Power Aware Scheduling For Real Time Systems
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Energy Aware Scheduling For Real Time Embedded Systems
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Author : Muhammad Khurram Bhatti
language : en
Publisher: LAP Lambert Academic Publishing
Release Date : 2012-04
Energy Aware Scheduling For Real Time Embedded Systems written by Muhammad Khurram Bhatti and has been published by LAP Lambert Academic Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-04 with categories.
Real-time embedded systems have become ubiquitous in our daily life. Due to their diversified usage, the research on these systems has confronted with many emerging challenges. One such challenge is to reduce power and energy consumption while maintaining assurance that timing constraints will be met. Power densities in microprocessors are almost doubled every three years. As energy is power integrated over time, supplying the required energy may become prohibitively expensive, or even technologically infeasible. This is particularly difficult in portable systems that heavily rely on batteries for energy, and will become even more critical as battery capacities are increasing at a much slower rate than power consumption. This book presents four contributions that are based on the thesis that energy-efficiency of Real-time Embedded Systems and scheduling are closely related problems and therefore, should be tackled together for optimal results. Contributions of this book are: 1) Two-level Hierarchical Scheduling Algorithm for Multiprocessor Systems, 2) Assertive Dynamic Power Management Scheme, 3) Deterministic Stretch-to-Fit DVFS Technique, and 4) Hybrid Power Management Scheme.
Power Aware Scheduling For Real Time Systems
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Author : Diganta Roychowdhury
language : en
Publisher:
Release Date : 2003
Power Aware Scheduling For Real Time Systems written by Diganta Roychowdhury and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Computer networks categories.
Power Aware Scheduling For Real Time Embedded Systems
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Author : Linwei Niu
language : en
Publisher:
Release Date : 2006
Power Aware Scheduling For Real Time Embedded Systems written by Linwei Niu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Embedded computer systems categories.
Driven by the remarkable evolution of IC technology and the ever-increasing human appetite for higher computing power, the dramatically increased power/energy consumption for real-time embedded systems has presented a profound challenge to researchers and developers. Battery-operated embedded devices, which have already been ubiquitous, demand low power consumption to extend the battery life and thus the mission cycles. Even for power-rich platforms, rapidly elevated power consumption raised serious concerns regarding the reliability and packaging/cooling cost as a result of the heat dissipation. It is fair to say that energy reduction has become one of the most critical design issues in the design of next generation real-time embedded systems. In our research, we seek to address this problem at the operating system level. Specifically, we believe that real-time scheduling plays a critical role in power/energy reduction not only because most embedded systems have real-time requirements, but also because significant energy savings can be achieved by taking advantage of the knowledge in application characteristics and underlying architectures known at this level. The goal of our research is to study and develop appropriate real-time scheduling techniques that can exploit the advanced power manageable features in state-of-the-art architecture to minimize the power/energy consumption while satisfying other design requirements at the same time. The contributions of the dissertation include: (i) We developed several advanced power-aware scheduling algorithms for hard real-time systems with emphasis on reducing both dynamic and leakage power consumption; (ii) We extended the system model from simple hard real-time systems to soft real-time systems with more complicated Quality of Service constraints; (iii) We also developed efficient scheduling algorithms to minimize the system-wide energy consumption with peripheral devices taken into consideration. Experimental results have demonstrated that our techniques greatly outperform existing ones. The problems discussed in this dissertation are rather general in real-time embedded system designs, and these methodologies and techniques are important both in the theoretical and practical sense.
Energy Aware Scheduling On Multiprocessor Platforms
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Author : Dawei Li
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-10-19
Energy Aware Scheduling On Multiprocessor Platforms written by Dawei Li and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-10-19 with Technology & Engineering categories.
Multiprocessor platforms play important roles in modern computing systems, and appear in various applications, ranging from energy-limited hand-held devices to large data centers. As the performance requirements increase, energy-consumption in these systems also increases significantly. Dynamic Voltage and Frequency Scaling (DVFS), which allows processors to dynamically adjust the supply voltage and the clock frequency to operate on different power/energy levels, is considered an effective way to achieve the goal of energy-saving. This book surveys existing works that have been on energy-aware task scheduling on DVFS multiprocessor platforms. Energy-aware scheduling problems are intrinsically optimization problems, the formulations of which greatly depend on the platform and task models under consideration. Thus, Energy-aware Scheduling on Multiprocessor Platforms covers current research on this topic and classifies existing works according to two key standards, namely, homogeneity/heterogeneity of multiprocessor platforms and the task types considered. Under this classification, other sub-issues are also included, such as, slack reclamation, fixed/dynamic priority scheduling, partition-based/global scheduling, and application-specific power consumption, etc.
Power Aware Scheduling For Embedded Real Time Systems
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Author :
language : en
Publisher:
Release Date : 2009
Power Aware Scheduling For Embedded Real Time Systems written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
Power And Thermal Aware Scheduling For Real Time Computing Systems
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Author : Huang Huang
language : en
Publisher: LAP Lambert Academic Publishing
Release Date : 2013
Power And Thermal Aware Scheduling For Real Time Computing Systems written by Huang Huang and has been published by LAP Lambert Academic Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
We have been enjoying tremendous benefits thanks to the revolutionary advancement of computing systems, driven by the remarkable semiconductor technology scaling and the advanced processor architecture. However, the exponentially increased transistor density has directly led to increased power consumption and elevated system temperature. The power and thermal issues have posed enormous challenges and threaten to slow down the continuous evolvement of computer technology. Effective power/thermal-aware design techniques are urgently demanded at all design abstraction levels. In this book, we present our research efforts to employ real-time scheduling techniques to solve the resource-constrained power/thermal-aware, design-optimization problems. The novelty of this work is that we integrate the cutting-edge research on power and thermal at the circuit and architectural-level into a set of accurate yet simplified system-level models, and are able to conduct system-level analysis and design based on these models. The theoretical study in this work serves as a solid foundation for the guidance of the power/thermal-aware scheduling algorithms development in practical computing systems.
Power Aware Computing
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Author : Robert Graybill
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-04-17
Power Aware Computing written by Robert Graybill and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-04-17 with Computers categories.
With the advent of portable and autonomous computing systems, power con sumption has emerged as a focal point in many research projects, commercial systems and DoD platforms. One current research initiative, which drew much attention to this area, is the Power Aware Computing and Communications (PAC/C) program sponsored by DARPA. Many of the chapters in this book include results from work that have been supported by the PACIC program. The performance of computer systems has been tremendously improving while the size and weight of such systems has been constantly shrinking. The capacities of batteries relative to their sizes and weights has been also improv ing but at a rate which is much slower than the rate of improvement in computer performance and the rate of shrinking in computer sizes. The relation between the power consumption of a computer system and it performance and size is a complex one which is very much dependent on the specific system and the technology used to build that system. We do not need a complex argument, however, to be convinced that energy and power, which is the rate of energy consumption, are becoming critical components in computer systems in gen eral, and portable and autonomous systems, in particular. Most of the early research on power consumption in computer systems ad dressed the issue of minimizing power in a given platform, which usually translates into minimizing energy consumption, and thus, longer battery life.
Energy Aware Scheduling For Multiprocessor Real Time Systems
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Author : Muhammad Khurram Bhatti
language : fr
Publisher:
Release Date : 2011
Energy Aware Scheduling For Multiprocessor Real Time Systems written by Muhammad Khurram Bhatti and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Les applications temps réel modernes deviennent plus exigeantes en termes de ressources et de débit amenant la conception d’architectures multiprocesseurs. Ces systèmes, des équipements embarqués au calculateur haute performance, sont, pour des raisons d’autonomie et de fiabilité, confrontés à des problèmes cruciaux de consommation d’énergie. Pour ces raisons, cette thèse propose de nouvelles techniques d’optimisation de la consommation d’énergie dans l’ordonnancement de systèmes multiprocesseur. La première contribution est un algorithme d’ordonnancement hiérarchique à deux niveaux qui autorise la migration restreinte des tâches. Cet algorithme vise à réduire la sous-optimalité de l’algorithme global EDF. La deuxième contribution de cette thèse est une technique de gestion dynamique de la consommation nommée Assertive Dynamic Power Management (AsDPM). Cette technique, qui régit le contrôle d’admission des tâches, vise à exploiter de manière optimale les modes repos des processeurs dans le but de réduire le nombre de processeurs actifs. La troisième contribution propose une nouvelle technique, nommée Deterministic Strech-to-Fit (DSF), permettant d’exploiter le DVFS des processeurs. Les gains énergétiques observés s’approchent des solutions déjà existantes tout en offrant une complexité plus réduite. Ces techniques ont une efficacité variable selon les applications, amenant à définir une approche plus générique de gestion de la consommation appelée Hybrid Power Management (HyPowMan). Cette approche sélectionne, en cours d’exécution, la technique qui répond le mieux aux exigences énergie / performance.
Power Aware Computer Systems
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Author : Babak Falsafi
language : en
Publisher: Springer Science & Business Media
Release Date : 2003-04-07
Power Aware Computer Systems written by Babak Falsafi and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003-04-07 with Computers categories.
This book constitutes the thoroughly refereed post-proceedings of the Second International Workshop on Power-Aware Computer Systems, PACS 2002, held in Cambridge, MA, USA, in February 2002. The 13 revised full papers presented were carefully selected for inclusion in the book during two rounds of reviewing and revision. The papers are organized in topical sections on power-aware architecture and microarchitecture, power-aware real-time systems, power modeling and monitoring, and power-aware operating systems and compilers.
Power Aware Computer Systems
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Author : Babak Falsafi
language : en
Publisher: Springer
Release Date : 2003-08-01
Power Aware Computer Systems written by Babak Falsafi and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003-08-01 with Technology & Engineering categories.
This book constitutes the thoroughly refereed post-proceedings of the Second International Workshop on Power-Aware Computer Systems, PACS 2002, held in Cambridge, MA, USA, in February 2002. The 13 revised full papers presented were carefully selected for inclusion in the book during two rounds of reviewing and revision. The papers are organized in topical sections on power-aware architecture and microarchitecture, power-aware real-time systems, power modeling and monitoring, and power-aware operating systems and compilers.