Running Resource and Precedence Constraints in a Hard Real-time System: A policy

This work addresses the problem of resource allocation and precedence constraints in hard real-time system with EDF policy: the concurrency control and the precedence constraints in periodic tasks. It is an improved variant of stack resource policy, which strictly bounds priority inversion using dynamic scheduling policies. The task deadlines are reduced to manage precedence constraints; a modified SRP-based resource access control approach is proposed. This paper uses resource constraints as in the SRP policy along EDF; the proposed algorithm produces a well-formed policy to handle both precedence-constrained periodic tasks and shared resource access in a hard real-time system.