PETSc lib performance tuning

Berend van Wachem berend at
Fri Feb 24 07:28:20 CST 2006

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
where your ATLAS libs are. In my case, I use

Good luck,

> I have a couple questions about the PETSc performance:
> Does having ATLAS ( ) 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

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