[R-sig-hpc] care to send me some big working example R on multiprocessor systems

Melwin win at comets.de
Thu Mar 4 09:35:38 CET 2010

Hi Deb,
PPSO in parallel mode should also run on a single processor, although you  
won't gain anything from that beyond just testing (in fact, I will be  
slower due to the overhead involved, unless your objective function takes  
long to evaluate without computational burden, e.g. due to extensive file  
Which Windows MPI-variant do you use (MPICHII or DeinoMPI)? I tested your  
code snippet successfully on Windows 2000/DeinoMPI/R-2.10.0. In any case,  
I recommend using optim_ppso_robust, which is more elaborated by now.
Please let me know if you experience further problems.


Am 04.03.2010, 00:50 Uhr, schrieb Debabrata Midya  
<Debabrata.Midya at services.nsw.gov.au>:
> Melwin,
> Thanks in advance.
> I am using Windows XP and trying to use ppso especially the parallel  
> mode using Rmpi.
> I have installed R-2.10.1, ppso_0.9-921.zip and Rmpi_0.5-9.zip.
> I need your assistance to solve the problem below:
>  1. Currently I have only 1 processor. Is it possible to use optim_ppso  
> or optim_ppso_robust on 1 processor?
> 2. When I run:
>         result = optim_ppso(objective_function=rastrigin_function,  
> nslaves=1, max_number_function_calls=200, projectfile=NULL,  
> logfile=NULL)     #standard version
> The system hangs.
> Once again thank you very much for the time you have given.
> Regards,
> Deb

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