From owner-freebsd-performance@FreeBSD.ORG  Thu May 11 17:35:03 2006
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Date: Fri, 12 May 2006 03:04:59 +0930
From: Shane Ambler <Shane@007Marketing.com>
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Subject: Re: enabling hyper-threading on intel dual-core
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On 12/5/2006 1:30, "OxY" <oxy@field.hu> wrote:

> hi!
> 
> i just bought an Intel Pentium D-930 (3ghz dual-core)
> and wonder why i just only have CPU0 and CPU1, when i compile with SMP...
> 
> sysctl says:
> machdep.cpu_idle_hlt: 0
> 
> is it right or i should see CPU 2 and 3 starting during the boot?
> 
> thanks for your help!
> 
> ps: i even compiled this option in kernel, can't see any change
> 
> options         MPTABLE_FORCE_HTT       # Enable HTT CPUs with the MP Table
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> 

Sounds right to me - the 930 is a dual core and will show up as two cpu's
cpu0 and cpu1.

The early dual core's don't support hyperthreading - the Pentium-D  extreme
edition does (Pentium D-955 at 3.46Ghz is one) and will show up as 4 cpu's.
Currently at 3x the price.


-- 

Shane Ambler
Shane@007Marketing.com