overlimits value in statistics

Linux Advanced Routing and Traffic Control

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Good Day, Stef!

Sunday, September 8, 2002, 1:57:43 PM, you wrote:

>> I was interested with a question what exactly
>> is considered in overlimits parameter to count
>> of statistics. I thought, that this parameter
>> should specify number of the packages which
>> have exceeded valid boundary. But, for example
>> statistics on one of queues:

SC> I have some more info on www.docum.org (FAQ page) :

SC> overlimits : Packet is not sended due to ceil or rate restrictions 
SC> So there was to much data in the class. But don't believe this too much. It 
SC> depends on how often the qdisc looked for packet. This counter is incremented 
SC> per unsucessfull DRR loop and it's possible that this happens more then once 
SC> per packet. 
SC> Each dropped packet is overlimited. 

Thus this parameter is really useless?

I have paid attention, that at speed of passinge of packages approximately 40 pps
growth rate of this parameter about (near) 150000 pps.

--
Igor

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