Many real-time programs must sustain a fixed frame rate. In such programs your central design problem is that the program must complete certain activities during every frame interval. When there is more to do in a frame than one CPU can do, some activities must run concurrently on multiple CPUs.
Besides designing the activities themselves, you must design a way to schedule and initiate activities in sequence, once per frame, on multiple CPUs. This is what the REACT/Pro Frame Scheduler does: executes the multiple processes of your real-time program, in sequence, on one or more CPUs.