-Avinash
On 3/9/06, MANJUNATH <[EMAIL PROTECTED]> wrote:
Hi,
There is a paper by title "Issues Related to WSN Simulators", it
has answer to your questions....
Since TOSSIM is a bit-level simulator aiming to provide high
fidility using the full implementations of protocols (native
code), there exists a well known tradeoff "Scaliability Vs
accuracy and performance".
I think if you run simulations on higher end machines with
abundant RAM, It may scale to large number of nodes...I am not
sure whether TOSSIM supports PADS, if so multiprocessor enviroment
will help ypu out....
Manjunath
On Thu, 9 Mar 2006, Avinash Sridharan wrote:
> Hi Phil,
> Apologize for the empty mail before. The question I wanted to ask you with
> regards to running TOSSIM-2.x with arpproximately 500 nodes (more is even
> better). My simulation runs fine with around 100 nodes but anything beyond
> that the simulation segfaults.
>
> In order to stress TOSSIM-2.x and remove any ambiguities, I tried running
> the blink application for around 130 nodes and after booting up the
> simulation simply hanged.
>
> The application I am trying to simulate is a random walk. It works fine for
> 50 nodes. But apart from the nature of the application what was bothering me
> was the fact that nodes are not able to boot up itself.
> The loop I am using to boot up the motes is as below, I hope I am not
> making a mistake with the booting up process:
>
> for i in range(0, NUM_SIM_NODES):
> node = sim_obj.getNode(i);
> node.bootAtTime(sim_obj.time() + i*10000);
> while True:
> sim_obj.runNextEvent();
> if node.isOn() :
> print "Commpleted booting node "+str(i)
> break
> #create links between nodes
> sim_radio.setNoise(i, -105, 3.0);
> for j in range (0,NUM_SIM_NODES):
> if (j != i ):
> sim_radio.add(i, j, -50.0);
>
>
>
> Wanted to know your views on this.
>
> regards,
> Avinash
>
> ---------- Forwarded message ----------
> From: Avinash Sridharan <[EMAIL PROTECTED]>
> Date: Mar 9, 2006 7:21 PM
> Subject: your views of running TOSSIM with ~500 nodes
> To: Philip Levis <[EMAIL PROTECTED]>
> Cc: [email protected]
>
> Hi Phil,
>
>
> --
> Phd Dept. of Electrical Engineering
> University of Southern California
> http://www-scf.usc.edu/~asridhar <http://www-scf.usc.edu/%7Easridhar>
>
>
> --
> Phd Dept. of Electrical Engineering
> University of Southern California
> http://www-scf.usc.edu/~asridhar <http://www-scf.usc.edu/%7Easridhar>
>
> --
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Phd Dept. of Electrical Engineering
University of Southern California
http://www-scf.usc.edu/~asridhar
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