MPI_Send

Performs a blocking send.

📝 Syntax

• MPI_Send(A, destination, tag)

• MPI_Send(A, destination, tag, comm)

📥 Input argument

• A - an nelson array to send.

• destination - an integer value: rank of source.

• tag - an integer value: message tag.

• comm - a MPI_Comm object.

📄 Description

This function sends an array to a destination node on a given communicator with a specific message tag.

Note that there has to be a matching receive issued by the destination node.

Throws an exception if there is an error.

💡 Example

mpiexec([modulepath('mpi'), '/examples/MPI_helloworld.m'], 4)

if ~MPI_Initialized()
  MPI_Init();
end
comm = MPI_Comm_object()
my_rank = MPI_Comm_rank (comm)
num_ranks = MPI_Comm_size(comm)

TAG= 1;
if (my_rank != 0)
  rankvect = 0;
  MPI_Send(rand(3,3) + my_rank, rankvect, TAG, comm);
else
  disp('MPI master receive:')
  for source = 1:num_ranks - 1
    disp(['From slave ', int2str(source)])
    message = MPI_Recv (source, TAG, comm);
    disp(message)
  end
end

if MPI_Initialized()
  MPI_Finalize();
end

🔗 See also

MPI_Recv.

🕔 History

Version	📄 Description
1.0.0	initial version