The regression still exists in Kernel 4.7.0-040700rc4-generic.
I tested 3 times:
x@x-E6400:~$ iperf -c 192.168.10.11 -r -t 30
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
------------------------------------------------------------
Client connecting to 192.168.10.11, TCP port 5001
TCP window size: 136 KByte (default)
------------------------------------------------------------
[ 5] local 192.168.10.21 port 57022 connected with 192.168.10.11 port 5001
[ ID] Interval Transfer Bandwidth
[ 5] 0.0-30.0 sec 506 MBytes 141 Mbits/sec
[ 4] local 192.168.10.21 port 5001 connected with 192.168.10.11 port 35856
[ 4] 0.0-30.3 sec 192 MBytes 53.2 Mbits/sec
x@x-E6400:~$ iperf -c 192.168.10.11 -r -t 30
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
------------------------------------------------------------
Client connecting to 192.168.10.11, TCP port 5001
TCP window size: 170 KByte (default)
------------------------------------------------------------
[ 5] local 192.168.10.21 port 57026 connected with 192.168.10.11 port 5001
[ ID] Interval Transfer Bandwidth
[ 5] 0.0-30.1 sec 500 MBytes 140 Mbits/sec
[ 4] local 192.168.10.21 port 5001 connected with 192.168.10.11 port 35864
[ 4] 0.0-30.5 sec 201 MBytes 55.2 Mbits/sec
x@x-E6400:~$ iperf -c 192.168.10.11 -r -t 30
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
------------------------------------------------------------
Client connecting to 192.168.10.11, TCP port 5001
TCP window size: 136 KByte (default)
------------------------------------------------------------
[ 5] local 192.168.10.21 port 57028 connected with 192.168.10.11 port 5001
[ ID] Interval Transfer Bandwidth
[ 5] 0.0-30.0 sec 495 MBytes 138 Mbits/sec
[ 4] local 192.168.10.21 port 5001 connected with 192.168.10.11 port 35871
[ 4] 0.0-30.4 sec 237 MBytes 65.5 Mbits/sec
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
** Tags added: kernel-bug-exists-upstream
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https://bugs.launchpad.net/bugs/1594148
Title:
Intel wireless 6300 ultimate, regression of throughput 12.04 >> 16.04
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