linux-kernel - Re: [RFC/PATCHSET 00/37] perf tools: Speed-up perf report by using multi thread (v1)

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Message-ID: <20150108051933.GB7268@sejong>
Date:	Thu, 8 Jan 2015 14:19:33 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Jiri Olsa <jolsa@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: [RFC/PATCHSET 00/37] perf tools: Speed-up perf report by using
 multi thread (v1)

On Wed, Jan 07, 2015 at 10:14:56AM -0500, Stephane Eranian wrote:
> On Wed, Jan 7, 2015 at 2:13 AM, Namhyung Kim <namhyung@...nel.org> wrote:
> > Hi Stephane,
> >
> > On Tue, Jan 06, 2015 at 10:50:44AM -0500, Stephane Eranian wrote:
> >> We use the pipe mode a lot and this would not work there. So no,
> >> I don't like the 2 files solution. But I like the idea of using multiple
> >> threads to speed up processing.
> >
> > Actually it's not 2 files, it's 1 + N files. :)  Anyway, I think the
> > single file + index approach requires seeking to process them, is it
> > ok for pipe-mode?
> >
> There is no seek possible in pipe mode.
> 
> The way this is done (as I remember) is by creating pseudo-record types
> and injecting them in the stream.

Right.  But I have no idea how I can index a live stream and process
it using multiple threads.

Thanks,
Namhyung
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