Windows 中使用 VS Code 编译 MPI 和 OpenMP 程序

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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)

(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 -n 4 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

sudo apt-get install mpich

#检查安装位置
which mpicc

测试

#编译
mpicc hello.c -o hello
#运行
mpirun -np 4 ./hello

#include "mpi.h"
#include <stdio.h>int main (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 ();return 0;
}

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

sudo apt install gcc

安装OpenMP

sudo apt install 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。
export OMP_NUM_THREADS=4

#include <omp.h>
#include <stdio.h>
#include <stdlib.h>int main (int argc, char **argv) {int nthreads, tid;/* Fork a team of threads giving them their own copies of variables */#pragma omp 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 */return 0;
}

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>int main (int argc, char **argv) {int nthreads, tid;/* Fork a team of threads giving them their own copies of variables */omp_set_num_threads(16);#pragma omp 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 */return 0;
}

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: /?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}
}