cout << "CPU number: " << omp_get_num_procs() << endl; cout << "Parallel area 1: " << endl; #pragma omp parallel //下面大括号内部为并行区域 { cout << "Num of threads is: " << omp_get_num_threads(); cout << "; This thread
omp_get_num_threads()— Returns the number of threads that OpenMP is using in this parallel region. omp_get_thread_num()— Returns the identifier of this thread; threads are numbered 0, 1, … 参考: Chapter 3: Moreppc.cs.aalto.fi/ch3/more/ 【团日活动】C++实现高性能并行计算——⑩...
The omp_get_max_threads routine returns an upper bound on the number of threads that could be used to form a new team if a parallel region without a num_threads clause were encountered after execution returns from this routine。 很清楚的说明了,这个”最大数量“是指在不使用num_threads的情况...
3. omp_get_max_threads: 从函数名看,貌似是“获取最大的线程数量”,是的,那么这个“最大的线程数量"的具体含义呢?下面是OpenMP文档上的一段话: The omp_get_max_threads routine returns an upper bound on thenumber of threads that could be used to form a new team if a parallel region without a...
voidtest_if(){int n=1,tid;printf("n = 1\n");#pragma omp parallelif(n>5)default(none)\private(tid)shared(n){tid=omp_get_thread_num();printf("thread %d is running\n",tid);}printf("\n");n=10;printf("n = 10\n");#pragma omp parallelif(n>5)default(none)\private(tid)share...
h> int main() { printf("serial part, total number of threads: %d\n\n", omp_get_num_threads());//1 #pragma omp parallel //12个线程 { printf("Hello World, total number of threads: %d\n", omp_get_num_threads()); } return 0; } #pragma omp parallel for循环 后面是for循环,...
cout << "CPU number: " << omp_get_num_procs() << endl; cout << "Parallel area 1: " << endl; #pragma omp parallel //下面大括号内部为并行区域 { cout << "Num of threads is: " << omp_get_num_threads(); cout << "; This thread ID is " << omp_get_thread_num() << ...
{ printf("Hello World, total number of threads: %d\n", omp_get_num_threads()); }...
// omp_parallel.cpp // compile with: /openmp #include <stdio.h> #include <omp.h> int main() { #pragma omp parallel num_threads(4) { int i = omp_get_thread_num(); printf_s("Hello from thread %d\n", i); } } Output 复制 Hello from thread 0 Hello from thread 1 Hello fr...
void report_num_threads(int level) { #pragma omp single { printf("Level %d: number of threads in the team - %d\n", level, omp_get_num_threads()); } } void nested(int depth) { if (depth == DEPTH) return; #pragma omp parallel num_threads(2) ...