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    Energy Efficient Smartphones: Minimizing the Energy Consumption of Smartphone GPUs using DVFS Governors

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    Name:
    Enas Ahmad Thesis.pdf
    Size:
    4.838Mb
    Format:
    PDF
    Description:
    Enas Ahmad Thesis Approval Form
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    Type
    Thesis
    Authors
    Ahmad, Enas M.
    Advisors
    Shihada, Basem cc
    Committee members
    Alouini, Mohamed-Slim cc
    Hardwiger, Markus
    Program
    Computer Science
    KAUST Department
    Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division
    Date
    2013-05-15
    Embargo End Date
    2014-05-15
    Permanent link to this record
    http://hdl.handle.net/10754/292322
    
    Metadata
    Show full item record
    Access Restrictions
    At the time of archiving, the student author of this thesis opted to temporarily restrict access to it. The full text of this thesis became available to the public after the expiration of the embargo on 2014-05-15.
    Abstract
    Modern smartphones are being designed with increasing processing power, memory capacity, network communication, and graphics performance. Although all of these features are enriching and expanding the experience of a smartphone user, they are significantly adding an overhead on the limited energy of the battery. This thesis aims at enhancing the energy efficiency of modern smartphones and increasing their battery life by minimizing the energy consumption of smartphones Graphical Processing Unit (GPU). Smartphone operating systems are becoming fully hardware-accelerated, which implies relying on the GPU power for rendering all application graphics. In addition, the GPUs installed in smartphones are becoming more and more powerful by the day. This raises an energy consumption concern. We present a novel implementation of GPU Scaling Governors, a Dynamic Voltage and Frequency Scaling (DVFS) scheme implemented in the Android kernel to dynamically scale the GPU. The scheme includes four main governors: Performance, Powersave, Ondmand, and Conservative. Unlike previous studies which looked into the power efficiency of mobile GPUs only through simulation and power estimations, we have implemented our approach on a real modern smartphone GPU, and acquired actual energy measurements using an external power monitor. Our results show that the energy consumption of smartphones can be reduced up to 15% using the Conservative governor in 2D rendering mode, and up to 9% in 3D rendering mode, with minimal effect on the performance.
    Citation
    Ahmad, E. M. (2013). Energy Efficient Smartphones: Minimizing the Energy Consumption of Smartphone GPUs using DVFS Governors. KAUST Research Repository. https://doi.org/10.25781/KAUST-SL583
    DOI
    10.25781/KAUST-SL583
    ae974a485f413a2113503eed53cd6c53
    10.25781/KAUST-SL583
    Scopus Count
    Collections
    MS Theses; Computer Science Program; Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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