[Jikesrvm-issues] [jira] Created: (RVM-168) Rework MMTk slow lock detection to mostly use VM_Time.cycles and only call VM_TIme.nanoTime when it looks like the lock operation might be slow

[David G. (JIRA) <ji...@co...>]

Rework MMTk slow lock detection to mostly use VM_Time.cycles and only call VM_TIme.nanoTime when it looks like the lock operation might be slow
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                 Key: RVM-168
                 URL: http://jira.codehaus.org/browse/RVM-168
             Project: RVM
          Issue Type: Sub-task
            Reporter: David Grove


Restructure so that initially the locking code uses VM_Time.cycles.  If the wait time exceeds N cycles, then switch over to nanoTime based timing to decide that the lock _really_ is slow and do appropriate performance warning and/or deadlock action.  Must use nanoTime to take "real" action because cycles() is not monotonic.



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