Benefiting of sched_autogroup_enabled on the desktop

I am running a 2.6.37 kernel with sched_autogroup_enabled set to 1. I am not certain that I am seeing the benefits of this patch since: - I am launching my applications from the desktop; - applications launched from the desktop share the same tty; - applications with the same tty do not benefit from the mentioned kernel feature. How can I select some applications which should be on a different tty from the rest?