linux-kernel - Re: Reading perf counters at ftrace trace boundaries

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Message-ID: <5208419E.2000605@opersys.com>
Date:	Sun, 11 Aug 2013 22:59:58 -0300
From:	Karim Yaghmour <karim.yaghmour@...rsys.com>
To:	Andi Kleen <andi@...stfloor.org>
CC:	linux-kernel@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>,
	mingo@...e.hu
Subject: Re: Reading perf counters at ftrace trace boundaries


On 13-08-11 10:47 PM, Andi Kleen wrote:
> That's what normal sampling already does.
> 
> If you're worried about systematic shadow effects just randomize a bit.

That's actually the point. I'd like to be able to study/compare both
approaches. I could be completely off, but I'd like to see if a divide
and conquer approach (i.e. based on ftrace) wouldn't take the guesswork
out of smart randomization. Just a hunch.

-- 
Karim Yaghmour
CEO - Opersys inc. / www.opersys.com
http://twitter.com/karimyaghmour

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