Linux Notes
Do what we want based on what others already did with additional abstraction and organization to service for uses.
- Preface
- Provide valuable insight to pepole who want to know more about the critical design issues in a modern operating system.
- Understand how things really work inside the machine, often called microprocessor or MPU or SoC.
- Two ways of designing OS: design OS based on specific hardware platform, or skip the hardware-dependent details and concentrate on the pure hardware-independent parts of the kernel.
- Efficient kernels take advantage of most available hardware features, such as addressing techniques, caches, processor exceptions, special instructions, control registers, I/O registers, memory management unit(MMU), and so on.
- When covering hardware features, out strategy is only sketch the features that are totally hardware-driven while detailing those that need some software support.
- shall be interested in kernel design rather than in computer architecture.
- Learning kernel shall use the bottom-up approach, hardware-->I/0 registers-->control registers-->OS-->system call-->User app
- Start with data structures needed to support he functions described in the chapter, Then move from the lowest level of functions to higher levels, often ending by showing how system calls issued by user applications are supported
- Memory management, including mmp, file buffering, process swapping, and Direct memory Access
- The virtual Filesystem layer and the Second and Third Extended Filesystems.
- Process creation and scheduling
- Signals, interrupts, and the essential interfaces to device drivers
- Timing
- Sychronization within the kernel
- Interprocess Communication
- Program Execution
- Introduction
- Linux was initially developed by Linus Torvalds in 1991 as an OS for IBM-compatible personal computers based on the Intel 80386 microprocessor.
- The current standards specify only an application programming interface API that is, a well-defined environment in which user programs should run.
- Windows NT and its descendents are POSIX-compliant.
- Unix-like kernels often share fundamental design ideas and features.
- Adopt the best features and desgin choices of several different Unix kernels.
- Monolithic kernel: large, complex, conventional
- Compiled and Statically linked traditional kernels:load and unload dynamically some portions of the kernel code, device drivers which are usually called modules.
- Kernel threading: organized as a set of kernel threads.A kernel thread is an execution context that can be independently scheduled;it may be associated with a user program, or it may run only some kernel functions. Context switches between kernel threads are usually much less expensive than context switches between ordinary processes, because the former usually operate on a common address space.
- adf
- zcv
- zcv
- dfadf
adf
Linux Notes的更多相关文章
- Linux Notes | Linux常用命令行笔记
[ show all running processes ] (1) ps -aux | less 'ps' means: Process Status The -a option tells ps ...
- Linux Notes:Linux下的远程登录协议及软件
常见的远程登录协议 1.RDP(remote desktopp protocol)协议,windows远程桌面协议 2.telnet CLI 界面下远程管理,几乎所有的操作系统都有,数据明文传输,不安 ...
- 对于linux下system()函数的深度理解(整理)
原谅: http://blog.sina.com.cn/s/blog_8043547601017qk0.html 这几天调程序(嵌入式linux),发现程序有时就莫名其妙的死掉,每次都定位在程序中不同 ...
- 转:对于linux下system()函数的深度理解(整理)
这几天调程序(嵌入式linux),发现程序有时就莫名其妙的死掉,每次都定位在程序中不同的system()函数,直接在shell下输入system()函数中调用的命令也都一切正常.就没理这个bug,以为 ...
- 【C/C++】Linux下system()函数引发的错误
http://my.oschina.net/renhc/blog/54582 [C/C++]Linux下system()函数引发的错误 恋恋美食 恋恋美食 发布时间: 2012/04/21 11:3 ...
- (笔记)Linux下system()函数的深度理解(整理)
注:从其它地方转的非常好的一篇文章,值得深究! 这几天调程序(嵌入式linux),发现程序有时就莫名其妙的死掉,每次都定位在程序中不同的system()函数,直接在shell下输入system()函数 ...
- [转载]Linux下关于system调用
曾经的曾经,被system()函数折磨过,之所以这样,是因为对system()函数了解不够深入.只是简单的知道用这个函数执行一个系统命令,这远远不够,它的返回值.它所执行命令的返回值以及命令执行失败原 ...
- linux system函数引发的错误
转: https://my.oschina.net/renhc/blog/54582 先看一下问题 简单封装了一下system()函数: int pox_system(const char *cm ...
- Linux 驱动开发
linux驱动开发总结(一) 基础性总结 1, linux驱动一般分为3大类: * 字符设备 * 块设备 * 网络设备 2, 开发环境构建: * 交叉工具链构建 * NFS和tftp服务器安装 3, ...
随机推荐
- jQuery对象扩展方法(Extend)深度解析
1.这几天在写自己的Js工具类库,所以在编写对象扩展方法,参考了jQuery的对象扩展方法,在编写该方法前,需要掌握js深拷贝和浅拷贝的相关知识,下面是jQuery3.2.1版本对象扩展方法的源码: ...
- feignClient中修改ribbon的配置
1.使用@FeignClient注解发现服务 服务提供者的controller: @RestController public class StudentController { @Autowired ...
- web操作文件的上传到服务器 并可下载 并且读取出来
1.文件的上传-servlet实现文件上传---核心API—DiskFileItemFactory 一.文件上传概述 l 实现web开发中的文件上传功能,需完成如下二步操作: • 在web页面 ...
- 【数组】Subsets
题目: Given a set of distinct integers, nums, return all possible subsets. Note: Elements in a subset ...
- mock时忽略不必要的初始化
PowerMockito.mockStatic时忽略加载类的静态field,比如想PowerMockito.mockStatic(ClassA.class),ClassA如下 public class ...
- mysql中sql中的注释
学习mysql好久了,oracle也是,但是经常使用oracle,有一天突然想,oracle的sql语法中有注释,那么mysql中是不是也有注释,于是从网上搜了一下,原来mysql中的注释还真不少,下 ...
- OSI及TCP/IP的概念和区别
什么是TCP/IP协议 TCP/IP协议(Transfer Controln Protocol/Internet Protocol)叫做传输控制/网际协议,又叫网络通讯协议,这个协议是Internet ...
- Python36和Python27共存的方法
Python26和Python37环境的配置 设置环境变量 我的电脑右键属性-高级系统属性-环境变量 选择系统变量中的Path,双击打开 加入你的Python安装路径 C:\Python27;C:\P ...
- 设置主外键时 ORA-02298: 无法验证 - 未找到父项关键字 --NOVALIDATE;
主要原因是: 在添加CONSTRAINT的时候,默认是需要VALIDATE表中的已有数据的. 你要插入的表A里,有外键连接到另一个表B的主键,你在表A的外键列插入的值,在表B的主键列找不到就不能插入. ...
- i.mx6 Android5.1.1 System server
1. 概述: 1. Zygote进程是Android Java世界的开创者,所有的Java应用程序进程都由Zygote进程创建: 2. Zygote创建应用程序进程过程其实就是复制自身进程地址空间作为 ...