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@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 <[email protected]>
Candela Technologies Inc http://www.candelatech.com
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