ADRV9361-Z7035 throughput

[zhangsd20]

Performance (best case: aggregation/AMPDU on):

iperf: TCP 40~50Mbps; UDP 50Mbps
EVM -38dB; MCS0 sensitivity -87dBm; MCS7 -72dBm. (FMCOMMS2 2.4GHz; cable and OTA test)

The best result described is iperf tcp at 40~50Mbps, my actual test whether with the instrument test or I use the terminal to connect ap can not reach this bandwidth.

my test:

AP-->client [ 3] local 192.168.13.1 port 56380 connected with 192.168.13.7 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0- 1.0 sec 3.00 MBytes 25.2 Mbits/sec [ 3] 1.0- 2.0 sec 3.00 MBytes 25.2 Mbits/sec [ 3] 2.0- 3.0 sec 3.12 MBytes 26.2 Mbits/sec [ 3] 3.0- 4.0 sec 3.25 MBytes 27.3 Mbits/sec [ 3] 4.0- 5.0 sec 3.12 MBytes 26.2 Mbits/sec [ 3] 5.0- 6.0 sec 3.25 MBytes 27.3 Mbits/sec

client-->AP [ 3] local 192.168.13.7 port 56380 connected with 192.168.13.1 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0- 1.0 sec 1.50 MBytes 12.6 Mbits/sec [ 3] 1.0- 2.0 sec 1.38 MBytes 11.5 Mbits/sec

I used an Analog device ADRV9361-Z7035 for the image. The branch of openwifi is master.

What might be the cause of this? what should i do ?

[JiaoXianjun]

You can consider to enable AMPDU as we mentioned in the quick start guide:

Use "./wgd.sh 1" to enable experimental AMPDU aggregation on top of 11n

[zhangsd20]

I've tested enable AMPDU ,enabling AMPDU throughput looks lower. ./wgd.sh 1 ./fosdem.sh test: [ 3] local 192.168.13.1 port 44054 connected with 192.168.13.7 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0- 1.0 sec 128 KBytes 1.05 Mbits/sec [ 3] 1.0- 2.0 sec 128 KBytes 1.05 Mbits/sec

[JiaoXianjun]

For TCP, it is not stable (suspect compatibility issue with some clients). You could try UDP. And you could also adjust the antenna, distance, etc.. You can also play with these tricks: https://github.com/open-sdr/openwifi/blob/master/doc/app_notes/frequent_trick.md

7035 has very low Tx power in 5GHz (ADI's design flaw), so I suggest you disconnect the Rx antenna (to avoid saturation caused by too close client), keep the Tx antenna, put the client (for example, the cell phone) very very close to the board (antenna/port).

[zhangsd20]

UDP: [ 3] local 192.168.13.1 port 45442 connected with 192.168.13.4 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0- 1.0 sec 5.63 MBytes 47.3 Mbits/sec [ 3] 1.0- 2.0 sec 5.86 MBytes 49.2 Mbits/sec [ 3] 2.0- 3.0 sec 5.91 MBytes 49.6 Mbits/sec [ 3] 3.0- 4.0 sec 5.56 MBytes 46.7 Mbits/sec [ 3] 4.0- 5.0 sec 5.50 MBytes 46.1 Mbits/sec [ 3] 5.0- 6.0 sec 5.51 MBytes 46.2 Mbits/sec [ 3] 6.0- 7.0 sec 5.75 MBytes 48.2 Mbits/sec [ 3] 7.0- 8.0 sec 5.90 MBytes 49.5 Mbits/sec [ 3] 8.0- 9.0 sec 5.97 MBytes 50.0 Mbits/sec

If I want to improve tcp throughput,How to configure ?

[zhangsd20]

Hi,

iperf: TCP 40~50Mbps; UDP 50Mbps. The highest throughput I tested TCP was only 27Mbbps, and I never reached the 40Mbps described above.

If I want to improve tcp throughput,How to configure ?

[JiaoXianjun]

I just tried our latest img with iperf3 between openwifi board and iPad (TCP). It is not that stable, but it does achieve 40~50Mbps with a big chance. Video: https://youtube.com/shorts/0TAqlmuysyo

So my suggestions:

1. Use our latest openwifi img.
2. Use Tx antenna only, and unplug the Rx antenna to give it a "CLEAN" environment from the receiver point of view.
3. Put the client VERY (as close as possible) close to the openwifi board, because openwifi Tx power is much lower than normal WiFi router.
4. IMPORTANT: Find the unused CLEAN WiFi channel at your location/environment (or the least busy channel). 5GHz channel is preferred.
5. Command on openwifi board: "wgd.sh 1" and "fosdem.sh"
6. Command on openwifi board: "iperf3 -s -i1"
7. App on iPad: iPerf 3 Wifi Speed Test (Server address 192.168.13.1, port 5201, Download, 5 Streams, Test duration 10s)

But due to the fact that different boards have different frequency offsets (on board crystal difference), it is normal that if you see the different performance. Our algorithm has limited performance while handling big frequency offset. We are still working on it.

Good luck!

commits: openwifi https://github.com/open-sdr/openwifi/commit/a0972944154fce74e9db0908970c2bb2f8a31978 openwifi-hw https://github.com/open-sdr/openwifi-hw/commit/691e9d86b788747ed3de74cb2c8793f94b5fff62 openofdm https://github.com/open-sdr/openofdm/commit/747101dca8d00b4d0a99bd07dba647cd49948d04

[zhangsd20]

I'm sorry for taking so long to get back to you.

Vivado 2021.1 was reinstalled as required and a new img was used.

No matter how I configure or adjust the device location, the TCP throughput can never exceed 30Mbps.

test: root@analog:~/openwifi# iperf3 -c 192.168.13.4 -i 1 -t 60 -P 5 Connecting to host 192.168.13.4, port 5201 [ 5] local 192.168.13.1 port 42206 connected to 192.168.13.4 port 5201 [ 7] local 192.168.13.1 port 42208 connected to 192.168.13.4 port 5201 [ 9] local 192.168.13.1 port 42210 connected to 192.168.13.4 port 5201 [ 11] local 192.168.13.1 port 42212 connected to 192.168.13.4 port 5201 [ 13] local 192.168.13.1 port 42214 connected to 192.168.13.4 port 5201 [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0.00-1.00 sec 1.05 MBytes 8.84 Mbits/sec 0 83.4 KBytes
[ 7] 0.00-1.00 sec 895 KBytes 7.33 Mbits/sec 0 72.1 KBytes
[ 9] 0.00-1.00 sec 485 KBytes 3.97 Mbits/sec 3 26.9 KBytes
[ 11] 0.00-1.00 sec 648 KBytes 5.30 Mbits/sec 1 43.8 KBytes
[ 13] 0.00-1.00 sec 844 KBytes 6.91 Mbits/sec 1 45.2 KBytes
[SUM] 0.00-1.00 sec 3.86 MBytes 32.4 Mbits/sec 5

---

[ 5] 1.00-2.00 sec 764 KBytes 6.25 Mbits/sec 2 53.7 KBytes
[ 7] 1.00-2.00 sec 636 KBytes 5.21 Mbits/sec 2 43.8 KBytes
[ 9] 1.00-2.00 sec 399 KBytes 3.26 Mbits/sec 0 29.7 KBytes
[ 11] 1.00-2.00 sec 452 KBytes 3.70 Mbits/sec 2 26.9 KBytes
[ 13] 1.00-2.00 sec 636 KBytes 5.21 Mbits/sec 0 59.4 KBytes
[SUM] 1.00-2.00 sec 2.82 MBytes 23.6 Mbits/sec 6

[JiaoXianjun]

Normally this kind of SoM has worse performance than the independent RF card like fmcomms2/3/4. I don't know why. Maybe due to the on board crystal.