I apologize if this isn't the right place for this discussion, but I can't find 
a better place to post this question. If anyone can point me to a better forum, 
please do.

I have started playing with Instruments (comes with XCode), which is basically 
a very pretty front end to DTrace. It has an "instrument" called "Thread 
States", that look a lot like the screen shots of the netbeans dtrace plugin 
microthread states thing.

Anyway it lists a number of potential states (Unknown, Waiting, Suspended, 
Requested to suspend, Running, On run queue, Waiting uninteruptibly, At 
termination, Idling Processor). I can't find any detailed description of what 
these states mean. In particular I grew a bit dubious about my assumed 
interpretations when I found a point in the trace that showed 7 threads in the 
running state (on a dual core mac mini).
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