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</div> </div> </div> <div class="md-sidebar md-sidebar--secondary" data-md-component=sidebar data-md-type=toc> <div class=md-sidebar__scrollwrap> <div class=md-sidebar__inner> <nav class="md-nav md-nav--secondary" aria-label="Table of contents"> <label class=md-nav__title for=__toc> <span class="md-nav__icon md-icon"></span> Table of contents </label> <ul class=md-nav__list data-md-component=toc data-md-scrollfix> <li class=md-nav__item> <a href=#_1 class=md-nav__link> <span class=md-ellipsis> 课程简介 </span> </a> </li> <li class=md-nav__item> <a href=#_2 class=md-nav__link> <span class=md-ellipsis> 课程资源 </span> </a> </li> <li class=md-nav__item> <a href=#_3 class=md-nav__link> <span class=md-ellipsis> 资源汇总 </span> </a> </li> </ul> </nav> </div> </div> </div> <div class=md-content data-md-component=content> <article class="md-content__inner md-typeset"> <h1 id=nju-os-operating-system-design-and-implementation>NJU OS: Operating System Design and Implementation</h1> <h2 id=_1>课程简介</h2> <ul> <li>所属大学：南京大学</li> <li>先修要求：体系结构 + 扎实的 C 语言功底</li> <li>编程语言：C 语言</li> <li>课程难度：🌟🌟🌟🌟</li> <li>预计学时：150 小时</li> </ul> <p>之前一直听说南大的蒋炎岩老师开设的操作系统课程讲得很好，久闻不如一见，这学期有幸在 B 站观看了蒋老师的课程视频，确实收获良多。蒋老师作为非常年轻的老师，有着丰富的一线代码的经验，因此课程讲授有着满满的 Hacker 风格，课上经常“一言不合”就在命令行里开始写代码，很多重要知识点也都配有生动直白的代码示例。让我印象最为深刻的就是老师为了让学生更好地理解动态链接库的设计思想，甚至专门实现了一个迷你的可执行文件与一系列的二进制工具，让很多困扰我多年的问题都得到了解答。</p> <p>这门课的讲授思路也非常有趣，蒋老师先从“程序就是状态机”这一视角入手，为“万恶之源”并发程序建立了状态机的转化模型，并在此基础上讲授了并发控制的常见手段以及并发 bug 的应对方法。接着蒋老师将操作系统看作一系列对象（进程/线程、地址空间、文件、设备等等）以及操作它们的 API （系统调用）并结合丰富的实际例子介绍了操作系统是如何利用这系列对象虚拟化硬件资源并给应用软件提供各类服务的。最后的可持久化部分，蒋老师从 1-bit 的存储介质讲起，一步步构建起各类存储设备，并通过设备驱动抽象出一组接口来方便地设计与实现文件系统。我之前虽然上过许多门操作系统的课程，但这种讲法确实独此一家，让我收获了很多独到的视角来看待系统软件。</p> <p>这门课除了在理论知识的讲授部分很有新意外，注重实践也是蒋老师的一大特点。在课堂和编程作业里，蒋老师会有意无意地培养大家阅读源码、查阅手册的能力，这也是计算机从业者必备的技能。在完成第五个 MiniLab 期间，我第一次仔仔细细阅读了微软的 FAT 文件系统手册，收获了一次非常有价值的经历。</p> <p>编程作业共由 5个 MiniLab 和 4个 OSLab 组成。美中不足的是作业的评测机是不对校外开放的，不过在邮件“骚扰”后蒋老师还是非常慷慨地让我成功蹭课。由于课余时间有限我只完成了 5个 MiniLab，总体体验非常棒。尤其是第二个协程实验让我印象最为深刻，在不到百行的小实验里深刻体验了上下文切换的美妙与“可怕”。另外其实几个 MiniLab 都能非常方便地进行本地测试，就算没有评测机也不影响自学，因此希望大家不要聚众“骚扰”老师以图蹭课。</p> <p>最后再次感谢蒋老师设计并开放了这样一门非常棒的操作系统课程，这也是本书收录的第一门国内高校自主开设的计算机课程。正是有蒋老师这些年轻的新生代教师在繁重的 Tenure 考核之余的用爱发电，才让无数学子收获了难忘的本科生涯。也期待国内能有更多这样的良心好课，我也会第一时间收录进本书中让更多人受益。</p> <h2 id=_2>课程资源</h2> <ul> <li>课程网站：<a href=https://jyywiki.cn/OS/2022/index.html>https://jyywiki.cn/OS/2022/index.html</a></li> <li>课程视频：<a href="https://space.bilibili.com/202224425/channel/collectiondetail?sid=192498">https://space.bilibili.com/202224425/channel/collectiondetail?sid=192498</a></li> <li>课程教材：<a href=http://pages.cs.wisc.edu/~remzi/OSTEP/ >http://pages.cs.wisc.edu/~remzi/OSTEP/</a></li> <li>课程作业：<a href=https://jyywiki.cn/OS/2022/index.html>https://jyywiki.cn/OS/2022/index.html</a></li> </ul> <h2 id=_3>资源汇总</h2> <p>按蒋老师的要求，我的作业实现没有开源。</p> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg 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