Large number of Misc Discarded packets

[Dan Williams]

On Fri, 2008-07-04 at 14:43 +0200, Johan Adolfsson wrote:
> I get the following from 
> date; cat /proc/net/wireless /proc/net/dev
> when streaming data.
> Any ideas on the reason for this or ways to track it down?

That's coming from the firmware directly via the GET_LOG command as the
dot11ACKFailureCount member.  It's the # of frames that didn't get an
ACK within the expected timeframe.  Maybe congestion, lots of RF
activity, or range from the AP?

You could also argue that dot11ACKFailureCount shouldn't be mapped to
discarded.misc, but I have no strong feelings on that.

Dan

> 
> Fri Jul  4 13:37:35 GMT 2008
> Inter-| sta-|   Quality        |   Discarded packets               | Missed
> | WE
>  face | tus | link level noise |  nwid  crypt   frag  retry   misc | beacon
> | 22
>   eth1: 0002   83.  -60.  -93.       0   8283 399597 236597 59631647
> 0
> Inter-|   Receive                                                |  Transmit
>  face |bytes    packets errs drop fifo frame compressed multicast|bytes
> packets errs drop fifo colls carrier compressed
>     lo:358632450  170615    0    0    0     0          0         0 358632450
> 170615    0    0    0     0       0          0
>   eth0: 6484505   32757    0    0    0     0          0         0   884512
> 2921    6    0    0     0       6          0
>   sit0:       0       0    0    0    0     0          0         0        0
> 0    0    0    0     0       0          0
>   eth1: 8076459  121188    0    0    0    43          0         0 367757128
> 263472    0    0    0     0       0          0
> 
> 
> Fri Jul  4 13:40:15 GMT 2008
> Inter-| sta-|   Quality        |   Discarded packets               | Missed
> | WE
>  face | tus | link level noise |  nwid  crypt   frag  retry   misc | beacon
> | 22
>   eth1: 0002   80.  -64.  -94.       0   8283 434192 256856 64723855
> 0
> Inter-|   Receive                                                |  Transmit
>  face |bytes    packets errs drop fifo frame compressed multicast|bytes
> packets errs drop fifo colls carrier compressed
>     lo:388772746  185313    0    0    0     0          0         0 388772746
> 185313    0    0    0     0       0          0
>   eth0: 7026643   35485    0    0    0     0          0         0   934133
> 3099    6    0    0     0       6          0
>   sit0:       0       0    0    0    0     0          0         0        0
> 0    0    0    0     0       0          0
>   eth1: 8735986  131096    0    0    0    45          0         0 398630908
> 285487    0    0    0     0       0          0
> 
> time      13:40:15 - 13:37:35 = 2415 - 2255 = 160
> txpackets:  285487 -    263472 =    22015
> txbytes: 398630908 - 367757128 = 30873780  ==> 192961 bytes/s = 1.5Mbit/s
> misc      64723855  - 59631647 =  5092208
> 
> 
> 
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