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An Ada 2005 Technology for Distributed and Real-Time Component-based Applications
"... Abstract: The concept of interface in Ada 2005 significantly facilitates its usage ..."
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Abstract: The concept of interface in Ada 2005 significantly facilitates its usage
Real-Time Distribution Middleware from the Ada Perspective 1
"... Abstract. Standards for distribution middleware sometimes impose restrictions and often allow the implementations to decide on aspects that are fundamental to the correct and efficient behaviour of the applications using them, especially when these applications have real-time requirements. This work ..."
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Abstract. Standards for distribution middleware sometimes impose restrictions and often allow the implementations to decide on aspects that are fundamental to the correct and efficient behaviour of the applications using them, especially when these applications have real-time requirements. This work presents a study of two standard approaches for distribution middleware that can be used from Ada applications: RT-CORBA, and the Distributed Systems Annex (DSA) of Ada. The study focuses on the problems associated with the real-time behaviour of some implementations of these approaches, and on possible solutions that can be derived from our experience with Ada implementations. Moreover, the paper considers the problem of integration of the distribution middleware with a new generation of scheduling mechanisms based on contracts. Key words: distribution middleware, real-time, communications, RT-CORBA, Ada DSA, performance. 1
Schedulability Analysis of AR-TP, a Ravenscar Compliant Communication Protocol for High-Integrity Distributed Systems ∗
"... A new token-passing algorithm called AR-TP for avoid-ing the non-determinism of some networking technologies is presented. This protocol allows the schedulability analysis of the network, enabling the use of standard Ethernet hard-ware for Hard Real-Time behavior while adding conges-tion management. ..."
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A new token-passing algorithm called AR-TP for avoid-ing the non-determinism of some networking technologies is presented. This protocol allows the schedulability analysis of the network, enabling the use of standard Ethernet hard-ware for Hard Real-Time behavior while adding conges-tion management. It is specially designed for High-Integrity Distributed Hard Real-Time Systems, being fully compliant with the Ravenscar Profile.
