Thank you Andreas. I will try this way.

On Wed, Aug 17, 2016 at 11:59 PM, Andreas Kloeckner <lists@informa.tiker.net> wrote:
Marcos Paulo Rocha <markao01@gmail.com> writes:
> But multithreading will suffer the problem of GIL doesn't it ?

Well, if you're doing it right, then all of your threads will either be
waiting for some OpenCL operation to complete or waiting for IO. Neither
of those is affected by the GIL.

Andreas