MPI_STARTALL, MPI_Startall

Purpose

Activates a collection of persistent request operations.

C synopsis

#include <mpi.h>
int MPI_Startall(int count,MPI_request *array_of_requests);

C++ synopsis

#include mpi.h
void MPI::Prequest::Startall(int count, MPI::Prequest array_of_requests[]);

FORTRAN synopsis

include 'mpif.h' or use mpi
MPI_STARTALL(INTEGER COUNT,INTEGER ARRAY_OF_REQUESTS(*),INTEGER IERROR)

Parameters

count
     is the list length (integer) (IN)

array_of_requests
     is the array of requests (array of handle) (INOUT)

IERROR
     is the FORTRAN return code. It is always the last argument.

Description

MPI_STARTALL starts all communication associated with request operations in
array_of_requests. A communication started with MPI_STARTALL is completed
by a call to one of the MPI wait or test operations. The request becomes
inactive after successful completion but is not deallocated and can be
reactivated by an MPI_STARTALL. If a request is for a send with ready mode,
a matching receive must be posted before the call. If a request is for a
buffered send, adequate buffer space must be available.

Errors

Invalid count

Invalid request array

Request(s) invalid

Request(s) not persistent

Request(s) active

Insufficient buffer space
     only if a buffered send

MPI not initialized

MPI already finalized

Related information