[ns] start-up time and memory consumption in ns

[Iacopo Carreras]

Hi all,
I'm trying to simulate a large simulation (1000 nodes), but I run into some
performance problems of ns, meaning a huge memory consumption (1,5 Gb of RAM
needed!!!!) and a huge start-up time (more then 1 hour)...so I'm wondering
what I might be doing wrong, considering the I'm running the simulations on
a really good server woth more then 1 Gb of RAM!

Here is a brief description of the scenario:

- I've removed packet headers to save memory
- Since I don't need routing (I'm broadcasting only), I'm using the
DumbAgent routing agent
- I've implemented an application on top of an UDPAgent
- The application is broadcastin 1 packet every 3 seconds
- The simulation runs for 15000

What happen is that when I run the simulation it takes more the 30 minutes
to load with a huge memory peak and slowy start to run.

Do you have any hints? I'm I doing something wrong?

Thank you for your help!!

iacopo


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Iacopo Carreras
Research Staff Member
CREATE-NET
Via Solteri, 38 - 38100 TRENTO (TN) - Italy 
e-mail:   iacopo.carreras at create-net.it 
Tel:      +39 0461 422372
Fax:      +39 0461 421157
Web:      www.create-net.it
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