How to enable Hyper-Q on Tesla K20

I want to my legacy MPI program with Hyper-Q.

To begin with, I have tried to run the simple Hyper-Q example shown below.

In the above document, Visual Profiler shows that 32 streams run cuncurrently.
But in my enviroment, only 8 streams are executed at the same time.

According to this article,
some enviroment variable settings seems to be needed.

May I have any idea to enable Hyper-Q?
How to set the enviroment variable, etc.