linux-kernel - Re: [PATCH 1/3] perf tool: precise mode requires exclude

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Date:	Wed, 12 Sep 2012 11:50:57 -0700
From:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
To:	Robert Richter <robert.richter@....com>
Cc:	David Ahern <dsahern@...il.com>, linux-kernel@...r.kernel.org,
	peterz@...radead.org, Ingo Molnar <mingo@...nel.org>,
	Gleb Natapov <gleb@...hat.com>, Avi Kivity <avi@...hat.com>
Subject: Re: [PATCH 1/3] perf tool: precise mode requires exclude_guest

Em Wed, Sep 12, 2012 at 07:46:55PM +0200, Robert Richter escreveu:
> On 12.09.12 09:16:28, David Ahern wrote:
> > 
> > Kernel side AMD currently ignores all exclude_* bits, so there is no impact
> > to existing IBS code paths. Robert Richter has a patch where IBS code will
> > return EINVAL if an exclude_* bit is set. When this goes in it means use
> > of :p on AMD with IBS will first fail with EINVAL (because exclude_guest
> > will be set). Then the existing fallback code within perf will unset
> > exclude_guest and try again. The second attempt will succeed if the CPU
> > supports IBS profiling.
> > 
> > Signed-off-by: David Ahern <dsahern@...il.com>
> > Cc: Ingo Molnar <mingo@...nel.org>
> > Cc: Peter Zijlstra <peterz@...radead.org>
> > Cc: Robert Richter <robert.richter@....com>
> > Cc: Gleb Natapov <gleb@...hat.com>
> > Cc: Avi Kivity <avi@...hat.com>
> > Link: https://lkml.org/lkml/2012/7/9/264
> > ---
> >  tools/perf/util/parse-events.c |    3 +++
> >  1 file changed, 3 insertions(+)
> 
> Acked-by: Robert Richter <robert.richter@....com>
> 
> I tested the patch set with AMD IBS and it works fine.

Ok, I think that in this specific patchset I can add:

Tested-by: Robert Richter <robert.richter@....com>
Reviewed-by: Robert Richter <robert.richter@....com>

Instead of an Acked-by, may I?

- Arnaldo
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