That isn't a patch, it's just a .config setting. Grab the 2.6.29-rt22 patches (see Download on rt.wiki.kernel.org) and set CONFIG_PREEMPT (not CONFIG_PREEMPT_RT) and enable hard and soft threaded irq's to yes. As for the exact test scenario, I don't have the details, but running dbench is fairly straightforward and will easily reproduce these results. Ingo did so with a simple 10 second run during discussions at the rt-summit.