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

[Ben Edwards]

On 09/04/07, Phil Pinkerton <pcpinkerton at gmail.com> wrote:
> I just installed from the Ubuntu 64 bit install CD onto an Acer 5102 AMD
> 64(x2) and did the update, upgrade, dist-upgrade series and I got:
>
> Linux quecaixa 2.6.20-14-generic #2 SMP Mon Apr 2 16:32:46 UTC 2007
> x86_64 GNU/Linux
>
> Where "quecaixa" is my system name
>
> TOP SHOWS (after pressing 1)
>
> top - 17:42:50 up  1:02,  1 user,  load average: 0.35, 0.23, 0.26
> Tasks: 125 total,   1 running, 124 sleeping,   0 stopped,   0 zombie
> Cpu0  :  2.1%us,  0.3%sy,  0.0%ni, 97.6%id,  0.0%wa,  0.0%hi,  0.0%si,
> 0.0%st
> Cpu1  :  1.0%us,  0.3%sy,  0.0%ni, 98.6%id,  0.0%wa,  0.0%hi,  0.0%si,
> 0.0%st
> Mem:   1930060k total,   942860k used,   987200k free,    45740k buffers
> Swap:  7478248k total,        0k used,  7478248k free,   566168k cached
>
> So I assume you should see something similar.

Seems to be OK now.  Maybe I did not reboot after changing to
linux-image-general

Ta,
Ben

> phil
>
>
> Ben Edwards wrote:
> > 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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> >>
> >>
> >
> >
> >
>
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Ben Edwards - Bristol, UK
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