Computing on Knights and Kepler Architectures

G. Bortolotti, M. Caberletti, G. Crimi, A. Ferraro, F. Giacomini, M. Manzali, G. Maron, M. Pivanti, D. Salomoni, S. F. Schifano, R. Tripiccione, M. Zanella
CNAF – INFN, Italy
Journal of Physics: Conference Series, Volume 513, Track 5, 052032, 2014


   title={Computing on Knights and Kepler Architectures},

   author={Bortolotti, G and Caberletti, M and Crimi, G and Ferraro, A and Giacomini, F and Manzali, M and Maron, G and Pivanti, M and Salomoni, D and Schifano, SF and others},

   booktitle={Journal of Physics: Conference Series},





   organization={IOP Publishing}


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A recent trend in scientific computing is the increasingly important role of co-processors, originally built to accelerate graphics rendering, and now used for general high-performance computing. The INFN Computing On Knights and Kepler Architectures (COKA) project focuses on assessing the suitability of co-processor boards for scientific computing in a wide range of physics applications, and on studying the best programming methodologies for these systems. Here we present in a comparative way our results in porting a Lattice Boltzmann code on two state-of-the-art accelerators: the NVIDIA K20X, and the Intel Xeon-Phi. We describe our implementations, analyze results and compare with a baseline architecture adopting Intel Sandy Bridge CPUs.
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