RE: How to do kernel packet forwarding performance analysys - please comment on my method

Robert Olsson (Robert.Olsson@data.slu.se)
Fri, 27 Jun 2003 15:20:46 +0200


adamski writes:

> i would like to start two flows through linux router: PHB EF and BE PHB..
> like voip and ftp or so...
>
> than i want to analyse what exactly happens ... since my theoretical
> analysys show delays (or latencies - from packet entering the NIC to going
> out of the outgoing interface) of hundereds of usec (~200us) while
> experiments shows 5-10ms !!!!! with CBQ (configured like CBWFQ and LLQ)

Seems you have to add your own hooks for this and I guess you've seen
CONFIG_NET_PROFILE which does accurate measurements for network related
operations. It was long time since I used though...

Cheers.
--ro
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