| MPI_IBCAST(buffer, count, datatype, root, comm, request) | |
| INOUT buffer | starting address of buffer (choice) |
| IN count | number of entries in buffer (non-negative integer) |
| IN datatype | data type of buffer (handle) |
| IN root | rank of broadcast root (integer) |
| IN comm | communicator (handle) |
| OUT request | communication request (handle) |
int MPI_Ibcast(void* buffer, int count, MPI_Datatype datatype, int root, MPI_Comm comm, MPI_Request *request)
MPI_Ibcast(buffer, count, datatype, root, comm, request, ierror)
TYPE(*), DIMENSION(..), ASYNCHRONOUS :: buffer
INTEGER, INTENT(IN) :: count, root
TYPE(MPI_Datatype), INTENT(IN) :: datatype
TYPE(MPI_Comm), INTENT(IN) :: comm
TYPE(MPI_Request), INTENT(OUT) :: request
INTEGER, OPTIONAL, INTENT(OUT) :: ierror
MPI_IBCAST(BUFFER, COUNT, DATATYPE, ROOT, COMM, REQUEST, IERROR)
<type> BUFFER(*)
INTEGER COUNT, DATATYPE, ROOT, COMM, REQUEST, IERROR
This call starts a nonblocking variant of MPI_BCAST (see Section Broadcast ).
The example in this section uses an intracommunicator.
Example
Start a broadcast of 100 ints from process 0 to every process in the group, perform some computation on independent data, and then complete the outstanding broadcast operation.
MPI_Comm comm;
int array1[100], array2[100];
int root=0;
MPI_Request req;
...
MPI_Ibcast(array1, 100, MPI_INT, root, comm, &req);
compute(array2, 100);
MPI_Wait(&req, MPI_STATUS_IGNORE);