linux-kernel - Re: [PATCH 12/14] perf ftrace: Use pager for displaying result

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Message-ID: <87ip2w98nl.fsf@sejong.aot.lge.com>
Date:	Mon, 06 May 2013 10:52:46 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...nel.org>,
	Namhyung Kim <namhyung.kim@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	David Ahern <dsahern@...il.com>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 12/14] perf ftrace: Use pager for displaying result

On Fri, 26 Apr 2013 10:40:23 +0200, Jiri Olsa wrote:
> On Thu, Apr 25, 2013 at 03:50:45PM +0900, Namhyung Kim wrote:
>> On Wed, 24 Apr 2013 16:17:24 +0200, Jiri Olsa wrote:
>> > On Tue, Apr 23, 2013 at 05:31:10PM +0900, Namhyung Kim wrote:
>> >> From: Namhyung Kim <namhyung.kim@....com>
>> >> 
>> >> It's convenient to use pager when seeing many lines of result.
>> >> 
>> > for some reason I'm able to get any output for 'live' command only
>> > when using --no-pager option. I dont get any data for:
>> >
>> >   # ./perf ftrace live ls
>> >
>> >   not even ls output
>
> ok, now with your patch I get allways ls output correctly in pager

"ls output" only?  What about the ftrace outputs?

>
>> >
>> > But sometime I dont even get ftrace output for:
>> >
>> >   # ./perf --no-pager ftrace live ls
>> >
>> >   just ls output
>
> this one still persists

Hmm.. still hard to reproduce.. :(

As it's --no-pager mode, so that it can be reproduced for you without
this patch, right?

Thanks,
Namhyung
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