More DTrace envy

> As fast as things are developing we aren't a long way off. This isn't 
fud, only facts people.

I don't want to be pessimistic, but Utrace seems still work in progress, 
only the very first patchset from it has gotten to upstream, it supports 
well only x86 & powerPC and rest of it's still being designed.  See the 
latest status report:
http://www.redhat.com/archives/utrace-devel/2008-July/mht...

I think it's at least a year until it's fully (API stabilized etc) in 
upstream kernel with Systemtap supporting it well, a good set of tapsets, 
useful scripts, documentation and some GUIs (Mortadelo and Stapgui lack a 
lot of things).

This is what Apple is already doing with DTrace:
http://developer.apple.com/documentation/developertools/C...

And before that their developers already had Shark (which AFAIK doesn't 
use DTrace):
http://developer.apple.com/tools/performance/optimizingwi...

Btw. the Tracing Summit in Canada earlier this year produced fairly good 
overview of the state of tracing tools currently (also elsewhere than on 
x86):
https://ltt.polymtl.ca/tracingwiki/index.php/TracingBook