[Ns-bugs] [Bug 388] document how to apply fuzz to models

[code@nsnam.ece.gatech.edu]

http://www.nsnam.org/bugzilla/show_bug.cgi?id=388





--- Comment #4 from Tom Henderson <tomh at tomh.org>  2009-01-10 21:42:44 EDT ---
(In reply to comment #3)
> How about implementing the following trivial API ?
> 
> class ApplicationContainer
> {
> public:
>   void Start (RandomVariable &v);
> };
> 
> app.Start (UniformVariable (0.9, 1.1));
> 
> There are lots of refinements which could be done on top of this basic idea but
> it seems to me that this would solve a lot of the use-cases we discussed in the
> past.
> 

This is probably too limiting:
- more than "start time" is needed (mainly, timeouts)
- more than applications need to be covered (e.g. devices, operating systems,
etc.)

I was thinking, maybe move timer.cc,h to src/core and add

Timer::SetFuzz (RandomVariable var);

plus, a documented suggestion for users to know how to insert fuzz time between
function calls, such as e.g.
  Simulator::Schedule (UniformVariable::GetSingleValue (),
                       &function, this, arg1, arg2, ...);

(or whatever UniformVariable::GetSingleValue () equivalent is with the new
random variable API).  

Application::Start () and application containers could have starting time fuzz
too, like you suggest.


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