HYPER-SYSTOLIC PROCESSING ON APE100/QUADRICS: n2-LOOP COMPUTATIONS

Thomas Lippert, Gero Ritzenhöfer, Uwe Glaessner, Henning Hoeber, Armin Seyfried and Klaus Schilling
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Thomas Lippert: HLRZ c/o KFA-Jülich and DESY-Hamburg, D-52425 Jülich, Germany
Gero Ritzenhöfer: HLRZ c/o KFA-Jülich and DESY-Hamburg, D-52425 Jülich, Germany
Uwe Glaessner: Physics Department, University of Wuppertal, 42097 Wuppertal, Germany
Henning Hoeber: HLRZ c/o KFA-Jülich and DESY-Hamburg, D-52425 Jülich, Germany
Armin Seyfried: Physics Department, University of Wuppertal, 42097 Wuppertal, Germany
Klaus Schilling: HLRZ c/o KFA-Jülich and DESY-Hamburg, D-52425 Jülich, Germany;

International Journal of Modern Physics C (IJMPC), 1996, vol. 07, issue 04, 485-501

Abstract: We investigate the performance gains from hyper-systolic implementations ofn2-loop problems on the massively parallel computer Quadrics, exploiting its three-dimensional interprocessor connectivity. For illustration we study the communication aspects of an exact molecular dynamics simulation ofnparticles with Coulomb (or gravitational) interactions.We compare the interprocessor communication costs of the standard-systolic and the hyper-systolic approaches for various granularities. We predict gain factors as large as three on the Q4 and eight on the QH4 and measure actual performances on these machine configurations. We conclude that it appears feasible to investigate the thermodynamics of a full gravitatingn-body problem withO(16.000)particles using the new method on a QH4 system.

Keywords: Molecular Dynamics; Long Range Forces; Hyper-Systolic; Parallel Computer (search for similar items in EconPapers)
Date: 1996
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DOI: 10.1142/S0129183196000430

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