For example is it doing something like SCHED_FIFO or SCHED_RR from pthreads? Can the scheduling policy be changed? Can priorities be assigned to the main thread and an NSThread?
Ultimately I would like the main thread to run at 30 Hz with a CADisplayLink. In addition an NSThread would run at a lower priority. Ideally the main thread would pre-empt the NSThread to maintain the 30 Hz. I have no idea if this is possible.
