Optimizing the advanced accelerator simulation framework synergia using OpenMP

Synergia is an advanced accelerator simulation framework widely used in the accelerator community. Unfortunately, its performance and scalability suffers significantly from very high communication requirements. In this paper, we address this issue by replacing the flat MPI programming model with the hybrid OpenMP+MPI programming model. We describe in detail how the code has been parallelized in OpenMP and what the challenges are. The improved hybrid code can perform over 1.7 times better than the original program for a realistic benchmark problem.