Re: [PATCH 4/4] trace: profile all if conditionals

[Steven Rostedt]

On Sun, 23 Nov 2008, Andi Kleen wrote:
> Steven Rostedt <rostedt@xxxxxxxxxxx> writes:

> > This adds a significant amount of overhead and should only be used
> > by those analyzing their system.
> 
> Often this can be also done using CPU performance counters. Might 
> be a cheaper option. 

I'd love to add an option that could hook into any arch with HW support 
for this. We could dump out the same information, but just a different way 
to gather it.  But I'm still ignorant to the use of CPU performance 
counters and how to find which branch matches which if.

-- Steve

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