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From: "Brian Jackson" <brian-kernel-list@mdrx.com>
To: "Scott Robert Ladd" <scott@coyotegulch.com>
Cc: "Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>
Subject: Re: /proc/cpuinfo and hyperthreading
Date: Mon, 16 Dec 2002 07:54:53 -0600
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You could always boot once with nosmp and run some benchmarks and then 
reboot (with smp) and run some more benchmarks, and see if there is a 
difference. 

 --Brian Jackson 


Scott Robert Ladd writes: 

> Zwane Mwaikambo wrote:
>> It's ok.
> 
> I'm not so sure. 
> 
> To get the most benefit from two logical CPUs, don't I need the kernel to
> operate as a 2-CPU SMP system? 
> 
> Windows XP initializes the system as SMP with two CPUs; when I run an OpenMP
> application under Windows, it reports two CPUs and a maximum of two threads.
> Under Linux, 
> 
> Linux SMP should initialize based on the number of logical CPUS, not the
> physical number of ships; thus, I should be seeing two CPUs in
> /proc/cpuinfo, not one. 
> 
> ..Scott 
> 
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