iperf3 -c 192.168.0.1
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-1.00 sec 16.6 MBytes 139 Mbits/sec
[ 4] 1.00-2.00 sec 23.4 MBytes 196 Mbits/sec
[ 4] 2.00-3.00 sec 14.8 MBytes 124 Mbits/sec
[ 4] 3.00-4.00 sec 15.2 MBytes 128 Mbits/sec
[ 4] 4.00-5.00 sec 15.4 MBytes 129 Mbits/sec
[ 4] 5.00-6.00 sec 14.6 MBytes 123 Mbits/sec
[ 4] 6.00-7.00 sec 20.9 MBytes 175 Mbits/sec
[ 4] 7.00-8.00 sec 14.2 MBytes 119 Mbits/sec
[ 4] 8.00-9.00 sec 14.1 MBytes 119 Mbits/sec
[ 4] 9.00-10.00 sec 15.4 MBytes 129 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-10.00 sec 165 MBytes 138 Mbits/sec sender
[ 4] 0.00-10.00 sec 164 MBytes 138 Mbits/sec receiver
iperf -c 192.168.0.110
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 929 MBytes 779 Mbits/sec
192.168.0.1 is Openwrt 18.06 and 112 is a MybookLive. Everything on the same network. Why is the router only perfing at 100mbit?
jeff
July 18, 2018, 8:57pm
2
Likely because it's a single-core, 680 MHz AR71xx that is trying to not only handle the interrupts as well as run iperf (which can be quite a CPU drain by itself).
Here's from an Archer C7 v2 (720 MHz) to a mid-range "desktop" system running Debian
jeff@office:~$ iperf3 -c nnn.nnn.nnn.nnn
Connecting to host nnn.nnn.nnn.nnn, port 5201
[ 5] local nnn.nnn.nnn.mmm port 55438 connected to nnn.nnn.nnn.nnn port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.07 sec 17.5 MBytes 138 Mbits/sec 0 72.1 KBytes
[ 5] 1.07-2.04 sec 16.2 MBytes 141 Mbits/sec 0 102 KBytes
[ 5] 2.04-3.02 sec 16.2 MBytes 139 Mbits/sec 0 115 KBytes
[ 5] 3.02-4.00 sec 20.7 MBytes 176 Mbits/sec 0 127 KBytes
[ 5] 4.00-5.00 sec 23.8 MBytes 200 Mbits/sec 0 127 KBytes
[ 5] 5.00-6.00 sec 24.1 MBytes 202 Mbits/sec 0 127 KBytes
[ 5] 6.00-7.00 sec 23.8 MBytes 200 Mbits/sec 0 127 KBytes
[ 5] 7.00-8.00 sec 24.2 MBytes 203 Mbits/sec 0 127 KBytes
[ 5] 8.00-9.00 sec 23.6 MBytes 198 Mbits/sec 0 127 KBytes
[ 5] 9.00-10.00 sec 24.1 MBytes 202 Mbits/sec 0 127 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 214 MBytes 180 Mbits/sec 0 sender
[ 5] 0.00-10.00 sec 214 MBytes 180 Mbits/sec receiver
Found an overclock patch to 800mhz
[ 4] 0.00-1.00 sec 46.6 MBytes 391 Mbits/sec
[ 4] 1.00-2.00 sec 47.5 MBytes 399 Mbits/sec
[ 4] 2.00-3.00 sec 46.8 MBytes 392 Mbits/sec
[ 4] 3.00-4.00 sec 47.2 MBytes 396 Mbits/sec
[ 4] 4.00-5.00 sec 47.2 MBytes 396 Mbits/sec
[ 4] 5.00-6.00 sec 44.8 MBytes 376 Mbits/sec
[ 4] 6.00-7.00 sec 47.2 MBytes 396 Mbits/sec
[ 4] 7.00-8.00 sec 45.8 MBytes 384 Mbits/sec
[ 4] 8.00-9.00 sec 47.5 MBytes 398 Mbits/sec
[ 4] 9.00-10.00 sec 45.8 MBytes 384 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-10.00 sec 466 MBytes 391 Mbits/sec sender
[ 4] 0.00-10.00 sec 466 MBytes 391 Mbits/sec receiver
woot.