[R] Xeon CPU and ATLAS

[Peter Dalgaard]

apjaworski at mmm.com writes:

> I am about to get a new machine at work - an IBM Intellistation with the
> Xeon 2.8 GB processor.  It will run Windows 2000.  I would like to install
> the proper ATLAS dll for this machine, but I am not sure if Xeon is P4?
> Does anybody have any experience with Xeon?

Yes, we have a dual 2.8 Xeon running Linux. Very nice machine. We've
had it for a bit more than a year and it's been of very good use. I
can see that I did two ATLAS builds in feb 2003, one is called
Linux_P4SSE2_2 and the other is Linux_Xeon_2. AFAIR (but it's been a
while), the former is the preconfigured thing that came out of a
quick-install and the other one is fully tuned version, and there was
no difference worth speaking of between the two. 

I think the difference between P4 and Xeon is the SSE1 vs SSE2 thing,
so you'd want the P4SSE2 DLL, but others may be able to speak more
authoritatively. 

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907