You can't just wave your hands about having a scheduler that magically optimizes throughput and also promptly switches to a low-latency task as soon as it becom

You can't just wave your hands about having a scheduler that magically optimizes throughput and also promptly switches to a low-latency task as soon as it becomes runnable. There isn't one, because the way of sending the low-latency task to the CPU right away costs the throughput task some of its time.