Soft Real-Time Systems: Predictability vs. Efficiency

Soft Real-Time Systems: Predictability vs. Efficiency

Author: Giorgio Buttazzo

Publisher: Springer Science & Business Media

ISBN: 0387237011

Category: Computers

Page: 292

View: 995

Get eBOOK →
Hard real-time systems are very predictable, but not sufficiently flexible to adapt to dynamic situations. This monograph provides methods for building flexible, predictable soft real-time systems, in order to optimize resources and reduce costs. It is a useful reference for developers, as well as researchers and students in Computer Science.

Soft Real-Time Systems: Predictability vs. Efficiency

Soft Real-Time Systems: Predictability vs. Efficiency

Author: Giorgio C Buttazzo

Publisher: Springer Science & Business Media

ISBN: 9780387281476

Category: Computers

Page: 275

View: 570

Get eBOOK →
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.

Memory Controllers for Mixed-Time-Criticality Systems

Memory Controllers for Mixed-Time-Criticality Systems

Author: Sven Goossens

Publisher: Springer

ISBN: 9783319320946

Category: Technology & Engineering

Page: 202

View: 226

Get eBOOK →
This book discusses the design and performance analysis of SDRAM controllers that cater to both real-time and best-effort applications, i.e. mixed-time-criticality memory controllers. The authors describe the state of the art, and then focus on an architecture template for reconfigurable memory controllers that addresses effectively the quickly evolving set of SDRAM standards, in terms of worst-case timing and power analysis, as well as implementation. A prototype implementation of the controller in SystemC and synthesizable VHDL for an FPGA development board are used as a proof of concept of the architecture template.

Handbook on Data Centers

Handbook on Data Centers

Author: Samee U. Khan

Publisher: Springer

ISBN: 9781493920921

Category: Computers

Page: 1334

View: 971

Get eBOOK →
This handbook offers a comprehensive review of the state-of-the-art research achievements in the field of data centers. Contributions from international, leading researchers and scholars offer topics in cloud computing, virtualization in data centers, energy efficient data centers, and next generation data center architecture. It also comprises current research trends in emerging areas, such as data security, data protection management, and network resource management in data centers. Specific attention is devoted to industry needs associated with the challenges faced by data centers, such as various power, cooling, floor space, and associated environmental health and safety issues, while still working to support growth without disrupting quality of service. The contributions cut across various IT data technology domains as a single source to discuss the interdependencies that need to be supported to enable a virtualized, next-generation, energy efficient, economical, and environmentally friendly data center. This book appeals to a broad spectrum of readers, including server, storage, networking, database, and applications analysts, administrators, and architects. It is intended for those seeking to gain a stronger grasp on data center networks: the fundamental protocol used by the applications and the network, the typical network technologies, and their design aspects. The Handbook of Data Centers is a leading reference on design and implementation for planning, implementing, and operating data center networks.

Fundamental Approaches to Software Engineering

Fundamental Approaches to Software Engineering

Author: Luciano Baresi

Publisher: Springer

ISBN: 9783540330943

Category: Computers

Page: 425

View: 355

Get eBOOK →
This book constitutes the refereed proceedings of the 9th International Conference on Fundamental Approaches to Software Engineering, FASE 2006, held in Vienna, Austria in March 2006 as part of ETAPS. The 27 revised full papers, two tool papers presented together with two invited papers were carefully reviewed and selected from 166 submissions. The papers are organized in topical sections.

Fast, Efficient and Predictable Memory Accesses

Fast, Efficient and Predictable Memory Accesses

Author: Lars Wehmeyer

Publisher: Springer Science & Business Media

ISBN: 9781402048227

Category: Technology & Engineering

Page: 258

View: 292

Get eBOOK →
Speed improvements in memory systems have not kept pace with the speed improvements of processors, leading to embedded systems whose performance is limited by the memory. This book presents design techniques for fast, energy-efficient and timing-predictable memory systems that achieve high performance and low energy consumption. In addition, the use of scratchpad memories significantly improves the timing predictability of the entire system, leading to tighter worst case execution time bounds.

Predictable and Runtime-Adaptable Network-On-Chip for Mixed-critical Real-time Systems

Predictable and Runtime-Adaptable Network-On-Chip for Mixed-critical Real-time Systems

Author: Sebastian Tobuschat

Publisher: Cuvillier Verlag

ISBN: 9783736989795

Category: Computers

Page: 260

View: 405

Get eBOOK →
The industry of safety-critical and dependable embedded systems calls for even cheaper, high performance platforms that allow flexibility and an efficient verification of safety and real-time requirements. In this sense, flexibility denotes the ability to (online) adapt a system to changes (e.g. changing environment, application dynamics, errors) and the reuse-ability for different use cases. To cope with the increasing complexity of interconnected functions and to reduce the cost and power consumption of the system, multicore systems are used to efficiently integrate different processing units in the same chip. Networks-on-chip (NoCs), as a modular interconnect, are used as a promising solution for such multiprocessor systems on chip (MPSoCs), due to their scalability and performance. Hence, future NoC designs must face the aforementioned challenges. For safety-critical systems, a major goal is the avoidance of hazards. For this, safety-critical systems are qualified or even certified to prove the correctness of the functioning under all possible cases. A predictable behavior of the NoC can help to ease the qualification process (e.g. formal analysis) of the system. To achieve the required predictability, designers have two classes of solutions: isolation (quality of service (QoS) mechanisms) and (formal) analysis. For mixed-criticality systems, isolation and analysis approaches must be combined to efficiently achieve the desired predictability. Isolation techniques are used to bound interference between different application classes. And analysis can then be applied verifying the real-time applications and sufficient isolation properties. Traditional NoC analysis and architecture concepts tackle only a subpart of the challenges—they focus on either performance or predictability. Existing, predictable NoCs are deemed too expensive and inflexible to host a variety of applications with opposing constraints. And state-of-the-art analyses neglect certain platform properties (e.g. they assume sufficient buffer sizes to avoid backpressure) to verify the behaviour. Together this leads to a high over-provisioning of the hardware resources as well as adverse impacts on system performance (especially for the non safety-critical applications), and on the flexibility of the system. In this work we tackle these challenges and develop a predictable and runtime-adaptable NoC architecture that efficiently integrates mixed-critical applications with opposing constraints. Additionally, we present a modeling and analysis framework for NoCs that accounts for backpressure (i.e. full buffers in network routers delaying the progress of network packets). This framework enables to evaluate the performance and reliability early at design time. Hence, the designer can assess multiple design decisions and trade-offs (such as area, voltage, reliability, performance) by using abstract models and formal approaches.

Formal Techniques in Real-Time and Fault-Tolerant Systems

Formal Techniques in Real-Time and Fault-Tolerant Systems

Author: Werner Damm

Publisher: Springer

ISBN: 9783540457398

Category: Computers

Page: 462

View: 135

Get eBOOK →
This volume contains the proceedings of FTRTFT 2002, the International S- posium on Formal Techniques in Real-Time and Fault-Tolerant Systems, held at the University of Oldenburg, Germany, 9–12 September 2002. This sym- sium was the seventh in a series of FTRTFT symposia devoted to problems and solutions in safe system design. The previous symposia took place in Warwick 1990, Nijmegen 1992, Lub ̈ eck 1994, Uppsala 1996, Lyngby 1998, and Pune 2000. Proceedings of these symposia were published as volumes 331, 571, 863, 1135, 1486, and 1926 in the LNCS series by Springer-Verlag. This year the sym- sium was co-sponsored by IFIP Working Group 2.2 on Formal Description of Programming Concepts. The symposium presented advances in the development and use of formal techniques in the design of real-time, hybrid, fault-tolerant embedded systems, covering all stages from requirements analysis to hardware and/or software - plementation. Particular emphasis was placed on UML-based development of real-time systems. Through invited presentations, links between the dependable systems and formal methods research communities were strengthened. With the increasing use of such formal techniques in industrial settings, the conference aimed at stimulating cross-fertilization between challenges in industrial usages of formal methods and advanced research. Inresponsetothecallforpapers,39submissionswerereceived.Eachsubm- sion was reviewed by four program committee members assisted by additional referees. At the end of the reviewing process, the program committee accepted 17 papers for presentation at the symposium.

Multicore Software Engineering, Performance, and Tools

Multicore Software Engineering, Performance, and Tools

Author: João M. Lourenço

Publisher: Springer

ISBN: 9783642399558

Category: Computers

Page: 111

View: 588

Get eBOOK →
This book constitutes the refereed proceedings of the International Conference on Multiscore Software Engineering, Performance, and Tools, MUSEPAT 2013, held in Saint Petersburg, Russia, in August 2013. The 9 revised papers were carefully reviewed and selected from 25 submissions. The accepted papers are organized into three main sessions and cover topics such as software engineering for multicore systems; specification, modeling and design; programing models, languages, compiler techniques and development tools; verification, testing, analysis, debugging and performance tuning, security testing; software maintenance and evolution; multicore software issues in scientific computing, embedded and mobile systems; energy-efficient computing as well as experience reports.

Applied Reconfigurable Computing

Applied Reconfigurable Computing

Author: Kentaro Sano

Publisher: Springer

ISBN: 9783319162140

Category: Computers

Page: 557

View: 922

Get eBOOK →
This book constitutes the refereed proceedings of the 11th International Symposium on Applied Reconfigurable Computing, ARC 2015, held in Bochum, Germany, in April 2015. The 23 full papers and 20 short papers presented in this volume were carefully reviewed and selected from 85 submissions. They are organized in topical headings named: architecture and modeling; tools and compilers; systems and applications; network-on-a-chip; cryptography applications; extended abstracts of posters. In addition, the book contains invited papers on funded R&D - running and completed projects and Horizon 2020 funded projects.