Going from i386 AMD 64 Dual Core

[Matthew Flaschen]

Ben Edwards wrote:
> On 09/04/07, Matt Galvin <mgalvin at ubuntu.com> wrote:
>> On 4/9/07, Ben Edwards <funkytwig at gmail.com> wrote:
>>> Can I just apt-get a amd64 kernal or should I do other stuff?
>> Hi Ben
>>
>> No. In order to use your system as an amd64 system you would need to
>> perform a clean install using the amd64 installation CD. It's not only
>> the kernel that matters. Virtually every package is built for a
>> particular architecture (there are some exceptions). If you want a 64
>> bit OS you need to install it along with all the 64 bit versions of
>> all the applications and everything else as well.
> 
> If I stick to 32bit will both cores be used, are there performance
> benefits or just memory addressing etc of 64bit.

I believe you need to do:

sudo aptitude install linux-image-686

to have both cores/cpus be used.

Matt Flaschen