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--- Begin Message ---On Sunday, September 3, 2017 11:35:46 AM CEST Rosen Penev wrote: > On a TL-WN710N, this patch increases iperf performance from ~92.5 to ~93.5 > mbps. Keep in mind the WN710N is a 100mbps device. I expect greater numbers > from gigabit devices. > > Signed-off-by: Rosen Penev <ros...@gmail.com> > --- I've done a quick test of the patch on my WD Range Extender. (It has a Atheros AR9344 rev 2 SoC @ CPU:560.000MHz, DDR:400.000MHz The PHY is a AR8035, which supports 1 GBit/s Links) The range extender (DUT) was running iperf3 server in both tests. Another desktop PC was acting as the iperf3 client. without the patch: Connecting to host range-extender, port 5201 [ 4] local 192.168.8.7 port 51518 connected to 192.168.8.204 port 5201 [ ID] Interval Transfer Bandwidth Retr Cwnd [ 4] 0.00-1.00 sec 23.5 MBytes 197 Mbits/sec 0 105 KBytes [ 4] 1.00-2.00 sec 23.7 MBytes 199 Mbits/sec 0 105 KBytes [ 4] 2.00-3.00 sec 23.6 MBytes 198 Mbits/sec 0 105 KBytes [ 4] 3.00-4.00 sec 23.0 MBytes 193 Mbits/sec 0 105 KBytes [ 4] 4.00-5.00 sec 23.4 MBytes 197 Mbits/sec 0 105 KBytes [ 4] 5.00-6.00 sec 23.3 MBytes 195 Mbits/sec 0 105 KBytes [ 4] 6.00-7.00 sec 23.4 MBytes 196 Mbits/sec 0 105 KBytes [ 4] 7.00-8.00 sec 23.6 MBytes 198 Mbits/sec 0 105 KBytes [ 4] 8.00-9.00 sec 23.1 MBytes 194 Mbits/sec 0 105 KBytes [ 4] 9.00-10.00 sec 22.1 MBytes 185 Mbits/sec 0 105 KBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth Retr [ 4] 0.00-10.00 sec 233 MBytes 195 Mbits/sec 0 sender [ 4] 0.00-10.00 sec 232 MBytes 195 Mbits/sec receiver iperf Done. with the patch (gro enabled - this is done by default): Connecting to host range-extender, port 5201 [ 4] local 192.168.8.7 port 52004 connected to 192.168.8.204 port 5201 [ ID] Interval Transfer Bandwidth Retr Cwnd [ 4] 0.00-1.00 sec 32.7 MBytes 274 Mbits/sec 0 106 KBytes [ 4] 1.00-2.00 sec 32.6 MBytes 274 Mbits/sec 0 106 KBytes [ 4] 2.00-3.00 sec 32.4 MBytes 272 Mbits/sec 0 106 KBytes [ 4] 3.00-4.00 sec 32.3 MBytes 271 Mbits/sec 0 106 KBytes [ 4] 4.00-5.00 sec 32.5 MBytes 273 Mbits/sec 0 106 KBytes [ 4] 5.00-6.00 sec 32.5 MBytes 273 Mbits/sec 0 106 KBytes [ 4] 6.00-7.00 sec 32.6 MBytes 273 Mbits/sec 0 106 KBytes [ 4] 7.00-8.00 sec 32.4 MBytes 272 Mbits/sec 0 106 KBytes [ 4] 8.00-9.00 sec 32.6 MBytes 273 Mbits/sec 0 106 KBytes [ 4] 9.00-10.00 sec 31.4 MBytes 264 Mbits/sec 0 106 KBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth Retr [ 4] 0.00-10.00 sec 324 MBytes 272 Mbits/sec 0 sender [ 4] 0.00-10.00 sec 324 MBytes 272 Mbits/sec receiver iperf Done. (range-extender) # ethtool -K eth0 gro off Connecting to host range-extender, port 5201 [ 4] local 192.168.8.7 port 52120 connected to 192.168.8.204 port 5201 [ ID] Interval Transfer Bandwidth Retr Cwnd [ 4] 0.00-1.00 sec 24.8 MBytes 208 Mbits/sec 0 105 KBytes [ 4] 1.00-2.00 sec 23.6 MBytes 198 Mbits/sec 0 105 KBytes [ 4] 2.00-3.00 sec 24.5 MBytes 206 Mbits/sec 0 105 KBytes [ 4] 3.00-4.00 sec 23.9 MBytes 201 Mbits/sec 0 105 KBytes [ 4] 4.00-5.00 sec 24.6 MBytes 207 Mbits/sec 0 105 KBytes [ 4] 5.00-6.00 sec 24.7 MBytes 207 Mbits/sec 0 105 KBytes [ 4] 6.00-7.00 sec 24.5 MBytes 206 Mbits/sec 0 105 KBytes [ 4] 7.00-8.00 sec 24.0 MBytes 201 Mbits/sec 0 105 KBytes [ 4] 8.00-9.00 sec 24.3 MBytes 204 Mbits/sec 0 105 KBytes [ 4] 9.00-10.00 sec 24.5 MBytes 206 Mbits/sec 0 105 KBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth Retr [ 4] 0.00-10.00 sec 244 MBytes 204 Mbits/sec 0 sender [ 4] 0.00-10.00 sec 243 MBytes 204 Mbits/sec receiver iperf Done. So, the throughput went from 195 Mbits/sec to 272 Mbits/sec. The gain would be (272 Mbps - 195 Mbps) / 195 Mbps = 0.3949 ~ 40% Regards, Christian
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