Regressions in systemgc.NoObjects and AllDead due JEP-516

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    • Type: Bug
    • Resolution: Not an Issue
    • Priority: P4
    • None
    • Affects Version/s: 26
    • Component/s: hotspot
    • None
    • gc
    • b24
    • generic
    • generic

      JEP 516 allows enabling archived objects from CDS in non-G1 GC. When this is enabled, for example when running with ZGC, we see significant (up to 34%) regressions in microbenchmarks testing System.gc() on mostly empty heaps:
       
      org.openjdk.bench.vm.gc.systemgc.NoObjects
      org.openjdk.bench.vm.gc.systemgc.AllDead

            Assignee:
            Unassigned
            Reporter:
            Claes Redestad
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              Created:
              Updated:
              Resolved: