Stellar Atmosphere Simulation code Bifrost on Intel Xeon Phi Knights Landing

In this white paper we report our experiences in porting the stellar atmosphere simulation code Bifrost to Intel Xeon Phi - Knights Landing Architecture (KNL). Bifrost is a parallel, Fortran 95/MPI code for solving the 3D radiation magnetohydrodynamic (RMHD) equations on a staggered grid using a high order compact finite difference scheme. The focus is on finding the most performant runtime setup and estimate possible performance gain when compared with Intel Haswell based nodes