Hello Clément,
As you requested, see bugzilla #16359 Best regards Pierre P. De : Clément David <clement.da...@esi-group.com> Envoyé : lundi 2 mars 2020 12:25 À : Perrichon <perrichon.pie...@wanadoo.fr>; 'Users mailing list for Scilab' <users@lists.scilab.org> Cc : Clément David <clement.da...@esi-group.com> Objet : RE: [Scilab-users] Xcos 6.1.0 - benchmark time test Hello Pierre, Thanks for the numbers, I will try to describe what can be down to work around the time to results. >From when you start the simulation to the first scope popup, the schema is converted to a list of functions to be called in a specific order and passed to a solver that will iterate on time to run the simulation. There might be a difference between Scilab 5 and Scilab 6 as this transformation is written using the Scilab language. It is the 5s to 95s ratio. While the simulation is running, each blocks simulation function is called a number of times. The solver/simulator/function API did not change between Scilab 5 and Scilab 6, this should perform the same way. However, some functions, especially sciblk2 and sciblk4 are wrappers from C to Scilab functions and have been re-written to behave very differently. It is the 253s (258-5) to 4258s (4353-95) ratio (lower ratio but much more impact). Could you please file a bug with some representative example (same number of blocks, similar Scilab function) for further investigation ? Note: having costly sciblk2 and sciblk4 also highly depends on your schema, for example having them on a continuous loop will make the solver call them on each timestep. Regards, -- Clément From: Perrichon <perrichon.pie...@wanadoo.fr <mailto:perrichon.pie...@wanadoo.fr> > Sent: Monday, March 2, 2020 11:09 AM To: 'Users mailing list for Scilab' <users@lists.scilab.org <mailto:users@lists.scilab.org> >; Clément David <clement.da...@esi-group.com <mailto:clement.da...@esi-group.com> > Subject: RE: [Scilab-users] Xcos 6.1.0 - benchmark time test Hello Clément, Yes, I have some function blocks and expression blocks. Must I understand that I have to write CBLOCK for scilab function or scilab expression or both ? Here are other results for a more complex project name PELT1 Time request : 100 s Results : Xcos Scilab 5.5.2 : Durée de la simulation : 258.3 s Xcos Sciab 6.1.0 : Durée de la simulation : 4353.4 s So the ratio is 16.8 for PELT1 Other information : Scilab 5.5.2 : time between click go and first scope on the screen = 5 s Scilab 6.1.0 : time between click go and first scope on the screen = 95 s Ratio=19 and I also have other projects more complex Pelt1 is for 1 needle (2 positonning loop) Perlt6 for 6 !!! (7 positonning loop) BR De : users <users-boun...@lists.scilab.org <mailto:users-boun...@lists.scilab.org> > De la part de Clément David Envoyé : vendredi 28 février 2020 10:10 À : Users mailing list for Scilab <users@lists.scilab.org <mailto:users@lists.scilab.org> > Objet : Re: [Scilab-users] Xcos 6.1.0 - benchmark time test Hello Pierre, Are you using a block with its simulation function implemented in Scilab? Any C/C++ implemented block might perform the same at simulation time. In 6.0.2, implementing Xcos blocks using the Scilab language had some performance issues. In 6.1.0, I tried to speed up things a little bit by reusing some allocated data structure during simulation time [1] ; more work might still be needed here. [1]: http://cgit.scilab.org/scilab/commit/?id=bfe4f25275dc0d889817d10b63e10c9a064 1ef32 Regards, -- Clément From: users <users-boun...@lists.scilab.org <mailto:users-boun...@lists.scilab.org> > On Behalf Of Perrichon Sent: Friday, February 28, 2020 8:51 AM To: 'Users mailing list for Scilab' <users@lists.scilab.org <mailto:users@lists.scilab.org> > Subject: [Scilab-users] Xcos 6.1.0 - benchmark time test Hello, Here I test a PELTON basic algorithm under xcos, and record with tic-toc the simulation real time. These programs have been set for 120 s (scope) Results : Xcos Scilab 5.5.2 : Durée de la simulation : 45.4 s Xcos Sciab 6.1.0 : Durée de la simulation : 65.2 s So the ratio is 1.44 for a basic sheme Any explaination ? Can that be improved ? BR
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