Empirical Differences between COTS Middleware Scheduling Strategies

The proportion of complex distributed real-time embedded (DRE) systems made up of commercial-off-the-shelf (COTS) hardware and software is increasing significantly in response to the difficulty and expense of building DRE systems entirely from scratch. In previous work, we showed how applying different scheduling strategies in middleware can allow COTSbased solutions to provide both assurance and optimization of real-time constraints for important classes of mission-critical DRE systems. There are few empirical studies, however, that help developers of COTS-based DRE systems to make crucial distinctions between strategies that appear similar in policy, but whose run-time effects may differ in practice. This paper provides two contributions to the study of realtime quality of service (QoS) assurance and performance in COTS-based DRE systems. First, we examine in detail two hybrid static/dynamic scheduling strategies that should behave similarly according to policy alone, but that in ...

• Type: Conference
• Year: 2002
• Where: COOPIS
• Authors: Christopher D. Gill, Fred Kuhns, Douglas C. Schmidt, Ron Cytron
• Keywords: Building Dre Systems, COOPIS 2002, COTS-based DRE Systems, DRE Systems, Information System