A metrics-driven approach for utilizing concurrency in object-oriented real-time systems

Welch, Lonnie R.

doi:10.1145/227986.227998

Cited by 7 publications

(1 citation statement)

References 13 publications

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“…Welch 22 describes techniques for computing inter-object concurrency metrics, and how they are used to guide the mapping of objects onto processors. Bhatt 23 presents the Parallel Scaleable Design Toolset to graphically specify parallelism across collections of objects and within objects, and the synchronization of data and control flows.…”

Section: Listing 1 the Process Function Patternmentioning

confidence: 99%

A practical approach to the design of concurrency in object-oriented systems

Awad¹,

Ziegler

1997

Softw: Pract. Exper.

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Object-oriented software development methods deal with concurrency according to either the implicit concurrency model or the explicit concurrency model. In the implicit model, the objects themselves have concurrent execution capabilities whereas in the explicit model, objects are encapsulated inside processes, the latter providing concurrent execution capabilities. Both models have their advantages and disadvantages. In this paper, we propose applying the implicit model only while conducting object-oriented analysis and then switching over to the explicit model in the design phase. The implicit model naturally fits the analysis phase because the resulting models of the software system will be based on objects-the important concepts of the application-not the issues of how concurrency is implemented. A switch over to the explicit model in the design phase achieves smooth integration with already existing software consisting of processes-which is the main constraint in many industrial applications. This paper presents in detail a systematic solution for the switch over between the concurrency models that applies for soft real-time systems and demonstrates it by a simplified example from a real telecommunication project. Any objectoriented method not yet dealing with concurrency issues can easily integrate the solution.

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Section: Listing 1 the Process Function Patternmentioning

confidence: 99%

A practical approach to the design of concurrency in object-oriented systems

Awad¹,

Ziegler

1997

Softw: Pract. Exper.

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SESAG: an object‐oriented application framework for real‐time systems

Hsiung

Lee

et al. 2005

Softw Pract Exp

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Advancements in hardware and software technologies have made possible the design of real‐time systems and applications where stringent timing constraints are imposed on critical tasks. The design of such systems is more complex than that of temporally unrestricted systems because system correctness depends on the satisfaction of functional as well as temporal requirements. To aid users in correctly and efficiently designing systems, object‐oriented frameworks provide a useful environment for significant reuse and reduction in design effort. In contrast to other application domains, there has been relatively little work on an application framework for the design of real‐time systems. Facing the growing need for real‐time applications, we propose a novel application framework called SESAG, which consists of five components, namely Specifier, Extractor, Scheduler, Allocator, and Generator. Within SESAG, several design patterns are proposed and used for the development of real‐time applications. A new evaluation metric called relative design effort is proposed for evaluating SESAG. Experiences in using SESAG show a significant increase in design productivity through design reuse and a significant decrease in design time and effort. Two complex application examples have been developed using SESAG and evaluated using the new evaluation metric. The examples demonstrate relative design efforts of at most 18% of the design efforts required by conventional methods. Copyright © 2005 John Wiley & Sons, Ltd.

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VERTAF: an object-oriented application framework for embedded real-time systems

Hsiung

Lee²,

See³

et al.

Proceedings Fifth IEEE International Symposium on Object-Oriented Real-Time Distributed Computing. ISIRC 2002

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Embedded real-time applications are often built from scratch on a trial-and-error basis, which leads to sub-optimal designs with latent errors that are not detectable in early stages of use or deployment and often incurs prolonged time-to-market. A new application framework called Verifiable Embedded Real-Time Application Framework (VERTAF) is proposed for embedded real-time application development, with the aim of reducing design errors and increasing design productivity. VERTAF is an integration of three technologies, namely object-oriented technology, software component technology, and formal verification technology.VERTAF consists of five software components: Implanter, Modeler, Scheduler, Verifier, and Generator. Experiences of using VERTAF show a significant increase in design productivity through design reuse, and a significant decrease in design time and effort through design verification. An example shows a relatively low design effort on the part of the designer using VERTAF.

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A metrics-driven approach for utilizing concurrency in object-oriented real-time systems

Cited by 7 publications

References 13 publications

A practical approach to the design of concurrency in object-oriented systems

A practical approach to the design of concurrency in object-oriented systems

SESAG: an object‐oriented application framework for real‐time systems

VERTAF: an object-oriented application framework for embedded real-time systems

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