csapp的第4个lab，三个部分都有，其中第三个部分CPE是7.6左右，具体优化方法都有注释，希望对大家有帮助！

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经典教材深入理解计算机系统最新版实验材料！ 经典教材深入理解计算机系统最新版实验材料！

CSAPP 英文版 pdf A Tour of Computer Systems 1 1.1 Information Is Bits + Context 3 1.2 Programs Are Translated by Other Programs into Different Forms 4 1.3 It Pays to Understand How Compilation Systems Work 6 1.4 Processors Read and Interpret Instructions Stored in Memory 7 1.4.1 Hardware Organization of a System 7 1.4.2 Running the hello Program 10 1.5 Caches Matter 12 1.6 Storage Devices Form a Hierarchy 13 1.7 The Operating System Manages the Hardware 14 1.7.1 Processes 16 1.7.2 Threads 17 1.7.3 Virtual Memory 17 1.7.4 Files 19 1.8 Systems Communicate with Other Systems Using Networks 20 1.9 Important Themes 21 1.9.1 Concurrency and Parallelism 21 1.9.2 The Importance of Abstractions in Computer Systems 24 1.10 Summary 25 Bibliographic Notes 26