Performance Analysis of the MPAS-Ocean Code using HPCToolkit and MIAMI

MPAS-Ocean [4] is a component of the MPAS framework of climate models. MPAS-Ocean is an unstructured-mesh ocean model capable of using enhanced horizontal resolution in selected regions of the ocean domain. The code is publicly available for download [3] and comes with several input problems of different sizes corresponding to different simulation resolutions. In this initial study, we look at the per-core performance of version 2.0 of the MPAS-Ocean code. Our analysis was performed on a single node system with dual Intel Xeon E5-2690 CPUs, based on the Sandy Bridge micro-architecture. Each processor has 8 cores and a shared 20 MB L3 cache. We compiled the code with the Intel Fortran compiler 14.0.0 and optimization flags -O3 -g.