Re: Pentium D CPUs and SMP support

From: Roberto C. Sanchez (roberto_at_familiasanchez.net)
Date: 11/09/05

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    Date: Wed, 9 Nov 2005 14:02:18 -0500
To: Robert Cates <robert@kormar.de>

    On Wed, Nov 09, 2005 at 07:02:27PM +0100, Robert Cates wrote:
    > Hi,
    >
    > today I booted Knoppix LiveCD 4.0 (based on Debian, with kernel 2.6.11) on
    > an Sony PC with an ATI grachics chip to see how the X-server identified and
    > configured itself for the ATI (with no really clear answer, but it did not
    > seem to use an "ati" driver), but then I thought I would check if the kernel
    > was loaded with SMP since the CPU was a Pentium D 820. KDE's Kinfo clearly
    > showed there being 2 CPUs - CPU 0 and CPU 1, but there was nothing actually
    > showing a kernel with SMP support was running.
    >
    > What I'm wondering is:
    >
    > 1) Are the new (dual core) Pentium D and AMD x2 CPUs handled differently in
    > terms of SMP than the tranditional 2 CPU (SMP) setups we've had upto now?
    >
    No.

    > 2) I know the kernels anyway need to be compiled with SMP support, so maybe
    > the Knoppix LiveCD is (does anybody know for sure?), but I know that my 2
    > CPU (Pentium 3) system with Debian 3.1 shows that it is a kernel with SMP
    > support and also needs an IRQ balancer for example, which I did not see on
    > this Pentium D system.
    >
    The Knoppix CD does not have an SMP kernel.

    > 3) Is it that the new dual core CPUs being on one chip/socket are handled
    > different and do not need an IRQ balancer?
    >
    No.

    -Roberto 

    -- 
Roberto C. Sanchez
http://familiasanchez.net/~roberto



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