Dear Jeff, Great that you got it working!
The speedup of only 30% for 4 cores is probably due to the fact that the example is too small for 4 cores. Once the simulation starts, there's no Python overhead. For higher resolutions you will see more effect of using multiple cores. Kind regards, Martin Fiers 2012/11/11 Jeff Chiles <[email protected]> > I finally got it working. The problem seemed to be a few things. But the > tweaks below (some of which you recommended) seem to work fine: > > -changed the "include" path in setup-mpi.py to link to a folder with the > files from meep-openmpi: meep.hpp and /meep/mympi.hpp and /meep/vec.hpp. > > -in the "meep-swig" part of setup-mpi.py, I changed the libraries > extension to ['meep_openmpi'] > > -I ran the script with "mpirun -n 4 python scriptname.py" and it works. > > I did however notice that the speedup seems to be very small for the > time-stepping portion, about 30% increase for 4 vs. 1 core. > > Thanks for your help with troubleshooting this though. > > Best regards, > Jeff > > > On Wed, Nov 7, 2012 at 3:26 AM, Nizamov Shawkat <[email protected] > > wrote: > >> Hello, >> >> 2012/11/6 Jeff Chiles <[email protected]>: >> > >> > Now it has another problem... when I execute a script with mpirun and >> the >> > "-np 2" argument, it seems that the program just executes two identical >> > copies of itself in parallel rather than splitting up any of the work: >> > >> > The command I use is >> > >> > mpirun -np 2 python python_meep_bent_wg_polygons.py >> > >> >> Please try: >> >> python python_meep_bent_wg_polygons.py -np 2 >> >> >> With best regards. >> Shawkat Nizamov >> > >
_______________________________________________ Mailing list: https://launchpad.net/~python-meep Post to : [email protected] Unsubscribe : https://launchpad.net/~python-meep More help : https://help.launchpad.net/ListHelp
