QCD simulations with staggered fermions on GPUs

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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.