You can try netperf. It works fine. Snippet below shows the results of the network thruput between 2 Opteron boxes running 3.9 with bge/em gigabit cards.
[EMAIL PROTECTED]:/home/ssehic$ netperf -H x2100 -l 300 -- -s 64K -m 64K -M 64K -S 64K TCP STREAM TEST to 192.168.0.61 Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 65536 65536 65536 300.01 936.58
