[Scilab-users] xcos_simulate()

[Clément David]

Hi (again Johan),

For your information, we track/fix issue on big models by testing them in internal workbench. If you have simulation issue, we can add your model on this non-opensource set to try to improve the compilation time for it. Don’t hesitate to mail it to me (might be a partial or without parameter knowledge).

Regards,

Clément

From: users <users-bounces at lists.scilab.org> On Behalf Of Johan Lafitte
Sent: Wednesday, February 10, 2021 6:41 PM
To: users at lists.scilab.org
Subject: [Scilab-users] xcos_simulate()

Hi,

My xcos model becomes quite large and takes time to compile. In order to launch batches and optimisation process, it seems possible to compile the model juste one time.
However, I meet the same difficulties as described in this post :

http://mailinglists.scilab.org/xcos-xcos-simulate-scs-m-1-or-xcos-simulate-scs-m-4-td4031207.html#a4031274">http://mailinglists.scilab.org/xcos-xcos-simulate-scs-m-1-or-xcos-simulate-scs-m-4-td4031207.html#a4031274

Indeed, the following script...
  ___________________________________
loadXcosLibs;
importXcosDiagram("C:\Users\johan\OneDrive\Micro entreprise\Technique\Kayak guide\Modélisation\Scilab\optimisation"+"\modèle physique et commande simple_10_opti.zcos");
tic();
xcos_simulate(scs_m, 4);
disp("méthode 2",toc());

tic();
%cpr = xcos_compile(scs_m);
disp( "Durée compilation",toc());

tic();
xcos_simulate(scs_m,1)
disp( "méthode 1",toc());
  ___________________________________

...gives the following results :
 ___________________________________
"scicos_simulate step 1"
   50.813412 s

  "scicos_simulate step 2"
   57.440604 s

  "xcos_simulate(scs_m, 4) méthode 2"
   58.808546 s

  "Compilation duration"
   55.615238 s

  "xcos_simulate(scs_m,1) méthode 1"
   61.133700 s
 ______________________________

It seems the compilation step is done in all these cases.

Thank you for your time and for your help

Johan

note 1 : when the final time of the simulation is set from 20s to 200s, the execution time increases about 15s

note 2 : according to the windows task manager, CPUs seem to be used about 30% during compilation and about 100% during simulation which takes few seconds
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