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Real-Time Task Scheduling for Energy-Aware Embedded Systems

2005
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Release : 2005
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Book Synopsis Real-Time Task Scheduling for Energy-Aware Embedded Systems by :

Download or read book Real-Time Task Scheduling for Energy-Aware Embedded Systems written by . This book was released on 2005. Available in PDF, EPUB and Kindle. Book excerpt: We present a new approach for scheduling workloads containing periodic tasks in real-time systems. The proposed approach minimizes the total energy consumed by the task set and guarantees that the deadline for every periodic task is met. As embedded software becomes a larger component of system-on-a-chip design, energy management using the operating system becomes increasingly important. We present a mixed-integer linear programming model for the NP-complete scheduling problem and solve it for moderate-sized problem instances using a public-domain solver. For larger task sets, we present a novel low-energy earliest-deadline-first (LEDF) scheduling algorithm and apply it to two real-life task sets.

Energy-aware Scheduling on Multiprocessor Platforms

2012-10-20 Business & Economics
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Release : 2012-10-20
Genre : Business & Economics
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Book Rating : 236/5 ( reviews)

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Book Synopsis Energy-aware Scheduling on Multiprocessor Platforms by : Dawei Li

Download or read book Energy-aware Scheduling on Multiprocessor Platforms written by Dawei Li. This book was released on 2012-10-20. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Energy-Aware Scheduling for Real-Time Embedded Systems

2012-04
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Release : 2012-04
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Book Rating : 056/5 ( reviews)

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Book Synopsis Energy-Aware Scheduling for Real-Time Embedded Systems by : Muhammad Khurram Bhatti

Download or read book Energy-Aware Scheduling for Real-Time Embedded Systems written by Muhammad Khurram Bhatti. This book was released on 2012-04. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Investigating the Effect of Voltage-Switching on Low-Energy Task Scheduling in Hard Real-Time Systems

2005
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Release : 2005
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Book Synopsis Investigating the Effect of Voltage-Switching on Low-Energy Task Scheduling in Hard Real-Time Systems by :

Download or read book Investigating the Effect of Voltage-Switching on Low-Energy Task Scheduling in Hard Real-Time Systems written by . This book was released on 2005. Available in PDF, EPUB and Kindle. Book excerpt: We investigate the effect of voltage-switching on task execution times and energy consumption for dual-speed hard real-time systems, and present a new approach for scheduling workloads containing periodic tasks. Our method minimizes the total energy consumed by the task set and guarantees that the deadline for every task is met. We present a mixed-integer linear programming model for the NP complete scheduling problem and solve it for moderate sized problem instances using a public-domain solver. For larger task sets, we present a novel extended-low-energy earliest-deadline-first (E-LEDF) scheduling algorithm and apply it to two real-life task sets. Our results show that energy can be conserved in embedded real-time systems using energy-aware task scheduling. We also show that switching times have a significant effect on the energy consumed in hard real-time systems.

Energy-aware Real-time Scheduling on Heterogeneous and Homogeneous Platforms in the Era of Parallel Computing

2021
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Release : 2021
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Book Synopsis Energy-aware Real-time Scheduling on Heterogeneous and Homogeneous Platforms in the Era of Parallel Computing by : Ashik Ahmed Bhuiyan

Download or read book Energy-aware Real-time Scheduling on Heterogeneous and Homogeneous Platforms in the Era of Parallel Computing written by Ashik Ahmed Bhuiyan. This book was released on 2021. Available in PDF, EPUB and Kindle. Book excerpt: Multi-core processors increasingly appear as an enabling platform for embedded systems, e.g., mobile phones, tablets, computerized numerical controls, etc. The parallel task model, where a task can execute on multiple cores simultaneously, can efficiently exploit the multi-core platform’s computational ability. Many computation-intensive systems (e.g., self-driving cars) that demand stringent timing requirements often evolve in the form of parallel tasks. Several real-time embedded system applications demand predictable timing behavior and satisfy other system constraints, such as energy consumption.

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