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A hierarchial CPU scheduler for multimedia operating systems
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Predicting MPEG execution times
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Energy-aware adaptation for mobile applications
Proceedings of the seventeenth ACM symposium on Operating systems principles
The Psychology of Human-Computer Interaction
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Control-theoretic dynamic frequency and voltage scaling for multimedia workloads
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Reducing the Energy Usage of Office Applications
Middleware '01 Proceedings of the IFIP/ACM International Conference on Distributed Systems Platforms Heidelberg
Frame-based dynamic voltage and frequency scaling for a MPEG decoder
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Energy-efficient soft real-time CPU scheduling for mobile multimedia systems
SOSP '03 Proceedings of the nineteenth ACM symposium on Operating systems principles
Integrated power management for video streaming to mobile handheld devices
MULTIMEDIA '03 Proceedings of the eleventh ACM international conference on Multimedia
Application-directed voltage scaling
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Energy-aware video streaming with QoS control for portable computing devices
NOSSDAV '04 Proceedings of the 14th international workshop on Network and operating systems support for digital audio and video
Formal online methods for voltage/frequency control in multiple clock domain microprocessors
ASPLOS XI Proceedings of the 11th international conference on Architectural support for programming languages and operating systems
Practical voltage scaling for mobile multimedia devices
Proceedings of the 12th annual ACM international conference on Multimedia
Vertigo: automatic performance-setting for Linux
OSDI '02 Proceedings of the 5th symposium on Operating systems design and implementationCopyright restrictions prevent ACM from being able to make the PDFs for this conference available for downloading
Operating System Modifications for Task-Based Speed and Voltage
Proceedings of the 1st international conference on Mobile systems, applications and services
Policies for dynamic clock scheduling
OSDI'00 Proceedings of the 4th conference on Symposium on Operating System Design & Implementation - Volume 4
Puppeteer: Component-based adaptation for mobile computing
USITS'01 Proceedings of the 3rd conference on USENIX Symposium on Internet Technologies and Systems - Volume 3
Adaptive CPU Scheduling to Conserve Energy in Real-Time Mobile Graphics Applications
ISVC '08 Proceedings of the 4th International Symposium on Advances in Visual Computing
Predictive-flow-queue-based energy optimization for gigabit ethernet controllers
IEEE Transactions on Very Large Scale Integration (VLSI) Systems
On Balancing Energy Consumption, Rendering Speed, and Image Quality on Mobile Devices
International Journal of Handheld Computing Research
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In this paper, we present Chameleon---an application-level power management approach for reducing energy consumption in mobile processors. Our approach exports the entire responsibility of power management decisions to the application level. We propose an operating system interface that can be used by applications to achieve energy savings. We consider three classes of applications---soft real-time, interactive and batch---and design user-level power management strategies for representative applications such as a movie player, a word processor, a web browser, and a batch compiler. We also design a user level power manager based on GraceOS using Chameleon. We implement our approach in the Linux kernel running on a Sony Transmeta laptop. Our experiments show that, compared to the traditional system-wide CPU voltage scaling approaches, Chameleon can achieve up to 32-50% energy savings while delivering comparable or better performance to applications. Further, Chameleon imposes small overheads and is very effective at scheduling concurrent applications with diverse energy needs.