Dr. David Cronk Innovative Computing Lab University of ... - It works!

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6 Basic Functions MPI_INIT: Initialize MPI MPI_Finalize: Finalize MPI MPI_COMM_SIZE: How many processes are running MPI_COMM_RANK: What is my process number MPI_SEND: Send a message MPI_RECV: Receive a message David Cronk 30
MPI_INIT (ierr) ierr: Integer error return value. 0 on success, non-zero on failure. This MUST be the first MPI routine called in any program. Can only be called once Sets up the environment to enable message passing This is NOT how you run an MPI program David Cronk 31
Page 1 and 2: An Introduction to Parallel Program
Page 3 and 4: Day 2 Course Outline (cont) Morning
Page 5 and 6: Day 1 Morning - Lecture Course Outl
Page 7 and 8: Parallel Processing What is paralle
Page 9 and 10: Parallel Processing David Cronk 9
Page 11 and 12: Parallel Processing Why parallel pr
Page 13 and 14: Parallel Programming Outline › Pr
Page 15 and 16: Parallel Programming Message Passin
Page 17 and 18: Data Distribution David Cronk 17
Page 21 and 22: What is MPI Introduction to MPI ›
Page 23 and 24: What is MPI A standard library spec
Page 25 and 26: Continuing to grow! What is MPI ›
Page 29: Getting Started with MPI MPI contai
Page 33 and 34: Basic Program Structure program mai
Page 35 and 36: MPI_COMM_RANK (comm, rank, ierr) co
Page 37 and 38: program main include ‘mpif.h’ i
Page 39 and 40: Message Passing Message passing is
Page 41 and 42: Message Passing Processes are speci
Page 43 and 44: MPI_STATUS Since a receive call onl
Page 45 and 46: Types of data parallel MPI Programs
Page 47 and 48: Peer/SPMD Example Compute the sum o
Page 49 and 50: Master/Slave Example Master code: c
Page 51 and 52: Master/Slave Example Master code: c
Page 53 and 54: Unsafe Communication Patterns send
Page 55 and 56: Jacobi Iteration Initializations .
Page 57 and 58: Day 2 Course Outline (cont) Morning
Page 59 and 60: Point-to-Point Communication Modes
Page 61 and 62: MPI_ISEND (buf, cnt, dtype, dest, t
Page 63 and 64: MPI_WAIT (request, status, ierr) Re
Page 65 and 66: MPI_WAITALL (count, requests, statu
Page 67 and 68: MPI_TESTANY (count, requests, index
Page 69 and 70: Non-blocking Communication 100 cont
Page 71 and 72: Non-blocking communication J = 0 do
Page 73 and 74: Jacobi Iteration IF (myrank .EQ. 0)
Page 75 and 76: Point-to-Point Communication Modes:
Page 77 and 78: Point-to-Point Communication Modes:
Page 79 and 80: Ready Mode SLAVE MASTER while (!don
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TAKE A BREAK David Cronk 81
Page 83 and 84:
Collective Communication OUTLINE
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Collective Communication Synchroniz
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Collective Communication: Bcast MPI
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Collective Communication: Gather A
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MPI_Gather for (i = 0; i < 20; i++)
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Collective Communication: Gatherv (
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Collective Communication: Gatherv (
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MPI_SCATTER IF (MYPE .EQ. ROOT) THE
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Collective Communication: Scatterv
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Collective Communication: Allgather
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Allgatherv int mycount; /* inited t
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Allgatherv p1 p2 p3 p4 MPI_Comm_ran
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Collective Communication: Alltoallv
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Example subroutine System_Change_in
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Example (cont) if (.not. rand_festk
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Collective Communication: Reduction
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MPI_REDUCE REAL a(n), b(n,m), c(m)
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MPI_ALLREDUCE REAL a(n), b(n,m), c(
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Collective Communication: Prefix Re
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Collective Communication: Reduction
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Collective Communication: Performan
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Derived Datatypes › Introduction
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Derived Datatypes (cont) Typemap =
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Datatype Constructors MPI_TYPE_DUP
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Datatype Constructors (cont) MPI_TY
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EXAMPLE REAL a(100,100), B(100,100)
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MPI_TYPE_CREATE_STRUCT int i; char
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MPI_TYPE_CREATE_RESIZED Struct s1 {
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Datatype Constructors: Subarrays (1
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Datatype Constructors (cont) Derive
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int i; char c[100]; MPI_Aint disp[2
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TAKE A BREAK David Cronk 151
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Communicators and Groups Many MPI u
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Communicators and Groups(cont) P 2
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Group Management You can access inf
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Course Outline (cont) Day 3 Morning
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One Sided Communication By requirin
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One Sided Communication Get Put Add
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One Sided Communication Data moveme
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Dynamic Process Management Spawning
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MPI-I/O Introduction › What is pa
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What is parallel I/O INTRODUCTION
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What is parallel I/O INTRODUCTION
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INTRODUCTION (cont) Integer dim par
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INTRODUCTION (cont) Why use paralle
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INTRODUCTION (cont) What is MPI-I/O
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Recommended references MPI - The Co
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