[Bdi4emc-help] do nvidia's drivers actually work with the realtime kernel?

I see that the bdi4emc wiki has a page about compiling the nvidia drivers on the realtime kernel. My experience (on other rtai-based realtime systems) has been that it's impossible to run realtime software when the nvidia drivers are being used. For instance, running the kernel latency test and glxgears at the same time gives overruns. Jeff