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任务 任务管理 任务调度 优先级反转

❖ Fairness----Prevent starvation ❖ Efficiency ❖ Throughput ❖ Response time

5.3.1 What is semaphore? 5.3.2 Two Uses of Semaphores 5.3.3 Producer/Consumer Problem 5.3.4 Implement of Semaphores 5.3.5 Semaphore in UNIX

Overview of Mass Storage Structure Disk Structure Disk Scheduling (磁盘调度) Disk Management Swap-Space Management RAID (磁盘阵列) Structure

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background Contiguous Memory Allocation (连续内存分配) Swapping Paging (分页) Structure of the Page Table Segmentation (分段) Segmentation with paging (段页式)

1 Background 2 The Critical-Section Problem (临界区问题) 3 Peterson’s Solution 4 Synchronization Hardware TestAndSet Instruction Swap Instruction 5 Semaphores 6 Classical Problems of Synchronization 7 Monitors 8 Synchronization Examples

1 Overview 2 Multithreading Models 3 Thread Libraries 4 Threading Issues 5 OS Examples for Thread 6 Thread Scheduling OS Examples for Thread Scheduling