DTrace for FreeBSD - Status Update

[gnn at FreeBSD.org]

Excellent!

But, I have a naive question.  Should this be integrated in some way
with the hwpmc work of Joseph Koshy since I think it could be useful
for DTRace to get information from the CPU as well.

Is there a quick "HOw to use DTRace" anywhere?  I'd like to use it in
my networking stuff when I get to the point of caring more about
performance than correctness.

Thanks,
George