RE: [ns] problems using ns

[Jorge Manrique <jorge.manrique@upcnet.es>]

Hi Arijit,

I'm not an expert on NS but it looks like there is no congestion at all in that queue, so that every time that a packet arrives at the queue it finds the queue empty and leaves the queue inmediantely. By increasing the traffic, decreasing your link bandwidth or using a more bursty traffic generator yo should be able to see some queueing delay.

Hope this helps,

Jorge

-----Mensaje original-----
De:	Arijit Ganguly [SMTP:arijitg@tct.hut.fi]
Enviado el:	viernes, 25 de mayo de 2001 15:17
Para:	ns-users@ISI.EDU
Asunto:	[ns] problems using ns

hello ns users
while tracing the enque and deque operations on a queue, using the
trace-queue utility, i observed the following

In a number of cases the time for Enque and Deque operations was the
same for a packet.
for example
+ 0.014 ******
- 0.014 ******

This means the ns doesn't model the queueing delay. I tried to increase
the precision, but still the times were the same.

I want to get the current queue size during the enque and deque, as a
funtion of time.
Now problem i am facing is what value do i take for queue size at, say
0.014 sec. (refering to above output).

your replies would be highly appreciated.
thank you
arijit ganguly