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
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
Last updated
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