Today we’re excited to announce the latest release of the Elastic Fabric Adapter (EFA) installer with support for Open MPI 5.0.

EFA provides a low latency, high bandwidth networking interface for workloads requiring a high level of inter-node communication. Open MPI 5.0 is the latest version of the popular open source Message Passing Interface (MPI) implementation that includes improved compatibility with the MPI Standard 4.0 and new features such as MPI Sessions, Hierarchical AutotuNed (HAN) collectives, and GPUDirect RDMA support.

MPI Sessions allows multiple libraries within an MPI process to call MPI APIs and eliminates the bottleneck of world communicator initialization. HAN collectives are now the default MPI collectives to improve overall latency and bandwidth. Finally, Open MPI 5.0 now supports GPUDirect RDMA for Point-to-Point communications. GPUDirect RDMA allows developers to bypass the CPU and transfer memory directly between NVIDIA GPUs and other PCI-E devices, such as EFA. High Performance Computing (HPC) developers can now leverage Amazon EC2 instances powered by NVIDIA A100 and H100 GPUs to build highly scalable HPC clusters in the cloud with EFA and Open MPI 5.0.ENnbsp;

Open MPI 5.0 is now available as part of EFA installer v1.30.0. Simply run the installer and enable the Open MPI 5.0 module to get started. Developers looking to use GPUDirect RDMA can do so on Amazon EC2 P4 and P5 instances.

Learn more about running Open MPI 5.0 with EFA and download the latest EFA installer.