Re: [RFC PATCH v2 0/2] nb8800 suspend/resume support

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.