- What is OS?
- Why learn OS?
- CHanllenges and how to overcome?
- Brief history of OS
Warmsups
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Computer organization 计算机导论
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CPU, ISA, assembly, etc
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Lifetime of a “Hello World” programms
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CPU相关(上下文切换，线程)
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内存（地址反应、TLB和缓存，需求分页）
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调度
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锁（条件变量、互斥锁、读写锁）
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IO设备和磁盘
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文件系统设计
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虚拟机
What is OS?
- A bridge between hardware and apps/users
- a special software layer that provides and manages the access from apps/users to hardare resources(CPU, memory, disk, etc)
The Role of OS
- OS as referee
- OS as illusionist
- OS as glue
as referee(裁判)
- Resource allocation
- Multitasks on constrained resources
- Isolation(隔离)
- Fault in one app shall not disrupt others
- Prevent malicious attackers
资源分配和隔离(内存隔离)
As illusionist
As glue
- Providing common services to facilitate resource sharing
- Decouplu HW and app development
Goal of OS
- Manage hardware resources
- 管理硬件资源，如何去分配资源
- Facilitate app developers
- Facilitate users
Warms up
CPU大致结构
寄存器类型可能需要记一下
