Cypress CSC-1200T Guia do Utilizador descarregar pdf (Página 65)

Chapter 7. Interprocess communication 65

Fortran syntax Meaning

MPI_INIT(rc) Initialize the MPI session.

This should be the very ﬁrst call.

MPI_FINALIZE(rc) Terminate the MPI session.

This should be the very last call.

MPI_COMM_SIZE(comm, Get the number of processes in comm.

nproc, rc)

MPI_COMM_RANK(comm, Get my task id in comm.

myproc, rc)

MPI_SEND(buf, buflen, Sends data buf to process dest.

datatype, dest,

tag, comm, rc)

MPI_SSEND(buf, buflen, Sends data buf to process dest

datatype, dest, (synchronous send).

tag, comm, rc)

MPI_RECV(buf, buflen, Receives data to buf from src.

datatype, src, tag,

comm, status, rc)

MPI_BCAST(buf, buflen, Broadcast data from root to other

datatype, root, processes in comm.

comm, rc)

MPI_REDUCE(sbuf, rbuf, Performs global operation

buflen, datatype, (sum, max, ...) from sbuf to rbuf.

oper, root, comm, rc)

MPI_ISEND(buf, buflen, Sends data buf to process dest,

datatype, dest, tag, but does not wait for completion

comm, request, rc) (non-blocking send).

MPI_IRECV(buf, buflen, Receives data to buf from src,

datatype, src, tag, but does not wait for completion

comm, request, rc) (non-blocking receive).

MPI_WAIT(request, Checks whether a request has been

status, rc) completed.

Table 7.1: A list of important MPI routines.

1 2 ... 60 61 62 63 64 65 66 67 68 69 70 ... 123 124

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