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6–Using Other MPIs

Managing Open MPI, MVAPICH, and QLogic MPI with the mpi-selector Utility

6-6 IB6054601-00 H

To compile your program in C, type:

$ mpicc mpi_app_name.c -o mpi_app_name

To check the default configuration for the installation, check the following file:

/usr/mpi/<$compiler>/<$mpi>/etc/mvapich.conf

Running MVAPICH Applications

By default, the MVAPICH shipped with the InfiniPath software stack runs over

PSM once it is installed.

Here is an example of a simple mpirun command running with four processes:

$ mpirun -np 4 -hostfile mpihosts mpi_app_name

Password-less ssh is used unless the -rsh option is added to the command line

above.

Further Information on MVAPICH

For more information about MVAPICH, see:

http://mvapich.cse.ohio-state.edu/

Managing Open MPI, MVAPICH, and QLogic MPI

with the mpi-selector Utility

When multiple MPI implementations have been installed on the cluster, you can

use the mpi-selector to switch between them. The MPIs that can be managed

with the mpi-selector are:

 Open MPI

 MVAPICH

 MVAPICH2

 QLogic MPI

The mpi-selector is an OFED utility that is installed as a part of QLogic

OFED 1.4. Its basic functions include:

 Listing available MPI implementations

 Setting a default MPI to use (per user or site wide)

 Unsetting a default MPI to use (per user or site wide)

 Querying the current default MPI in use

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Qlogic OFED+ Host Spécifications Page 100