linux-kernel - Re: [RFC][PATCH 1/2] perf: Add 'perf kmem' tool

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Message-ID: <20091123175330.GA29396@elte.hu>
Date:	Mon, 23 Nov 2009 18:53:30 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Pekka Enberg <penberg@...helsinki.fi>,
	Li Zefan <lizf@...fujitsu.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Eduard - Gabriel Munteanu <eduard.munteanu@...ux360.ro>,
	LKML <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>
Subject: Re: [RFC][PATCH 1/2] perf: Add 'perf kmem' tool


* Steven Rostedt <rostedt@...dmis.org> wrote:

> On Fri, 2009-11-20 at 11:49 +0100, Ingo Molnar wrote:
> > > 
> > > You're right, of course. With kmemtrace-user, I just copied the raw 
> > > trace file from /sys/kernel. I wonder if that's a good enough reason 
> > > to keep kmemtrace bits around?
> > 
> > Not really. If then a light-weight recording app could be made but 
> > i'd rather wait for actual usecases to pop up.
> 
> Hmm, but isn't this an actual use case?

Not really - perf record is pretty lightweight and you'd want perf for 
hands-on stats anyway.

	Ingo
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