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Message Passing Toolkit (MPT) User's Guide
(document number: 007-3773-019 / published: 2011-11-15)
table of contents | additional info | download
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Message Passing
Toolkit (MPT) is a software package that supports interprocess data exchange
for applications that use concurrent, cooperating processes on a single
host or on multiple hosts. Data exchange is done through message passing,
which is the use of library calls to request data delivery from one process
to another or between groups of processes.
The MPT package contains the following components and the appropriate
accompanying documentation: Message Passing Interface (MPI). MPI is a standard specification
for a message passing interface, allowing portable message passing programs
in Fortran and C languages. MPI is the dominant programming model on large
scale HPC systems and clusters today. MPT supports version 2.2 of the
MPI standard specification.
The SHMEM™ programming model. SHMEM is a partitioned
global address space (PGAS) programming model that presents distributed
processes with symmetric arrays that are accessible via PUT and GET operations
from other processes. The SGI SHMEM programming model is the basis for
the OpenSHMEM™ programming model specification which
is being developed by the Open Source Software Solutions multi-vendor
working group.
SGI MPT is highly optimized for all SGI hardware platforms. The
SGI Performance Suite 1.x Start Here lists all current SGI
software and hardware manuals and can be found on the SGI Technical Publications
Library at: http://docs.sgi.com.
This chapter provides an overview of the MPI software that is included
in the toolkit. It includes descriptions of the MPI standard compliance,
the basic components of MPI, and the basic features of MPI. Subsequent
chapters address the following topics:
MPI was created
by the Message Passing Interface Forum (MPIF). MPIF is not sanctioned
or supported by any official standards organization. Its goal was to develop
a widely used standard for writing message passing programs.
SGI supports implementations of MPI that are released as part of
the Message Passing Toolkit. The MPI Standard is documented online at
the following address:http://www.mcs.anl.gov/mpi
MPI 2.2 Standard ComplianceThe SGI MPI implementation is compliant
with the MPI 2.2 standard.
The
MPI library is provided as a dynamic shared object (DSO) (a file with
a name that ends in .so). The basic components that
are necessary for using MPI are the libmpi.so library,
the include files, and the mpirun command.
Profiling support is included in the libmpi.so
library. Profiling support replaces all MPI_Xxx
prototypes and function names with
PMPI_Xxx entry points.
The
SGI MPI implementation offers a number of significant features that make
it the preferred implementation to use on SGI hardware: Data transfer optimizations for NUMAlink where available,
including single-copy data transfer
Multi-rail InfiniBand support to take full advantage of
the multiple InfiniBand fabrics available on SGI Altix ICE systems
Use of hardware fetch operations (fetchops),
where available, for fast synchronization and lower latency for short
messages
Optimized MPI-2 one-sided commands
Interoperability with the SHMEM (LIBSMA) programming model
High performance communication support for partitioned
systems via XPMEM
Message Passing Toolkit (MPT) User's Guide
(document number: 007-3773-019 / published: 2011-11-15)
table of contents | additional info | download
Front Matter
New Features in This Manual
About This Manual
Chapter 1. Introduction
Chapter 2. Administrating MPT
Chapter 3. Getting Started
Chapter 4. Programming with SGI MPI
Chapter 5. Debugging MPI Applications
Chapter 6. PerfBoost
Chapter 7. Checkpoint/Restart
Chapter 8. Run-time Tuning
Chapter 9. MPI Performance Profiling
Chapter 10. Troubleshooting and Frequently Asked Questions
Index
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