G4MPIntupleMerger.cc

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// Class for configuring G4analysis for merging ntuples via MPI
//
// Author: Ivana Hrivnacova, 21/11/2018 (ivana@ipno.in2p3.fr)

#include "G4MPIntupleMerger.hh"
#include "G4RootMpiAnalysisManager.hh"
#include "G4ios.hh"

#include "tools/mpi/wrmpi"

#include <mpi.h>


G4MPIntupleMerger::G4MPIntupleMerger(G4int nofReducedNtupleFiles,
                                     G4bool rowWise, G4bool rowMode)
{
  // Configure MPI using  G4MPImanager

  // G4cout << "Start configure ntuple MPI merging" << G4endl;

  // Create MPI Root analysis manager
  G4bool isMaster = true;
  auto analysisManager
    = new G4RootMpiAnalysisManager(isMaster);
  // G4cout << "Start configure ntuple MPI merging" << G4endl;

  // Get communicator
  G4MPImanager* mpiManager = G4MPImanager::GetManager();
  G4int mpiRank = mpiManager->GetRank();
  G4int mpiSize = mpiManager->GetActiveSize();
  auto comm  = mpiManager->GetAllComm();

  // G4int tag = G4MPImanager::kTAG_NTUPLE;
  fWrmpi = new tools::mpi::wrmpi(G4cout, *comm);

  analysisManager->SetMpiNtupleMerging(
    fWrmpi, mpiRank, mpiSize, nofReducedNtupleFiles);
  analysisManager->SetNtupleRowWise(rowWise, rowMode);

  // G4cout << "End configure ntuple MPI merging" << G4endl;
}

G4MPIntupleMerger::~G4MPIntupleMerger()
{
  delete fWrmpi;
}