When testing iperf3 performance between two DK boards, if both the MTU is modified and echo "1" > /sys/devices/platform/bus@0/a808d10000.ethernet/net/mgbe2_0/threaded is applied, the iperf3 connection will drop only when setting threaded to 1, while modifying only the MTU value does not disconnect iperf3.
Modified with reference to the forum at the following link: https://forums.developer.nvidia.com/t/nv-devkit-mgbe2-0-iperf3-9-4gbits-sec/361764/6