title: What type of diagram is best suited for visualizing threading issues such as contentions?
body: <p>While debugging an issue with our system, I have discovered a thread contention that is causing a bottleneck.  I need to explain the phenomenon to other people involved in handling this issue.  Some of them are not from development team (yet, they are reasonably technical).  So what type of diagrams can be used to depict threading issues such as contentions, deadlocks etc?  Some examples would be very useful.</p>