On Tue, Nov 20, 2012 at 08:30:10AM +0100, Daniel Wagner wrote:
> Hi Seth,
>
> On 19.11.2012 20:11, Daniel Wagner wrote:
> > Works perfectly fine on my machine.
>
> Well, not really true. Though I am not sure if this what I am seeing
> related to your changes. I see following log only when I am using my
> home AP. The pattern is that when the connection stop working I see
> something like this in the log:
>
> [ 8735.159091] wlan0: moving STA 1c:c6:3c:1f:50:68 to state 4
> [ 8735.197298] wlan0: Rx A-MPDU request on tid 0 result 0
> [ 8735.566368] wlan0: Open BA session requested for 1c:c6:3c:1f:50:68 tid 0
> [ 8735.573701] wlan0: activated addBA response timer on tid 0
> [ 8735.578826] wlan0: switched off addBA timer for tid 0
> [ 8735.578834] wlan0: Aggregation is on for tid 0
> [ 8749.687530] wlan0: tx session timer expired on tid 0
> [ 8749.687558] wlan0: Tx BA session stop requested for 1c:c6:3c:1f:50:68 tid 0
> [ 8749.700550] wlan0: Stopping Tx BA session for 1c:c6:3c:1f:50:68 tid 0
>
>
> This is what I do: First establishing a connection, then after a while any
> traffic seems stops for a period and sometimes it recovers from that point. If
> not a disconnect/connect (using ConnMan) dance fixes the problem.
The tx session timer expiring is a result of not having any aggregate
transfers in a while. In my testing with iperf I see periods where the
transfer seems to stall, but it always recovers. These are less frequent
after my patches, but they still happen, and I haven't been able to work
out the cause yet. I'm not sure whether these are related to what you're
seeing or not.
Luckily I've added a bunch of new debug code. Could you make sure you
have MAC80211_MESSAGE_TRACING and BRCM_TRACING enabled in your config
and collect a trace when this is happening by running:
trace-cmd record -e mac80211 -e mac80211_msg -e brcmsmac \
-e brcmsmac_tx -e brcmsmac_msg
This going to collect a lot of data, and you should bump up the trace
buffer size to avoid overruns. Once you've got a trace please compress
trace.dat and put it along with your dmesg somewhere where I can get at
them.
Thanks,
Seth
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