linux-kernel - Re: [RFC 0/3] perf tools: Show time info (v1)

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Message-ID: <87bo0yoe75.fsf@sejong.aot.lge.com>
Date:	Tue, 03 Dec 2013 11:34:06 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Andi Kleen <andi@...stfloor.org>
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>,
	Jiri Olsa <jolsa@...hat.com>, David Ahern <dsahern@...il.com>,
	Stephane Eranian <eranian@...gle.com>,
	Pekka Enberg <penberg@...nel.org>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: [RFC 0/3] perf tools: Show time info (v1)

Hi Andi,

On Mon, 2 Dec 2013 18:04:48 +0100, Andi Kleen wrote:
> On Mon, Dec 02, 2013 at 03:53:16PM +0900, Namhyung Kim wrote:
>> Hi,
>> 
>> Sometimes users might want to see time information along with the
>> performance result but the perf cannot provide it currently.
>> 
>> In this patchset, I added such feature using sample->time.  When the
>> perf processes sample events, it calculate time info and update last
>> timestamp.  It keeps the last timestamp for each evsel (and for each
>> cpu if it's a per-cpu session).
>
> Does the sorting on arbitary fields work now?
>
> I believe to make use of this you totally want to sort on it too,
> but traditionally perf report could only sort on a single field.
>
> Without sorting adding more and more fields is just confusing. 

Yeah, that's the plan that I also have.  As Ingo requested, we'll have
more flexible field and sort-key selection options.  I'll work on that
as soon as the on-going works find their way to inclusion.

Thanks,
Namhyung
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