Comment 46 for bug 1670041

Likewise, on a non-congested network (802.11ac), directly from the laptop to the AP:

uname -r
4.13.0-rc1

➜ linux git:(5771a8c08880) ✗ cat /proc/sys/net/ipv4/tcp_congestion_control
bbr

➜ linux git:(5771a8c08880) ✗ iperf3 -u -b 1000M -c rtr
Connecting to host rtr, port 5201
[ 4] local 10.10.10.76 port 49939 connected to rtr port 5201
[ ID] Interval Transfer Bandwidth Total Datagrams
[ 4] 0.00-1.00 sec 24.6 MBytes 207 Mbits/sec 3153
[ 4] 1.00-2.00 sec 27.2 MBytes 228 Mbits/sec 3484
[ 4] 2.00-3.00 sec 26.9 MBytes 226 Mbits/sec 3441
[ 4] 3.00-4.00 sec 26.8 MBytes 225 Mbits/sec 3432
[ 4] 4.00-5.00 sec 27.0 MBytes 226 Mbits/sec 3453
[ 4] 5.00-6.00 sec 27.2 MBytes 228 Mbits/sec 3479
[ 4] 6.00-7.00 sec 26.7 MBytes 224 Mbits/sec 3421
[ 4] 7.00-8.00 sec 27.3 MBytes 229 Mbits/sec 3492
[ 4] 8.00-9.00 sec 27.2 MBytes 228 Mbits/sec 3484
[ 4] 9.00-10.00 sec 27.0 MBytes 227 Mbits/sec 3457
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams
[ 4] 0.00-10.00 sec 268 MBytes 225 Mbits/sec 0.035 ms 8231/34295 (24%)
[ 4] Sent 34295 datagrams

iperf Done.

➜ linux git:(5771a8c08880) ✗ iperf3 -c rtr
Connecting to host rtr, port 5201
[ 4] local 10.10.10.76 port 48172 connected to rtr port 5201
[ ID] Interval Transfer Bandwidth Retr Cwnd
[ 4] 0.00-1.00 sec 1.70 MBytes 14.2 Mbits/sec 0 11.3 KBytes
[ 4] 1.00-2.00 sec 1.59 MBytes 13.4 Mbits/sec 0 8.48 KBytes
[ 4] 2.00-3.00 sec 1.49 MBytes 12.5 Mbits/sec 0 11.3 KBytes
[ 4] 3.00-4.00 sec 1.54 MBytes 12.9 Mbits/sec 0 11.3 KBytes
[ 4] 4.00-5.00 sec 1.55 MBytes 13.0 Mbits/sec 0 8.48 KBytes
[ 4] 5.00-6.00 sec 1.50 MBytes 12.6 Mbits/sec 0 8.48 KBytes
[ 4] 6.00-7.00 sec 1.50 MBytes 12.6 Mbits/sec 0 8.48 KBytes
[ 4] 7.00-8.00 sec 1.47 MBytes 12.3 Mbits/sec 0 8.48 KBytes
[ 4] 8.00-9.00 sec 1.32 MBytes 11.1 Mbits/sec 0 8.48 KBytes
[ 4] 9.00-10.00 sec 1.43 MBytes 12.0 Mbits/sec 0 8.48 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-10.00 sec 15.1 MBytes 12.7 Mbits/sec 0 sender
[ 4] 0.00-10.00 sec 15.0 MBytes 12.6 Mbits/sec receiver

iperf Done.