Re: EMT64 SMP Test

[Alan Cox <alan redhat com>]

On Thu, Oct 28, 2004 at 07:18:36PM +1000, Russell Coker wrote:
> On Thu, 28 Oct 2004 14:16, Jerone Young <jerone gmail com> wrote:
> > Try the FC3 X86_64 realease candidate (just look at archive on list)
> > and see if everything works out. I wouldn't mind seeing how much
> > slower the EMT64 is compared to a true X86_64 CPU like the AMD Opteron
> 
> How is an EMT64 not a "true X86_64"?  They both run the same code.

Almost the same code. EM64T lacks prefetchw() and I believe also 3Dnow.
It also has no iommu which may be real consideration if using > 3Gb of
RAM.

Alan