mirror of
https://github.com/triqs/dft_tools
synced 2024-12-27 23:03:51 +01:00
87 lines
2.9 KiB
C++
87 lines
2.9 KiB
C++
/*******************************************************************************
|
|
*
|
|
* TRIQS: a Toolbox for Research in Interacting Quantum Systems
|
|
*
|
|
* Copyright (C) 2013 by O. Parcollet
|
|
*
|
|
* TRIQS is free software: you can redistribute it and/or modify it under the
|
|
* terms of the GNU General Public License as published by the Free Software
|
|
* Foundation, either version 3 of the License, or (at your option) any later
|
|
* version.
|
|
*
|
|
* TRIQS is distributed in the hope that it will be useful, but WITHOUT ANY
|
|
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
|
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
|
|
* details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with
|
|
* TRIQS. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
******************************************************************************/
|
|
#include <iostream>
|
|
#include <type_traits>
|
|
#include <triqs/arrays.hpp>
|
|
#include <triqs/utility/mpi.hpp>
|
|
#include <iostream>
|
|
#include <sstream>
|
|
|
|
using namespace triqs;
|
|
using namespace triqs::arrays;
|
|
using namespace triqs::mpi;
|
|
|
|
// a struct containing arrays. I only allow here boost serialization form, no mpi stuff here.
|
|
struct S {
|
|
array<long,2> x; array<double,1> y;
|
|
template<typename Ar> friend void serialize( Ar & ar, S & s) { ar & s.x; ar & s.y;}
|
|
};
|
|
|
|
int main(int argc, char* argv[]) {
|
|
|
|
mpi::environment env(argc, argv);
|
|
mpi::communicator world;
|
|
|
|
array<long,2> A {{1,2}, {3,4}}, C(2,2);
|
|
|
|
// boost mpi
|
|
boost::mpi::reduce (world, A,C, std::c14::plus<>(),0);
|
|
int s= world.size();
|
|
if (world.rank() ==0) std::cout<<" C = "<<C<< " should be "<< std::endl << array<long,2>(s*A) <<std::endl;
|
|
|
|
// triqs mpi
|
|
C = A;
|
|
mpi::reduce_in_place (world, C);
|
|
if (world.rank() ==0) std::cout<<" C = "<<C<< " should be "<< std::endl << array<long,2>(s*A) <<std::endl;
|
|
|
|
// test rvalue views
|
|
C = A;
|
|
mpi::reduce_in_place (world, C());
|
|
if (world.rank() ==0) std::cout<<" C = "<<C<< " should be "<< std::endl << array<long,2>(s*A) <<std::endl;
|
|
|
|
// more complex class
|
|
auto x = S { { {1,2},{3,4}}, { 1,2,3,4}};
|
|
mpi::reduce_in_place (world, x);
|
|
if (world.rank() ==0) std::cout<<" S.x = "<<x.x<<" S.y = "<<x.y<<std::endl;
|
|
|
|
// a simple number
|
|
double y = 1+world.rank(), z=0;
|
|
mpi::reduce(world,y,z);
|
|
if (world.rank() ==0) std::cout<<" y = "<<y<< " should be "<< 1+world.rank()<<std::endl;
|
|
if (world.rank() ==0) std::cout<<" z = "<<z<< " should be "<< s*(s+1)/2 <<std::endl;
|
|
mpi::reduce_in_place(world,y);
|
|
if (world.rank() ==0) std::cout<<" y = "<<y<< " should be "<< s*(s+1)/2 <<std::endl;
|
|
|
|
mpi::broadcast(world,C);
|
|
|
|
// reduced x,y,C, .... a variadic form
|
|
mpi::reduce_in_place_v (world, x,y,C);
|
|
|
|
// more complex object
|
|
auto ca = array< array<int,1>, 1 > { array<int,1>{1,2}, array<int,1>{3,4}};
|
|
auto cC = ca;
|
|
mpi::reduce_in_place (world, cC);
|
|
if (world.rank() ==0) std::cout<<" cC = "<<cC<< std::endl;
|
|
|
|
return 0;
|
|
}
|
|
|