MPI_Bcast

Broadcasts a message from the process with rank "root" to all other processes of the communicator

📝Syntax

A = MPI_Bcast(A, Root)
A = MPI_Bcast(A, Root, Comm)

📥Input Arguments

Parameter	Description
A	a nelson variable.
Root	a integer value: rank of broadcast root.
Comm	a MPI_Comm object.

📤Output Arguments

Parameter	Description
A	broadcasted array.

📄Description

This function is used to broadcast an array to all group members.

💡Examples

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

if ~MPI_Initialized()
  MPI_Init();
end
my_rank = MPI_Comm_rank();
num_ranks = MPI_Comm_size();
root = 0;
if (my_rank == 0)
  buff = 777;
else
  buff = 0;
end
disp(['rank: ', int2str(my_rank), ': before Bcast, buff is ', int2str(buff)])
buff = MPI_Bcast(buff, root);
disp(['rank: ', int2str(my_rank), ': after Bcast, buff is ', int2str(buff)])
if MPI_Initialized()
  MPI_Finalize();
end

🔗See Also

MPI_Barrier

🕔Version History

Version	Description
1.0.0	initial version

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