Massively parallel Poisson Equation Solver for hybrid Intel Xeon – Xeon Phi HPC Systems

We have optimized an implementation of a massively parallel algorithm for solving the Poisson equation using a 27-stencil discretization scheme based on the stabilized biconjugate gradient method. The code is written in the C programming language with OpenMP parallelization. The main objective of this whitepaper lies in the optimization of the code for native Intel Xeon Phi execution, where we observe nearly linear scalability on the MIC architecture for the bigger problem sizes.