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Title:
Numerical cosmology using special purpose computers: implementing P(3M) on GRAPE
Authors:
Brieu, Philippe P.
Affiliation:
AA(Princeton University Observatory)
Publication:
American Astronomical Society, 184th AAS Meeting, #41.08; Bulletin of the American Astronomical Society, Vol. 26, p.927
Publication Date:
05/1994
Origin:
AAS
Bibliographic Code:
1994AAS...184.4108B

Abstract

An adaptation of the ``Particle-Particle/Particle-Mesh'' (P(3M) ) code to the special purpose hardware ``GRAPE'' is presented. GRAPE (for ``GRAvity piPE'') is the generic name for a series of computer chip boards designed by the University of Tokyo to handle ``N-body'' computations at the speed of supercomputers. It is coupled to a workstation used for other calculations. Specifically, the ``PP'' part is done by a four chip GRAPE-3A, while the ``PM'' part is done on a Sun Sparc 10/51 workstation. The substantial modifications of the original code needed for this implementation are described in detail. The resulting combination achieves about one third of the speed of a Cray C-90 for the fully vectorized P(3M) . Applications to cosmological simulations are discussed.
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