QCA9880 slow performance adhoc/IBSS mode

[Ben Greear]

Run iperf on a separate machine, as the apu2 have too weak of a CPU
to drive the wifi network at full speed.  And, publish what results you
do get, including RF information such as channel and how congested is your
test area.  Try udp as well as tcp.

Thanks,
Ben

On 02/28/2017 08:51 AM, Ralph Houthoofdt wrote:
> Dear all,
>
> I’m currently doing me masters thesis on the subject of Wireless Mesh
> Networks and how to optimize them for home use.
> The devices I use are 5x PC Engine APU2c4 with 2x QCA9880 chip (Compex
> WLE900VX). All of them are running LEDE (OpenWRT fork).
>
> The problem I’m experiencing is the same as
> http://lists.infradead.org/pipermail/ath10k/2017-January/009075.html . Using
> the tips mentioned I did not come to a better performance. I’m thinking it’s
> driver related..
> When running iperf3 only one direction is running at a reasonable
> throughput. Since I am using adhoc mode primarily I decided to use these
> packages:
> -	Kmod-ath10k-ct
> -	Ath10k-firmware-qca988x-ct
> Some sources on the internet said that using the Candela Tech drivers should
> result in better support for adhoc/mesh networks.
>
> As suggested in the other issue linked above, I switched TCP congestion
> control to ‘Reno’ instead of the default ‘Cubic’.
> I also did try the command “iw reg set BE” since I am from Belgium, but
> running “iw reg get” right after still gave me US as a result.
>
> Let me know what additional command info I should post. Any help would be
> greatly appreciated.
>
> Iwconfig:
> adhoc0    IEEE 802.11  ESSID:"mesh"
>           Mode:Ad-Hoc  Frequency:5.18 GHz  Cell: 02:CA:FE:CA:CA:40
>           Tx-Power=20 dBm
>           RTS thr:off   Fragment thr:off
>           Encryption key:off
>           Power Management:off
>
>
> Iw reg get (I’m from Belgium):
> global
> country BE: DFS-ETSI
>         (2402 - 2482 @ 40), (N/A, 20), (N/A)
>         (5170 - 5250 @ 80), (N/A, 20), (N/A), AUTO-BW
>         (5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS, AUTO-BW
>         (5490 - 5710 @ 160), (N/A, 27), (0 ms), DFS
>         (57000 - 66000 @ 2160), (N/A, 40), (N/A)
>
> phy#1
> country US: DFS-FCC
>         (2402 - 2472 @ 40), (N/A, 30), (N/A)
>         (5170 - 5250 @ 80), (N/A, 23), (N/A), AUTO-BW
>         (5250 - 5330 @ 80), (N/A, 23), (0 ms), DFS, AUTO-BW
>         (5490 - 5730 @ 160), (N/A, 23), (0 ms), DFS
>         (5735 - 5835 @ 80), (N/A, 30), (N/A)
>         (57240 - 63720 @ 2160), (N/A, 40), (N/A)
>
> phy#0
> country US: DFS-FCC
>         (2402 - 2472 @ 40), (N/A, 30), (N/A)
>         (5170 - 5250 @ 80), (N/A, 23), (N/A), AUTO-BW
>         (5250 - 5330 @ 80), (N/A, 23), (0 ms), DFS, AUTO-BW
>         (5490 - 5730 @ 160), (N/A, 23), (0 ms), DFS
>         (5735 - 5835 @ 80), (N/A, 30), (N/A)
>         (57240 - 63720 @ 2160), (N/A, 40), (N/A)
>
>
> Kind regards,
> Met vriendelijke groeten,
> Ralph Houthoofdt
> Student industriële wetenschappen informatica
>
>
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-- 
Ben Greear <greearb at candelatech.com>
Candela Technologies Inc  http://www.candelatech.com