linux-kernel - Re: [RFC PATCHv3] perf tools: add event grouping capability to "perf stat"

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Message-ID: <20101125081008.GE2538@nowhere>
Date:	Thu, 25 Nov 2010 09:10:11 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
	Paul Mackerras <paulus@...ba.org>, Ingo Molnar <mingo@...e.hu>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Stephane Eranian <eranian@...gle.com>,
	Julia Lawall <julia@...u.dk>, Tom Zanussi <tzanussi@...il.com>,
	linux-kernel@...r.kernel.org, Matt Fleming <matt@...sole-pimps.org>
Subject: Re: [RFC PATCHv3] perf tools: add event grouping capability to
 "perf stat"

On Thu, Nov 25, 2010 at 09:00:09AM +0100, Peter Zijlstra wrote:
> On Thu, 2010-11-25 at 08:46 +0100, Frederic Weisbecker wrote:
> > > perf record -e task-clock:freq=1000,cycles:period=0
> > 
> > Wouldn't this syntax clash with the flags we have on events already?
> > 
> > the u,k,p flags? 
> 
> From stephane's email (to which you were CC'ed) http://lkml.org/lkml/2010/11/23/303

Right, I'm going look at this.

 
> > $ perf record -e cycles:u:period=100000,instructions:k:freq=1500 -a -- sleep 5
> 
> The parser isn't particularly pretty, maybe its time to think about a parser generator?

May be yeah.
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