操作系统Chapter01_OSComputer System Overview知识讲稿.pptVIP

* Operating Systems * Course Info 重要性：考研必考 有一定难度: 1. 知识基础较多 2. 原理和算法，理解记忆较多 * Teaching Materials William Stallings，Operating System-Internal and Design Principles. 5th edition. 电子工业出版社。 * Teaching Materials Abraham Silberschatz etc.，Operating System Concepts . 6th edition. 高等教育出版社.。 * Course Index Part 1 Operating System Overview Part 2 Process Description and Control Part 3 Threads, SMP, and Microkernels Part 4 Concurrency: Mutual Exclusion and Synchronization Part 5 Concurrency: Deadlock and Starvation Part 6 Memory Management and Virtual Memory Part 7 Processor Scheduling Part 8 I/O Management and Disk Scheduling Part 9 File Management * Any suggestion Email Phone * Computer System Overview Chapter 1 * Operating System Exploits the hardware resources of one or more processors Provides a set of services to system users Manages secondary memory and I/O devices * 1.1 Basic Elements Processor Main Memory volatile referred to as real memory or primary memory I/O modules secondary memory devices communications equipment terminals System bus communication among processors, memory, and I/O modules * Top-Level Components * 1.2 Processor Two internal registers Memory address register (MAR) Specifies the address for the next read or write Memory buffer register (MBR) Contains data written into memory or receives data read from memory I/O address register I/O buffer register * Processor Registers User-visible registers Enable programmer to minimize main-memory references by optimizing register use Control and status registers Used by processor to control operating of the processor Used by privileged operating-system routines to control the execution of programs * User-Visible Registers May be referenced by machine language Available to all programs - application programs and system programs Types of registers Data Address Index Segment pointer Stack pointer * Control and Status Registers Progr