Optimization strategy for a performance portable Vlasov code

This paper presents optimization strategies applied on a kinetic plasma simulation code that makes use of Ope-nACC/OpenMP directives and Kokkos performance portable framework to run across multiple CPUs and GPUs. We evaluate the impacts of optimizations on multiple hardware platforms: Intel Xeon Skylake, Fujitsu Arm A64FX, and Nvidia Tesla P100 and V100. With vectorization and cache tuning, the Op...