Re: [ns] ns2 post-analysis of the trace files

[Old Maven]

Hi Samer,

I agree that Tracegraph could not provide us with the output we desire. But
anyways, how can i base that my scripts were correct. As for that matter,
could you share how you perform your post-analysis for new wireless format.

Your help will be much appreciated.

Thanks

On 2/24/07, Samer Bali [EMAIL PROTECTED] wrote:


 hi all,
 I used Tracegraph to analyse trace file of ns-2. I found that it works
 good
 when there is no frequent packet drops and retransmission. In a simulation
 where a large packet drops and retransmission exist (for example in my
 case
 I used the shadowing model in the PHY layer and used a multihop scenario
 with up to 4 hops) Tracegraph fails to give a correct analysis results. I
 think that Tracegraph CANNOT BE TRUSTED in all simulation scenarios. One
 should check his results using another tool (do some sample checks with
 awk
 or perl or grep command).
 Yours,
 Samer

 - Original Message -
 From: Old Maven [EMAIL PROTECTED]
 To: ns-users@ISI.EDU
 Sent: Saturday, February 24, 2007 7:29 PM
 Subject: Re: [ns] ns2 post-analysis of the trace files


 
  I used ns2 simulator to create trace files in two formats from tdma
  simulation.
 
  1) old wireless format
  2) new wireless format
 
  I usually feed this to tracegraph to get my results and plot them. I
  have
  been looking for custom AWK/PERL scripts to write those analysis myself.
 
  In the old wireless format , with some simple counts and pattern
 matching,
  i
  can find the generated packets, dropped packets and bytes, forwarded
  packets
  and bytes. But sent packets: i couldnt find anyway that matches with the
  output from the tracegraph file.
 
  And when i run the same scripts for the new wireless format .. [ i mean
  the
  idea same with counts ] , most of the parameters differ. Basically, i
 have
  to come up with scripts to calculate average delay, variation in delays
  (or
  jitter), throughput in bits per seconds, packets
  generated/sent/forwarded/dropped.
 
 
  Is there any available scripts already, or any documentation that can
 lead
  me to find the exact definition of how to calculate these.[ in the new
  wireless format ].
 
  I tried this link
  http://mailman.isi.edu/pipermail/ns-users/2004-September/044669.htmlfrom
  the archives, but no luck.
 
  Thanks

Re: [ns] ns2 post-analysis of the trace files

[Old Maven]

I used ns2 simulator to create trace files in two formats from tdma
simulation.

1) old wireless format
2) new wireless format

I usually feed this to tracegraph to get my results and plot them. I have
been looking for custom AWK/PERL scripts to write those analysis myself.

In the old wireless format , with some simple counts and pattern matching, i
can find the generated packets, dropped packets and bytes, forwarded packets
and bytes. But sent packets: i couldnt find anyway that matches with the
output from the tracegraph file.

And when i run the same scripts for the new wireless format .. [ i mean the
idea same with counts ] , most of the parameters differ. Basically, i have
to come up with scripts to calculate average delay, variation in delays (or
jitter), throughput in bits per seconds, packets
generated/sent/forwarded/dropped.


Is there any available scripts already, or any documentation that can lead
me to find the exact definition of how to calculate these.[ in the new
wireless format ].

I tried this link
http://mailman.isi.edu/pipermail/ns-users/2004-September/044669.html from
the archives, but no luck.

Thanks