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  1. JDK
  2. JDK-8146991

Introduce per-worker preserved mark stacks in ParallelGC

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    • Icon: Enhancement Enhancement
    • Resolution: Fixed
    • Icon: P4 P4
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    • gc
    • b115
    • generic
    • generic

      In ParallelGC, pushes to the (single, and shared among GC workers) preserved mark stack are guarded by a lock. If many marks need to be preserved during a GC with promotion failure, this can cause a lot of contention and a big scalability bottleneck, resulting in unreasonably long GCs.

      We should introduce per-worker preserved mark stacks (similarly to what was done in G1) to eliminate this issue.

            tonyp Tony Printezis
            tonyp Tony Printezis
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