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RDMA Performance in Virtual Machines using QDR InfiniBand on VMware vSphere 5

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RDMA Performance in Virtual Machines using QDR InfiniBand on VMware vSphere 5

While high bandwidth, low latency communication has long been important for High Performance Computing, it is now becoming increasingly important in modern, scale-out Enterprise and Cloud environments. This research report from the VMware Office of the CTO reports performance results using Mellanox QDR InfiniBand in Red Hat guests with VM DirectPath I/O (passthrough mode). We demonstrate that bandwidths delivered over a wide range of message sizes closely match those achievable in non-virtualized environments and, in addition, show that latencies under two microseconds can be achieved.

Authors

Josh Simons, Adit Ranadive, Bhavesh Davda

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