<< MPI_Barrier

Message Passing Interface

MPI_Comm_delete >>

---

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 argument

---

A

a nelson variable.

Root

a integer value: rank of broadcast root.

Comm

a MPI_Comm object.

Output argument

---

A

broadcasted array.

Description

---

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

See also

---

MPI_Barrier.

Example

---

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

History

---

Version	Description
1.0.0	initial version

Author

---

Allan CORNET