Using multicores for programming
 

Hi Friends,

I have intel core i5 processor. I am using Geant4 (geant4.cern.ch) on Ubuntu 12.04. When I run the process, only one core is used for that.

So, I would like to know how can I use all the cores for same process to save the time?
Is there need to do some setting in OS?

Thanks!!!
Summit

Multithreaded programming is not for the feint of heart. That being said you're using a program which does not support multiple cores. Simulation scripting is very different from a compiled language (e.g. C) where a programmer can use libraries (pthreads, openmp, openmpi, etc) to multi-thread and manage the threads. Since threaded programming is outside of the scope of your question I'll skip that as it doesn't apply here.

Looking at the Geant 4 website you provided I gather the program is currently single threaded. However, their planned features for 2013 state multi-threading (i.e. using multiple cores) is a goal. You'll have to contact the original developers to find out more information about it as I've just gleaned this from their website after a quick viewing.