FLY: MPI-2 High Resolution code for LSS Cosmological Simulations

• Main Authors: Becciani, U, Antonuccio, V, Comparato, M
• Format: Journal Article
• Language: English
• Published: 20-03-2007
• Subjects: Physics - Astrophysics of Galaxies; Physics - Cosmology and Nongalactic Astrophysics; Physics - Earth and Planetary Astrophysics; Physics - High Energy Astrophysical Phenomena; Physics - Instrumentation and Methods for Astrophysics; Physics - Solar and Stellar Astrophysics
• DOI: 10.48550/arxiv.astro-ph/0703526

Comput.Phys.Commun.176:211-217,2007 Cosmological simulations of structures and galaxies formations have played a
fundamental role in the study of the origin, formation and evolution of the
Universe. These studies improved enormously with the use of supercomputers and
parallel systems and, recently, grid based systems and Linux clusters. Now we
present the new version of the tree N-body parallel code FLY that runs on a PC
Linux Cluster using the one side communication paradigm MPI-2 and we show the
performances obtained. FLY is included in the Computer Physics Communication
Program Library. This new version was developed using the Linux Cluster of
CINECA, an IBM Cluster with 1024 Intel Xeon Pentium IV 3.0 Ghz. The results
show that it is possible to run a 64 Million particle simulation in less than
15 minutes for each timestep, and the code scalability with the number of
processors is achieved. This lead us to propose FLY as a code to run very large
N-Body simulations with more than $10^{9}$ particles with the higher resolution
of a pure tree code. The FLY new version will be available at
http://www.ct.astro.it/fly/ and CPC Program Library.