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Date:	Thu, 6 Feb 2014 16:24:07 +0100
From:	Stephane Eranian <eranian@...gle.com>
To:	Arnaldo Carvalho de Melo <acme@...hat.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	"mingo@...e.hu" <mingo@...e.hu>, Jiri Olsa <jolsa@...hat.com>,
	Eric Dumazet <edumazet@...gle.com>
Subject: Re: [BUG] perf top: --stdio causes continuous refresh

On Thu, Feb 6, 2014 at 3:09 PM, Arnaldo Carvalho de Melo
<acme@...hat.com> wrote:
> Em Thu, Feb 06, 2014 at 12:07:05PM -0200, Arnaldo Carvalho de Melo escreveu:
>> Em Thu, Feb 06, 2014 at 02:58:01PM +0100, Stephane Eranian escreveu:
>> > On Thu, Feb 6, 2014 at 2:56 PM, Arnaldo Carvalho de Melo
>> > <acme@...hat.com> wrote:
>> > > Em Wed, Feb 05, 2014 at 10:25:09PM +0100, Stephane Eranian escreveu:
>> > >> If you run perf top on 3.14 but you force --stdio mode, perf top
>> > >> goes crazy and constantly refreshes the output.
>>
>> > >> It does that with many older versions of the perf as well on 3.14.
>> > >> It runs fine with newt mode.
>>
>> > >> Works fine with my 3.11 kernel. So something must be broken
>> > >> with 3.14.
>>
>> > >> Can you reproduce the problem as well?
>>
>> > > Not so far, using my perf/urgent branch:
>>
>> > I am using tip.git. Or try 3.11, 3.10.
>
> But my tests are on top of:
>
> [acme@...andy linux]$ uname -r
> 3.11.4-101.fc18.x86_64
>
> I thought it was a 3.14ish one, building one to try there...
>
The kernel must be 3.14-rcX, the tool can be any version.

> - Arnaldo
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