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OpenMP£¨Open Multi-Processing£©ÊÇÒ»ÖÖÖ§³Ö¹²ÏíÄÚ´æ²¢Ðбà³ÌµÄ±ê×¼¡£ËüÄܹ»ÔÚ¶à¸ö´¦ÀíÆ÷½¹µãÖÐʵÏÖ²¢ÐÐÔËË㣬Ìá¸ß³ÌÐòµÄÖ´ÐÐЧÂÊ¡£±¾ÎĽ«ÏÈÈÝÔÚLinux²Ù×÷ϵͳÉÏʹÓÃOpenMP¾ÙÐв¢Ðбà³ÌµÄÉèÖÃÒªÁ죬²¢Í¨¹ý´úÂëʾÀý¾ÙÐÐÏêϸ˵Ã÷¡£

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sudo apt-get install libomp-dev

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sudo nano /etc/environment

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OMP_NUM_THREADS=<n>

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#include <stdio.h>
#include <omp.h>

int main() {
    // ÉèÖò¢ÐÐÇøÓò
    #pragma omp parallel
    {
        // »ñÈ¡Ï̱߳àºÅ
        int tid = omp_get_thread_num();
        // »ñÈ¡Ïß³Ì×ÜÊý
        int num_threads = omp_get_num_threads();
        
        printf("Hello from thread %d of %d
", tid, num_threads);
    }
    
    return 0;
}

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gcc -fopenmp omp_example.c -o omp_example

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./omp_example

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