Profiling thread sync lock contention

Question

In the past I've used performance profiling tools such as nprof, Equatec profiler and Yourkit profiler to identify and remove/reduce performance bottlenecks in code mostly running in one thread (serialized execution). Nowadays I write a lot of multi-threaded code which can be slowed down by lock contention; what tools and tricks can be used to identify where lock contention is occuring and by how much?

Answer 1

This is available soon, currently shipping in Visual Studio 2010 beta 2. Here's a video of the tool.