[ns] Ns-users Digest, Vol 63, Issue 4

[sahoo jagruti]

Dear J S,

To check memory leaks , you can go for valgrind tool. Check the link below.

http://valgrind.org/

Sometimes, out of of memory occurs if the trace file is large. In that case, just keep the traces that u need and turn off all other traces. For example, u may turn on AGT only and turn off MAC and RTR traces.

Thanks

Jagruti




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From: "ns-users-request at ISI.EDU" <ns-users-request at ISI.EDU>
To: ns-users at ISI.EDU
Sent: Thursday, March 5, 2009 9:00:29 AM
Subject: Ns-users Digest, Vol 63, Issue 4

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Today's Topics:

  1. Trace queue (Pop Barbie)
  2. Out of memory error (J S)


----------------------------------------------------------------------

Message: 1
Date: Tue, 3 Mar 2009 21:12:33 -0800 (PST)
From: Pop Barbie <cool.shivaji at yahoo.com>
Subject: [ns] Trace queue
To: "ns-users at isi.edu" <ns-users at ISI.EDU>
Message-ID: <370844.47825.qm at web45508.mail.sp1.yahoo.com>
Content-Type: text/plain; charset=iso-8859-1

Dear all

I'm using ns2.31 and i've given? the command to trace the? queue after starting the traffic.....

I want to trace the queue also the packet loss...

but i got an error when i execute the tcl script..

Please anyone help me to execute the code....

set gh [open que.tr w]

$ns trace-queue $n0 $m0 $gh



wrong # args: should be "_o3 self class proc n1 n2 ?file?"

??? (Simulator trace-queue line 1)

??? invoked from within

"$ns trace-queue $gh"

??? (file "jex.tcl" line 12)



THANKS 




      

------------------------------

Message: 2
Date: Wed, 4 Mar 2009 08:05:23 -0500
From: J S <geekreader at gmail.com>
Subject: [ns] Out of memory error
To: ns-users at ISI.EDU
Message-ID:
    <51c600f80903040505h678e00acx4e4dad85c01f33fb at mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

Hello-

I have a simulation set up in which I am using ping, packmime and
pareto(udp) traffcs among 150 odd nodes. Now when I tried to run my
simulation for longer time  (24 hours), the process was killed and the
kernel reported out of memory. The ns process could only last for 3 hours of
simulation time.
Does any one know how do I fix this problem?

I reviewed the page
http://isi.edu/nsnam/ns/ns-largesim.html
It suggest that I should remove all packet headers and add specific
headers, but since I have 3 different types of  packets (ping-ICMP,
packmime-tcp and pareto-UDP), how do I implement this?
Is there any way I can check for memory leak?

Thanks
JS


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