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Author : Jacek Błażewicz
Publisher :
ISBN 13 :
Total Pages : 7 pages
Book Rating : 4.:/5 (897 download)
Download or read book Simple Algorithms for Multiprocessor Scheduling to Meet Deadlines written by Jacek Błażewicz and published by . This book was released on 1977 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Sanjoy Baruah
Publisher : Springer
ISBN 13 : 3319086960
Total Pages : 234 pages
Book Rating : 4.3/5 (19 download)
Download or read book Multiprocessor Scheduling for Real-Time Systems written by Sanjoy Baruah and published by Springer. This book was released on 2015-01-02 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive overview of both theoretical and pragmatic aspects of resource-allocation and scheduling in multiprocessor and multicore hard-real-time systems. The authors derive new, abstract models of real-time tasks that capture accurately the salient features of real application systems that are to be implemented on multiprocessor platforms, and identify rules for mapping application systems onto the most appropriate models. New run-time multiprocessor scheduling algorithms are presented, which are demonstrably better than those currently used, both in terms of run-time efficiency and tractability of off-line analysis. Readers will benefit from a new design and analysis framework for multiprocessor real-time systems, which will translate into a significantly enhanced ability to provide formally verified, safety-critical real-time systems at a significantly lower cost.
Author : Jacek Blazewicz
Publisher : Springer
ISBN 13 : 3319998498
Total Pages : 833 pages
Book Rating : 4.3/5 (199 download)
Download or read book Handbook on Scheduling written by Jacek Blazewicz and published by Springer. This book was released on 2019-04-25 with total page 833 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a theoretical and application-oriented analysis of deterministic scheduling problems in advanced planning and computer systems. The text examines scheduling problems across a range of parameters: job priority, release times, due dates, processing times, precedence constraints, resource usage and more, focusing on such topics as computer systems and supply chain management. Discussion includes single and parallel processors, flexible shops and manufacturing systems, and resource-constrained project scheduling. Many applications from industry and service operations management and case studies are described. The handbook will be useful to a broad audience, from researchers to practitioners, graduate and advanced undergraduate students.
Author : S. Martello
Publisher : Elsevier
ISBN 13 : 0080872433
Total Pages : 395 pages
Book Rating : 4.0/5 (88 download)
Download or read book Surveys in Combinatorial Optimization written by S. Martello and published by Elsevier. This book was released on 2011-09-22 with total page 395 pages. Available in PDF, EPUB and Kindle. Book excerpt: A collection of papers surveying recent progress in the field of Combinatorial Optimization.Topics examined include theoretical and computational aspects (Boolean Programming, Probabilistic Analysis of Algorithms, Parallel Computer Models and Combinatorial Algorithms), well-known combinatorial problems (such as the Linear Assignment Problem, the Quadratic Assignment Problem, the Knapsack Problem and Steiner Problems in Graphs) and more applied problems (such as Network Synthesis and Dynamic Network Optimization, Single Facility Location Problems on Networks, the Vehicle Routing Problem and Scheduling Problems).
Author : H. A. Eiselt
Publisher : Springer Science & Business Media
ISBN 13 : 9783540403388
Total Pages : 476 pages
Book Rating : 4.4/5 (33 download)
Download or read book Decision Analysis, Location Models, and Scheduling Problems written by H. A. Eiselt and published by Springer Science & Business Media. This book was released on 2004-01-12 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this book is to provide readers with an introduction to the fields of decision making, location analysis, and project and machine scheduling. The combination of these topics is not an accident: decision analysis can be used to investigate decision seenarios in general, location analysis is one of the prime examples of decision making on the strategic Ievel, project scheduling is typically concemed with decision making on the tactical Ievel, and machine scheduling deals with decision making on the operational Ievel. Some of the chapters were originally contributed by different authors, and we have made every attempt to unify the notation, style, and, most importantly, the Ievel of the exposition. Similar to our book on Integer Programming and Network Models (Eiselt and Sandblom, 2000), the emphasis of this volume is on models rather than solution methods. This is particularly important in a book that purports to promote the science of decision making. As such, advanced undergraduate and graduate students, as weil as practitioners, will find this volume beneficial. While different authors prefer different degrees of mathematical sophistication, we have made every possible attempt to unify the approaches, provide clear explanations, and make this volume accessible to as many readers as possible.
Author : Jacek Blazewicz
Publisher : Springer Science & Business Media
ISBN 13 : 3662043637
Total Pages : 485 pages
Book Rating : 4.6/5 (62 download)
Download or read book Scheduling Computer and Manufacturing Processes written by Jacek Blazewicz and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written in a clear and concise manner this book provides a theoretical and application oriented analysis of deterministic scheduling problems arising in computer and manufacturing environments. Various scheduling problems are discussed where different problem parameters such as task processing times, urgency weights, arrival times, deadlines, precedence constraints, and processor speed factor are involved. Polynomial and exponential time optimization algorithms as well as approximation and heuristic approaches are presented and discussed. Moreover, resource-constrained, imprecise computation, flexible flow shop and dynamic job shop scheduling, as well as flexible manufacturing systems, are considered. An excellent analysis based on real-world applications with plenty of examples.
Author : Wolfgang Händler
Publisher : Springer Science & Business Media
ISBN 13 : 9783540108276
Total Pages : 526 pages
Book Rating : 4.1/5 (82 download)
Download or read book CONPAR 81 written by Wolfgang Händler and published by Springer Science & Business Media. This book was released on 1981-06 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Alexander D. Stoyenko
Publisher : Springer Science & Business Media
ISBN 13 : 3642880495
Total Pages : 774 pages
Book Rating : 4.6/5 (428 download)
Download or read book Real Time Computing written by Alexander D. Stoyenko and published by Springer Science & Business Media. This book was released on 2013-12-14 with total page 774 pages. Available in PDF, EPUB and Kindle. Book excerpt: NATO's Division of Scientific and Environmental Affairs sponsored this Advan ced Study Institute because it was felt to be timely to cover this important and challengjng subject for the first time in the framework of NATO's ASI programme. The significance of real-time systems in everyones' life is rapidly growing. The vast spectrum of these systems can be characterised by just a few examples of increasing complexity: controllers in washing machines, air traffic control systems, control and safety systems of nuclear power plants and, finally, future military systems like the Strategic Defense Initiative (SDI). The import ance of such systems for the well-being of people requires considerable efforts in research and development of highly reliable real-time systems. Furthermore, the competitiveness and prosperity of entire nations now depend on the early app lication and efficient utilisation of computer integrated manufacturing systems (CIM), of which real-time systems are an essential and decisive part. Owing to its key significance in computerised defence systems, real-time computing has also a special importance for the Alliance. The early research and development activities in this field in the 1960s and 1970s aimed towards improving the then unsatisfactory software situation. Thus, the first high-level real-time languages were defined and developed: RTL/2, Coral 66, Procol, LTR, and PEARL. In close connection with these language develop ments and with the utilisation of special purpose process control peripherals, the research on real-time operating systems advanced considerably.
Author : Jacek Błażewicz
Publisher :
ISBN 13 :
Total Pages : 380 pages
Book Rating : 4.F/5 ( download)
Download or read book Scheduling Under Resource Constraints written by Jacek Błażewicz and published by . This book was released on 1986 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jacek Blazewicz
Publisher : Springer Science & Business Media
ISBN 13 : 3662000741
Total Pages : 319 pages
Book Rating : 4.6/5 (62 download)
Download or read book Scheduling in Computer and Manufacturing Systems written by Jacek Blazewicz and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the result of a joint Gennan-Polish project which has been partially sup ported by the Committee for Scientific Research 1 and the Deutsche Forschungsge meinschaft2. We appreciate the help of both institutions. The planning and preparation of the manuscript was an iterative and rather lengthy process which we had to stop at a certain stage, but it does not mean that we were fully satisfied with the output. Thus, comments and improvements will be appreciated. In the meantime we would like to thank many colleagues who already discussed with us different topics presented in the book. We are not able to list all of them but we would like to express our special gratitude toward Peter Brucker, Gerd Finke, Adam Janiak, Wieslaw Kubiak, Kathryn Stecke, and Dominique de Werra. As to the technical help in preparing the manuscript our thanks are due to Barbara Blarewicz, Brigitte Ecker, Maria Kaminska, and Brigitte Sand, especially for their typing efforts.
Author : 杜家強
Publisher : Open Dissertation Press
ISBN 13 : 9781374723351
Total Pages : 70 pages
Book Rating : 4.7/5 (233 download)
Download or read book ON-LINE DEADLINE SCHEDULING UN written by 杜家強 and published by Open Dissertation Press. This book was released on 2017-01-27 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "On-line Deadline Scheduling Under Relaxed Metrics of Optimality" by 杜家強, Kar-keung, To, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled On-line Deadline Scheduling under Relaxed Metrics of Optimality submitted by Kar-Keung To for the degree of Doctor of Philosophy at The University of Hong Kong in August 2000. In this thesis, we study on-line algorithms that schedule jobs with deadlines to one or more processors. By the nature of job deadlines, such scheduling algorithms are classified into hard-deadline algorithms and firm-deadline algorithms. Traditionally, on-line algorithms are measured by metrics like optimality and competitiveness. They compare the on-line algorithm against an off-line adversary, which has full knowledge of the future. Previous results on on-line deadline scheduling were very negative, re- vealing that for most settings, no on-line algorithm can be optimal or achieves constant competitive ratio. This resulted in a situation that although algorithms for deadline scheduling are needed practically, none of them can provide theoretically sound perfor- mance guarantee. Kalyanasundaram and Pruhs [JACM 2000] proposed using relaxed metrics to analyze scheduling algorithms. Such metrics give the on-line algorithms more resources than the off-line adversary, compensating for the lack of future infor- mation experienced by the on-line algorithms. Although this direction seems plausi- ble, the study of optimal deadline scheduling under such metrics has been limited to hard-deadline algorithms. This thesis furthers the study, showing better algorithms for optimal hard-deadline scheduling and extending the study to the more general firm- deadline setting. For multiprocessor hard-deadline scheduling, we give a new algorithm that achieves optimality with less speedy processors than previous algorithms. We also derive a new lower bound of processor speed required by any hard-deadline algorithm to be optimal. For the more general setting of firm-deadline scheduling, we analyze a simple algorithm EDF-AC, which augments EDF (the popular Earliest-Deadline-First algorithm) with a simple notion of admission control. We show that EDF-AC is optimal using speedy processors in both uniprocessor and multiprocessor settings. This is the first result achieving optimality in firm-deadline scheduling. Furthermore, we propose studying the effect of the extra speed required for optimality when extra processors are also available. We find that, for most algorithms we study, the extra speed can be arbitrarilyreduced when enough extra processors are available. The metric of competitiveness can be relaxed just like the metric of optimality. Kalyanasundaram and Pruhs showed a uniprocessor firm-deadline algorithm that is competitive when faster processors are available. We improve their result, lowering the competitive ratio by using a better analysis without modifying the algorithm. More- over, we extend their algorithm to the multiprocessor setting and show that the extended algorithm achieves the same competitive ratio. DOI: 10.5353/th_b3014088 Subjects: Scheduling Real-time data processing Computer algorithms
Author : André M. van Tilborg
Publisher : Springer Science & Business Media
ISBN 13 : 1461539560
Total Pages : 331 pages
Book Rating : 4.4/5 (615 download)
Download or read book Foundations of Real-Time Computing: Scheduling and Resource Management written by André M. van Tilborg and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 331 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains a selection of papers that focus on the state-of the-art in real-time scheduling and resource management. Preliminary versions of these papers were presented at a workshop on the foundations of real-time computing sponsored by the Office of Naval Research in October, 1990 in Washington, D.C. A companion volume by the title Foundations of Real-Time Computing: Fonnal Specifications and Methods complements this book by addressing many of the most advanced approaches currently being investigated in the arena of formal specification and verification of real-time systems. Together, these two texts provide a comprehensive snapshot of current insights into the process of designing and building real-time computing systems on a scientific basis. Many of the papers in this book take care to define the notion of real-time system precisely, because it is often easy to misunderstand what is meant by that term. Different communities of researchers variously use the term real-time to refer to either very fast computing, or immediate on-line data acquisition, or deadline-driven computing. This text is concerned with the very difficult problems of scheduling tasks and resource management in computer systems whose performance is inextricably fused with the achievement of deadlines. Such systems have been enabled for a rapidly increasing set of diverse end-uses by the unremitting advances in computing power per constant-dollar cost and per constant-unit-volume of space. End-use applications of deadline-driven real-time computers span a spectrum that includes transportation systems, robotics and manufacturing, aerospace and defense, industrial process control, and telecommunications.
Download or read book Real-time Scheduling Algorithms for Precedence Related Tasks on Heterogeneous Multiprocessors written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The problem of real-time scheduling has been very well researched for the single processor case and the identical multiprocessor case. There are a number of efficient algorithms and schedulability tests that enable the system designer to model his/her application as a set of real-time tasks. However, it may very well be the case that the multiprocessor system consists of processors with different speeds and configurations. This heterogeneity makes the scheduling problem much more complex. Real-time scheduling on heterogeneous multiprocessors has not received much attention in the scheduling literature. We propose several algorithms for scheduling a set of precedence related tasks on heterogeneous multiprocessors. In the first section, we propose a reliability driven algorithm for scheduling periodic tasks on heterogeneous systems. We relax the assumption that all the processors in the system are equally reliable. We introduce a new metric called cost of dependability. The periodic tasks are assigned to processors in such a way that the reliability of the system is maximized. We observe that our scheme generate schedules that are consistently more reliable than the schedules generated by algorithms that do not take the reliability of the processors into account. In the second section, we propose a duplication based algorithm for scheduling a set of soft deadline tasks on a system of heterogeneous multiprocessors. We observe that communicating tasks assigned to different processors have to incur a delay by using the inter-processor communication channel. By duplicating any of these two tasks on either assigned processor, we can cut down on that delay. Hence tasks can start (and hence finish) earlier. This leads to a larger number of tasks meeting their deadlines and hence an increase in the guarantee ratio of the real-time application. The next section extends the concept of task duplication to a set of hard deadline tasks. The deadlines are hard in that even a single deadline miss could lead to catastrophic results. By employing task duplication, we observe that a larger number of task sets are able to finish execution before their deadlines. Hence, the success ratio of the application experiences an increment. Based on our simulation results, we observe that our proposed algorithm offers a higher success ratio as compared to the other algorithms that do not use task duplication. It may very well be the case that the real-time application consists of a mix of tasks with hard and soft deadlines. In the next section, we propose an integrated scheme for scheduling a mix of hard and soft deadline tasks on heterogeneous multiprocessors. We observe that our scheme offers a better schedulability as compared to the other algorithms in the literature when sufficient processors are available and when communication is a dominant factor in the system. Moreover, our algorithm is scalable in that the application can be scheduled even if sufficient processors are not available for the initial cluster generation.
Author : Jane W. S. Liu
Publisher :
ISBN 13 :
Total Pages : 48 pages
Book Rating : 4.:/5 (31 download)
Download or read book Algorithms for Scheduling Imprecise Computations written by Jane W. S. Liu and published by . This book was released on 1990 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : W. Feng
Publisher :
ISBN 13 :
Total Pages : 36 pages
Book Rating : 4.:/5 (31 download)
Download or read book Algorithms for Scheduling Tasks with Input Error and End-to-end Deadlines written by W. Feng and published by . This book was released on 1994 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "This paper describes heuristic algorithms for scheduling preemptive, imprecise, composite tasks with input error and end- to-end timing constraints. Each composite task consists of a chain of component tasks, where each component task is made up of a mandatory part and an optional part. Whenever a component task uses imprecise input, the mandatory and optional parts of the component task may be extended in order to compensate for input error. We use a two-level scheduler. At the high level, the scheduler schedules the composite tasks preemptively on one processor, according to an existing algorithm for scheduling simple imprecise tasks. The result is the total amount of time budgeted to each composite task in order for all composite tasks to meet their end-to-end deadlines. The low-level scheduler then distributes the time budgeted for each composite task across its component tasks so as to minimize the output error of each composite task."
Author : David Paul Helmbold
Publisher :
ISBN 13 :
Total Pages : 248 pages
Book Rating : 4.F/5 ( download)
Download or read book Parallel Algorithms for Scheduling and Related Problems written by David Paul Helmbold and published by . This book was released on 1987 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Donald W. Gillies
Publisher :
ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.:/5 (31 download)
Download or read book Scheduling Tasks with AND/OR Precedence Constraints written by Donald W. Gillies and published by . This book was released on 1991 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: These algorithms provide the same level of worst-case performance as some previous priority-driven algorithms for scheduling AND-only task systems."
