On Line Deadline Scheduling Un

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On-line Deadline Scheduling Under Relaxed Metrics of Optimality

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (681 download)

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Book Synopsis On-line Deadline Scheduling Under Relaxed Metrics of Optimality by :

Download or read book On-line Deadline Scheduling Under Relaxed Metrics of Optimality written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: (Uncorrected OCR) 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, revealing 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 performance 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 information experienced by the on-line algorithms. Although this direction seems plausible, 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.

Approximation and Online Algorithms

Author : Roberto Solis-Oba
Publisher : Springer Science & Business Media
ISBN 13 : 3540210792
Total Pages : 278 pages
Book Rating : 4.5/5 (42 download)

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Book Synopsis Approximation and Online Algorithms by : Roberto Solis-Oba

Download or read book Approximation and Online Algorithms written by Roberto Solis-Oba and published by Springer Science & Business Media. This book was released on 2004-02-12 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the thoroughly refereed post-proceedings of the First International Workshop on Approximation and Online Algorithms, WAOA 2003, held in Budapest, Hungary in September 2003. The 19 revised full papers presented together with 5 invited abstracts of the related ARACNE mini-symposium were carefully selected from 41 submissions during two rounds of reviewing and improvement. Among the topics addressed are competitive analysis, inapproximability results, randomization techniques, approximation classes, scheduling, coloring and partitioning, cuts and connectivity, packing and covering, geometric problems, network design, and applications to game theory and financial problems.

Deadline Scheduling for Real-Time Systems

Author : John A. Stankovic
Publisher : Springer Science & Business Media
ISBN 13 : 1461555353
Total Pages : 280 pages
Book Rating : 4.4/5 (615 download)

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Book Synopsis Deadline Scheduling for Real-Time Systems by : John A. Stankovic

Download or read book Deadline Scheduling for Real-Time Systems written by John A. Stankovic and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many real-time systems rely on static scheduling algorithms. This includes cyclic scheduling, rate monotonic scheduling and fixed schedules created by off-line scheduling techniques such as dynamic programming, heuristic search, and simulated annealing. However, for many real-time systems, static scheduling algorithms are quite restrictive and inflexible. For example, highly automated agile manufacturing, command, control and communications, and distributed real-time multimedia applications all operate over long lifetimes and in highly non-deterministic environments. Dynamic real-time scheduling algorithms are more appropriate for these systems and are used in such systems. Many of these algorithms are based on earliest deadline first (EDF) policies. There exists a wealth of literature on EDF-based scheduling with many extensions to deal with sophisticated issues such as precedence constraints, resource requirements, system overload, multi-processors, and distributed systems. Deadline Scheduling for Real-Time Systems: EDF and Related Algorithms aims at collecting a significant body of knowledge on EDF scheduling for real-time systems, but it does not try to be all-inclusive (the literature is too extensive). The book primarily presents the algorithms and associated analysis, but guidelines, rules, and implementation considerations are also discussed, especially for the more complicated situations where mathematical analysis is difficult. In general, it is very difficult to codify and taxonomize scheduling knowledge because there are many performance metrics, task characteristics, and system configurations. Also, adding to the complexity is the fact that a variety of algorithms have been designed for different combinations of these considerations. In spite of the recent advances there are still gaps in the solution space and there is a need to integrate the available solutions. For example, a list of issues to consider includes: preemptive versus non-preemptive tasks, uni-processors versus multi-processors, using EDF at dispatch time versus EDF-based planning, precedence constraints among tasks, resource constraints, periodic versus aperiodic versus sporadic tasks, scheduling during overload, fault tolerance requirements, and providing guarantees and levels of guarantees (meeting quality of service requirements). Deadline Scheduling for Real-Time Systems: EDF and Related Algorithms should be of interest to researchers, real-time system designers, and instructors and students, either as a focussed course on deadline-based scheduling for real-time systems, or, more likely, as part of a more general course on real-time computing. The book serves as an invaluable reference in this fast-moving field.

Handbook of Scheduling

Author : Joseph Y-T. Leung
Publisher : CRC Press
ISBN 13 : 0203489802
Total Pages : 1215 pages
Book Rating : 4.2/5 (34 download)

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Book Synopsis Handbook of Scheduling by : Joseph Y-T. Leung

Download or read book Handbook of Scheduling written by Joseph Y-T. Leung and published by CRC Press. This book was released on 2004-04-27 with total page 1215 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook provides full coverage of the most recent and advanced topics in scheduling, assembling researchers from all relevant disciplines to facilitate new insights. Presented in six parts, these experts provides introductory material, complete with tutorials and algorithms, then examine classical scheduling problems. Part 3 explores scheduling models that originate in areas such as computer science, operations research. The following section examines scheduling problems that arise in real-time systems. Part 5 discusses stochastic scheduling and queueing networks, and the final section discusses a range of applications in a variety of areas, from airlines to hospitals.

Energy Efficient Online Deadline Scheduling

Author : Kin-sum Mak
Publisher :
ISBN 13 :
Total Pages : 112 pages
Book Rating : 4.:/5 (226 download)

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Book Synopsis Energy Efficient Online Deadline Scheduling by : Kin-sum Mak

Download or read book Energy Efficient Online Deadline Scheduling written by Kin-sum Mak and published by . This book was released on 2007 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Energy Efficient Online Deadline Scheduling

Author : 麥健心
Publisher :
ISBN 13 : 9781361434161
Total Pages : pages
Book Rating : 4.4/5 (341 download)

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Book Synopsis Energy Efficient Online Deadline Scheduling by : 麥健心

Download or read book Energy Efficient Online Deadline Scheduling written by 麥健心 and published by . This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Energy Efficient Online Deadline Scheduling" by 麥健心, Kin-sum, Mak, 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 \Energy Ecient Online Deadline Scheduling" Submitted by Mak Kin Sum for the degree of Master of Philosophy at The University of Hong Kong in September 2007 Processor scheduling is a classical optimization problem. The perfor- mances of scheduling algorithms have direct impacts on the performance of computer systems. And as the proliferation of mobile devices, en- ergy usage has become an important performance measure of processor scheduling. In this thesis, we focus on online setting of scheduling prob- lems, in which the information of a job is known only on or after the job is released. We study 3 online scheduling problems, namely Energy Ef- cient Deadline Scheduling, Bounded Energy Eciency Scheduling and Randomized Algorithm for Bounded Energy Ecient Scheduling. In Energy Ecient Deadline Scheduling, we consider the case where a processor can vary its speed from 0 to T. The objective of the opti- mal schedule is to maximize its throughput and then minimize its total energy usage subject to that throughput. Previous work has focused on completing all jobs with minimum energy on a unbounded speed proces- sor. We present an online algorithm which is the rst online algorithm which works in a more realistic setting, where the speed of the processor is bounded by T and the system may be overloaded, which means theremay be no schedule that can complete all the jobs. This algorithm is proved to be constant competitive on both throughput and energy. The result is also extended to the case where jobs are assigned with dierent values. Existing work on scheduling with energy concern has focused on minimizing the energy for completing all jobs or achieving maximum throughput. That is, energy usage is a secondary concern when com- pared to throughput and the schedules targeted may be very poor in energy eciency. In Bounded Energy Eciency Scheduling, we attempt to put energy eciency as the primary concern and study how to maxi- mize throughput subject to a user-dened threshold of energy eciency. We rst show that all deterministic online algorithms have a competitive ratio at least, where is the max-min ratio of job size. Nevertheless, allowing the online algorithm to have a slightly poorer energy eciency leads to constant (i.e., independent of ) competitive online algorithm. Finally we consider a special case where no jobs are "demanding" and give a deterministic online algorithm with constant competitive ratio for this case. Finally we consider Randomized Algorithm for Bounded Energy Ef- ciency Scheduling. We rst improved the result of the randomized algorithm proposed by Goldman et al [19] which Goldman showed it is competitive in xed speed processor with non-preemptive setting. We further proved it is also competitive in preemptive setting. Later we show how to adapt and modify the randomized algorithm so that itovercome the lower bound barrier in the scheduling problem Bounded Energy Eciency Scheduling. We show the algorithm is O(log) in both preemptive and non-preemptive settings. (449 words) DOI: 10.5353/th_b3955827 Subjects: Computer scheduling Computer algorithms

On the Effectiveness of Additional Resources for On-Line Firm Deadline Scheduling

Author : 顔尊還
Publisher :
ISBN 13 : 9781374710856
Total Pages : pages
Book Rating : 4.7/5 (18 download)

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Book Synopsis On the Effectiveness of Additional Resources for On-Line Firm Deadline Scheduling by : 顔尊還

Download or read book On the Effectiveness of Additional Resources for On-Line Firm Deadline Scheduling written by 顔尊還 and published by . This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "On the Effectiveness of Additional Resources for On-line Firm Deadline Scheduling" by 顔尊還, Tsuen-wan, Ngan, 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 the Eectiveness of Additional Resources for On-line Firm Deadline Scheduling submitted by Ngan Tsuen Wan for the degree of Master of Philosophy at the University of Hong Kong in August 2001 The performance of a real-time computer system is determined by the eec- tiveness of scheduling of jobs to meet their deadlines. However, many scheduling problems in the o-line setting have been proven to be NP-complete. In other words, it is computationally infeasible to nd optimal schedules for many cases. The situation is further complicated by the fact that scheduling algorithms are on-line in nature, i.e., they do not have advance knowledge about the jobs until they are released. As expected, many scheduling problems do not admit on-line algorithms with optimal or reasonably good performance guarantee. A natural approach towards better performance guarantee is to allow on-line schedulers to have more resources (such as faster processors or extra processors). Intuitively, the additional resources compensate on-line schedulers for the lack of future in- formation. Notice that most scheduling problems remain non-trivial even if a large amount of additional resources are available. In this thesis, we revisit several classical deadline scheduling problems that aim at maximizing the total work or value of jobs that can be completed by their deadlines. We consider dierent settings, including uniprocessor and mul- tiprocessor scheduling, and jobs with the same or dierent relative importance. We show new upper bounds and lower bounds on the eectiveness of using ad- ditional resources to provide better performance guarantee. Our results allow system administrators to compare and assess various scheduling algorithms and decide the resource requirement for their systems. DOI: 10.5353/th_b2971093 Subjects: Real-time data processing Scheduling Computer capacity - Planning

On the Effectiveness of Additional Resources for On-line Firm Deadline Scheduling

Author : Tsuen-wan Ngan
Publisher :
ISBN 13 :
Total Pages : 118 pages
Book Rating : 4.:/5 (519 download)

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Book Synopsis On the Effectiveness of Additional Resources for On-line Firm Deadline Scheduling by : Tsuen-wan Ngan

Download or read book On the Effectiveness of Additional Resources for On-line Firm Deadline Scheduling written by Tsuen-wan Ngan and published by . This book was released on 2002 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Approximation and Online Algorithms

Author : Klaus Jansen
Publisher : Springer Science & Business Media
ISBN 13 : 3642183174
Total Pages : 283 pages
Book Rating : 4.6/5 (421 download)

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Book Synopsis Approximation and Online Algorithms by : Klaus Jansen

Download or read book Approximation and Online Algorithms written by Klaus Jansen and published by Springer Science & Business Media. This book was released on 2011-01-25 with total page 283 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the thoroughly refereed post workshop proceedings of the 8th International Workshop on Approximation and Online Algorithms, WAOA 2010, held in Liverpool, UK, in September 2010 as part of the ALGO 2010 conference event. The 23 revised full papers presented were carefully reviewed and selected from 58 submissions. The workshop covered areas such as algorithmic game theory, approximation classes, coloring and partitioning, competitive analysis, computational finance, cuts and connectivity, geometric problems, inapproximability results, echanism design, network design, packing and covering, paradigms for design and analysis of approximation and online algorithms, parameterized complexity, randomization techniques, real-world applications, and scheduling problems.

RED: Robust Earliest Deadline Scheduling

Author : Giorgio C. Buttazzo
Publisher :
ISBN 13 :
Total Pages : 35 pages
Book Rating : 4.:/5 (93 download)

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Book Synopsis RED: Robust Earliest Deadline Scheduling by : Giorgio C. Buttazzo

Download or read book RED: Robust Earliest Deadline Scheduling written by Giorgio C. Buttazzo and published by . This book was released on 1993 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Algorithmic Aspects in Information and Management

Author : Andrew Goldberg
Publisher : Springer
ISBN 13 : 3642021581
Total Pages : 335 pages
Book Rating : 4.6/5 (42 download)

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Book Synopsis Algorithmic Aspects in Information and Management by : Andrew Goldberg

Download or read book Algorithmic Aspects in Information and Management written by Andrew Goldberg and published by Springer. This book was released on 2009-06-18 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the proceedings of the 5th International Conference on Algorithmic Aspects in Information Management, AAIM 2009, held in San Francisco, CA, USA, in June 2009. The 25 papers presented together with the abstracts of two invited talks were carefully reviewed and selected for inclusion in this book. While the areas of information management and management science are full of algorithmic challenges, the proliferation of data (Internet, biology, finance etc) has called for the design of efficient and scalable algorithms and data structures for their management and processing. This conference is intended for original algorithmic research on immediate applications and/or fundamental problems pertinent to information management and management science, broadly construed. The conference aims at bringing together researchers in Computer Science, Operations Research, Economics, Game Theory, and related disciplines.

Packets with Deadlines

Author : I-Hong Hou
Publisher : Springer Nature
ISBN 13 : 3031792572
Total Pages : 106 pages
Book Rating : 4.0/5 (317 download)

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Book Synopsis Packets with Deadlines by : I-Hong Hou

Download or read book Packets with Deadlines written by I-Hong Hou and published by Springer Nature. This book was released on 2022-05-31 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the explosive increase in the number of mobile devices and applications, it is anticipated that wireless traffic will increase exponentially in the coming years. Moreover, future wireless networks all carry a wide variety of flows, such as video streaming, online gaming, and VoIP, which have various quality of service (QoS) requirements. Therefore, a new mechanism that can provide satisfactory performance to the complete variety of all kinds of flows, in a coherent and unified framework, is needed. In this book, we introduce a framework for real-time wireless networks. This consists of a model that jointly addresses several practical concerns for real-time wireless networks, including per-packet delay bounds, throughput requirements, and heterogeneity of wireless channels. We detail how this framework can be employed to address a wide range of problems, including admission control, packet scheduling, and utility maximization. Table of Contents: Preface / Introduction / A Study of the Base Case / Admission Control / Scheduling Policies / Utility Maximization without Rate Adaptation / Utility Maximization with Rate Adaptation / Systems with Both Real-Time Flows and Non-Real-Time Flows / Broadcasting and Network Coding / Bibliography / Authors' Biographies

Approximation, Randomization and Combinatorial Optimization: Algorithms and Techniques

Author : Michel Goemans
Publisher : Springer
ISBN 13 : 3540446664
Total Pages : 314 pages
Book Rating : 4.5/5 (44 download)

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Book Synopsis Approximation, Randomization and Combinatorial Optimization: Algorithms and Techniques by : Michel Goemans

Download or read book Approximation, Randomization and Combinatorial Optimization: Algorithms and Techniques written by Michel Goemans and published by Springer. This book was released on 2003-05-15 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the joint refereed proceedings of the 4th International Workshop on Approximation Algorithms for Optimization Problems, APPROX 2001 and of the 5th International Workshop on Ranomization and Approximation Techniques in Computer Science, RANDOM 2001, held in Berkeley, California, USA in August 2001. The 26 revised full papers presented were carefully reviewed and selected from a total of 54 submissions. Among the issues addressed are design and analysis of approximation algorithms, inapproximability results, on-line problems, randomization, de-randomization, average-case analysis, approximation classes, randomized complexity theory, scheduling, routing, coloring, partitioning, packing, covering, computational geometry, network design, and applications in various fields.

Control of Robot Manipulators in Joint Space

Author : Rafael Kelly
Publisher : Springer Science & Business Media
ISBN 13 : 9781852339944
Total Pages : 746 pages
Book Rating : 4.3/5 (399 download)

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Book Synopsis Control of Robot Manipulators in Joint Space by : Rafael Kelly

Download or read book Control of Robot Manipulators in Joint Space written by Rafael Kelly and published by Springer Science & Business Media. This book was released on 2005-06-27 with total page 746 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tutors can design entry-level courses in robotics with a strong orientation to the fundamental discipline of manipulator control pdf solutions manual Overheads will save a great deal of time with class preparation and will give students a low-effort basis for more detailed class notes Courses for senior undergraduates can be designed around Parts I – III; these can be augmented for masters courses using Part IV

Deadline Scheduling in a Multiprogrammed Computer Environment

Author : John Raleigh Jordan
Publisher :
ISBN 13 :
Total Pages : 116 pages
Book Rating : 4.:/5 (182 download)

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Book Synopsis Deadline Scheduling in a Multiprogrammed Computer Environment by : John Raleigh Jordan

Download or read book Deadline Scheduling in a Multiprogrammed Computer Environment written by John Raleigh Jordan and published by . This book was released on 1974 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Automata, Languages and Programming

Author : Luca Aceto
Publisher : Springer Science & Business Media
ISBN 13 : 3540705740
Total Pages : 919 pages
Book Rating : 4.5/5 (47 download)

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Book Synopsis Automata, Languages and Programming by : Luca Aceto

Download or read book Automata, Languages and Programming written by Luca Aceto and published by Springer Science & Business Media. This book was released on 2008-06-24 with total page 919 pages. Available in PDF, EPUB and Kindle. Book excerpt: ICALP 2008, the 35th edition of the International Colloquium on Automata, Languages and Programming, was held in Reykjavik, Iceland, July 7–11, 2008. ICALP is a series of annual conferences of the European Association for Th- reticalComputer Science(EATCS) which ?rsttook placein 1972.This year,the ICALP program consisted of the established Track A (focusing on algorithms, automata,complexityandgames)andTrackB(focusing onlogic,semanticsand theory of programming), and of the recently introduced Track C (focusing on security and cryptography foundations). In response to the call for papers, the Program Committees received 477 submissions, the highest ever: 269 for Track A, 122 for TrackB and 86 for Track C. Out of these, 126 papers were selected for inclusion in the scienti?c program: 70 papers for Track A, 32 for Track B and 24 for Track C. The selection was made by the Program Committees based on originality, quality, and relevance to theoretical computer science. The quality of the manuscripts was very high indeed, and many deserving papers could not be selected. ICALP 2008 consisted of ?ve invited lectures and the contributed papers.

Computing and Combinatorics

Author : Tandy Warnow
Publisher : Springer Science & Business Media
ISBN 13 : 3540405348
Total Pages : 573 pages
Book Rating : 4.5/5 (44 download)

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Book Synopsis Computing and Combinatorics by : Tandy Warnow

Download or read book Computing and Combinatorics written by Tandy Warnow and published by Springer Science & Business Media. This book was released on 2003-07-09 with total page 573 pages. Available in PDF, EPUB and Kindle. Book excerpt: The papers in this volume were presented at the 9th Annual International C- puting and Combinatorics Conference (COCOON 2003), held July 25–28, 2003, in Big Sky, MT, USA. The topics cover most aspects of theoretical computer science and combinatorics related to computing. Submissionstotheconferencethisyearwereconductedelectronically.Atotal of 114 papers were submitted, of which 52 were accepted. The papers were evaluated by an international program committee consisting of Nina Amenta, Tetsuo Asano, Bernard Chazelle, Zhixiang Chen, Francis Chin, Kyung-Yong Chwa, Robert Cimikowski, Anne Condon, Michael Fellows, Anna Gal, Michael Hallett,DanielHuson,NaokiKatoh,D.T.Lee,BernardMoret,BrendanMumey, Gene Myers, Hung Quang Ngo, Takao Nishizeki, Cindy Phillips, David Sanko?, Denbigh Starkey, Jie Wang, Lusheng Wang, Tandy Warnow and Binhai Zhu. It is expected that most of the accepted papers will appear in a more complete form in scienti?c journals. The submitted papers were from Canada (6), China (7), Estonia (1), F- land (1), France (1), Germany (8), Israel (4), Italy (1), Japan (11), Korea (22), Kuwait (1), New Zealand (1), Singapore (2), Spain (1), Sweden (2), Switzerland (3), Taiwan (7), the UK (1) and the USA (34). Each paper was evaluated by at least three Program Committee members, assisted in some cases by subre- rees. In addition to selected papers, the conference also included three invited presentations by Jon Bentley, Dan Gus?eld and Joel Spencer.