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

[Ben Greear]

If you are running iperf on a weak-ish AP CPU, then that will be a bottleneck.
Run iperf on external system through the AP instead.  For TCP, use multiple streams,
and first test with Ethernet mode to make sure iperf and/or CPU is not the bottleneck
before you move to testing the WiFi interfaces.

We can get around 900Mbps UDP download throughput on a 'perfect' setup with 3x3 9880 WLE900VX
systems and the ath10k-ct firmware.

Forcing MCS rate is not a good idea...tune antennas and/or RF environment so that you do not have
to force MCS to get highest encoding rate.

Thanks,
Ben

On 10/05/2018 04:17 AM, David Johnson wrote:
> 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
>

-- 
Ben Greear <greearb at candelatech.com>
Candela Technologies Inc  http://www.candelatech.com

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