Hyper-Systolic Processing on APE100/Quadrics: N^2-Loop Computations
Abstract
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.
Cite
@article{arxiv.hep-lat/9512020,
title = {Hyper-Systolic Processing on APE100/Quadrics: N^2-Loop Computations},
author = {Th. Lippert and G. Ritzenhöfer and U. Glässner and H. Hoeber and A. Seyfried and K. Schilling},
journal= {arXiv preprint arXiv:hep-lat/9512020},
year = {2015}
}
Comments
Latex file + Postscript figures, 17 pages