ath9k_htc over 20 Nodes

[Lukas Göstl]

Hi again,

I got my Mesh Network running without any of the wireless adapters getting stuck. The Problem was that the adapter got overwhelmed when the ath9k driver wanted to send more packets than the adapter could process. More precisely the adapter got Problems when the HTC_MAX_TX_STATUS (defined as 12) was reached. So I reduced the software queue of the ath9k driver from 256 to 12 Packets. 

However the performance could be better. Has anyone an idea for another solution or a suggestion to increase the performance?

Thanks,
Lukas

> Hi all,
> 
> i successfully build up a secure Mesh Network over 20 Nodes with 
> wpa_supplicant, ath9k_htc and linux-kernel 3.18
> 
> I know there is a limit of station peering's on ath9k_htc, however I whitelisted the stations in a way, that only 7 Peers authenticate with each other.
>
> The Mesh Network runs well for about 2 - 3 hours. Then some wireless adapters get stuck and do not response anymore. They need a Powercycle to work again.
> 
> Has anybody an idea why this happens or what`s the best way to debug such a problem? I don't get any output in syslog.
> 
> Thanks,
> Lukas