OMP - 线程数多于处理器数量？

Question

By default OpenMP directive:

opm_get_num_threads gives number of threads equivalent to processors/cores.

I have an 8 core machine, so it gives me 8 threads. Is that the maximum? Can I get more threads than 8, if I deliberately specify more than 8?

Thanks

Answer 1

You can set as many threads as you want with:

int threads = 16;
omp_set_num_threads(threads);

http://msdn.microsoft.com/en-US/library/e16bady3%28v=vs.80%29

But be sure you are aware of the drawbacks of using more threads than there are logical cores in the system.