[MIT 6.S081] Lec 1: Introduction and examples 笔记

Lec 1: Introduction and examples

• Ref: https://github.com/huihongxiao/MIT6.S081/tree/master/lec01-introduction-and-examples
• Preparation: xv6 book Chapter 1

课程目标

• OS Design 操作系统设计
• Hands-on Exe 操作系统实践

OS PURPOSE

• Abstract Hardware 硬件抽象
• Mutiplex 在许多应用程序中复用硬件资源
• Isolation 隔离性, 不同活动互不干涉
• Sharing 共享
• Security 安全系统和权限
• Performance 性能
• Range of uses 多种用途

OS ORGANIZATION

API-KERNEL

系统调用
fd = open("out",1)
write(fd, "hello\n", 6);
pid = fork() 创建新进程

HARD/INTERSETING

• Environment 环境
• Tensions 解决矛盾
  • Efficient - Abstract
  • Powerful - Simple API
  • Flexible - Security