programmainimplicit noneinclude'mpif.h'character*(MPI_MAX_PROCESSOR_NAME)processor_nameintegermyid,numprocs,namelen,rc,ierr,status(MPI_STATUS_SIZE)real(8)acallMPI_INIT(ierr)callMPI_COMM_RANK(MPI_COMM_WORLD,myid,ierr)! get process numbercallMPI_COMM_SIZE(MPI_COMM_WORLD,numprocs,ierr)! get the...
在Fortran中的MPI_开头函数都常有一个整数型的错误变量用以函数返回错误信息。如: call MPI_Barrier(MPI_COMM_WORLD,ierr) 在没有ierr参数时,程序可能会出项access violation出现。
MASTER =0IF(ICORE.EQ.MASTER)WRITE(6,'(I3,"-CORES ASSIGNED")') NCORECALLMPI_BARRIER(MPI_COMM_WORLD,IERR)C INPUT DATA 单个进程为各自的部分赋值DOI =1,10ICE =MOD(I,NCORE)IF(ICE.EQ.ICORE) A(I)=1.0*IENDDOC COMMUNICATION 进程通讯,以同步变量DO1J =1,10ICE =MOD(J,NCORE)IF(ICE.EQ.IC...
1. 程序最开始需调用mpi库 >>include'mpif.h' 2. 进入MPI工作环境需先输入下面三个命令 >> MPI_INIT(ierr) #初始化MPI工作环境 >> MPI_COMM_RANK(MPI_COMM_WORLD,myid,ierr) # myid: 进程号 >> MPI_COMM_SIZE(MPI_COMM_WORLD,numprocs,ierr) # numprocs: number of processors 3. 结束MPI工作环境需...
MPI_Barrier (MPI_COMM_WORLD);doubletime = -now();for(intk =0; k < NITER; ++k) {for(inti =0; i < nProc; ++i) { MPI_Request send_req[2]; MPI_Request recv_req[2];intslice_id =1;intleft_halo =0;intright_halo =2;// post recvMPI_Irecv( &array_ELEM_right (buffer_id, ...
14 call MPI_BARRIER( MPI_COMM_WORLD, ierr )15 16if ( myid .eq. 0) then 17 message1 = 'Hello, process 1'18 call MPI_SEND(message1,20,MPI_CHAR,1,99,MPI_COMM_WORLD,ierr)19 message2 = 'Hello, process 2'20 call MPI_SEND(message2,20,MPI_CHAR,2,99,MPI_COMM_WORL...
(1) 广播 (2) 收集 (3) 同步 >>MPI_Barrier(MPI_COMM_WORLD,ierr) 5.传递二维数组源数据按照从0进程到N进程依次输入到目标进程. 按照...1.程序最开始需调用mpi库 >> include 'mpif.h'2.进入MPI工作环境需先输入下面三个命令 >>MPI_INIT(ierr) #初始化MPI ...
2.测试基于MPI_Barrier()的并行程序 3.完成实验报告(MPI程序代码、运行结果截屏、实验分析总结) 程序: #include"stdafx.h" #include<stdio.h> #include"mpi.h" intmain(intargc,char** argv) { inttaskid, ntasks; intierr; MPI_Init(&argc, &argv); MPI_Comm_rank(MPI_COMM_WORLD, &taskid); MPI...
integer :: myid, numProcs, nameLen, ierr integer :: istat( mpi_status_size ) integer :: iid character(19) :: message call mpi_init( ierr ) ! 完成 MPI程序 的初始化工作 call mpi_comm_rank( mpi_comm_world, myid, ierr ) ! 获取当前进程标识号 ...
的数据不是送到某一进程而是要送到所有本组内的进程allgather如图33组内的多对多的分散收集alltoall如图33求和最大值最小值及用户定义的函数等的reduce操作scan或prefix操作databroadcasta0a0a0a0a0a0a0a1a4a0a5a2a3scattergathera1a4a0a5a2a333群体操作的图例1同步intmpibarriermpicommcomm它使得调用者阻塞直到该通信...