tested full series on Bananapi-r64 (mt7531) running iperf3-server [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.00 sec 1.09 GBytes 939 Mbits/sec 0 sender [ 5] 0.00-10.01 sec 1.09 GBytes 935 Mbits/sec receiver reverse mode (-R) [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.01 sec 1.10 GBytes 941 Mbits/sec 0 sender [ 5] 0.00-10.00 sec 1.09 GBytes 939 Mbits/sec receiver similar to bananapi-r2 (mt7530) [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.00 sec 1.09 GBytes 938 Mbits/sec 0 sender [ 5] 0.00-10.01 sec 1.09 GBytes 936 Mbits/sec receiver reverse-mode: [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.01 sec 1.05 GBytes 905 Mbits/sec 14533 sender <<<<<<<<<<< [ 5] 0.00-10.00 sec 1.05 GBytes 905 Mbits/sec receiver on last test i see iperf3 has ~30%cpu load and also ksoftirqd (using debian buster), so i tried opening server on my Laptop and running iperf -c on BPI-R2 with similar result [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.00 sec 1.03 GBytes 886 Mbits/sec 13990 sender [ 5] 0.00-10.00 sec 1.03 GBytes 885 Mbits/sec receiver in dmesg of both devices only DSA-Messages (nonfatal error -95 setting MTU on port) because of missing port_change_mtu callback. here i got a patch, but had not yet time to setup environment for testing jumbo-frames too. But this just as side-note regards Frank
