[Click] nsclick wireless traces etc

[Michael Neufeld]

Hi-
OK, I've done a little poking around, though my memories of the tracing code are 
a little dim at this point... One thing that seems like it'd be worth checking 
out is the difference between the MobileNode TCL code and the ClickNode TCL code 
(in ns-mobilenode.tcl and ns-clicknode.tcl respectively). Specifically I'm 
seeing some calls to mobility-trace in the MobileNode code that aren't in the 
ClickNode code, e.g. in the add-interface method. It looks like mobility-trace 
has some effect on setting "newtrace" if I'm reading things correctly. The 
"add-interface" method was constructed using "copy/paste/modify" so it is 
especially vulnerable to changes in the mainline ns-2 code. Best of luck with 
this, as I recall getting the tracing code to work in the original nsclick patch 
gave me a fair bit of grief before I got things going. I'm not in a position to 
spend a whole lot of time on nsclick issues at this point, but definitely feel 
free to drop a line with questions -- I'll do my best to answer.

-Mike

David Bath wrote:
> Hey List, 
> 
> Sorry, me again.  I've done a bit of ns debugging, and in cmu-trace.cc
> (which seems to handle the tracing) there's a function CMUTrace::command
> which is responsible for setting the newtrace variable.
> 
> CMUTrace::command(int argc, const char*const* argv) {
> 
>         if(argc == 3) {
>                 if(strcmp(argv[1], "node") == 0) {
>                         node_ = (MobileNode*)
> TclObject::lookup(argv[2]);
>                         if(node_ == 0)
>                                 return TCL_ERROR;
>                         return TCL_OK;
>                 }
> 		if (strcmp(argv[1], "newtrace") == 0) {
> 			newtrace_ = atoi(argv[2]);
> 		        return TCL_OK;
> 		}
>         }
> 	return Trace::command(argc, argv);
> }
> 
> However, although it's being called, argv[1] is always "namattach" or
> "attach" or "target", so the newtrace_ variable is never set.
> 
> Any thoughts would be much appreciated!
> 
> Best Regards,
> 
> Dave
> 
> -----Original Message-----
> From: click-bounces at pdos.csail.mit.edu
> [mailto:click-bounces at pdos.csail.mit.edu] On Behalf Of David Bath
> Sent: 25 February 2007 21:26
> To: click at pdos.csail.mit.edu
> Subject: Re: [Click] nsclick wireless traces etc
> 
> Hi List,
> 
> A small update on this.  I've been working today to try and find a more
> precise set of conditions.  It seems I can't produce a new trace format
> if I use the a mobile node of type Click.
> 
> As suggested in the nsclick papers, I am using 
> 
> Simulator set node_factory_ Node/MobileNode/ClickNode
> 
> As soon as I do that, the use-newtrace directive appears to be being
> ignored.
> 
> I can't really find out a sensible combination of options to get more
> precise than this - purely that something about using a ClickNode
> prohibits traces in the new format.
> 
> Any thoughts very gratefully received!
> 
> Best Regards,
> 
> Dave
> 
> -----Original Message-----
> From: click-bounces at pdos.csail.mit.edu
> [mailto:click-bounces at pdos.csail.mit.edu] On Behalf Of David Bath
> Sent: 25 February 2007 01:17
> To: click at pdos.csail.mit.edu
> Subject: [Click] nsclick wireless traces etc
> 
> Hi List,
> 
> This may be the wrong place, but the nsclick lists appear to have moved
> and I haven't managed to track them down.  Please feel free to redirect
> me if this is best answered somewhere else.
> 
> I've been working with ns(2.3) and latest[checked out a few days ago]
> click(cvs).
> 
> As far as I can tell, basic features are working fine.  However, I'm
> having some problems with the trace format.  
> 
> I've tried the well documented: 
> 
> set tracefd [open "<filename>" w]
> $ns_ use-newtrace
> $ns_ trace-all $tracefd
> 
> But the trace file comes out in the old format still.
> 
> I also don't quite understand how the ClickNode factory works.  Is the
> standard mobilenode creation process triggered?  
> 
> i.e. is $ns_ node-config .... etc valid syntax? (I ask because setting
> movementTrace ON like this seems to make no difference).
> 
> Any help would be gratefully received.  I seem to have run dry on web
> resources on this issue (at least, I am supposing it's an nsclick thing
> as the standard instructions for ns don't seem to work).
> 
> Cheers,
> 
> Dave Bath
> University of Bristol
> 
> 
> 
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-- 
*******************************
Michael J. Neufeld, Ph.D.
Network Scientist
BBN Technologies
10 Moulton St.
Cambridge, MA 02138
http://www.bbn.com
*******************************