[petsc-users] Configuring petsc with MPI on ubuntu quad-core

[Satish Balay]

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