mirror of
https://github.com/triqs/dft_tools
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79 lines
2.1 KiB
C++
79 lines
2.1 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) 2013 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 <iostream>
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#include <type_traits>
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#include <triqs/arrays.hpp>
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#include <triqs/mpi.hpp>
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#include <iostream>
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#include <fstream>
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#include <sstream>
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using namespace triqs;
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using namespace triqs::arrays;
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using namespace triqs::mpi;
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template <typename T>
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std::ostream & operator << (std::ostream & out, std::vector<T> const & v) {
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for (size_t i =0; i<v.size(); ++i) out<< v[i];
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return out;
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}
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int main(int argc, char* argv[]) {
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mpi::environment env(argc, argv);
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mpi::communicator world;
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// using ARR = array<double,2>;
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using VEC = std::vector<std::complex<double>>;
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VEC A(7), B(7), AA(7);
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clef::placeholder<0> i_;
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clef::placeholder<1> j_;
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triqs::clef::make_expr(A)[i_] << i_+1;
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B = mpi::scatter(A, world);
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VEC C = mpi::scatter(A, world);
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std::ofstream out("node" + std::to_string(world.rank()));
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out << " A = " << A << std::endl;
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out << " B = " << B << std::endl;
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out << " C = " << C << std::endl;
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for(auto &x: B) x *= -1;
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for(auto &x: AA) x = 0;
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AA = mpi::gather(B, world);
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out << " AA = " << AA << std::endl;
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mpi::broadcast(AA, world);
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out << " cast AA = " << AA << std::endl;
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for (auto &x : AA) x = 0;
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AA = mpi::allgather(B, world);
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out << " AA = " << AA << std::endl;
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}
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