[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: PETSc lib performance tuning

Hi Razi,

I have tested both atlas and other blas/lapack and found small effects on linux.

For using ATLAS with petsc, you configure ATLAS, build it, and then specify when you configure petsc
--with-blas-lapack-dir=
where your ATLAS libs are. In my case, I use
--with-blas-lapack-dir=/usr/local/ATLAS/Linux_X86_64/

Good luck,
Berend.

I have a couple questions about the PETSc performance:

Does having ATLAS ( math-atlas.sourceforge.net ) help ? If so how do I
hook it to PETSc ?

How do I best customize the compiler flags? Should I edit the
variables directly in petscconf, or can I do it with configure ?


Thanks,

Razi