Version 4.0:June 9.2021.This version of the MPI-4 Standard is a major update and includes significant new functionality.The largest changes are the addition of large-count versions of many routines to address the limitations of using an int or INTEGER for the 3 count narameter persistent collectives,partitioned communications,an alternative way to initialize MPl,application info assertions,and improvements to the definitions of error 5 handling.In addition,there are a number of smaller improvements and corrections 6 This do in MPI-3.0.Addi nge ally,new added include pula king and rout 10 me for MPI_T riable 12 13 Version 3.0:September 21,2012.Coincident with the development of MPI-2.2,the MPI 4 Forum began discussions of a major extension to MPl.This document contains the MPl 5 3 Standard.This version of the MPl-3 standard contains significant extensions to MP 16 functionality,including nonblocking collectives,new one-sided communication operations, and Fortran 2008 bindings.Unlike MPI-2.2,this standard is considered a major update to 18 the MPI standard.As with previous versions,new features have been adopted only when here were compelling needs for the users.Some features.however.may have more than a 20 2 minor impact on existing MPl Implementations Version 2.2:September 4.2009. 23 This docum ont contains mostly corrections and clarifi. ations to the MPL2 1 documen A few extensions have been added.however all correct 25 MPI-2.1 programs are correct MPI-2.2 programs.New features were adopted only when 26 here were compelling needs for users.open source implementations.and minor impact on existing MPI implementations 28 tended Co MP-2.0, Ex fMPI-1.3. re Operations 32 errat rum are uded in this Version 1.3:May 30,2008.This document combines the previous documents MPI-1.1(June 2,1995)and the MPI-1.2 chapter in MPI-2(July 18,1997).Additional errata collected by the MPI Forum referring to MPI-1.1 and MPl-1.2 are also included in this document. 38 Version 2 0.luly 18 1997 Beginning after the release of MPl1 1 the MPl Forum began meeting to consider corrections and extensions.MPI-2 has been focused on process creation and management,one-sided communications,extended collective communications,external interfaces and parallel i/o.a miscellany chapter discusses items that do not fit elsewhere 43 in particular language interoperability. xten clarifications and mir 1.130 197.3he andard. Version 4.0: June 9, 2021. This version of the MPI-4 Standard is a major update and includes significant new functionality. The largest changes are the addition of large-count versions of many routines to address the limitations of using an int or INTEGER for the count parameter, persistent collectives, partitioned communications, an alternative way to initialize MPI, application info assertions, and improvements to the definitions of error handling. In addition, there are a number of smaller improvements and corrections. Version 3.1: June 4, 2015. This document contains mostly corrections and clarifications to the MPI-3.0 document. The largest change is a correction to the Fortran bindings introduced in MPI-3.0. Additionally, new functions added include routines to manipulate MPI_Aint values in a portable manner, nonblocking collective I/O routines, and routines to get the index value by name for MPI_T performance and control variables. Version 3.0: September 21, 2012. Coincident with the development of MPI-2.2, the MPI Forum began discussions of a major extension to MPI. This document contains the MPI- 3 Standard. This version of the MPI-3 standard contains significant extensions to MPI functionality, including nonblocking collectives, new one-sided communication operations, and Fortran 2008 bindings. Unlike MPI-2.2, this standard is considered a major update to the MPI standard. As with previous versions, new features have been adopted only when there were compelling needs for the users. Some features, however, may have more than a minor impact on existing MPI implementations. Version 2.2: September 4, 2009. This document contains mostly corrections and clarifi- cations to the MPI-2.1 document. A few extensions have been added; however all correct MPI-2.1 programs are correct MPI-2.2 programs. New features were adopted only when there were compelling needs for users, open source implementations, and minor impact on existing MPI implementations. Version 2.1: June 23, 2008. This document combines the previous documents MPI-1.3 (May 30, 2008) and MPI-2.0 (July 18, 1997). Certain parts of MPI-2.0, such as some sections of Chapter 4, Miscellany, and Chapter 7, Extended Collective Operations, have been merged into the chapters of MPI-1.3. Additional errata and clarifications collected by the MPI Forum are also included in this document. Version 1.3: May 30, 2008. This document combines the previous documents MPI-1.1 (June 12, 1995) and the MPI-1.2 chapter in MPI-2 (July 18, 1997). Additional errata collected by the MPI Forum referring to MPI-1.1 and MPI-1.2 are also included in this document. Version 2.0: July 18, 1997. Beginning after the release of MPI-1.1, the MPI Forum began meeting to consider corrections and extensions. MPI-2 has been focused on process creation and management, one-sided communications, extended collective communications, external interfaces and parallel I/O. A miscellany chapter discusses items that do not fit elsewhere, in particular language interoperability. Version 1.2: July 18, 1997. The MPI-2 Forum introduced MPI-1.2 as Chapter 3 in the standard “MPI-2: Extensions to the Message-Passing Interface”, July 18, 1997. This section contains clarifications and minor corrections to Version 1.1 of the MPI Standard. The only iii 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