Re: atlas3-base vs atlas3-sse2

[Quentin Spencer]

Keith Goodman wrote:
> On 4/3/06, Quentin Spencer <address@hidden> wrote:
>   
> > Keith Goodman wrote:
> >     
> > > Matrix multiplication is much faster with atlas3-sse2 than with
> > > atlas3-base. That's on an Intel machine.
> > >
> > > Should I expect the same speedup when going from atlas3-base to
> > > atlas3-sse2 on an AMD machine?
> > >
> > >       
> > It depends on what AMD hardware you're talking about. There's
> > atlas3-3dnow for older AMD chips, but I think the newer ones support the
> > sse2 extensions, so I would expect the best performance with
> > atlas3-sse2. (Disclaimer: I only have experience with the Fedora
> > packages, which are very similar to the Debian packages).
> >     
>
> So it sounds like Fedora has a binary package of atlas3-sse2 for
> amd64. If so, then it must be possible to get it working with Debian.
>   

I didn't know you meant amd64. At 
http://packages.debian.org/unstable/libs/atlas3-base, it seems to 
indicate that there is a atlas-base package is compiled specifically for 
amd64.  The reason that there are some atlas-* packages is for 
extensions of a specific architecture; amd64 is regarded as its own 
architecture and therefore gets its own atlas3-base package. This is 
also true of Fedora, where the package is a atlas-<version>.x86_64.rpm


-Quentin



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