mpi::mpi_reduce

#include <mpi.hpp>

Synopsis

1. template<typename T>

   T mpi_reduce (T const & x, communicator c = {}, int root = 0, bool all = false, MPI_Op op = MPI_SUM)
2. template<typename T>

   std::vector<regular_t<T>> mpi_reduce (std::vector<T> const & v,

   communicator c = {},

   int root = 0,

   bool all = false,

   MPI_Op op = MPI_SUM)

Documentation

Template parameters

• T Type to be reduced.

Parameters

• x Object to be reduced.

• c mpi::communicator.

• root Rank of the root process.

• all Should all processes receive the result of the reduction.

• op MPI_Op used in the reduction.

• v std::vector to reduce.

Returns

The result of the reduction.