Soft Real Time Systems Predictability vs Efficiency

Hard real-time systems are very predictable, but not sufficiently flexible to adapt to dynamic situations.

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Author: Giorgio C Buttazzo

Publisher: Springer Science & Business Media

ISBN: 9780387281476

Category: Computers

Page: 275

View: 418

Hard real-time systems are very predictable, but not sufficiently flexible to adapt to dynamic situations. They are built under pessimistic assumptions to cope with worst-case scenarios, so they often waste resources. Soft real-time systems are built to reduce resource consumption, tolerate overloads and adapt to system changes. They are also more suited to novel applications of real-time technology, such as multimedia systems, monitoring apparatuses, telecommunication networks, mobile robotics, virtual reality, and interactive computer games. This unique monograph provides concrete methods for building flexible, predictable soft real-time systems, in order to optimize resources and reduce costs. It is an invaluable reference for developers, as well as researchers and students in Computer Science.

Time Predictability of a Computer System

This research investigates the influences on the running time of an application.

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Author: Wouter van der Put

Publisher: LAP Lambert Academic Publishing

ISBN: 3838385810

Category:

Page: 64

View: 936

This research investigates the influences on the running time of an application. These influences are separated into five levels: processor core, memory hierarchy, system architecture, operating system and application. The influences on the running time are described and formulated in abstract formulas using literature studies in combination with results from experiments. These tools give insight into a complete computer system which can be used to upgrade current systems and/or design future (hard) real-time embedded systems.

Software Technologies for Embedded and Ubiquitous Systems

For the WCET-predictability it is natural to define the accuracy based on the obtained upper bound UBtm of the execution time, while for the ...

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Author: Sang Lyul Min

Publisher: Springer Science & Business Media

ISBN: 9783642162558

Category: Computers

Page: 253

View: 703

The 8th IFIP Workshop on Software Technologies for Embedded and Ubiq- tous Systems (SEUS 2010) in Waidhofen/Ybbs, Austria, October 13-15, 2010, succeeded the seven previous workshops in Newport Beach, USA (2009); Capri, Italy (2008); Santorini, Greece (2007); Gyeongju, Korea (2006); Seattle, USA (2005); Vienna, Austria (2004); and Hokodate, Japan (2003); installing SEUS as a successfully established workshop in the ?eld of embedded and ubiquitous systems. SEUS 2010 continued the tradition of fostering cross-community scienti?c excellence and establishing strong links between research and industry. SEUS 2010 provided a forum where researchers and practitioners with substantial - periences and serious interests in advancing the state of the art and the state of practice in the ?eld of embedded and ubiquitous computing systems gathered with the goal of fostering new ideas, collaborations, and technologies. The c- tributions in this volume present advances in integrating the ?elds of embedded computing and ubiquitous systems. The call for papers attracted 30 submissions from all around the world. Each submission was assigned to at least four members of the Program Committee for review. The Program Committee decided to accept 21 papers, which were arranged in eight sessions. The accepted papers are from Austria, Denmark, France, Germany, Italy, Japan, Korea, Portugal, Taiwan, UK, and USA. Two keynotes complemented the strong technical program.

Constructing Predictable Real Time Systems

The on-board computer system consists of three redundant primary digital computers backed up by three redundant analogue computers.

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Author: Alexander D. Stoyenko

Publisher: Springer Science & Business Media

ISBN: 9781461540328

Category: Computers

Page: 311

View: 788

High Performance and Time Predictable Embedded Computing

High-Performance and Time-Predictable Embedded Computing presents recent advances in software architecture and tools to support such complex systems, ...

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Author: Pinho, Luis Miguel

Publisher: River Publishers

ISBN: 9788793609693

Category: Computers

Page: 234

View: 559

Nowadays, the prevalence of computing systems in our lives is so ubiquitous that we live in a cyber-physical world dominated by computer systems, from pacemakers to cars and airplanes. These systems demand for more computational performance to process large amounts of data from multiple data sources with guaranteed processing times. Actuating outside of the required timing bounds may cause the failure of the system, being vital for systems like planes, cars, business monitoring, e-trading, etc. High-Performance and Time-Predictable Embedded Computing presents recent advances in software architecture and tools to support such complex systems, enabling the design of embedded computing devices which are able to deliver high-performance whilst guaranteeing the application required timing bounds. Technical topics discussed in the book include: Parallel embedded platformsProgramming modelsMapping and scheduling of parallel computationsTiming and schedulability analysisRuntimes and operating systems The work reflected in this book was done in the scope of the European project P‑SOCRATES, funded under the FP7 framework program of the European Commission. High-performance and time-predictable embedded computing is ideal for personnel in computer/communication/embedded industries as well as academic staff and master/research students in computer science, embedded systems, cyber-physical systems and internet-of-things.

From Model Driven Design to Resource Management for Distributed Embedded Systems

A TIME-PREDICTABLE APPLICATION COMPUTER The timing of the actions performed by a computer system depends on both, the software running on the computer and ...

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Author: Bernd Kleinjohann

Publisher: Springer

ISBN: 9780387393629

Category: Computers

Page: 274

View: 875

From Model-Driven Design to Resource Management for Distributed Embedded Systems presents 16 original contributions and 12 invited papers presented at the Working Conference on Distributed and Parallel Embedded Systems - DIPES 2006, sponsored by the International Federation for Information Processing - IFIP. Coverage includes model-driven design, testing and evolution of embedded systems, timing analysis and predictability, scheduling, allocation, communication and resource management in distributed real-time systems.

Hard Real Time Computing Systems

This updated edition offers an indispensable exposition on real-time computing, with particular emphasis on predictable scheduling algorithms.

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Author: Giorgio C Buttazzo

Publisher: Springer

ISBN: 1461430194

Category: Computers

Page: 524

View: 292

This updated edition offers an indispensable exposition on real-time computing, with particular emphasis on predictable scheduling algorithms. It introduces the fundamental concepts of real-time computing, demonstrates the most significant results in the field, and provides the essential methodologies for designing predictable computing systems used to support time-critical control applications. Along with an in-depth guide to the available approaches for the implementation and analysis of real-time applications, this revised edition contains a close examination of recent developments in real-time systems, including limited preemptive scheduling, resource reservation techniques, overload handling algorithms, and adaptive scheduling techniques. This volume serves as a fundamental advanced-level textbook. Each chapter provides basic concepts, which are followed by algorithms, illustrated with concrete examples, figures and tables. Exercises and solutions are provided to enhance self-study, making this an excellent reference for those interested in real-time computing for designing and/or developing predictable control applications.

Real time Software Techniques

This requirement points to the need for response time predictability . A real - time
computer system must be able to guarantee that it can respond to an external
stimulus within a specified maximum time interval . The nature of the equipment ...

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Author: Walter S. Heath

Publisher: Van Nostrand Reinhold Computer

ISBN: UOM:39015018989148

Category: Computers

Page: 249

View: 742

Software Technologies for Embedded and Ubiquitous Systems

The connector unit provides the following services in support of the time-predictable software architecture of the application computer.

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Author: Uwe Brinkschulte

Publisher: Springer Science & Business Media

ISBN: 9783540877844

Category: Business & Economics

Page: 432

View: 335

This book includes selected papers of the 6th IFIP WG 10.2 International Workshop on Software Technologies for Future Embedded and Ubiquitous Systems, SEUS 2008, held on Capri, Italy, in October 2008. The 38 revised full papers presented were carefully reviewed and selected. The papers are organized in topical sections on model-driven development; middleware; real time; quality of service and performance; applications; pervasive and mobile systems: wireless embedded systems; synthesis, verification and protection.

Time Predictable Architectures

One of the two main important parts of a computer system is the memory. It is frequently accessed by the processor to fetch instructions and to read and ...

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Author: Christine Rochange

Publisher: John Wiley & Sons

ISBN: 9781118790267

Category: Computers

Page: 192

View: 141

Building computers that can be used to design embedded real-time systems is the subject of this title. Real-time embedded software requires increasingly higher performances. The authors therefore consider processors that implement advanced mechanisms such as pipelining, out-of-order execution, branch prediction, cache memories, multi-threading, multicorearchitectures, etc. The authors of this book investigate the timepredictability of such schemes.

Computer Aided and Integrated Manufacturing Systems

Basic Properties of Embedded Real - Time Systems Real - time operation is the operating mode of a computer system in which programs for the processing of ...

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Author: Cornelius T. Leondes

Publisher: World Scientific

ISBN: 9812796819

Category: Technology & Engineering

Page: 256

View: 649

This is an invaluable five-volume reference on the very broad and highly significant subject of computer aided and integrated manufacturing systems. It is a set of distinctly titled and well-harmonized volumes by leading experts on the international scene. The techniques and technologies used in computer aided and integrated manufacturing systems have produced, and will no doubt continue to produce, major annual improvements in productivity, which is defined as the goods and services produced from each hour of work. This publication deals particularly with more effective utilization of labor and capital, especially information technology systems. Together the five volumes treat comprehensively the major techniques and technologies that are involved. Contents: .: Techniques and Applications of Production Planning in Electronics Manufacturing Systems (J Smed et al.); Economic Optimization of Machining Operations in Computer Aided Manufacturing Systems (J Wang); Computer Techniques and Applications for Real-Time Embedded Control in Mechatronic Systems (M Colnaric & W A Halang); and other articles. Readership: Graduate students, academics, researchers, and industrialists in computer engineering, industrial engineering, mechanical engineering, systems engineering, artificial intelligence and operations management

Computer Systems Science Engineering

An object of type SYSTEM . TASK _ CLASS can refer to any task in the system .
REFERENCES Stankovic , J A and Ramamritham , K What is predictability for
real - time systems ? ' , Real - Time Syst . , Vol 2 No 4 ( 1990 ) pp 247 - 254
Chung ...

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Author:

Publisher:

ISBN: UOM:39015031265492

Category: Computer engineering

Page:

View: 937

Computer Aided and Integrated Manufacturing Systems

Basic Properties of Embedded Real-Time Systems Real-time operation is the operating mode of a computer system in which programs for the processing of data ...

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Author: Cornelius T Leondes

Publisher: World Scientific

ISBN: 9789814486255

Category:

Page: 256

View: 327

This is an invaluable five-volume reference on the very broad and highly significant subject of computer aided and integrated manufacturing systems. It is a set of distinctly titled and well-harmonized volumes by leading experts on the international scene. The techniques and technologies used in computer aided and integrated manufacturing systems have produced, and will no doubt continue to produce, major annual improvements in productivity, which is defined as the goods and services produced from each hour of work. This publication deals particularly with more effective utilization of labor and capital, especially information technology systems. Together the five volumes treat comprehensively the major techniques and technologies that are involved.

Distributed Computer Control Systems 1991

Towards Distributed Real-Time Systems with Predictable Timing Properties H. Kopetz, ... in a distributed computer system with known timing characteristics.

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Author: H. Kopetz

Publisher: Elsevier

ISBN: 9781483299464

Category: Technology & Engineering

Page: 157

View: 386

Distributed computer control is at the intersection between control engineering and computer science. Containing 22 papers, this book provides an up-to-date reference source of important issues in the design and implementation of distributed real-time computer systems.

Software Engineering and Computer Systems Part II

3) The predictability has the property required to meet the timing requirements. Predictability requires that information about the system is known.

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Author: Jasni Mohamad Zain

Publisher: Springer

ISBN: 9783642221910

Category: Computers

Page: 744

View: 250

This Three-Volume-Set constitutes the refereed proceedings of the Second International Conference on Software Engineering and Computer Systems, ICSECS 2011, held in Kuantan, Malaysia, in June 2011. The 190 revised full papers presented together with invited papers in the three volumes were carefully reviewed and selected from numerous submissions. The papers are organized in topical sections on software engineering; network; bioinformatics and e-health; biometrics technologies; Web engineering; neural network; parallel and distributed e-learning; ontology; image processing; information and data management; engineering; software security; graphics and multimedia; databases; algorithms; signal processing; software design/testing; e- technology; ad hoc networks; social networks; software process modeling; miscellaneous topics in software engineering and computer systems.

Real time Communication Protocols for Multi hop Ad hoc Networks

Real-time computer systems exhibit specific requirements regarding performance, reliability ... their occurrence in time has to be sufficiently predictable.

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Author: Reinhard Gotzhein

Publisher: Springer Nature

ISBN: 9783030333195

Category: Computers

Page: 275

View: 259

This book focuses on core functionalities for wireless real-time multi-hop networking with TDMA (time-division multiple access) and their integration into a flexible, versatile, fully operational, self-contained communication system. The use of wireless real-time communication technologies for the flexible networking of sensors, actuators, and controllers is a crucial building block for future production and control systems. WirelessHART and ISA 100.11a, two technologies that have been developed predominantly for industrial use, are currently available. However, a closer analysis of these approaches reveals certain deficits. Current research on wireless real-time communication systems shows potential to remove these limitations, resulting in flexible, versatile, and robust solutions that can be implemented on today’s low-cost and resource-constrained hardware platforms. Unlike other books on wireless communication, this book presents protocols located on MAC layer and above, and build on the physical (PHY) layer of standard wireless communication technologies.

Introduction to PCM Telemetering Systems

Real-Time Systems A real time computer system is often defined as “a system ... to respond in predictable and time-bounded ways to these interrupt requests.

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Author: Stephen Horan

Publisher: CRC Press

ISBN: 9781420040883

Category: Technology & Engineering

Page: 448

View: 616

Telemetering systems and applications have moved far beyond the space flight telemetry most people have heard of to cutting-edge uses across a broad range of disciplines, including industry, medicine, and meteorology. To fully understand and participate in the acquisition of data this technology makes possible, scientists in these fields along with engineers new to telemetering require some background in the concepts, hardware, and software that makes the technology so valuable. Introduction to PCM Telemetering Systems, Second Edition summarizes the techniques and terminology used in sending data and control information between users and the instruments that collect and process the data. It gives an overall systems introduction to the relevant topics in three primary areas: system interfaces; data transport, timing, and synchronization; and data transmission techniques. The topics addressed include sensor characteristics, user interface design, data filtering, data framing, statistical analysis, telemetry standards, time code standards, modulation techniques, and radio propagation. To reinforce understanding, each chapter includes exercises. Rather than focusing on design specifics, which can change so rapidly with evolving technologies, the author centers his discussions on concepts and standards. This edition incorporates the latest standards, LabVIEW-based examples of telemetry and command processing, and simulations using multiSim and Commsim.

Responsive Computer Systems Steps Toward Fault Tolerant Real Time Systems

Our scenario assumes a run - time platform able to guarantee some basic run -
time predictability and protection : it must be able to stipulate and honor contracts
for timely execution . Global system - wide management and optimisation are ...

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Author: Donald Fussell

Publisher: Springer

ISBN: UOM:39015037475707

Category: Computers

Page: 268

View: 210

Responsive Computer Systems: Steps Towards Fault-Tolerant Real-Time Systems provides an extensive treatment of the most important issues in the design of modern Responsive Computer Systems. It lays the groundwork for a more comprehensive model that allows critical design issues to be treated in ways that more traditional disciplines of computer research have inhibited. It breaks important ground in the development of a fruitful, modern perspective on computer systems as they are currently developing and as they may be expected to develop over the next decade. Audience: An interesting and important road map to some of the most important emerging issues in computing, suitable as a secondary text for graduate level courses on responsive computer systems and as a reference for industrial practitioners.

Real time Systems

The reactions to be carried out by the computer , however , must be precisely planned and fully predictable . This holds particularly in the case of the ...

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Author: Wolfgang A. Halang

Publisher: World Scientific

ISBN: 9810210647

Category: Technology & Engineering

Page: 353

View: 114

This book represents the first comprehensive text in English on real-time and embedded computing systems. It is addressed to engineering students of universities and polytechnics as well as to practitioners and provides the knowledge required for the implementation of industrial computerized process control and manufacturing automation systems. The book avoids mathematical treatment and supports the relevance of the concepts introduced by practical examples and case studies. Special emphasis is placed on a sound conceptual basis and on methodologies and tools for the development of high quality control software, since software dependability has been identified as the major problem area of computerized process automation.

Techniques for Building Timing Predictable Embedded Systems

6:1–6:10 J. Staschulat, R. Ernst, Scalable precision cache analysis for real-time software, in ACM Transactions on Embedded Computing Systems, vol. 6, no.

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Author: Nan Guan

Publisher: Springer

ISBN: 9783319271989

Category: Technology & Engineering

Page: 235

View: 934

This book describes state-of-the-art techniques for designing real-time computer systems. The author shows how to estimate precisely the effect of cache architecture on the execution time of a program, how to dispatch workload on multicore processors to optimize resources, while meeting deadline constraints, and how to use closed-form mathematical approaches to characterize highly variable workloads and their interaction in a networked environment. Readers will learn how to deal with unpredictable timing behaviors of computer systems on different levels of system granularity and abstraction.