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  1. JDK
  2. JDK-8186042

Optimize OopMapCache lookup

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    Details

    • Type: Enhancement
    • Status: Resolved
    • Priority: P3
    • Resolution: Fixed
    • Affects Version/s: 10
    • Fix Version/s: 10
    • Component/s: hotspot
    • Labels:
      None
    • Subcomponent:
    • Resolved In Build:
      b22

      Description

      The OopMapCache::lookup function that returns the oopMap for a specific (Method, bci) takes out a Mutex to lookup for each entry on the stack.

      The OopMapCache holds bitmaps to indicate where oops are in the locals and expression stack for a method at bci for interpreter frames found on the stack during GC.

      Lock free access speeds up GC root processing for thread stacks.

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              Assignee:
              coleenp Coleen Phillimore
              Reporter:
              coleenp Coleen Phillimore
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                Updated:
                Resolved: