Messages can have different sizes and displacements. It is always the last argument. Description This routine collects individual messages from each task in comm and distributes the resulting message to all tasks.
Messages can have different sizes and displacements.
When you use this routine in a threaded application, make sure all collective operations on a particular communicator occur in the same order at each task. See Appendix G for more information on programming with MPI in a threaded environment. All rights reserved.