CUDAEASY - a GPU Accelerated Cosmological Lattice Program

Details CUDAEASY - a GPU Accelerated Cosmological Lattice Program CUDAEASY - a GPU Accelerated Cosmological Lattice Program

2009-11-30

arxiv.org/abs/0911.5692v1

Comp. Phys. Comm. 181,5, 906-912,2010

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

10 pages, 10 figures

Scientific paper

10.1016/j.cpc.2010.01.002

This paper presents, to the author's knowledge, the first graphics processing unit (GPU) accelerated program that solves the evolution of interacting scalar fields in an expanding universe. We present the implementation in NVIDIA's Compute Unified Device Architecture (CUDA) and compare the performance to other similar programs in chaotic inflation models. We report speedups between one and two orders of magnitude depending on the used hardware and software while achieving small errors in single precision. Simulations that used to last roughly one day to compute can now be done in hours and this difference is expected to increase in the future. The program has been written in the spirit of LATTICEEASY and users of the aforementioned program should find it relatively easy to start using CUDAEASY in lattice simulations. The program is available at http://www.physics.utu.fi/theory/particlecosmology/cudaeasy/ under the GNU General Public License.

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