A Work- and Data-Sharing Parallel Tree N-body Code

Details A Work- and Data-Sharing Parallel Tree N-body Code A Work- and Data-Sharing Parallel Tree N-body Code

1996-08-28

arxiv.org/abs/astro-ph/9608188v1

Astronomy and Astrophysics

Astrophysics

16 pages, 8 figures. Uses elsart.sty and epsf.sty. Accepted for publication in Computer Physics Communications

Scientific paper

10.1016/S0010-4655(96)00121-X

We describe a new parallel N-body code for cosmological simulations. The code is based on a work- and data sharing scheme, and is implemented within the Cray Research Corporation's CRAFT programming environment. Different data distribution schemes have been adopted for bodies' and tree's structures. Tests performed for two different types of initial distributions show that the performance scales almost ideally as a function of the size of the system and of the number of processors. We discuss the factors affecting the absolute speedup and how it can be increased with a better tree's data distribution scheme.

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