Hard Real-Time Programming is Different

The performance requirements imposed on (hard) real-time code resp. non real-time code differ. As a consequence, conventional coding strategies as used to develop non real-time software are not suited for hard real-time code. This paper shows why non real-time coding is not suited for hard real-time systems and presents WCET-oriented program-ming as a strategy that avoids these shortcomings. It fur-ther discusses components of an infrastructure that support the WCET-oriented development of hard real-time code.