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Portable parallel programming in a Fortran environment

✍ Scribed by Edward N. May

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
637 KB
Volume
57
Category
Article
ISSN
0010-4655

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✦ Synopsis

Experience using the Argonne-developed PARMACs macro package to implement a portable parallel programming environment is described. Fortran programs with intrinsic parallelism of coarse and medium granularity are easily converted to parallel programs which are portable among a number of commercially available parallel processors in the class of shared-memory bus-based and local-memory network based MIMD processors. The parallelism is implemented using standard UNIX tools and a small number of easily understood synchronization concepts (monitors and message-passing techniques) to construct and coordinate multiple cooperating processes on one or many processors. Benchmark results are presented for parallel computers such as the Alliant FX/8, the Encore MultiMax, the Sequent Balance, the Intel iPSC/2 Hypercube and a network of Sun 3 workstations. These parallel machines are typical MIMD types with 8-30 processors, such rated at 1-10 Mips processing power. The demonstration code used for this work is a Monte Carlo simulation of the response to photons of a "nearly realistic" lead, iron and plastic electromagnetic and hadronic calorimeter, using the EGS4 code system.

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