The syntax of the blocking send operation is given below.
MPI_SEND(buf, count, datatype, dest, tag, comm)
int MPI_Send(void* buf, int count, MPI_Datatype datatype, int dest, int tag, MPI_Comm comm)
MPI_SEND(BUF, COUNT, DATATYPE, DEST, TAG, COMM, IERROR)
<type> BUF(*)
INTEGER COUNT, DATATYPE, DEST, TAG, COMM, IERROR
The blocking semantics of this call are described in Sec. 3.4.
MPI-Standard for MARMOT