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python -m venv my_project my_project/scripts/activate.bat deactivate rmdir my_project /s python -m venv my_project --system-site-packages #可包含本系统的包。 p 阅读全文
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Thu 22 Feb 12:21:12 GMT 2018 第十二章 并发编程 使用应用级并发的应用程序称为并发程序(concurrent program).现代操作系统提供3个基本的构造并发程序的方法： + 进程 + I/O多路复用。(i/o multiplexing) + threads 12.1 阅读全文
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Sun 11 Feb 13:30:10 GMT 2018 第十一章 网络编程 11.1 The client-Server programming Model The fundamental operation in the client-server model isthe 'transactio 阅读全文
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Thu 8 Feb 15:43:18 GMT 2018 Part III interaction and communication between Programs chapter 10 System-Level I/O 10.1 Unix I/O <unistd.h> : STDIN_FILEN 阅读全文
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# Wed 31 Jan 00:36:01 GMT 2018 第九章 虚拟内存(Virtual Memory) 9.3 VM as a tool for caching virtual pages(VPs). phsical pages are also referredto as page fra 阅读全文
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# Wed 24 Jan 11:30:36 GMT 2018 第8章 异常控制流 (exceptional control flow) 8.1 exceptions Exceptions are a form of excepional control flow thatare implemente 阅读全文
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# Wed 27 Dec 18:57:00 GMT 2017 Part II running programs on a system 第七章 链接 (linking) 7.1 编译器驱动程序 编译驱动程序代表用户在需要时间调用语言预处理器，编译器，汇编器和连接器。生成 .i, .s, .o及可执行 阅读全文
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第6章 存储器层次结构 18 Dec 2017 -- The Memory Hierarchy 6.1 Storage Technologies 5816.2 Locality 6046.3 The memory hirarchy 6096.4 cache memories 6146.5 writi 阅读全文
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5.4 Eliminating loop inefficiencies A general class of optimizations is known as code motion. They involve identifying a computation that isperformed 阅读全文
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The instructions supported by a particular processor and their byte-level encodings are known as its instruc- tion set architecture(IsA). 4.1 The Y86- 阅读全文