This document describes the Message-Passing Interface(MPI)standard,version 3.1. The MPI standard includes point-to-point message-passing,collective communications,group and communicator concepts,process topologies,environmental management,process cre ation and management one-sided communications extended collective onerations external interfaces,I/O,some miscellaneous topics,and a profiling interface.Language bindings for C and Fortran are defined. Historically,the evolution of the standards is from MPI-1.0 (May 5,1994)to MPI-1.1 (June 12.1995)to MPl-1.2 (July 18.1997).with several clarifications and additions and published as part of the MPI-2 document,to MPI-2.0(July 18,1997),with new functionality. 10 to MPI-1.3 (May 30,2008),combining for historical reasons the documents 1.1 and 1.2 11 and some errata documents to one combined document.and to MPl-2.1(June 23.2008) 12 combining the previous documents.Version MPI-2.2(September 4,2009)added additional 13 clarifcation s and seven new routines.Version MPI-3.0(Se otember 21.2012)is an extension 14 of MPI-2.2.This version.MPI-3.1.adds clarifications and minor extensions to MPI-3.0 15 Comments.Please send comments on MPI to the MPI Forum as follows 1.Subscribe to http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi-comments 19 、一2 Send yoMngein oetherith the R.of the mbers on which you are Your comment will be forwarded to MPl Forum committee members for consideration. Messages sent from an unsubscribed e-mail address will not be considered. 25 29 30 31 32 之 9 A0 9193,19041995,196,197,2008,20,2012,2015 University of Te,Knoxvil D on to copy wit of th the Univ of Ter notice is given that copying is by permission of the University of Tennessee ument appear,and This document describes the Message-Passing Interface (MPI) standard, version 3.1. The MPI standard includes point-to-point message-passing, collective communications, group and communicator concepts, process topologies, environmental management, process cre￾ation and management, one-sided communications, extended collective operations, external interfaces, I/O, some miscellaneous topics, and a profiling interface. Language bindings for C and Fortran are defined. Historically, the evolution of the standards is from MPI-1.0 (May 5, 1994) to MPI-1.1 (June 12, 1995) to MPI-1.2 (July 18, 1997), with several clarifications and additions and published as part of the MPI-2 document, to MPI-2.0 (July 18, 1997), with new functionality, to MPI-1.3 (May 30, 2008), combining for historical reasons the documents 1.1 and 1.2 and some errata documents to one combined document, and to MPI-2.1 (June 23, 2008), combining the previous documents. Version MPI-2.2 (September 4, 2009) added additional clarifications and seven new routines. Version MPI-3.0 (September 21, 2012) is an extension of MPI-2.2. This version, MPI-3.1, adds clarifications and minor extensions to MPI-3.0 Comments. Please send comments on MPI to the MPI Forum as follows: 1. Subscribe to http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi-comments 2. Send your comment to: mpi-comments@mpi-forum.org, together with the URL of the version of the MPI standard and the page and line numbers on which you are commenting. Only use the official versions. Your comment will be forwarded to MPI Forum committee members for consideration. Messages sent from an unsubscribed e-mail address will not be considered. c 1993, 1994, 1995, 1996, 1997, 2008, 2009, 2012, 2015 University of Tennessee, Knoxville, Tennessee. Permission to copy without fee all or part of this material is granted, provided the University of Tennessee copyright notice and the title of this document appear, and notice is given that copying is by permission of the University of Tennessee. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 ii