[dtrace-discuss] Re: Access hardware counters with DTrace

[Paul van den Bogaard]

So lets continue on this thread:

the URL requested:
http://www.opensolaris.org/jive/thread.jspa?messageID=3756&#3756

As Jon explained it is indeed the context that the events are happening that might be extremely helpfull here. I know I have L2 misses. Not a clue what's causing this. Same holds for all other samplers available. System wide statistisc do not enable easy drill down to the application(s) that are causing it. It is even a bigger challenge to determine why they are causing this.
Since most apps do not have appropriate instrumentation build in --and most who do, don't have docs helping you to understand which knobs, if any, there are in order to fiddle with it. So the
next best thing is a util like DTrace. 

--Paul
 
 
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