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Date: Wed, 8 Jul 2015 11:56:56 -0300
From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Adrian Hunter <adrian.hunter@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>, Andi Kleen <ak@linux.intel.com>,
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        mathieu.poirier@linaro.org, Pawel Moll <pawel.moll@arm.com>
Subject: Re: [PATCH V3 1/4] perf: Add PERF_RECORD_SWITCH to indicate context
 switches
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Em Wed, Jul 08, 2015 at 04:42:03PM +0300, Adrian Hunter escreveu:
> On 08/07/15 16:28, Arnaldo Carvalho de Melo wrote:
> > Em Wed, Jul 08, 2015 at 12:52:40AM +0200, Peter Zijlstra escreveu:
> >> On Tue, Jul 07, 2015 at 01:13:59PM -0300, Arnaldo Carvalho de Melo wrote:
> >>> Em Tue, Jul 07, 2015 at 05:36:14PM +0200, Peter Zijlstra escreveu:
> >> I was just thinking that 2 records, each with a fixed layout would be
> >> easier to parse than 1 record with variable layout.

> >> The record space is immense, so from that point it really doesn't
> >> matter.

> > We could do a land grab at some point there, if/when we find some reason
> > for that... :-)

> >> Do whatever is easiest, less mistakes get made etc. :-)

> >> No real preference either way, as long we we've thought about it.

> > Right, I just don't want to have two u32 carrying -1 for no reason.

> So you'd be OK with 2 RECORD types?

Yeah, no problem.
 
> I will see what is involved.

Ok.

- Arnaldo