Part Ill: Message Passing Programming MPI: Message Passing Interface E Message-Passing Library approach to parallel programming: A collection of processes executes program written in standard sequential language augmented with calls to library of functions to send/receive massage. K Computation: In MPI programming model, a computation consists of one or more heavy weigh processes that communicate by calling library routines.The number of processes in an MPI computation is normally fixed Communication mechanism a Point-to-point communication operation e Collective communication operations (broadcast, summation etc. E Communicator: to allow the MPI programmers to define modules that allow subprograms to encapsulate communication operations 7 Basic MPI: Although MPI is a complex system including more than 200 functions, we can solve a wide range of problems using just six of its functions Both C language binding and Fortran language binding for MPI. NHPCC(Hefei)·USTC· CHINA glchenaustc edu.ciNHPCC(Hefei) •USTC •CHINA glchen@ustc.edu.cn MPI:Message Passing Interface + Message-Passing Library approach to parallel programming:A collection of processes executes program written in standard sequential language augmented with calls to library of functions to send/receive massage. + Computation:In MPI programming model,a computation consists of one or more heavy weigh processes that communicate by calling library routines.The number of processes in an MPI computation is normally fixed. + Communication mechanism : - Point-to-point communication operation. - Collective communication operations (broadcast,summation etc.). + Communicator:to allow the MPI programmers to define modules that allow subprograms to encapsulate communication operations. + Basic MPI:Although MPI is a complex system including more than 200 functions,we can solve a wide range of problems using just six of its functions! + Both C language binding and Fortran language binding for MPI. Part III:Message Passing Programming 3 - 10