Abstract
The problems of hard real-time systems scheduling involve not only guaranteeing schedulability but also ensuring that shared data will not be corrupted. Maintaining shared data consistency has long been studied in database systems. In this paper, we discuss the key differences between database concurrency control and concurrency control for hard real-time systems and describe an approach to adapting advanced concurrency control techniques to systems requiring analytic worst-case latency guarantees. We describe an example concurrency control technique which avoids interference between queries and updaters. The versioning technique can be implemented with simple and predictable low-overhead algorithms and data structures and its application to a task set is driven by the schedulability analysis. Performance evaluation results via case studies and simulation experiments are presented that show that the versioning technique can improve pure locking protocols in a variety of settings. In particular, when tasks are computation-intensive, the improvement made by the versioning technique in reducing worst-case blocking and increasing schedulability is most significant.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.