Abstract

Introduction Current Status: No votes Collective communication capabilities are here for MPI-2, covering these areas: ffl Extension of MPI collective operations to intercommunicators ffl Extension of MPI collective operations to in-place buffers. ffl Two-phase collective communication of a limited form and a limited set of operations. ffl A generalized all-to-all collective operation 6.2 Two-phase Collective Communication Current Status: no votes In some applications, better performance can be achieved by separating the initiation and completion of a collective operation. For example, in some numerical applications, better performance can be achieved by overlapping other work (both computation and communication) with an MPI Allreduce. At the same time, the full generality of non-blocking collectiv

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