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IB6054601-00 D 3-1
Section 3
Using InfiniPath MPI
This chapter provides information on using InfiniPath MPI. Examples are provided
for compiling and running MPI programs.
3.1
InfiniPath MPI
QLogic’s implementation of the MPI standard is derived from the MPICH reference
implementation Version 1.2.6. The InfiniPath MPI libraries have been highly tuned
for the InfiniPath Interconnect, and will not run over other interconnects.
InfiniPath MPI is an implementation of the original MPI 1.2 standard. The MPI-2
standard provides several enhancements of the original standard. Of the MPI-2
features, InfiniPath MPI includes only the MPI-IO features implemented in ROMIO
version 1.2.6 and the generalized MPI_Alltoallw communication exchange.
In this Version 2.0release, the InfiniPath MPI implementation supports hybrid
MPI/OpenMP, and other multi-threaded programs, as long as only one thread uses
MPI. For more information, see section 3.10.
3.2
Other MPI Implementations
As of this release, other MPI implementations can now be run over InfiniPath. The
currently supported implementations are HP-MPI, OpenMPI and Scali. For more
information see section 3.6.
3.3
Getting Started with MPI
In this section you will learn how to compile and run some simple example programs
that are included in the InfiniPath software product. Compiling and running these
examples lets you verify that InfiniPath MPI and its components have been properly
installed on your cluster. See appendix C.8 if you have problems compiling or
running these examples.