Re: OfW + ATLAS

[Andy Adler]

address@hidden wrote:

> A lot of people asked for an atlas optimized version of ofw. One of the 
> first versions of ofw had the atlas package but although it worked fine 
> (and fast) on any Intel x86 I had a lot of problems on AMD and Cyrix 
> procs (hangs, unusual results, etc.) That's why I removed atlas.
>
> During the weekend I'll be making an atlas optimized version of ofw (as 
> a separate version). I'll try to detect the cpu from the installer (I think I 
> can) or I'll include a proper warning for the non-Intel users.
>
>  

One issue with this is that each octave.exe is about 7-8 Meg, including 
3 or 4 of them with
different ATLAS optimizations will make the install package big.

When I was doing the cygwin package on octave.sf.net, (with help from 
Philip Nienhuis)
I build ATLAS on a number of different machines (intel and AMD). I found
that the pentiumIII ATLAS was the fastest for all architectures, even 
compared
to locally build ATLAS. The other advantage was that the pentiumIII 
instruction
set is (I thought) very well supported.

It surprises me that you have had AMD and Cyrix problems - could you 
give some details.
I think that ATLAS is such a win, that it would be a shame to be forced 
to install
a BLAS version anywhere.

--
Andy Adler



-------------------------------------------------------------
Octave is freely available under the terms of the GNU GPL.

Octave's home on the web:  http://www.octave.org
How to fund new projects:  http://www.octave.org/funding.html
Subscription information:  http://www.octave.org/archive.html
-------------------------------------------------------------