04-06-2006
I knew I shouldn't have gone to the picasso school of communication
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Hello.
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Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
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LEARN ABOUT OSX
mpi_start
MPI_Start(3OpenMPI) MPI_Start(3OpenMPI)
NAME
MPI_Start - Initiates a communication using a persistent request handle.
SYNTAX
C Syntax
#include <mpi.h>
int MPI_Start(MPI_Request *request)
Fortran Syntax
INCLUDE 'mpif.h'
MPI_START(REQUEST, IERROR)
INTEGER REQUEST, IERROR
C++ Syntax
#include <mpi.h>
void Prequest::Start()
INPUT PARAMETER
request Communication request (handle).
OUTPUT PARAMETER
IERROR Fortran only: Error status (integer).
DESCRIPTION
A communication (send or receive) that uses a persistent request is initiated by the function MPI_Start.
The argument, request, is a handle returned by one of the persistent communication-request initialization functions (MPI_Send_init,
MPI_Bsend_init, MPI_Ssend_init, MPI_Rsend_init, MPI_Recv_init). The associated request should be inactive and becomes active once the call
is made.
If the request is for a send with ready mode, then a matching receive should be posted before the call is made. From the time the call is
made until after the operation completes, the communication buffer should not be accessed.
The call is local, with semantics similar to the nonblocking communication operations (see Section 3.7 in the MPI-1 Standard, "Nonblocking
Communication.") That is, a call to MPI_Start with a request created by MPI_Send_init starts a communication in the same manner as a call
to MPI_Isend; a call to MPI_Start with a request created by MPI_Bsend_init starts a communication in the same manner as a call to
MPI_Ibsend; and so on.
ERRORS
Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument. C++ func-
tions do not return errors. If the default error handler is set to MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception mechanism
will be used to throw an MPI:Exception object.
Before the error value is returned, the current MPI error handler is called. By default, this error handler aborts the MPI job, except for
I/O function errors. The error handler may be changed with MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN may be
used to cause error values to be returned. Note that MPI does not guarantee that an MPI program can continue past an error.
SEE ALSO
MPI_Bsend_init
MPI_Rsend_init
MPI_Send_init
MPI_Sssend_init
MPI_Recv_init
MPI_Startall
Open MPI 1.2 September 2006 MPI_Start(3OpenMPI)