On 02/08/2017 19:31, Mason wrote: > # iperf3 -c 172.27.64.45 -u -b 950M > Connecting to host 172.27.64.45, port 5201 > [ 4] local 172.27.64.1 port 55533 connected to 172.27.64.45 port 5201 > [ ID] Interval Transfer Bandwidth Total Datagrams > [ 4] 0.00-1.00 sec 102 MBytes 858 Mbits/sec 13091 > [ 4] 1.00-2.00 sec 114 MBytes 953 Mbits/sec 14541
114 MB in 14541 packets => 7840 bytes per packet Is iperf3 sending jumbo frames?? In the nb8800 driver, RX_BUF_SIZE is only 1552, how would it deal with jumbo frames... truncate? > # iperf3 -c 172.27.64.45 -u -b 950M -l 800 > Connecting to host 172.27.64.45, port 5201 > [ 4] local 172.27.64.1 port 35197 connected to 172.27.64.45 port 5201 > [ ID] Interval Transfer Bandwidth Total Datagrams > [ 4] 0.00-1.00 sec 90.6 MBytes 760 Mbits/sec 118724 > [ 4] 1.00-2.00 sec 107 MBytes 894 Mbits/sec 139718 107 MB in 139718 packets => 766 bytes per packet 800 - 8 (UDP) - 20 (IPv4) = 772 bytes per packet I suppose that's close enough... 772 * 139718 = 107.86 MB I need to run the test slightly slower, to prevent packet loss at the sender. Perhaps -b 0 or -b 800M Regards.
