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

[Matthew Flaschen]

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

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).

Matthew Flaschen