mpi-prog porting from lam -> scyld beowulf mpi difficulties

Sean Dilda agrajag at
Thu Nov 29 15:46:10 PST 2001

On Wed, 28 Nov 2001, Peter Beerli wrote:

> (1) if I run "top" why do I see 6 processes running when I start
>     with mpirun -np 3 migrate-n ? 

Two per node.  For every process your want running, it also runs another
one to take care of the MPI network I/O.   Our MPI is based off of
mpich, and this is how they have it setup.
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