linux-kernel - Re: Epic regression in throughput since v2.6.23

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Message-ID: <4AA6A46E.1050809@arcor.de>
Date:	Tue, 08 Sep 2009 21:37:34 +0300
From:	Nikos Chantziaras <realnc@...or.de>
To:	Serge Belyshev <belyshev@...ni.sinp.msu.ru>
CC:	Ingo Molnar <mingo@...e.hu>, Con Kolivas <kernel@...ivas.org>,
	linux-kernel@...r.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Mike Galbraith <efault@....de>
Subject: Re: Epic regression in throughput since v2.6.23

On 09/08/2009 03:57 PM, Serge Belyshev wrote:
>
> Hi. I've done measurments of time taken by make -j4 kernel build
> on a quadcore box.  Results are interesting: mainline kernel
> has regressed since v2.6.23 release by more than 10%.

It seems more people are starting to confirm this issue:

   http://foldingforum.org/viewtopic.php?f=44&t=11336

IMHO it's not *that* dramatic as some people there describe it ("Is it 
the holy grail?") but if something makes your desktop "smooth as silk" 
just like that, it might seem as a holy grail ;)  In any case, there 
clearly seems to be a performance problem with the mainline scheduler on 
many people's desktops that are being solved by BFS.
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