Re: [ns] Queue monitoring in a lan

[Neeraj - Khandelwal <neerajk@cs.tamu.edu>]

thanks.

yes, but what I want to measure is the queue delays for each packet, ie
the difference in time of enqueing and dequeing and not the queue size in
packets. I guess there should be a delay at the queues even if they are
blocked because of the way the ethernet works ie the contention protocols.
that is what i want to measure. Am i missing something here?

neeraj




On Sun, 17 Sep 2000, Alefiya Hussain wrote:

> In a LAN the queue is blocked till the mac layer sucessfully transmits the
> packet. 
> 
> Hence you will always get a queue length of one.
> 
> -alefiya
> 
> On Sun, 17 Sep 2000, Neeraj - Khandelwal wrote:
> 
> > 
> > Hi all 
> >    I am trying to meaasure the average queue delays over all the nodes in
> > an ethernet setup under ns. since the ethernet setup is not a typical link
> > to link setup but a shared medium one, how should I be measuring the queue
> > delays at evry node without making a queuemonitor object for each pair of
> > nodes. is there a cleaner way to do this?
> > 
> > 
> > I read the 13th chapter of the manual that says that the lan setup
> > basically uses the geneeral Queue object described in chapter 7. If I can
> > somehow attach the queuemonitor to each queue at each node (rather than
> > each pair of nodes) and use get-delay-samples or something similar then
> > I might be able to measure the queuing delays...
> > 
> > thanks for any help,
> > Neeraj
> > 
> > 
> 
>