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How to Integrate Precedence Constraints and Shared Resources in Real-Time Scheduling
December 1994 (vol. 43 no. 12)
pp. 1407-1412

Formal results for precedence constrained, real-time scheduling of unit time tasks are extended to arbitrary timed tasks with preemption. An exact characterisation of the EDF-like schedulers that can be used to transparently enforce precedence constraints among tasks is shown. These extended results are then integrated with a well-known protocol that handles real-time scheduling of tasks with shared resources, but does not consider precedence constraints. This results in schedulability formulas for task sets which allow preemption, shared resources, and precedence constraints, and a practical algorithm for many real-time uniprocessor systems.

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Index Terms:
protocols; scheduling; precedence constraints integration; shared resources; real-time scheduling; unit time tasks; EDF-like schedulers; protocol; precedence constraints; real-time uniprocessor systems.
M. Spuri, J.A. Stankovic, "How to Integrate Precedence Constraints and Shared Resources in Real-Time Scheduling," IEEE Transactions on Computers, vol. 43, no. 12, pp. 1407-1412, Dec. 1994, doi:10.1109/12.338100
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