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From: Andrew Theurer <habanero@us.ibm.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Subject: Re: Linux 2.4.19-rc3 (hyperthreading)
Date: Mon, 29 Jul 2002 18:42:16 -0500
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Cc: linux-kernel@vger.kernel.org, Marcelo Tosatti <marcelo@conectiva.com.br>
References: <200207291454.30076.habanero@us.ibm.com> <200207291558.47266.habanero@us.ibm.com> <1027989445.4050.28.camel@irongate.swansea.linux.org.uk>
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On Monday 29 July 2002 7:37 pm, Alan Cox wrote:
> On Mon, 2002-07-29 at 21:58, Andrew Theurer wrote:
> > Agreed, we need some sort of irqbalance, and I intend to test with Ingo's
> > and Andrea's approaches. With that addition, I may even see an
> > improvement with hyperthreading. But for an rc release, I think it would
> > be prudent to revert the "new code" for default hyperthreading behavior,
> > and attack the whole problem in 2.4.20 or later release.
>
> Because your personal workload is slower ?

Well, I would think some here would be interested in samba performance.   
However, If 4-way P4 systems are considered rare at this point I guess it's 
not important enough to revert.  FYI, after testing 2P with and without 
hyperthreading, it's much faster.  481 Mbps for no hyperthreading and 605 
Mbps with.  If I can get even close to that improvement with 4 processors, 
I'll be very happy.   

-Andrew Theurer

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