Direct N-body simulation on supercomputers

descriptionPublicationkeyboard_double_arrow_right Part of book or chapter of book , Other literature type 10 Dec 2007 English Publisher:Springer Berlin Heidelberg

Authors: Junichiro Makino;

doi: 10.1007/bfb0116405

Direct N-body simulation on supercomputers

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Abstract

We have analyzed the effect of vectorization on several schemes of direct N-body integration. We find that an Aarseth-type code with a neighbour scheme, which is the fastest on a scalar processor, is still the fastest on vector processors for large N. For N=1000, the overall gain in speed is found to be a factor of 10 both in theory and experiment. In the presence of hard binaries, however, the gain is reduced significantly.

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University of Tokyo
Japan

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