Simulation Time

[Mohammad Arouri]

Hi All ..
Am new to omnet and may be my question is simple, but i really need its answer.
How i can change the simulation time in omnet.
i need to change it, to make it reflects the timing of the real case am working on
Thanks

[Rudolf Hornig]

You cannot. The advancement of the simulation time is handled by the OMNET kernel (you cannot change the time in the real world either :) ). You can schedule events / messages into the future to arrive at certain gates of certain modules, but the incrementing of simtime will be handled by the kernel.

Rudolf

 

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[Mohammad Arouri]

Thank you Hornig, i used the function scheduleAt(time,event) to move the timing of the simulation, and this solved my problem, so thanks again

--
M.Arouri

[zahian ismail]

hi,

 

as Rudolf replied;

 

"You cannot. The advancement of the simulation time is handled by the OMNET kernel (you cannot change the time in the real world either :) ). You can schedule events / messages into the future to arrive at certain gates of certain modules, but the incrementing of simtime will be handled by the kernel.

Rudolf"

 

for my simulaiton,

i have set the simulation time limit like this:

 

sim-time-limit

= 3000seconds

 

the simulation did not stop after 3000s.
so i choose the express mode for simulation.

does this will affects the simulation result?

 

thank you.

Zahian Binti Ismail
Network Management Group
Department of Computer Science
Faculty of Information Science & Technology
Universiti Kebangsaan Malaysia
43600 Bangi
Selangor
Tel: 03-89216657

[Anas N. Mousa]

Hi Zahian,

No, using Express running mode will not affect the results; it just
fasten the run of the simulation by disabling almost all graphical
details that shows the progress of the simulation (everything but the
inspectors by default, unless you choose to disable the update of the
inspectors)......

so, it's just to run the simulation much faster......

regards,

On Jan 24, 4:04 am, zahian ismail <zahianism...@gmail.com> wrote:
>  hi,
>
> as Rudolf replied;
>
> "You cannot. The advancement of the simulation time is handled by the OMNET
> kernel (you cannot change the time in the real world either :) ). You can
> schedule events / messages into the future to arrive at certain gates of
> certain modules, but the incrementing of simtime will be handled by the
> kernel.
>
> Rudolf"
>
> for my simulaiton,
> i have set the simulation time limit like this:
>
> sim-time-limit = 3000seconds
>
> the simulation did not stop after 3000s.
> so i choose the express mode for simulation.
> does this will affects the simulation result?
>
> thank you.
> On Sat, Jan 23, 2010 at 5:50 AM, Mohammad Arouri

> <mohammadaro...@gmail.com>wrote:

>
>
>
> > Thank you Hornig, i used the function scheduleAt(time,event) to move the
> > timing of the simulation, and this solved my problem, so thanks again
>

> > On Fri, Jan 22, 2010 at 11:27 PM, Rudolf Hornig <rudolf.hor...@gmail.com>wrote:
>
> >>   On Fri, Jan 22, 2010 at 6:16 PM, Mohammad Arouri <

> >> mohammadaro...@gmail.com> wrote:
>
> >>> Hi All ..
> >>> Am new to omnet and may be my question is simple, but i really need its
> >>> answer.
> >>> How i can change the simulation time in omnet.
> >>> i need to change it, to make it reflects the timing of the real case am
> >>> working on
> >>> Thanks
>
> >> You cannot. The advancement of the simulation time is handled by the OMNET
> >> kernel (you cannot change the time in the real world either :) ). You can
> >> schedule events / messages into the future to arrive at certain gates of
> >> certain modules, but the incrementing of simtime will be handled by the
> >> kernel.
>
> >> Rudolf
>
> >>>  --
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> >>>http://groups.google.com/group/omnetpp?hl=en.
>
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>
> > --
> > M.Arouri
>
> > --
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[Rudolf Hornig]

sim-time-limit= 3000seconds

Seconds is definitely not a valid unit. Use s instead.

The simulation should stop correctly after 3000s. If not then this is a bug. Please provide your INI file and ned file and report the bug.

Rudolf

[zahian ismail]

thanks anas.

 

means 3000s in simulation is not the same as 3000s in real time.

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[zahian ismail]

hi rudolf,

 

i've attached the INI file and ned file.

for the simulation i applied inetmanet framework.

 

thank you.

On Sun, Jan 24, 2010 at 11:39 PM, Rudolf Hornig <rudolf...@gmail.com> wrote:

sim-time-limit= 3000seconds

Seconds is definitely not a valid unit. Use s instead.

The simulation should stop correctly after 3000s. If not then this is a bug. Please provide your INI file and ned file and report the bug.

Rudolf

On Sun, Jan 24, 2010 at 3:04 AM, zahian ismail <zahian...@gmail.com> wrote:

hi,

 

as Rudolf replied;

 

"You cannot. The advancement of the simulation time is handled by the OMNET kernel (you cannot change the time in the real world either :) ). You can schedule events / messages into the future to arrive at certain gates of certain modules, but the incrementing of simtime will be handled by the kernel.

Rudolf"

 

for my simulaiton,

i have set the simulation time limit like this:

 

sim-time-limit

= 3000seconds

 

the simulation did not stop after 3000s.
so i choose the express mode for simulation.

does this will affects the simulation result?

 

--
Zahian Binti Ismail

[Rudolf Hornig]

Ah ok... You were expecting to run your simulation for 5 minutes?

If you want to limit your simulation in real-time, use:

cpu-time-limit=3000seconds

Simulation time and real (wall clock) time are not the same thing.

Rudolf

[zahian ismail]

again.

 

thank you so much rudolf..