[Mono-bugs] [Bug 670791] New: Fast path for lock() needed in the 4.0 profile

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https://bugzilla.novell.com/show_bug.cgi?id=670791

https://bugzilla.novell.com/show_bug.cgi?id=670791#c0


           Summary: Fast path for lock() needed in the 4.0 profile
    Classification: Mono
           Product: Mono: Runtime
           Version: SVN
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: JIT
        AssignedTo: lupus at novell.com
        ReportedBy: gonzalo at novell.com
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---
           Blocker: ---


We need the equivalent of the current mono_monitor_get_fast_enter_method()
adapted to the overload used in 4.0.

The "try_enter_with_atomic_var" 4.0 method is showing up a lot in the 'lock
contention' reports with simple xsp4 tests. (perf hit is ~12%).

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