enabling hyper-threading on intel dual-core

[OxY]

thanks a lot for your help!

----- Original Message ----- 
From: "Shane Ambler" <Shane at 007Marketing.com>
To: "FreeBSD Mailing Lists" <freebsd-performance at freebsd.org>
Sent: Thursday, May 11, 2006 7:34 PM
Subject: Re: enabling hyper-threading on intel dual-core


> On 12/5/2006 1:30, "OxY" <oxy at 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 at 007Marketing.com
>
>
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