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). -- This message posted from opensolaris.org