MPI_Bcast(

1
MPI_Bcast( data, count, type, root, comm )

• Stephen Mahoney
• Yana Novikova
• Susan Lister

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int data 0 //initiate the data variableif(
node 0 ) //have the root process take user
input scanf( d, data ) //user input will
be 5 in this example//broadcast the updated
variable value to the rest of the processes
MPI_Bcast( data, 1, MPI_INT, 0,
MPI_WORLD_COMM)
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Proc0 Proc1 Proc2 Proc3 Proc4 Proc5 Proc6 Proc7
0 0 0 0 0 0 0 0
5 0 0 0 0 0 0 0
5 5 5 5 5 5 5 5
int data 0
scanf( d, data )
MPI_Bcast (data, 1, MPI_INT, 0, MPI_WORLD_COMM)