Recently we have been working on performance optimizations for Platform MPI for the Swedish Meteorological and Hydrological Institute (SMHI).
The application we were testing the MPI optimization for is the “SMHI RCO application” which can use the ScaliMPI or the PMPI (Platform MPI).
At first we have tested the application performance on Scali MPI and Platform MPI and achieved the following results (using 144 ranks, 18 hosts 8 ranks each on the “Helios” cluster). The original Scali MPI based run was 474 seconds and the original Platform-MPI was 550 seconds.
We have modified the Platform MPI and the optimized results with Platform MPI demonstrated 450 seconds for the application run.
We want to thank the HPC Advisory Council for providing the resources for us to evaluate our optimizations and provide a better solution for the customer.