Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-8205908

Unnecessarily strong memory barriers in ParNewGeneration::copy_to_survivor_space

XMLWordPrintable

    • Icon: Enhancement Enhancement
    • Resolution: Not an Issue
    • Icon: P4 P4
    • tbd
    • 11
    • 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.

            Unassigned Unassigned
            mhorie Michihiro Horie
            Votes:
            0 Vote for this issue
            Watchers:
            3 Start watching this issue

              Created:
              Updated:
              Resolved: