AMD 64 Dual Core only using one Core (was Re: Going from i386 AMD 64 Dual Core)

[Ben Edwards]

On 09/04/07, Matthew Flaschen <matthew.flaschen at gatech.edu> wrote:
> Rashkae wrote:
> > Ben Edwards wrote:
> >>
> >> Do I have to use the amd64 distribution to use both cores?
> >>
> >
> > No, you need an SMP kernel to use both cores.  I thought the default
> > Ubuntu Kernels were SMP, but I could be wrong, and can't verify right now.
>
> I am almost certain the default is not SMP.  It's quite simple to check.
>  It doesn't require actually monitoring the CPUs.  Just do:
>
> uname -a
>
> I have:
>
> Linux e1505-laptop 2.6.15-28-686 #1 SMP PREEMPT Mon Mar 19 01:49:06 UTC
> 2007 i686 GNU/Linux

I have

Linux fisk 2.6.20-14-generic #2 SMP Mon Apr 2 20:37:49 UTC 2007 i686 GNU/Linux

Witch seems to be SMP!  Maybe it is not really.

> If yours doesn't show SMP, the kernel is not using both cores, and you
> should install linux-image-686 (or apparently linux-image-generic but
> I'm skeptical).

linux-image-686  seems to point to generic, this is all a bit strange,
any ideas?

Ime using AMD anyway.

Ben

> Matthew Flaschen
>
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