| #include <stdio.h> |
| #include <stdlib.h> |
| #include <omp.h> |
| #include <sys/sysconf.h> |
| |
| int main (int argc, char *argv[]) |
| { |
| int nthreads, tid; |
| printf("SC_NPROCESSORS_ONLN: %ld\n", sysconf (_SC_NPROCESSORS_ONLN)); |
| printf("SC_NPROCESSORS_CONF: %ld\n", sysconf (_SC_NPROCESSORS_CONF)); |
| #pragma omp parallel default(shared) private(nthreads, tid) |
| /* Fork a team of threads giving them their own copies of variables */ |
| { |
| /* Obtain thread number */ |
| tid = omp_get_thread_num(); |
| printf("Hello World from thread = %d\n", tid); |
| /* Only main thread does this */ |
| if (tid == 0) |
| { |
| nthreads = omp_get_num_threads(); |
| printf("Number of threads = %d\n", nthreads); |
| } |
| } /* All threads join main thread and disband */ |
| |
| return 0; |
| } |
