On Wed, 2 Feb 2011, Vijay S. Mahadevan wrote: > On a similar note, is there something extra that needs to be done to > make use of multi-core machines while using MPI ? I am not sure if > this is even related to PETSc but could be an MPI configuration option > that maybe either I or the configure process is missing. All ideas are > much appreciated.
You can try '--download-mpich --download-mpich-device=ch3:nemesis' or '--download-openmpi' both with --with-debugging=0 - and see if they make any difference [you can have a different PETSC_ARCH for each build - and then compare] Satish
