Download or read book Real Time Applications with Stochastic Task Execution Times written by Sorin Manolache and published by Springer Science & Business Media. This book was released on 2007-03-20 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents three approaches to the analysis of the deadline miss ratio of applications with stochastic task execution times. Each best fits a different context: an exact one efficiently applicable to monoprocessor systems; an approximate one, which allows for designer-controlled trade-off between analysis accuracy and analysis speed; and one less accurate but sufficiently fast in order to be placed inside optimization loops.
Download or read book Generalizing List Scheduling for Stochastic Soft Real time Parallel Applications written by Yoginder Singh Dandass and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced architecture processors provide features such as caches and branch prediction that result in improved, but variable, execution time of software. Hard real-time systems require tasks to complete within timing constraints. Consequently, hard real-time systems are typically designed conservatively through the use of tasks' worst-case execution times (WCET) in order to compute deterministic schedules that guarantee task's execution within giving time constraints. This use of pessimistic execution time assumptions provides real-time guarantees at the cost of decreased performance and resource utilization. In soft real-time systems, however, meeting deadlines is not an absolute requirement (i.e., missing a few deadlines does not severely degrade system performance or cause catastrophic failure). In such systems, a guaranteed minimum probability of completing by the deadline is sufficient. Therefore, there is considerable latitude in such systems for improving resource utilization and performance as compared with hard real-time systems, through the use of more realistic execution time assumptions. Given probability distribution functions (PDFs) representing tasks' execution time requirements, and tasks' communication and precedence requirements, represented as a directed acyclic graph (DAG), this dissertation proposes and investigates algorithms for constructing non-preemptive stochastic schedules. New PDF manipulation operators developed in this dissertation are used to compute tasks' start and completion time PDFs during schedule construction. PDFs of the schedules' completion times are also computed and used to systematically trade the probability of meeting end-to-end deadlines for schedule length and jitter in task completion times. Because of the NP-hard nature of the non-preemptive DAG scheduling problem, the new stochastic scheduling algorithms extend traditional heuristic list scheduling and genetic list scheduling algorithms for DAGs by using PDFs instead of fixed time values for task execution requirements. The stochastic scheduling algorithms also account for delays caused by communication contention, typically ignored in prior DAG scheduling research. Extensive experimental results are used to demonstrate the efficacy of the new algorithms in constructing stochastic schedules. Results also show that through the use of the techniques developed in this dissertation, the probability of meeting deadlines can be usefully traded for performance and jitter in soft real-time systems.
Download or read book Schedulability Analysis of Real time Systems with Stochastic Task Execution Times written by Sorin Manolache and published by . This book was released on 2002 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Real Time and Embedded Computing Systems and Applications written by Jing Chen and published by Springer Science & Business Media. This book was released on 2004-05-21 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the thoroughly refereed post-proceedings of the 9th International Conference on Real-Time and Embedded Systems and Applications, RTCSA 2003, held in Tainan, Taiwan, in February 2003. The 28 revised full papers and 9 revised short papers presented were carefully reviewed and selected for inclusion in the book. The papers are organized in topical sections on scheduling, networking and communication, embedded systems and environments, pervasive and ubiquitous computing, systems and architectures, resource management, file systems and databases, performance analysis, and tools and development.
Download or read book Computer Performance Engineering written by Rena Bakhshi and published by Springer. This book was released on 2018-10-15 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 15th European Workshop on Computer Performance Engineering, EPEW 2018, held in Paris, France, in October 2018. The 17 papers presented together with the abstracts of two invited talks in this volume were carefully reviewed and selected from 27 submissions. The papers presented at the workshop reflect the diversity of modern performance engineering, with topics ranging from advances in performanceengineering realm, including, dependability and security modeling, performance oriented model verification and testing, hardware and software systems case-studies, applications/extensions of queuing theory and network design
Download or read book Languages Compilers and Tools for Embedded Systems written by Jack Davidson and published by Springer. This book was released on 2003-06-29 with total page 231 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the proceedings of the ACM SIGPLAN Workshop on L- guages, Compilers, and Tools for Embedded Systems (LCTES 2000), held June 18, 2000, in Vancouver, Canada. Embedded systems have developed consid- ably in the past decade and we expect this technology to become even more important in computer science and engineering in the new millennium. Interest in the workshop has been con rmed by the submission of papers from all over the world. There were 43 submissions representing more than 14 countries. Each submitted paper was reviewed by at least three members of the program committee. The expert opinions of many outside reviewers were in- luable in making the selections and ensuring the high quality of the program, for which, we express our sincere gratitude. The nal program features one invited talk, twelve presentations, and ve poster presentations, which re?ect recent - vances in formal systems, compilers, tools, and hardware for embedded systems. We owe a great deal of thanks to the authors, reviewers, and the members of the program committee for making the workshop a success. Special thanks to Jim Larus, the General Chair of PLDI 2000 and Julie Goetz of ACM for all their help and support. Thanks should also be given to Sung-Soo Lim at Seoul National University for his help in coordinating the paper submission and review process. We also thank Professor Gaetano Borriello of the University of Washington for his invited talk on Chinook, a hardware-software co-synthesis CAD tool for embedded systems.
Download or read book Software Technologies for Embedded and Ubiquitous Systems written by Roman Obermaisser and published by Springer. This book was released on 2007-09-17 with total page 575 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the thoroughly refereed post-proceedings of the 5th IFIP WG 10.2 International Workshop on Software Technologies for Future Embedded and Ubiquitous Systems, SEUS 2007, held in conjunction with ISORC 2007, the 10th IEEE International Symposium on Object/component/service-oriented Real-time Distributed Computing. Coverage includes ubiquitous computing frameworks, validation of embedded and ubiquitous systems, and ubiquitous computing applications.
Download or read book Embedded and Real Time System Development A Software Engineering Perspective written by Mohammad Ayoub Khan and published by Springer. This book was released on 2013-11-19 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nowadays embedded and real-time systems contain complex software. The complexity of embedded systems is increasing, and the amount and variety of software in the embedded products are growing. This creates a big challenge for embedded and real-time software development processes and there is a need to develop separate metrics and benchmarks. “Embedded and Real Time System Development: A Software Engineering Perspective: Concepts, Methods and Principles” presents practical as well as conceptual knowledge of the latest tools, techniques and methodologies of embedded software engineering and real-time systems. Each chapter includes an in-depth investigation regarding the actual or potential role of software engineering tools in the context of the embedded system and real-time system. The book presents state-of-the art and future perspectives with industry experts, researchers, and academicians sharing ideas and experiences including surrounding frontier technologies, breakthroughs, innovative solutions and applications. The book is organized into four parts “Embedded Software Development Process”, “Design Patterns and Development Methodology”, “Modelling Framework” and “Performance Analysis, Power Management and Deployment” with altogether 12 chapters. The book is aiming at (i) undergraduate students and postgraduate students conducting research in the areas of embedded software engineering and real-time systems; (ii) researchers at universities and other institutions working in these fields; and (iii) practitioners in the R&D departments of embedded system. It can be used as an advanced reference for a course taught at the postgraduate level in embedded software engineering and real-time systems.
Download or read book Embedded Systems Design written by Bruno Bouyssounouse and published by Springer Science & Business Media. This book was released on 2005-03-30 with total page 507 pages. Available in PDF, EPUB and Kindle. Book excerpt: This extensive and increasing use of embedded systems and their integration in everyday products mark a significant evolution in information science and technology. Nowadays embedded systems design is subject to seamless integration with the physical and electronic environment while meeting requirements like reliability, availability, robustness, power consumption, cost, and deadlines. Thus, embedded systems design raises challenging problems for research, such as security, reliable and mobile services, large-scale heterogeneous distributed systems, adaptation, component-based development, and validation and tool-based certification. This book results from the ARTIST FP5 project funded by the European Commision. By integration 28 leading European research institutions with many top researchers in the area, this book assesses and strategically advances the state of the art in embedded systems. The coherently written monograph-like book is a valuable source of reference for researchers active in the field and serves well as an introduction to scientists and professionals interested in learning about embedded systems design.
Download or read book Multimedia Multiprocessor Systems written by Akash Kumar and published by Springer Science & Business Media. This book was released on 2010-09-11 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern multimedia systems are becoming increasingly multiprocessor and heterogeneous to match the high performance and low power demands placed on them by the large number of applications. The concurrent execution of these applications causes interference and unpredictability in the performance of these systems. In Multimedia Multiprocessor Systems, an analysis mechanism is presented to accurately predict the performance of multiple applications executing concurrently. With high consumer demand the time-to-market has become significantly lower. To cope with the complexity in designing such systems, an automated design-flow is needed that can generate systems from a high-level architectural description such that they are not error-prone and consume less time. Such a design methodology is presented for multiple use-cases -- combinations of active applications. A resource manager is also presented to manage the various resources in the system, and to achieve the goals of performance prediction, admission control and budget enforcement.
Download or read book Proceedings written by and published by . This book was released on 2005 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wireless Algorithms Systems and Applications written by Xinbing Wang and published by Springer. This book was released on 2012-08-10 with total page 762 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 7th International Conference on Wireless Algorithms, Systems, and Applications, WASA 2012, held in Yellow Mountains, China, in August 2012. The 24 revised full papers presented together with 32 invited papers were carefully reviewed and selected from 116 submissions. The papers cover a wide range of topics such as cognitive radio networks, cyber-physical network systems, mobile handset networking systems, underwater and radar wireless networks, and wireless and mobile security.
Download or read book Systems Aspects in Organic and Pervasive Computing ARCS 2005 written by Michael Beigl and published by Springer. This book was released on 2005-03-01 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 18th International Conference on Architecture of Computing Systems, ARCS 2005, held in Innsbruck, Austria in March 2005. The 18 revised full papers presented were carefully reviewed and selected from 52 submissions. The papers are organized in topical sections on adaptation, power consumption, and scheduling; adaptation and agents; adaptation and services; application of adaptable systems; and pervasive computing and communication.
Download or read book Handbook of Real Time Computing written by Yu-Chu Tian and published by Springer Nature. This book was released on 2022-08-08 with total page 1511 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this handbook is to summarize the recent rapidly developed real-time computing technologies, from theories to applications. This handbook benefits the readers as a full and quick technical reference with a high-level historic review of technology, detailed technical descriptions and the latest practical applications. In general, the handbook is divided into three main parts (subjected to be modified): theory, design, and application covering different but not limited to the following topics: - Real-time operating systems - Real-time scheduling - Timing analysis - Programming languages and run-time systems - Middleware systems - Design and analysis tools - Real-time aspects of wireless sensor networks - Energy aware real-time methods
Download or read book Computational Intelligence in Digital and Network Designs and Applications written by Mourad Fakhfakh and published by Springer. This book was released on 2015-07-14 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explains the application of recent advances in computational intelligence – algorithms, design methodologies, and synthesis techniques – to the design of integrated circuits and systems. It highlights new biasing and sizing approaches and optimization techniques and their application to the design of high-performance digital, VLSI, radio-frequency, and mixed-signal circuits and systems. This second of two related volumes addresses digital and network designs and applications, with 12 chapters grouped into parts on digital circuit design, network optimization, and applications. It will be of interest to practitioners and researchers in computer science and electronics engineering engaged with the design of electronic circuits.
Download or read book Stochastic Algorithms Foundations and Applications written by O. B. Lupanov and published by Springer Science & Business Media. This book was released on 2005-10-13 with total page 247 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the Third International Symposium on Stochastic Algorithms: Foundations and Applications, SAGA 2005, held in Moscow, Russia in October 2005. The 14 revised full papers presented together with 5 invited papers were carefully reviewed and selected for inclusion in the book. The contributed papers included in this volume cover both theoretical as well as applied aspects of stochastic computations whith a special focus on new algorithmic ideas involving stochastic decisions and the design and evaluation of stochastic algorithms within realistic scenarios.
Download or read book Formal Verification of Tree Ensembles in Safety Critical Applications written by John Törnblom and published by Linköping University Electronic Press. This book was released on 2020-10-28 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the presence of data and computational resources, machine learning can be used to synthesize software automatically. For example, machines are now capable of learning complicated pattern recognition tasks and sophisticated decision policies, two key capabilities in autonomous cyber-physical systems. Unfortunately, humans find software synthesized by machine learning algorithms difficult to interpret, which currently limits their use in safety-critical applications such as medical diagnosis and avionic systems. In particular, successful deployments of safety-critical systems mandate the execution of rigorous verification activities, which often rely on human insights, e.g., to identify scenarios in which the system shall be tested. A natural pathway towards a viable verification strategy for such systems is to leverage formal verification techniques, which, in the presence of a formal specification, can provide definitive guarantees with little human intervention. However, formal verification suffers from scalability issues with respect to system complexity. In this thesis, we investigate the limits of current formal verification techniques when applied to a class of machine learning models called tree ensembles, and identify model-specific characteristics that can be exploited to improve the performance of verification algorithms when applied specifically to tree ensembles. To this end, we develop two formal verification techniques specifically for tree ensembles, one fast and conservative technique, and one exact but more computationally demanding. We then combine these two techniques into an abstraction-refinement approach, that we implement in a tool called VoTE (Verifier of Tree Ensembles). Using a couple of case studies, we recognize that sets of inputs that lead to the same system behavior can be captured precisely as hyperrectangles, which enables tractable enumeration of input-output mappings when the input dimension is low. Tree ensembles with a high-dimensional input domain, however, seems generally difficult to verify. In some cases though, conservative approximations of input-output mappings can greatly improve performance. This is demonstrated in a digit recognition case study, where we assess the robustness of classifiers when confronted with additive noise.
