Subject: Re: Using splsched()
To: Ignatios Souvatzis <ignatios@theory.cs.uni-bonn.de>
From: Chris G. Demetriou <cgd@pa.dec.com>
List: tech-kern
Date: 11/14/1997 11:55:02
> Eduardo Horvath says:
> 
> > For kernel profiling you still need to build a profiling kernel and add
> > code to function entry and exits, don't you? 
> 
> No. You just need to start a timer which, periodically:

Right.  That gets you # ticks / pc (-> function).

Buuilding the profiling kernel gets you call graphs, etc.


It's often ... Hard to make sense out of the raw time/function
information without information about who's calling it...
(In addition, the call graph information often makes finding gross
problems with the profiling run itself easier, so you don't go chasing
after non-problems.)



cgd