QCD simulations with staggered fermions on GPUs

Details QCD simulations with staggered fermions on GPUs QCD simulations with staggered fermions on GPUs

2011-06-28

arxiv.org/abs/1106.5673v3

Computer Physics Communications 183 (2012) 853-863

Physics

High Energy Physics

High Energy Physics - Lattice

22 pages, 14 eps figures, final version to be published in Computer Physics Communications

Scientific paper

10.1016/j.cpc.2011.12.011

We report on our implementation of the RHMC algorithm for the simulation of lattice QCD with two staggered flavors on Graphics Processing Units, using the NVIDIA CUDA programming language. The main feature of our code is that the GPU is not used just as an accelerator, but instead the whole Molecular Dynamics trajectory is performed on it. After pointing out the main bottlenecks and how to circumvent them, we discuss the obtained performances. We present some preliminary results regarding OpenCL and multiGPU extensions of our code and discuss future perspectives.

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