[Scilab-users] scilab and "parallelization" objectives

[Claus Futtrup]

Hi Paul

Have you/he/she looked into parallel_run() ?

Best regards,
Claus

On 22-10-2016 09:33, paul.carrico at free.fr wrote:
> Hi All
>
> Maybe my previous email was unclear, but the example hereafter 
> summarizes what I would like to do :
> - here function is launched when the previous is finished ("sequential 
> way"),
> - it is possible to launch them simultaneously?
>
> /_Nb_/: I'm currently on Scilab 5.5.4 and maybe only the latest beta 
> release  allows this ?
>
> If I can do this, then "bingo"
>
> Thanks
>
> Paul
> ---------------------------------------------------------------
> mode(0) function status=test(i, t) printf("function %d is 
> launched\n",i); sleep(t*1000); printf("function %d is endeed\n\n",i); 
> status = 0; endfunction // the duration is expressed in second(s) 
> status = test(1,1); status = test(2,3); status = test(3,5); status = 
> test(4,7);
>
> ------------------------------------------------------------------------
> *De: *"Paul Carrico" <paul.carrico at esterline.com>
> *À: *"International users mailing list for Scilab. 
> (users at lists.scilab.org)" <users at lists.scilab.org>
> *Envoyé: *Jeudi 20 Octobre 2016 15:41:18
> *Objet: *[Scilab-users] scilab and "parallelization" objectives
>
> Dear All,
>
> My internship had an interesting request and I’m not able to answer to 
> him JJ
>
> The context is the following one:
>
> -We are using a parallel finite element solver on *_4 processors_* 
> (under Linux),
>
> -We are performing optimization with an external optimizer,
>
> -Scilab has been interfaced with both the optimizer and the solver,
>
> -For the moment, the optimization loops are “basically” performed 
> using the parallelization capabilities of the solvers.
>
> In practice, Scilab “runs” the solver and “waits” the end of the 
> simulation (always using 4 processors) before calculating the cost 
> function value, giving the later value to the optimizer and then closing.
>
> *_Imagine that now_*we would like to run *_4 different simulations 
> each on 1 processor_* in order to determine the gain (CPU time) … how 
> to proceed ?
>
> In practice Scilab must be able to :
>
> -Launch 1rst calculation and to handback …
>
> -… to launch the 2^nd one … and so on
>
> We can imagine creating _a function per calculation _(and I prefer in 
> order to mix stuffs), then running independently but at the same time 
> the different functions.
>
> Honestly I’ve never done this before and I’m wondering how to proceed 
> … or if it is possible : any feedback on it ?
>
> Thanks and regards
>
> Paul
>
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