I'm doing a test where we have a couple of tap devices, the two devices are seen by testpmd that is setup in forward mode.
On the linux side, the two tap devices are confined in different network namespaces and in one namespace we have an iperf server while on the other namespace the iperf client sending either UDP or TCP. I expected a bandwidth in the range of few gpbs while the actual measured bandwidth is a few gigabits. I suppose I need to configure the tap devices with optimized parameters but I don't know where to look for advice. If I try to use the loopback interface I can get something 40 gbps with a command like this: iperf -c 127.0.0.1 -u -i 1 -b 40g -t 10 -l 40000 .
