Unnecessarily strong memory barriers in ParNewGeneration::copy_to_survivor_space

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    • Type: Enhancement
    • Resolution: Not an Issue
    • Priority: P4
    • tbd
    • Affects Version/s: 11
    • Component/s: hotspot
    • gc
    • ppc

      In ParNewGeneration::copy_to_survivor_space for CMS GC, there are two paths of copying objects: copying an object after a CAS succeeds or copying an object before another CAS. Although full fences are used before and after the CAS, they are stronger than needed. I would like to raise this problem as a performance bug for PPC64.

            Assignee:
            Unassigned
            Reporter:
            Michihiro Horie
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              Created:
              Updated:
              Resolved: