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We present our new parallel GPU clusters in Beijing and Heidelberg and demonstrate the nearly optimal speedup and performance for parallel direct astrophysical N-body simulations with up to six million bodies. We reach about 1/3 of the peak performance for a real application code. The clusters are used to simulate dense star clusters with many binaries and galactic nuclei with supermassive black holes,...
In the last years, FPGAs became capable of performing complex floating-point based calculations. For many applications, highly parallel calculation units can be implemented which deliver a better performance than general-purpose processors. This paper focuses on applications where the calculations can be done in a pipeline, as it is often the case for simulations. A framework for rapid design of such...
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