[LARTC] measuring queueing delay using iproute2

Linux Advanced Routing and Traffic Control

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On Tue, Feb 26, 2002 at 05:02:45PM -0800, Radhakrishnan Vijay wrote:
> I am using the tc functionality provided by iproute2
> to setup classes and queueing disciplines. I have a
> requirement to determine the queueing delay of each
> packet belonging to a particular class so that i can
> measure the average queueing delay over a time
> interval for a particular traffic class. I would be
> grateful if somebody could give me pointers on how i
> possibly can achieve this. I suspect that i would have
> to modify the source code of iproute2 , but am not too
> sure on what segment of the code i should be
> modifying.

Right now the actual delay is not measured by the kernel, so I don't see how
you would get at it. You could calculate the effective class bandwidth and
multiply that by the average qlength, but that would be pretty indirect.

Regards,

bert

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