What you need for test setup :
- 1 or more wifi adapter.
- 1 Linux/Unix machine.
1. Start terminal and run "sudo apt-get install iperf" on both machine.
2. Login to machine A, run "iperf -s -p 50000"
option "-s" : server mode.
option "-p" : listen to port 50000
3. On machine B, run "iperf -c [machine B IP] -p 50000
option "-c" : client mode.
4. Results
# iperf -s -p 50000
------------------------------------------------------------
Server listening on TCP port 50000
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
[ 4] local 192.168.10.198 port 50000 connected with 192.168.10.134 port 42691
[ ID] Interval Transfer Bandwidth
[ 4] 0.0-10.1 sec 48.5 MBytes 40.1 Mbits/sec
[ 5] local 192.168.10.198 port 50000 connected with 192.168.10.134 port 42710
[ 5] 0.0-10.1 sec 48.4 MBytes 40.1 Mbits/sec
From the both performance is similar, suspect bottleneck is on machine A, I re-test with another machine with LAN, below is the result.
------------------------------------------------------------
Client connecting to 192.168.10.10, TCP port 50000
TCP window size: 22.9 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.10.100 port 37808 connected with 192.168.10.10 port 50000
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 74.5 MBytes 62.3 Mbits/sec
------------------------------------------------------------
Client connecting to 192.168.10.10, TCP port 50000
TCP window size: 22.9 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.10.134 port 37344 connected with 192.168.10.10 port 50000
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 43.6 MBytes 36.5 Mbits/sec
