Forums - WIFI Throughput Test

Hi there,

I'm evaluating the RB5 kit and wanted to test the WIFI performance, I connected my RB5 to a 5GHz hotspot running on an Nvidia Jetson TX2, which runs in 802.11ac mode. I tested the throughput using iperf3 and got the following results;

sh-4.4# iperf3 -c 192.168.12.1 --bandwidth 0 -f M -u

Connecting to host 192.168.12.1, port 5201

[  4] local 192.168.12.139 port 37580 connected to 192.168.12.1 port 5201

[ ID] Interval           Transfer     Bandwidth       Total Datagrams

[  4]   0.00-1.00   sec  40.5 MBytes  40.5 MBytes/sec  5190  

[  4]   1.00-2.00   sec  42.4 MBytes  42.5 MBytes/sec  5430  

[  4]   2.00-3.00   sec  42.4 MBytes  42.4 MBytes/sec  5430  

[  4]   3.00-4.00   sec  42.6 MBytes  42.5 MBytes/sec  5450  

[  4]   4.00-5.00   sec  41.8 MBytes  41.8 MBytes/sec  5350  

[  4]   5.00-6.00   sec  42.3 MBytes  42.3 MBytes/sec  5420  

[  4]   6.00-7.00   sec  41.6 MBytes  41.7 MBytes/sec  5330  

[  4]   7.00-8.00   sec  41.6 MBytes  41.6 MBytes/sec  5330  

[  4]   8.00-9.00   sec  42.1 MBytes  42.1 MBytes/sec  5390  

[  4]   9.00-10.00  sec  42.3 MBytes  42.3 MBytes/sec  5410  

- - - - - - - - - - - - - - - - - - - - - - - - -

[ ID] Interval           Transfer     Bandwidth       Jitter    Lost/Total Datagrams

[  4]   0.00-10.00  sec   420 MBytes  42.0 MBytes/sec  0.227 ms  1/53730 (0.0019%)  

[  4] Sent 53730 datagrams

sh-4.4# iw wlan0 station dump

Station 00:03:7f:12:0b:dd (on wlan0)

rx bytes: 1128482861

rx packets: 798662

tx bytes: 1559925658

tx packets: 575511

tx retries: 178458

tx failed: 6

signal:  -49 dBm

signal avg: -46 [-46, -64] dBm

tx bitrate: 866.7 MBit/s VHT-MCS 9 80MHz short GI VHT-NSS 2

rx bitrate: 866.7 MBit/s VHT-MCS 9 80MHz short GI VHT-NSS 2

I would have expected better performance than ~40MBytes/sec. Can anyone comment on if this is the expected data rate or do I need to make any config modifications in order to see improvements?

Note that I have antenna's connected to Antenna0 and Antenna1 connectors.