Toward Developing a Unimem OFI Provider for MPI Support

OpenFabrics Interfaces (OFI) is a unified abstraction of fabric network hardware for high-performance computing (HPC). Recently, HPC runtimes such as MPICH have been written on top of OFI’s libfabric API. In this work we present our ongoing efforts toward developing an OFI provider for the Unimem architecture to offer efficient MPI capabilities on this emerging technology. The MPICH CH4-based runtime running the current version of our OFI provider attains 14.47 μs latency for small messages and 360.59 MB/s peak bandwidth for large messages on a prototype Unimem board.