linux-kernel - Re: [BUG] perf top: --stdio causes continuous refresh

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Message-ID: <20140206135627.GA26955@infradead.org>
Date:	Thu, 6 Feb 2014 11:56:27 -0200
From:	Arnaldo Carvalho de Melo <acme@...hat.com>
To:	Stephane Eranian <eranian@...gle.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

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:

[root@...andy ~]# perf --version
perf version 3.13.g1da187

Also it honours --delay, i.e.

# perf top --delay 5 --stdio

it will wait 5 seconds between refreshes, etc.

Checking out v3.14-rc1 now.

- Arnaldo
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