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Справка Scilab >> Scilab MPI > MPI_Bcast

MPI_Bcast

Broadcasts a message from the process with rank root to all other processes of the group.

Calling Sequence

res = MPI_Bcast(value,rootID)

Arguments

value

The value to be sent to all nodes.

rootID

The source of the message

res

The broadcasted value

Description

Send a variable to all nodes. The value should be retrieved by the node with the function MPI_Recv.

On the internal technical side, two broadcasts are used transparently. The first one sends the size of the data, the second the data themself.

Examples

MPI_Init();
rnk =    MPI_Comm_rank();
sizeNodes =    MPI_Comm_size();

SLV = rnk;                // handy shortcuts, master is rank 0
Master = ~ SLV;            // slaves are all other
a=-1
if Master
// Declare a
a=42
end
b=MPI_Bcast(a, 0);
assert_checkequal(b,42);
MPI_Finalize();

See Also

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Last updated:
Thu Oct 02 14:01:18 CEST 2014