Windows 中使用 VS Code 编译 MPI 和 OpenMP 程序

mpi

win 安装mpi

Win10下Microsoft MPI（MSMPI）的下载安装 - 知乎 (zhihu.com)

(34条消息) Dev配置MPI运行环境（msmpi）和OpenMP环境（运行通过）_devc++ mpi配置_一点年羊的博客-CSDN博客

#命令行运行启动多进程,需要进入hello.exe所在目录才能执行，否则会找不到程序
mpiexec -n4 hello.exe

ubuntu 安装mpi

(39条消息) ubuntu下mpich的安装与使用_乌班图 可执行程序cpi_Wu_uuuu的博客-CSDN博客

sudoapt-getinstall mpich

#检查安装位置which mpicc

测试

#编译
mpicc hello.c -o hello
#运行
mpirun -np4 ./hello

#include"mpi.h"#include<stdio.h>intmain(int argc,char**argv){int myid, numprocs;MPI_Init(&argc,&argv);MPI_Comm_rank(MPI_COMM_WORLD,&myid);MPI_Comm_size(MPI_COMM_WORLD,&numprocs);printf("Hello World! Process %d of %d\n", myid, numprocs);MPI_Finalize();return0;}

openmp

Ubuntu 安装openmp

检查gcc版本：gcc --version (GCC从4.2.0版本开始支持OpenMP)，如果没有gcc，先安装gcc

sudoaptinstall gcc

安装OpenMP

sudoaptinstall libomp-dev

测试

编译和运行程序：使用编译器编译 OpenMP 程序，并在命令行中使用“-fopenmp”选项启用 OpenMP 支持，例如：

#编译
gcc -fopenmp-o program program.c 
#运行
./program

使用export命令：可以使用export命令在当前会话中设置环境变量
其中，4代表您想要使用的线程数，可以根据需要进行修改。
exportOMP_NUM_THREADS=4

#include<omp.h>#include<stdio.h>#include<stdlib.h>intmain(int argc,char**argv){int nthreads, tid;/* Fork a team of threads giving them their own copies of variables */#pragmaomp parallel private(nthreads, tid){/* Obtain thread number */
        tid =omp_get_thread_num();printf("Hello World from thread = %d\n", tid);/* Only master thread does this */if(tid ==0){
            nthreads =omp_get_num_threads();printf("Number of threads = %d\n", nthreads);}}/* All threads join master thread and disband */return0;}

win下输出
注：我的电脑默认是8个线程，不同的电脑运行结果不同，就算是同一部电脑每次运行的结果也可能不同（4个线程并行执行，没有确定的先后顺序）

Hello World from thread = 4
Hello World from thread = 1
Hello World from thread = 0
Number of threads = 8
Hello World from thread = 5
Hello World from thread = 6
Hello World from thread = 3
Hello World from thread = 7
Hello World from thread = 2

指定线程数

omp_set_num_threads(16);

#include<omp.h>#include<stdio.h>#include<stdlib.h>intmain(int argc,char**argv){int nthreads, tid;/* Fork a team of threads giving them their own copies of variables */omp_set_num_threads(16);#pragmaomp parallel private(nthreads, tid){/* Obtain thread number */
        tid =omp_get_thread_num();printf("Hello World from thread = %d\n", tid);/* Only master thread does this */if(tid ==0){
            nthreads =omp_get_num_threads();printf("Number of threads = %d\n", nthreads);}}/* All threads join master thread and disband */return0;}

VScode 配置mpi和openmp运行环境

【中英字幕】Windows 中使用 VS Code 编译 MPI 和 OpenMP 程序_哔哩哔哩_bilibili

前提已经安装好msmpi

.vscode目录下文件

c_cpp_properties.json

{"configurations":[{"name":"Win32","includePath":["${workspaceFolder}/**","${MSMPI_INC}"],//添加路径"defines":["_DEBUG","UNICODE","_UNICODE"],"compilerPath":"D:\\MyApps\\MinGW64\\bin\\gcc.exe","cStandard":"c17","cppStandard":"gnu++14","intelliSenseMode":"windows-gcc-x64"}],"version":4}

launch.json

{// 使用 IntelliSense 了解相关属性。// 悬停以查看现有属性的描述。// 欲了解更多信息，请访问: https://go.microsoft.com/fwlink/?linkid=830387"version":"0.2.0","configurations":[{"name":"g++.exe - 生成和调试活动文件","type":"cppdbg","request":"launch","program":"${fileDirname}\\${fileBasenameNoExtension}.exe","args":[],"stopAtEntry":false,"cwd":"${fileDirname}","environment":[],"externalConsole":false,"MIMode":"gdb","miDebuggerPath":"D:\\MyApps\\MinGW64\\bin\\gdb.exe","setupCommands":[{"description":"为 gdb 启用整齐打印","text":"-enable-pretty-printing","ignoreFailures":true}],"preLaunchTask":"C/C++: g++.exe 生成活动文件"}]}

tasks.json

{"tasks":[{"type":"cppbuild","label":"C/C++: g++.exe 生成活动文件","command":"D:\\MyApps\\MinGW64\\bin\\g++.exe","args":["-fdiagnostics-color=always","-g","${file}","-fopenmp",//编译openmp"-o","${fileDirname}\\${fileBasenameNoExtension}.exe"],"options":{"cwd":"${fileDirname}"},"problemMatcher":["$gcc"],"group":{"kind":"build","isDefault":true},"detail":"调试器生成的任务。"}],"version":"2.0.0"}

settings.json

{"files.associations":{"vector":"cpp","iostream":"cpp"},"files.exclude":{"**/.git":true,"**/.svn":true,"**/.hg":true,"**/CVS":true,"**/.DS_Store":true,// "**/.vscode": true,"**/*.exe":true}}