[OpenWrt-Devel] trying to acheive close to 1 Gbps with 802.11ac 3x3 mimo ath10k Compex wle900vx

[David Johnson]

I'm trying to see what max speed can be achieved

My setup is as follow:
Board: Compex WPJ 563
Card Compex wle900vx
OS: Libremesh running openwrt 18.06
Driver: ath10k_pci 0000:00:00.0: firmware ver 10.2.4-1.0-00033 api 5
features no-p2p,raw-mode,mfp,allows-mesh-bcast crc32 c41417d0
Firmware: firmware-5.bin_10.2.4-1.0-00041

Physical setup
Connected 3 6dBi antennas on each side to CH0, CH1, CH2 port to
achieve 3x3 mimo. Distance between 2 devices is 2m on a bench. Set
power level on each end to 8 dBm to ensure I don't saturate radios

Status of radio Node A
iwinfo wlan0-mesh info
wlan0-mesh ESSID: "speedtest"
          Access Point: 04:F0:21:3E:DA:A2
          Mode: Client  Channel: 48 (5.240 GHz)
          Tx-Power: 8 dBm  Link Quality: 70/70
          Signal: -33 dBm  Noise: -102 dBm
          Bit Rate: 6.0 MBit/s
          Encryption: none
          Type: nl80211  HW Mode(s): 802.11bgnac
          Hardware: 168C:003C 0000:0000 [Qualcomm Atheros QCA9880]
          TX power offset: none
          Frequency offset: none
          Supports VAPs: yes  PHY name: phy0

Status of radio Node B
wlan0-mesh ESSID: "speedtest"
          Access Point: 04:F0:21:3E:DA:A2
          Mode: Master  Channel: 48 (5.240 GHz)
          Tx-Power: 8 dBm  Link Quality: 65/70
          Signal: -45 dBm  Noise: -105 dBm
          Bit Rate: 6.0 MBit/s
          Encryption: none
          Type: nl80211  HW Mode(s): 802.11bgnac
          Hardware: 168C:003C 0000:0000 [Qualcomm Atheros QCA9880]
          TX power offset: none
          Frequency offset: none
          Supports VAPs: yes  PHY name: phy0


Ping between radios

root at FlatsEast:~# ping 10.69.0.1
PING 10.69.0.1 (10.69.0.1) 56(84) bytes of data.
64 bytes from 10.69.0.1: icmp_req=1 ttl=64 time=1.29 ms
64 bytes from 10.69.0.1: icmp_req=2 ttl=64 time=1.22 ms
64 bytes from 10.69.0.1: icmp_req=3 ttl=64 time=1.22 ms

Used iperf to set throughput
Client side
iperf -c 10.69.0.1 -P 10 -i 5 -t 120

Server side
iperf -s

Best performance achieved after waiting for TCP to stabalize: 139 Mbps
[ 12] 45.0-50.0 sec  11.8 MBytes  19.7 Mbits/sec
[ 11] 45.0-50.0 sec  7.12 MBytes  12.0 Mbits/sec
[  9] 45.0-50.0 sec  8.12 MBytes  13.6 Mbits/sec
[  6] 45.0-50.0 sec  7.75 MBytes  13.0 Mbits/sec
[  8] 45.0-50.0 sec  8.00 MBytes  13.4 Mbits/sec
[  4] 45.0-50.0 sec  7.75 MBytes  13.0 Mbits/sec
[  3] 45.0-50.0 sec  7.75 MBytes  13.0 Mbits/sec
[ 10] 45.0-50.0 sec  6.62 MBytes  11.1 Mbits/sec
[  7] 45.0-50.0 sec  7.88 MBytes  13.2 Mbits/sec
[  5] 45.0-50.0 sec  9.88 MBytes  16.6 Mbits/sec
[SUM] 45.0-50.0 sec  82.6 MBytes   139 Mbits/sec

top:

Mem: 47064K used, 78232K free, 188K shrd, 3936K buff, 10564K cached
CPU:  19% usr  36% sys   0% nic   0% idle   0% io   0% irq  43% sirq
Load average: 4.59 3.06 1.90 3/74 25823
  PID  PPID USER     STAT   VSZ %VSZ %CPU COMMAND
    3     2 root     RW       0   0%  32% [ksoftirqd/0]
24511  4419 root     S    33320  27%  22% iperf -c 10.69.0.1 -P 10 -i 5 -t 120

Any suggestions

Regards
David

-- 
Dr David Johnson
Director, Ammbr Research Labs South Africa
Part of the AmmbrTech Group
http://www.ammbrtech.com

Adjunct Senior Lecturer
ICT4D, Computer Science Department
University of Cape Town
https://people.cs.uct.ac.za/~djohnson/

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