[Click] How to log Queue size and drops

[Brecht Vermeulen]

Hi,

not sure what you're asking, but you can see the highwater_length
in /proc/click/*elementname*/

apollo148:/proc/click/Queue23# ls
capacity  config  handlers          length  ports  reset_counts
class     drops   highwater_length  name    reset
apollo148:/proc/click/Queue23# cat highwater_length
0

you can also see the number of dropped packets.
And you can reset the statistics by using:
echo 1 > reset

I think the dropped packets you see in the Queue, are only dropped 
because of a full queue (highwater_length=full length).

Packets dropped in other places are not easily traceble (PollDevice has 
some statistics, but FromDevice not I think)

Can you test the performance also with UDP traffic as Eddie suggested 
(e.g. with iPerf also) ?

regards,
Brecht

Simon Schuetz wrote:

> Hi,
> I'm using the configuration
> FromDevice(eth0) -> Queue(xxxx) -> DelayUnqueue(0.05) -> ToHost(eth0)
> 
> I want to adjust the Queue size, but how can I find out about the
> highest usage of the Queue? How can I log the high_watermark?
> 
> I there any possibility to get some information whether the queue
> dropped some packets for any reason (overfull,....)
> 
> Thanks
> Simon
> 
> 
> 
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