Re: b43 : under high load, ack are lost

[matthieu castet <castet.matthieu@free.fr>]

Matthieu CASTET <castet.matthieu@...> writes:

> 
> Hi,
> 
> I use a 4306 (core rev 5) with compat-wireless-2009-05-08 as wireless driver
> and
> 4.150.10.5 firmware.
> My station is an airo card in wpa-psk mode (802.11b).
> 
> After resolving my beacon problem [1], when I download at max speed my 
> station
> disconnect from AP because "LostSync-MaxRetry".
> After looking in my station statistic it seems the retry (RetryLong) are due 
> to
> noack received from the AP.
I take a monitor trace of the trafic and I see weird stuff from the b43 AP, 
there is lot of case of :
- client send data to AP
- AP send data to client
- ack from client
- AP send data to client
- ack from client
- AP send data to client
- ack from client
- ack from AP (for 1 packet)


Sometimes it is :
- client send data to AP
- AP send data to client
- ack from client
- AP send data to client
- ack from client
- AP send data to client
- ack from client
- client resend data to AP
- ack from AP
- client send data to AP
- ack from AP
- ack from AP (for 1 packet)


It seems like ack are queued somewhere with low priority.