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Mobile devices have a limited source of energy. Therefore, the efficient use of energy is a key factor for a good user experience. In the present work, we have simulated, implemented and compared policies for dynamic power management considering the power consumption and performance penalty rates of a real Wi-Fi network interfaces.
Analytical battery models such as Rakhmatov-Vrudhula are tipically represented in discrete-time, and then implemented by software. However, by means of Model-based design and automatic code generation, it is possible to generate embedded code directly from a continuous time representation. Therefore, in this work we present an analytical battery model in continuous-time by means of the Laplace transform,...
Minimizing the power consumption in mobile devices is critical to increase the battery life. The present work simulated and implemented, at the user space level, four dynamic power management policies for network interfaces. In addition, one mechanism was improved and enabled the identification of three specific workloads for network interfaces.
Network interfaces are present in a variety of battery powered computer systems, such as notebooks, ultrabooks, tablets and mobile phones. Considering that the battery life is still a constraint, there are opportunities for power management by reducing the power consumption of idle network interfaces. In this work, a dynamic timeout power policy for network interfaces is presented, incorporating workload...
Power policies are widely applied at computer systems such as desktops, notebooks, and smartphones. For example, the timeout policy to turn off the display. A power management policy must be tested by measuring the power consumption of an experimental platform running workloads. Such tests must be fast enough to feedback the development process with valuable information about the power policy performance...
Most operating systems implement their own power management techniques, but it is hard to modify or hack their power policies without the source code. Many dynamic power management architectures have been proposed in the literature, but they are not integrated with the underlying OS power manager. In this work, we propose a software framework for user-level power management, with a flexible architecture...
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