Real-time dynamic voltage scaling for low-power embedded operating systems
SOSP '01 Proceedings of the eighteenth ACM symposium on Operating systems principles
Dynamic Power Optimization Targeting User Delays in Interactive Systems
IEEE Transactions on Mobile Computing
Operating System Modifications for Task-Based Speed and Voltage
Proceedings of the 1st international conference on Mobile systems, applications and services
IEEE Computer Architecture Letters
TSB: A DVS algorithm with quick response for general purpose operating systems
Journal of Systems Architecture: the EUROMICRO Journal
An analysis of power consumption in a smartphone
USENIXATC'10 Proceedings of the 2010 USENIX conference on USENIX annual technical conference
Dynamic voltage and frequency scaling: the laws of diminishing returns
HotPower'10 Proceedings of the 2010 international conference on Power aware computing and systems
Chameleon: operating system support for dynamic processors
ASPLOS XVII Proceedings of the seventeenth international conference on Architectural Support for Programming Languages and Operating Systems
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Dynamic power management schemes in mobile devices such as smartphones and tablet PCs enhance battery life at the cost of prolonged user-perceived response time while the response time is a crucial factor for user experience. This paper presents systematic analysis of existing power management schemes adopted in recent smartphones in terms of user-perceived response time and energy consumption. For this analysis, we developed a latency measurement benchmark tool to quantify responsiveness to user inputs and used it with an externally-connected power meter to concurrently measure energy consumption and response latency. The evaluation showed that some existing DVFS schemes can significantly harm the response time. More seriously, the analysis revealed that the processor hotplug technique for multi-core systems may reduce responsiveness even without any gain in energy savings.