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Forum: Multithreading
Re: Question Multithreading for NeutronHP (Alex Kav)
Date: 22 May, 2015
From: Alex Kav <Alex Kav>

Dear Geant4 expert! I used the approach of using clones of my job with different random seeds to test speedup of my simulation. I’ve tested three different computers with my simulation. The simultaneous running multiple copies of my program were done. The time required for simulation of 10000 events (total) and speedup of simulation versus clone’s number were plotted and represented on the attached figures. As can be seen the maximum speedup was 4 times on one of the tested computers. Which computer parameters are the main factors for speedup of simulation? Will speedup is the same for running my program in multithread mode? I still have a problem with migration my program to MT mode. Could you recommended me (for my understanding of ways of code correction) some G4 example similarly to my case (14 MeV neutron source irradiate sample (soil) and gamma-detector collected the gamma spectra respond). I’ve compared “basic” and “hadronic” geant4 examples but did not found suitable example. For instance I cannot found using of ConstructSDandField() method for SensitiveDetector in codes.

Thanks in advance Alex Kav


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