int omp_get_num_procs(void) 返回当前可用的处理器个数 int omp_get_num_threads(void) 返回当前并行区域中活动线程的个数,如果在并行区域外部调用,返回1 int omp_get_thread_num(void) 返回当前的线程号(omp_get_thread_ID更好一些) int omp_set_num_threads(void) 设置进入并行区域时,将要创建的线程个...
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...
#include<iostream>#include<omp.h>voidHello(void){intmy_id=omp_get_thread_num();intmy_rank=omp_get_num_threads();std::cout<<"Hello from thread "<<my_id<<" of "<<my_rank<<std::endl;}intmain(intargc,char**argv){{intnthread=4;#pragma omp parallel num_threads( nthread )Hello(...
\n", thread_id); if (thread_id == 0) { num_threads = omp_get_num_threads(); printf("Total number of thread is: %d\n", num_threads); } } // printf("End of parallel: %d, %d\n", thread_id, num_threads); // End of parallel: 1, 61694048 return 0; } 编译运行: $ gcc...
// omp_atomic.cpp// compile with: /openmp#include<stdio.h>#include<omp.h>#defineMAX 10intmain(){intcount =0;#pragmaomp parallel num_threads(MAX){#pragmaomp atomiccount++; } printf_s("Number of threads: %d\n", count); } Output复制 ...
//file name: test_openmp.c#include<stdio.h>#include<omp.h>intmain(int argc,char**argv){int num_thread=4;omp_set_num_threads(num_thread);#pragma omp parallel{int id=omp_get_thread_num();printf("hello from thread%d\n",id);}return0;} ...
int my_end = (this_thread + 1) * 10 / num_threads; for (int n = my_start; n < my_end; ++n) printf("%d ", n); 123456 1. 2. 3. 4. 5. 6. 7. 以上代码中,omp_get_thread_num()用于获取当前线程在当前线程组中的序号;omp_get_num_threads()用于获取线程组中的线程数。所以线程...
10 How can I set the number of OpenMP threads from within the program? 2 How can I get the maximum number of OpenMP threads that may be created during the whole execution of the program? 2 OpenMP #pragma num_threads 0 OpenMP actual number of threads 0 Is there ...
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()); } } int main() { omp_set_dynamic(0); #pragma omp parallel num_threads(2) ...
omp_get_max_threads Show 18 more Provides links to functions used in the OpenMP API. The Visual C++ implementation of the OpenMP standard includes the following functions and data types. For environment execution: FunctionDescription omp_set_num_threadsSets the number of threads in upcoming parallel...