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

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Message-ID: <20150108145210.GY2915@two.firstfloor.org>
Date:	Thu, 8 Jan 2015 15:52:10 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Namhyung Kim <namhyung@...nel.org>
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>,
	Stephane Eranian <eranian@...gle.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)

> > Isn't it fast enough to have a single thread that pre scans
> > the events (perhaps with some single-thread optimizations
> > like vectorization), and then load balances the work to
> > a thread pool?
> 
> I don't understand it.  Could you please elaborate it?

Have a thread pool. Then there is a single thread which pre-processes
events and puts them into queues, which are then processed in parallel
by the threads in the thread pool.


-Andi
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