#pragma omp parallel
指令。在Linux上使用OpenMP进行并行编程的配置方法
成都创新互联公司专注于英山企业网站建设,响应式网站建设,商城网站建设。英山网站建设公司,为英山等地区提供建站服务。全流程定制网站建设,专业设计,全程项目跟踪,成都创新互联公司专业和态度为您提供的服务
OpenMP(Open MultiProcessing)是一个用于C/C++和Fortran编程语言的共享内存并行编程模型,它提供了一套简单而有效的API,使得程序员可以方便地利用多核处理器进行并行计算,本文将介绍在Linux上使用OpenMP进行并行编程的配置方法。
1、安装GCC编译器
需要在Linux系统上安装GCC编译器,GCC是GNU编译器套件,支持多种编程语言,包括C、C++和Fortran,可以通过以下命令安装GCC:
sudo aptget update sudo aptget install gcc g++
2、安装OpenMP库
接下来,需要安装OpenMP库,可以通过以下命令安装:
sudo aptget install libompdev
3、编写OpenMP程序
创建一个名为hello_openmp.c
的文件,并输入以下代码:
#include#include int main() { int num_threads = omp_get_max_threads(); printf("Max number of threads: %d ", num_threads); #pragma omp parallel num_threads(num_threads) { int thread_id = omp_get_thread_num(); printf("Hello from thread %d ", thread_id); } return 0; }
4、编译OpenMP程序
使用以下命令编译hello_openmp.c
文件:
gcc fopenmp hello_openmp.c o hello_openmp
5、运行OpenMP程序
使用以下命令运行编译好的hello_openmp
程序:
./hello_openmp
输出结果应该类似于:
Max number of threads: 4 Hello from thread 0 Hello from thread 1 Hello from thread 2 Hello from thread 3
至此,已经在Linux上成功配置了OpenMP并行编程环境,接下来,我们将介绍一些与本文相关的问题及解答。
问题1:如何在Windows上安装OpenMP?
答:在Windows上安装OpenMP的方法与Linux类似,需要安装Visual Studio或者MinGW编译器,从微软官网下载并安装Visual C++ Build Tools或者MinGW,在项目属性中启用OpenMP支持即可,具体步骤可以参考微软官方文档。
问题2:如何查看当前系统的OpenMP支持情况?
答:可以通过以下命令查看当前系统的OpenMP支持情况:
gcc v | grep openmp
如果输出中包含libgomp
字样,说明当前系统支持OpenMP,还可以通过以下命令查看系统中可用的CPU核心数:
nproc all || sysctl n hw.ncpu || ncpu all || grep c processor /proc/cpuinfo || lscpu | grep '^CPU(s):' | uniq | awk '{print $2}' || getconf _NPROCESSORS_ONLN || wmic cpu get NumberOfCores || taskset c | wc l || cat /proc/cpuinfo | grep "physical id" | sort u | wc l || sysctl n hw.physicalcpu || kstat p "cpu:*" | grep "cores per socket" | tail 1 | awk '{print $3}' || lscpu | grep '^CPU(s):' | uniq | awk '{print $2}' | xargs echo $(($(cat /proc/cpuinfo | grep "physical id" | sort u | wc l) * $(sysctl n hw.physicalcpu))) || dmidecode t processor | grep "Core Count" | uniq | awk '{print $2}' || dmidecode t processor | grep "Number of Cores" | uniq | awk '{print $2}' || lshw class processor | grep "Core(s) per socket" | uniq | awk '{print $2}' || lshw class processor | grep "Socket(s)" | uniq | awk '{print $2}' || lshw class processor | grep "Core(s) per core" | uniq | awk '{print $2}' || lshw class processor | grep "Thread(s) per core" | uniq | awk '{print $2}' || lshw class processor | grep "HyperThreading" | uniq | awk '{print $2}' || lshw class processor | grep "Max CPU frequency" | uniq | awk '{print $2}' || lshw class processor | grep "Current CPU frequency" | uniq | awk '{print $2}' || lshw class processor | grep "CPU cache size" | uniq | awk '{print $2}' || lshw class processor | grep "CPU cache level" | uniq | awk '{print $2}' || lshw class processor | grep "CPU core speed" | uniq | awk '{print $2}' || lshw class processor | grep "CPU voltage" | uniq | awk '{print $2}' || lshw class processor | grep "CPU fan speed" | uniq | awk '{print $2}' || lshw class processor | grep "CPU temperature" | uniq | awk '{print $2}' || lshw class processor | grep "CPU power management" | uniq | awk '{print $2}' || lshw class processor | grep "CPU package size" | uniq | awk '{print $2}' || lshw class processor | grep "CPU physical id" | uniq | awk '{print $2}' || lshw class processor | grep "CPU core id" | uniq | awk '{print $2}' || lshw class processor
文章题目:在Linux上使用OpenMP进行并行编程的配置方法
链接地址:http://www.shufengxianlan.com/qtweb/news23/499173.html
网站建设、网络推广公司-创新互联,是专注品牌与效果的网站制作,网络营销seo公司;服务项目有等
声明:本网站发布的内容(图片、视频和文字)以用户投稿、用户转载内容为主,如果涉及侵权请尽快告知,我们将会在第一时间删除。文章观点不代表本网站立场,如需处理请联系客服。电话:028-86922220;邮箱:631063699@qq.com。内容未经允许不得转载,或转载时需注明来源: 创新互联