Date: Wed, 11 Jun 2003 19:04:35 +0100 (BST)
From: Tigran Aivazian <tigran@veritas.com>
To: Artemio <artemio@artemio.net>
cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: SMP question
In-Reply-To: <200306112043.11923.artemio@artemio.net>
Message-ID: <Pine.LNX.4.44.0306111857210.2560-100000@einstein31.homenet>
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Hello Artemio,

SMP kernel doesn't run "faster" than a UP one, as such, but enabling SMP
support will allow you to make use of your 3 extra CPUs, e.g. by multiple
user applications at the same time, or by various tasks performed inside
the kernel. So, if you have more than one CPU definitely enable SMP
support, unless this causes your system to hang (in which case it's a bug
and you are expected to send a bugfix to this list)

Regards
Tigran

On Wed, 11 Jun 2003, Artemio wrote:

> Hello!
> 
> I have the following question.
> 
> My system is 2x 2.4Ghz Xeons.
> 
> Linux kernel 2.4.18 compiled with SMP support sees it as four processors. 
> SMP-disabled kernel sees one, of course.
> 
> I would like to know, how will it influence the system performance, if I run a 
> UP kernel?
> 
> What does the kernel SMP support add? Just some API for additinal 
> multiprocessor control? Will the SMP-enabled kernel run faster than the UP 
> one?
> 
> That's what I would like to know.
> 
> 
> 
> Thanks!
> 
> 
> Artemio.
> 
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