Message-ID: <4AA6A46E.1050809@arcor.de>
Date: Tue, 08 Sep 2009 21:37:34 +0300
From: Nikos Chantziaras <realnc@arcor.de>
Organization: Lucas Barks
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To: Serge Belyshev <belyshev@depni.sinp.msu.ru>
CC: Ingo Molnar <mingo@elte.hu>, Con Kolivas <kernel@kolivas.org>,
       linux-kernel@vger.kernel.org, Peter Zijlstra <a.p.zijlstra@chello.nl>,
       Mike Galbraith <efault@gmx.de>
Subject: Re: Epic regression in throughput since v2.6.23
References: <20090906205952.GA6516@elte.hu> <87hbvdiogq.fsf@depni.sinp.msu.ru>
In-Reply-To: <87hbvdiogq.fsf@depni.sinp.msu.ru>
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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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