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  1. JikesRVM
  2. RVM-459

Race in setting mark bits for Immix

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Medium
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 3.0
    • Component/s: None
    • Labels:
      None

      Description

      The trace object code for immix currently has a race in the case where an object is to be copied (not in the common non-copying case). The waiting thread assumes that the object will have been forwarded, but in fact if space is exhausted the first thread won't have forwarded the object; just marked it in place. Should be trivial to fix. The bug shows up in StickyImmix (where there is much more copying), or in other benchmarks where there is lots of defragmentation. It fairly reliably shows up on a FullAdaptive build (assertions identify the problem) when running dacapo on a quad core.

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          dgrove David Grove created issue -
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          dgrove David Grove added a comment -

          pushing to 3.1 since I suspect Steve doesn't have bandwidth to handle these now.

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          dgrove David Grove added a comment - pushing to 3.1 since I suspect Steve doesn't have bandwidth to handle these now.
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          steveblackburn Steve Blackburn added a comment -

          Actually this was fixed back in r14175. My fault for not updating the JIRA!

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          steveblackburn Steve Blackburn added a comment - Actually this was fixed back in r14175. My fault for not updating the JIRA!
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          dgrove David Grove added a comment -

          reopening to change fix-for target.

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          dgrove David Grove added a comment - reopening to change fix-for target.
          dgrove David Grove made changes -
          Field Original Value New Value
          Workflow jira [ 17746 ] X10 Workflow [ 18918 ]
          dgrove David Grove made changes -
          Priority Major [ 6 ] Medium [ 3 ]

            People

            • Assignee:
              steveblackburn Steve Blackburn
              Reporter:
              steveblackburn Steve Blackburn
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              Dates

              • Created:
                Updated:
                Resolved: