Re: MPI (was Re: BIG libraries with self-compiled version)

[Fredrik Lingvall]

Peter Soendergaard wrote:

> It is possible to compile ATLAS exactly for use on multi-cpu shared 
> memory machines. The code uses pthreads. I have not done it myself, 
> but it should say in the documentation how to do it.
If you do a 'make config' in ATLAS (3.7.8) you will be promted the 
following question:

ATLAS can provide SMP support for the Level 3 BLAS via Posix threads.
If you choose to build a threaded library, ATLAS will compile all
aspects of the library (including the serial components) with the
threaded compiler/link flags.  Most machines can use the serial
library even when it is compiled with threaded options, but this
is not guaranteed to work, so if you want a true serial library,
answer no to threading below.
  enable Posix threads support? [y]: 

So just asnwer 'y' and you will have thread support in ATLAS!

> > Then we should not this can't be used as a part of Octave, since the
> > license is not compatible with the GPL.
> >
> > I don't think we should encourage its use since it is not free sofware.
OK. GOTO's BLAS lib is however known to be the fastest on the supported 
platforms.

Fredrik



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