![]() ![]() OSU Micro Benchmarks | Summit is an IBM AC922 system that links more than 27,000 NVIDIA Volta GPUs with more than 9,000 IBM Power9 CPUs, interconnected with dual-rail Mellanox EDR 100Gb/s InfiniBand. The cluster is then tested for performance using native IB, native Ethernet, and RoCE via OpenMPI 1.10.3 built with Mellanox OFED3.3’s MXM libraries. ![]() When running as an Ethernet link layer, they communicate across a 100Gb Juniper QFX5200 Data Center switch. From a Mellanox to the Intel card I only obtain about 75 to 80 gigabit.| MSB7700-ES2F EDR Mellanox switch. Between two Mellanox cards I achieve the expected 93 gigabit. I have the problem that the Intel card does not provide the expected performance when benchmarking. All four are connected to an Alcatel 100 GbE switch. ![]() ![]() The other three have Mellanox ConnectX-5 100 GbE network cards. ![]()
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