Generalizing fixed-priority scheduling for better schedulability in mixed-criticality systems

a r t i c l e i n f o a b s t r a c t Keywords: Real-time systems Mixed-criticality Fixed-priority scheduling Schedulability analysis Priority assignment algorithm The design of mixed-criticality systems is often subject to mandatory certification and has been drawing considerable attention over the past few years. This letter studies fixed-priority scheduling of mixed-criticality systems on a uniprocessor platform but in a more general way, using different priority orderings in different execution phases and considering them collectively. Then a sufficient response-time analysis is developed and a new priority assignment scheme is proposed. This generalized approach has potential in better schedulability performance for mixed-criticality systems.