Comment 37 for bug 1670041

Tested with http://kernel.ubuntu.com/~jsalisbury/lp1670041/ on a 2.4 GHz network.

iperf3: interrupt - the client has terminated
➜ ~ uname -r
4.10.0-26-generic

# UDP
➜ ~ iperf3 -u -b 1000M -c <redacted>
Connecting to host <redacted>, port 5201
[ 4] local 172.29.10.20 port 37973 connected to <redacted> port 5201
[ ID] Interval Transfer Bandwidth Total Datagrams
[ 4] 0.00-1.00 sec 9.69 MBytes 81.2 Mbits/sec 1240
[ 4] 1.00-2.00 sec 11.6 MBytes 97.2 Mbits/sec 1483
[ 4] 2.00-3.00 sec 11.9 MBytes 99.8 Mbits/sec 1523
[ 4] 3.00-4.00 sec 10.7 MBytes 89.4 Mbits/sec 1364
^C[ 4] 4.00-4.87 sec 10.3 MBytes 98.6 Mbits/sec 1316
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams
[ 4] 0.00-4.87 sec 54.1 MBytes 93.1 Mbits/sec 0.000 ms 0/6926 (0%)
[ 4] Sent 6926 datagrams
iperf3: interrupt - the client has terminated

# TCP
➜ ~ iperf3 -c <redacted>
Connecting to host <redacted>, port 5201
[ 4] local 172.29.10.20 port 52878 connected to <redacted> port 5201
[ ID] Interval Transfer Bandwidth Retr Cwnd
[ 4] 0.00-1.00 sec 745 KBytes 6.10 Mbits/sec 0 67.9 KBytes
[ 4] 1.00-2.00 sec 659 KBytes 5.40 Mbits/sec 0 97.6 KBytes
[ 4] 2.00-3.00 sec 680 KBytes 5.57 Mbits/sec 0 129 KBytes
[ 4] 3.00-4.00 sec 659 KBytes 5.40 Mbits/sec 0 158 KBytes
[ 4] 4.00-5.00 sec 662 KBytes 5.42 Mbits/sec 0 189 KBytes
[ 4] 5.00-6.00 sec 677 KBytes 5.55 Mbits/sec 0 219 KBytes
[ 4] 6.00-7.00 sec 663 KBytes 5.43 Mbits/sec 0 250 KBytes
^C[ 4] 7.00-7.71 sec 359 KBytes 4.15 Mbits/sec 0 272 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-7.71 sec 4.99 MBytes 5.42 Mbits/sec 0 sender
[ 4] 0.00-7.71 sec 0.00 Bytes 0.00 bits/sec receiver

Will try other patches as well: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/comments/33