[mvapich-discuss] Time differences between mpirun_rsh and mpiexec

[Jonathan Perkins]

On Tue, Jan 29, 2013 at 11:26:44PM +0000, scott.mackaro at vaisala.com wrote:
> Is there something special I need to do in order to get hydra to work
> with infiniband beyond the flags I provided in the configuration?

The launchers should be agnostic to which network interface is used by
MPI.

> Please let me know if I am missing something simple, or if I need to
> provide additional information.  I am admittedly not a system admin,
> but rather a scientist with more HPC experience than I would like.

How are you measuring the time of each run?  Are you using the same
hostfile and executable when comparing with both launchers?

-- 
Jonathan Perkins
http://www.cse.ohio-state.edu/~perkinjo