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Performance analysis of direct N-body algorithms for astrophysical simulations on distributed systems

Gualandris, A, Zwart, SP and Tirado-Ramos, A (2004) Performance analysis of direct N-body algorithms for astrophysical simulations on distributed systems ParallelComput., 33. pp. 159-173.

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Abstract

We discuss the performance of direct summation codes used in the simulation of astrophysical stellar systems on highly distributed architectures. These codes compute the gravitational interaction among stars in an exact way and have an O(N^2) scaling with the number of particles. They can be applied to a variety of astrophysical problems, like the evolution of star clusters, the dynamics of black holes, the formation of planetary systems, and cosmological simulations. The simulation of realistic star clusters with sufficiently high accuracy cannot be performed on a single workstation but may be possible on parallel computers or grids. We have implemented two parallel schemes for a direct N-body code and we study their performance on general purpose parallel computers and large computational grids. We present the results of timing analyzes conducted on the different architectures and compare them with the predictions from theoretical models. We conclude that the simulation of star clusters with up to a million particles will be possible on large distributed computers in the next decade. Simulating entire galaxies however will in addition require new hybrid methods to speedup the calculation.

Item Type: Article
Authors :
NameEmailORCID
Gualandris, Aa.gualandris@surrey.ac.ukUNSPECIFIED
Zwart, SPUNSPECIFIEDUNSPECIFIED
Tirado-Ramos, AUNSPECIFIEDUNSPECIFIED
Date : 9 December 2004
Identification Number : 10.1016/j.parco.2007.01.001
Uncontrolled Keywords : astro-ph, astro-ph
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 13:00
Last Modified : 17 May 2017 15:07
URI: http://epubs.surrey.ac.uk/id/eprint/837575

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