Software Architecture in Practice
Software Architecture in Practice
Resource Partition for Real-Time Systems
RTAS '01 Proceedings of the Seventh Real-Time Technology and Applications Symposium (RTAS '01)
Periodic Resource Model for Compositional Real-Time Guarantees
RTSS '03 Proceedings of the 24th IEEE International Real-Time Systems Symposium
Compositional Real-Time Scheduling Framework
RTSS '04 Proceedings of the 25th IEEE International Real-Time Systems Symposium
The Partitioned Multiprocessor Scheduling of Deadline-Constrained Sporadic Task Systems
IEEE Transactions on Computers
Compositional Analysis Framework Using EDP Resource Models
RTSS '07 Proceedings of the 28th IEEE International Real-Time Systems Symposium
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Consider a single processor and a software system. The software system comprises components and interfaces where each component has an associated interface and each component comprises a set of constrained-deadline sporadic tasks. A scheduling algorithm (called global scheduler) determines at each instant which component is active. The active component uses another scheduling algorithm (called local scheduler) to determine which task is selected for execution on the processor. The interface of a component makes certain information about a component visible to other components; the interfaces of all components are used for schedulability analysis. We address the problem of generating an interface for a component based on the tasks inside the component. We desire to (i) incur only a small loss in schedulability analysis due to the interface and (ii) ensure that the amount of space (counted in bits) of the interface is small; this is because such an interface hides as much details of the component as possible. We present an algorithm for generating such an interface.