Disk layout optimization for reducing energy consumption
Proceedings of the 19th annual international conference on Supercomputing
Power reduction techniques for microprocessor systems
ACM Computing Surveys (CSUR)
PICSEL: measuring user-perceived performance to control dynamic frequency scaling
Proceedings of the 13th international conference on Architectural support for programming languages and operating systems
ISCA '08 Proceedings of the 35th Annual International Symposium on Computer Architecture
Power to the people: Leveraging human physiological traits to control microprocessor frequency
Proceedings of the 41st annual IEEE/ACM International Symposium on Microarchitecture
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Energy efficiency is a very important and challenging issue for resource-constrained mobile computers. In this paper, we propose a dynamic software management (DSM) framework to improve battery utilization, and avoid competition for limited energy resources from multiple applications. We have designed and implemented a DSM module in user space, independent of the operating system (OS), which explores quality-of-service (QoS) adaptation to reduce system energy and employs a priority-based preemption policy for multiple applications. It also employs energy macro-models for mobile applications to aid in this endeavor. By monitoring the energy supply and predicting energy demand at each QoS level, the DSM module is able to select the best possible trade-off between energy conservation and application QoS. To the best of our knowledge, this is the first energy-aware coordinated framework utilizing adaptation of mobile applications. It honors the priority desired by the user and is portable to POSIX-compliant OSs. Our experimental results for some mobile applications (video player, speech recognizer, voice-over-IP) show that this approach can meet user-specified task-oriented goals and improve battery utilization significantly. They also show that prediction of application energy demand based on energy macro-models is a key component of this framework.