Dual core CPUs support
kris at FreeBSD.org
Wed Dec 21 16:26:23 PST 2005
On Wed, Dec 21, 2005 at 11:04:53PM +0100, Gary Jennejohn wrote:
> Bruce Burden writes:
> > On Wed, Dec 21, 2005 at 09:12:22PM +0100, Tomas Randa wrote:
> > > Hello all friends of FreeBSD unix,
> > >
> > > I?d like to ask here, what is the actual situation with dual core CPUs -
> > > Athlon 64 X2 etc. and their functionality with FreeBSD 5.X / 6.X / 7.0
> > > current.
> > >
> > > I tried 5.4/i386 with options SMP, 6.0/i386 with the same config, in
> > > both cases system found only one CPU, but on 5.4 system wrote HTT 2
> > > logical units.
> > >
> > The i386 version disables HTT by default (see the security
> > notices for summer 2005 or thereabouts), so I am not surprised that
> > your second core is ignored/not reported. There is a switch that
> > will enable the HTT (second core, in your case) if you wish.
> > As another poster mentiond, the AMD64 version of FBSD will
> > recognise the second core as expected.
> HTT has nothing to do with recognizing an X2 AMD64. I've been running
> i386 since before 6R and FreeBSD has always seen both cores.
> Maybe the OP needs a new BIOS. I had to update my BIOS before the X2 was
> correctly recognized.
Yes, that is almost certainly the solution.
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