Absoft tools provide a complete solution for SMP & MPI code development. Absoft Pro Fortran 32-bit and 64-bit compilers, Fx3 graphical debugger and IDE include OpenMP and MPI support. Auto-parallelization and auto-vectorization ensure maximum performance on multi-core Linux, Windows and Mac OS, for SMP and MPI environments. Over twenty-nine years of product evolution and world-wide testing ensure maximum reliability and robust operation. Technical resources listed below.

 

Tech Summary:

Parallel Code

Utilizing multiple cores or processors to simultaneously process code can result in significant application speed-ups. Shared memory (SMP) and distributed memory (DMP) are the two most common types of parallel environments.

OpenMP

OpenMP is an Application Program Interface (API) that supports multi-platform shared-memory parallel (i.e., a multi-core workstation) programming in C/C++ and Fortran on all architectures, including Linux, Windows and Mac OS X platforms. Jointly defined by a group of major computer hardware and software vendors, OpenMP is a portable, scalable model that gives shared-memory parallel programmers a simple and flexible interface for developing parallel applications for platforms ranging from the desktop to the supercomputer.

MPI

MPI is an Application Program Interface (API) designed to allow multiple computers to communicate with each other to solve parallel applications (typically written in C/C++ and Fortran).

Originally developed at Argonne labs for distributed memory systems (clusters) MPI is used primarily on computer clusters and supercomputers. Evolution of this model now encompasses different versions with MPICH2 and Open MPI the leading implementations.

For MPI customers using Windows, Microsoft has developed Windows HPC 2008.

Absoft includes the following numerical libraries:

BLACS – The BLACS (Basic Linear Algebra Communication Subprograms) is a set of efficient distributed memory algorithms designed to be implemented efficiently and uniformly across a large range of distributed memory platforms. Using BLACS simplifies program development and portability.

ScaLAPACK – A library of high-performance linear algebra routines for distributed–memory message-passing MIMD computer and networks of workstations supporting MPI

Links to Useful Information

Absoft Pro Fortran & IMSL Documentation Library

OpenMP.org

LLNL OpenMP Tutorials

LLNL Parallel Computing Tutorials

 

IMSL Numerical Fortran Libraries

Include Algorithms for SMP and MPI Parallel Programming.

SMP/OpenMP Support
The IMSL Fortran Numerical Library offers expanded SMP support for a number of parallel processing environments. Computationally intensive algorithms in the areas of linear systems and matrix manipulation, eigensystem analysis, and fast Fourier transforms (FFTs) leverage SMP capabilities on a variety of systems.

MPI Enabled
IMSL Fortran Numerical Library provides a dynamic interface for computing mathematical solutions over a distributed system via Message Passing Interface (MPI). MPI enabled routines offer a simple, reliable user interface.

The IMSL Fortran library provides a number of MPI-enabled routines with an MPI-enhanced interface that provides:

  • Computational control of the server node
  • Scalability of computational resources
  • Automatic processor prioritization
  • Self-scheduling algorithm to keep processors continuously active
  • Box data type application
  • Computational integrity
  • Dynamic error processing
  • Homogeneous and heterogeneous network functionality
  • Use of descriptive names and generic interfaces
  • A suite of testing and benchmark software
 
MPI Configurations Supported By Absoft:


Linux x86-64:
Use Standard Absoft Floating Licenses
for Linux, no special cluster license needed!

  • MPICH
  • MPICH2
  • Open MPI
  • Rocks (x64 only)

Windows:
Use Standard Absoft Floating Licenses
for Windows, no special cluster license needed!

  • Microsoft Compute Cluster Software (CCS 2003)
  • MPICH


MacOS/PPC:

Use Standard Absoft Floating Licenses
for MacOS/PPC, no special cluster license needed!

  • MPICH2
  • Open MPI



MacOS/Intel:

Use Standard Absoft Floating Licenses
for MacOS/Intel, no special cluster license needed!

  • MPICH2
  • Open MPI

Notes on Various MPI Distributions:

MPICH* - Developed by Argonne Labs and especially popular in research environments. Currently supported on Linux and MacOS.

Open MPI - Developed by vendors, labs and academics. Supported by a wide variety of commercial and research groups. Currently supported on Linux and MacOS.

CCS 2003 & 2008 - Developed by Microsoft based on MPICH2, specifically for Windows based clusters.

Rocks+Roll - Clustercorp provides software, services and support based on proven solutions using the Rocks cluster distribution for x64 Linux.

MPI build instructions for use with Absoft compilers:

MPICH2- Linux x86 or x64, MacOS/Intel, MacOS/PPC
Open MPI- Linux x86 or x64, MacOS/Intel, MacOS/PPC
CCS 2003 & 2008 - Contact Microsoft for details


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