[Tfug] Dual cores and hyperthreading

[Brian Masur]

Anyone, correct me if I'm wrong, but should it not have a performance hit or 
any other problems if John leaves in support for both SMP and HT in the 
kernel?  From what I remember it will have support for HT but just won't 
turn it on if it's not available in the hardware.  If so, I would leave them 
both in there (especially SMP).

Brian


>From: John Gruenenfelder <johng at as.arizona.edu>
>Reply-To: Tucson Free Unix Group <tfug at tfug.org>
>To: Tucson Free Unix Group <tfug at tfug.org>
>Subject: Re: [Tfug] Dual cores and hyperthreading
>Date: Sat, 19 Aug 2006 21:45:38 -0700
>
>On Sat, Aug 19, 2006 at 09:27:08PM -0700, Harry McGregor wrote:
> >>
> >Core Duo (not Core 2 Duo) does not support Hyper Threading.  Also, it's
> >not a Pentium 4 base, it's a P6 base.  The Core Duo, is an evolution of
> >the Pentium M, which was a Pentium III with the P4 bus, and a few other
> >nice things.  The PIII was of course a PII with SSE, and the PII was a
> >Pentium Pro with it's cache moved onto a card instead of being a multi
> >chip module.
> >
> >The P4 (aka netburst) really should be NetBUST, Intel tried for high GHz
> >and failed.  They were estimating 4.5GHz by now on 90nm, and they were
> >not even able to make 3.8GHz on 65nm.
> >
> >Core 2 Duo (aka Conroe) supports HT IIRC.  Laptop version should be out
> >soon.
>
>Ah... thanks for clearing that up.  Guess I'll have to change that setting
>next time I need to compile the kernel.
>
>
>--
>--John Gruenenfelder    Research Assistant, UMass Amherst student
>                         Systems Manager, MKS Imaging Technology, LLC.
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>         --Sam of Sam & Max
>
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