|Message: Re: Saving partial results||Not Logged In (login)|
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sorry for the late answer.
> > Question 1: When a thread detects that (N % 50) == 0, is it possible to > somehow merge all the events processed so far across all threads so that > the output can be written to file? >
No this is not possible, because this would require synchronization between threads during event loop that would cause a large CPU penalty.
> > Question 2: Is there a convenient way to process only a subrange of the > events in a run? Maybe a check in BeginOfEventAction to skip the entire > event unless it is in the desired range. Can this be done?
I think you have already found the correct solution to your problem. The solution is to make separate runs. A G4UserRunAction should be used. For example: t=Nevt/Ntot + Ntot*Nrun where Nrun is the run number.
Geant4 will guarantee that G4Run are correctly merged and threads are synchronized between the runs that compose your job.