International audienceWe are interested in a real-time computing system that is powered through a rechargeable battery. In this context, two constraints need to be addressed: energy and deadlines. Classical task scheduling, in particular Earliest Deadline First, only accounts for timing parameters of the tasks and conse- quently is not suitable when considering energy constraints. We show here how to modify Earliest Deadline so as to account for the properties of the energy source, capacity of the energy storage as well as energy consumption of the tasks. We present an exact feasibility test that decides for periodic task sets, whether they can be scheduled without deadline violations. To this end, we introduce the concepts of energy demand and slack energy
