Hyper-Systolic Processing on APE100/Quadrics: N^2-Loop Computations

We investigate the performance gains from hyper-systolic implementations of n^2-loop problems on the massively parallel computer Quadrics, exploiting its 3-dimensional interprocessor connectivity. For illustration we study the communication aspects of an exact molecular dynamics simulation of n part...

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Published in:arXiv.org 1995-12
Main Authors: Lippert, Th, Ritzenhöfer, G, Glässner, U, Hoeber, H, Seyfried, A, Schilling, K
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Language:English
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Computer simulation
Interprocessor communication
Molecular dynamics
Parallel computers
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creator Lippert, Th
Ritzenhöfer, G
Glässner, U
Hoeber, H
Seyfried, A
Schilling, K
description We investigate the performance gains from hyper-systolic implementations of n^2-loop problems on the massively parallel computer Quadrics, exploiting its 3-dimensional interprocessor connectivity. For illustration we study the communication aspects of an exact molecular dynamics simulation of n particles 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 3 on the Q4 and 8 on the QH4 and measure actual performances on these machine configurations. We conclude that it appears feasable to investigate the thermodynamics of a full gravitating n-body problem with O(10000) particles using the new method on a QH4 system.
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subjects Computer simulation
Interprocessor communication
Molecular dynamics
Parallel computers
title Hyper-Systolic Processing on APE100/Quadrics: N^2-Loop Computations
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