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An efficient optimization of Hll method for the second generation of Intel Xeon Phi processor. (English) Zbl 1442.85001
Summary: In this paper, a new approach to vectorization of algorithms of computational fluid dynamics to simulate the dynamics of astrophysical objects is presented. A co-design of a computational model, from the formulation of equations to software tools, is described. The code performance is analyzed. A speed of 245 gigaflops on Intel Xeon Phi 7250 accelerator and 302 gigaflops on Intel Xeon Phi 7290 accelerator is reached. The code developed is used to solve a problem of interaction of different astrophysical objects such as galaxies, gas clouds, stars clusters.

MSC:
85-04 Software, source code, etc. for problems pertaining to astronomy and astrophysics
85-08 Computational methods for problems pertaining to astronomy and astrophysics
85-10 Mathematical modeling or simulation for problems pertaining to astronomy and astrophysics
85A05 Galactic and stellar dynamics
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