On Wed, 15 Mar 2006, Stuart Williams wrote:
Someone asked a question during last night's presentation by Willem van Schaik regarding dtrace's ability to instrument user code. The answer as I understood it was that dtrace can't do that, that it can only trace OS events.
Check out this guy's site for lots of dtrace stuff
There's even an apache module to implement dtrace hooks, so you can write a D script to monitor usage.
Sean