Question

I have two kind of jobs to do, foobar1 to be done 3 times in parallel and foobar2 to be done 5 times in parallel. My Idea is to make the master thread create those two teams of work. but I face one difficulty.

Is It possible to make a thread escape from a parallel loop ? I mean to realize such a code where the master task can escape the first team of work to create the second team

#pragma omp parallel num_threads(8)
{
    // first team of task which will execute the foobar1 function in parallel

    #pragma omp for schedule(static,1) nowait 
    for(i = 0; i < 3; i++)
    {
        #pragma omp master
        {
            //escape here to create a second team in parallel
        }

        foobar1();
    }

    // second team of task which will execute the foobar2
    #pragma omp for schedule(static,1) nowait
    for(j = 0; j < 5; j++)
    {
        foobar2();
    }
}

Answer 1

这里完全绕过你的问题的(明确)办法:

#pragma omp parallel for num_threads(8)
for(i = 0; i < 8; i++)
{
    if (i < 3){
        foobar1();
    }else{
        foobar2();
    }
}

如果这 t不合适,那么我所想的另一种解决办法是使用nes的平行主义。但这种情况令人迷惑。

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