Show RunTime and Solve Problem that Data ReadOut Are Disordered in Geant4 Multi-thread Mode

How to show runtime

Using G4Timer in RunAction

time count start at the begin of run and stop at the end of run.

Detail Consturciton

declare a pionter to G4Timer in construct function.

fTimer = new G4Timer;

free memory of G4Timer in distruct function

delete fTimer;

time count start in BeginOfRunAction()

fTimer ->Start()

time count stop in EndOfRunAction()

fTimer ->Stop();

Result Shows

Time used will be showed in the end of run.

number of event = ... User=...s Real=...s Sys=...s

Solve Problem that Data ReadOut Are Disordered in Geant4 Multi-thread Mode

problem discription

I encountered a problem in Geant4 multi-thread run mode. The data readout from two different sensitive detector with hits are corrected in single thread mode but disordered in multi-thread run mode. I don't know how this problem should happen. I think there must be something wrong in the Merge() function. Memory storage may be disordered in the multi-thread mode.

problem solving

Do not use Geant4 Data Merge() in root mode

//analysisManager->SetNtupleMerging(true);
//or
analysisManager->SetNtupleMerging(false);