Hi, Just for information, I did a quick test of Wireguard over a 40G Infiniband network, between two machines with a Xeon E5520.
Using iperf (TCP mode) over the wireguard interface, performance was around 1.6 Gbit/s. In bidirectional mode (iperf -d), performance was 700 Mbit/s + 800 Mbit/s. Note that infiniband has a MTU of 65520 bytes, but Wireguard still selects a MTU of 1420 bytes for its interface. After raising the MTU of the wireguard interface to 65450, performance went up to 7.6 Gbit/s (unidirectional iperf). Using the Infiniband network directly, iperf's performance is 21.7 Gbit/s (iperf maxes out the CPU at the receiver, even when using 8 threads). Hardware used: - Xeon E5520 @2.27GHz (2 CPUs, 4 cores each) - Mellanox ConnectX IB 4X QDR MT26428 Versions used: - Debian jessie - Linux 3.16.43-2 - Wireguard 0.0.20170421-2 - iperf 2.0.5 - Mellanox ConnectX InfiniBand driver v2.2-1 Baptiste
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