薛智文臺灣大學：資訊工程學研究所吳維凱Wu, Wei-KaiWei-KaiWu2007-11-262018-07-052007-11-262018-07-052007http://ntur.lib.ntu.edu.tw//handle/246246/53819嵌入式系統的設計開發人員，目前亟需一套精確可靠的能耗量測工具。MP3隨身聽是目前最普遍的掌上型多媒體播放器，其中續航力的問題，已成為一項重要的設計考量。在這篇論文中，我們改進一個在多工環境下，整合系統執行資訊的實體量測能耗分析工具，並透過大量的實驗，驗證這套工具，建立一套MP3能耗量測標準方法。實驗中，考慮到經過各種最佳化的MP3播放器，對不同長度、位元率或曲風的MP3歌曲，利用正規的統計方法，驗證量測結果的誤差。相信這套能耗量測分析工具的實驗方法，同樣能適用於其它應用上。An accurate and reliable energy consumption measurement tool is very important for the designers of modern embedded systems. MP3 Walkman is almost the most popular hand-held multimedia player, and the endurance of a MP3 player has become an critical issue. In this thesis, we revise a physical measurement-based tool which integrates energy consumption with system execution information in multi-tasking systems. We validate this tool and establish a standard approach of MP3 energy measuring by a large number of experiments. Different optimizations of a MP3 player or variable lengths, bit rates, and music styles of a MP3 music are considered in the experiments, and we make use of a statistical approach to verify the measurement results. We believe the experiment approach using energy consumption measurement and analysis tool can be adopted to other applications as well.1 Introduction 1 2 Related Work and Background 5 2.1 Simulation-Based Tools . . . . . . . . . . . . 5 2.2 Physical Measurement-Based Tools . . . . . . . 7 2.3 Task-Based Energy Consumption Analysis Tool . . 8 2.3.1 Features . . . . .. . . . . . . . . . . . 9 2.3.2 System Architecture . . . . . . . . . . 11 2.3.3 Operation Flow Path . . . . . . . . . . . 12 3 Tool Revising 15 3.1 Sampling Problem . . . . . . . . . . . . . . . 15 3.1.1 Sample Rate . . . . . . . . . . . . . . . 16 3.1.2 Determination of Channel1 Voltage . . . . 17 3.2 Function-Based Measurement . . . . . . . . . . 19 4 Experiments on MP3 21 4.1 Method . . . . . . . . . . . . . . . . . . . . 21 4.2 Experiments and Analysis . . . . . . . . . . . 22 4.2.1 MP3 Player of Different Optimizations . . 25 4.2.2 MP3 Music of Different Lengths . . . . . 32 4.2.3 MP3 Music of Different Bit Rates . . . . 36 4.2.4 MP3 Music of Different Music Styles . . . 37 5 Conclusion and Future Work 39 Bibliography 40747980 bytesapplication/pdfen-US嵌入式系統能耗值實體量測MP3統計方法embedded systemenergy consumptionphysical measurementstatistical approach[SDGs]SDG7thesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/53819/1/ntu-96-R94922008-1.pdf