linux-kernel - Re: [PATCH 1/2] perf tools: add event modifier to request exclusive PMU access

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Message-ID: <20121019160724.GE980@krava.brq.redhat.com>
Date:	Fri, 19 Oct 2012 18:07:25 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Andi Kleen <ak@...ux.intel.com>
Cc:	Stephane Eranian <eranian@...gle.com>,
	Peter Zijlstra <peterz@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"mingo@...e.hu" <mingo@...e.hu>,
	Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: Re: [PATCH 1/2] perf tools: add event modifier to request exclusive
 PMU access

On Fri, Oct 19, 2012 at 08:46:10AM -0700, Andi Kleen wrote:
> > That's what I thought too, but then I don't understand why it was at
> > eight before and not
> > seven: One instance of each letter, + a second for pp (precise=2). Or
> > am I missing
> > something here?
> 
> The number is pretty useless imho (it's unlikely to catch any real user error) 
> and most likely generates a much longer automata in flex than just a +
> So I would drop it.

yep, probably we could do better job with checking the modifier
after parsing (with just + in flex) ... added in my todo ;)

jirka
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