPLAB` class.

            Assignee:
            William Kemper
            Reporter:
            William Kemper
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              Created:
              Updated: