mirror of
https://github.com/triqs/dft_tools
synced 2024-12-27 06:43:40 +01:00
66 lines
1.9 KiB
C++
66 lines
1.9 KiB
C++
/*******************************************************************************
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*
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* TRIQS: a Toolbox for Research in Interacting Quantum Systems
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*
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* Copyright (C) 2011 by O. Parcollet
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*
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* TRIQS is free software: you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* TRIQS is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* TRIQS. If not, see <http://www.gnu.org/licenses/>.
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*
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******************************************************************************/
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#include "./common.hpp"
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// order of include in horrible : on mac + clang, array (in fact boost::tuple) must come before boost::mpi
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#include "./src/array.hpp"
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#include <boost/mpi.hpp>
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#include <iostream>
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#include <sstream>
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using std::cout; using std::endl;
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using namespace triqs::arrays;
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namespace mpi=boost::mpi;
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int main(int argc, char* argv[])
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{
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mpi::environment env(argc, argv);
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mpi::communicator world;
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array<long,2> A (2,2), B(2,2),C(2,2);
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for (int i =0; i<2; ++i)
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for (int j=0; j<2; ++j)
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{ A(i,j) = (1+world.rank())*(10*i+ j);}
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if (world.rank() ==0) std::cout<<" A = "<<A<<std::endl;
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boost::mpi::reduce (world, A,C, std::plus<array<long,2> >(),0);
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int s= world.size();
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if (world.rank() ==0) std::cout<<" C = "<<C<< " should be "<< array<long,2>( (s*(s+1)/2) * A) <<std::endl;
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return 0;
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}
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/*
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if (0 && (world.size()>1)) {
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if (world.rank() == 0) {
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world.send(1, 0, A);
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} else {
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world.recv(0, 0, C);
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}
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world.barrier();
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if (world.rank() ==1) std::cerr<<" node "<<world.rank()<<" C = "<<C<<std::endl;
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}
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*/
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