我想使用OpenMP并行化以下结构:
for (auto it = data.begin(); it != data.end(); ++it)
{
for (vector<my_element>::iterator it2 = it->begin(); it2 != it->end(); ++it2)
{
// code here (it2->process)
}
}
我尝试了不同的方法,但我无法使其正常工作。你能救我吗?。
我正在使用gcc 5.3.0,OpenMP 4.0。到目前为止我尝试过的解决方案没有成功:
解决方案1:
#pragma omp parallel
#pragma omp single
{
for (auto it = data.begin(); it != data.end(); ++it)
{
#pragma omp task firstprivate(it)
for (vector<my_element>::iterator it2 = it->begin(); it2 != it->end(); ++it2)
{
// code here (it2->process)
}
#pragma omp taskwait
}
}
解决方案2:
#pragma omp parallel
{
for (auto it = data.begin(); it != data.end(); ++it)
{
#pragma omp single nowait
{
for (vector<my_element>::iterator it2 = it->begin(); it2 != it->end(); ++it2)
{
// code here (it2->process)
}
}
}
}
答案 0 :(得分:1)
我认为你不应该致电omp taskwait
。
#pragma omp parallel
{
#pragma omp single
{
for (auto it = data.begin(); it != data.end(); ++it)
{
#pragma omp task firstprivate(it)
for (vector<my_element>::iterator it2 = it->begin(); it2 != it->end(); ++it2)
{
// code here (it2->process)
}
}
}
}