Messages in this thread |  | | | Date | Sun, 23 Nov 2008 14:56:42 -0500 (EST) | | From | Steven Rostedt <> | | Subject | Re: [PATCH 4/4] trace: profile all if conditionals |
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On Sun, 23 Nov 2008, Andi Kleen wrote: > Steven Rostedt <rostedt@goodmis.org> 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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