Multitasking case study on the Cray-2: The Q2R cellular automaton

Journal Article · Wed Jun 01 04:00:00 EDT 1988 · J. Comput. Phys.; (United States)

DOI:https://doi.org/10.1016/0021-9991(88)90150-7· OSTI ID:7055423

Zabolitzky, J G; Herrmann, H J

The Q2R cellular automation which may be used for microcanonical simulation of the Ising model is implemented in parallel on the four processors of a Cray-2 supercomputer. The simulation speed is 4.3 GHz as opposed to 670 MHz for the previously fastest reported implementation using one processor of a Cray--XMP. We also simulated the largest Ising system ever studied, 15, 130, 968, 192 spins. A number of subtleties in implementing and optimizing the parallel algorithm are discussed, as well as problems in defining performance measurements. Performance and results from the Q2R algorithm are compared to those from the standard Metropolis algorithm, and a number of dynamic exponents are measured for the first time. copyright 1988 Academic Press, Inc.

• Research Organization: Minnesota Supercomputer Institute and School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota
• OSTI ID: 7055423
• Journal Information: J. Comput. Phys.; (United States), Journal Name: J. Comput. Phys.; (United States) Vol. 76:2; ISSN JCTPA
• Country of Publication: United States
• Language: English

Related Subjects

99 GENERAL AND MISCELLANEOUS
990210* -- Supercomputers-- (1987-1989)
ALGORITHMS
ANGULAR MOMENTUM
COMPUTERIZED SIMULATION
COMPUTERS
CRAY COMPUTERS
CRYSTAL LATTICES
CRYSTAL MODELS
CRYSTAL STRUCTURE
CUBIC LATTICES
DIGITAL COMPUTERS
ISING MODEL
MAGNETIC MATERIALS
MATERIALS
MATHEMATICAL LOGIC
MATHEMATICAL MODELS
PARTICLE PROPERTIES
PERFORMANCE
SIMULATION
SOLIDS
SPIN
SUPERCOMPUTERS
THREE-DIMENSIONAL CALCULATIONS
TWO-DIMENSIONAL CALCULATIONS