TAILIEUCHUNG - Lecture Operating system principles - Chapter 5: Concurrency: Mutual exclusion and synchronization

After studying this chapter, you should be able to: Discuss basic concepts related to concurrency, such as race conditions, OS concerns, and mutual exclusion requirements; understand hardware approaches to supporting mutual exclusion; define and explain semaphores; define and explain monitors. | Chapter 5 Concurrency: Mutual Exclusion and Synchronization Principals of Concurrency Mutual Exclusion: Hardware Support Semaphores Readers/Writers Problem Multiple Processes Central to the design of modern Operating Systems is managing multiple processes Multiprogramming Multiprocessing Distributed Processing Big Issue is Concurrency Managing the interaction of all of these processes Interleaving and Overlapping Processes Earlier (Ch2) we saw that processes may be interleaved on uniprocessors Interleaving and Overlapping Processes And not only interleaved but overlapped on multi-processors Both interleaving and overlapping present the same problems in concurrent processing One Difficulty of Concurrency Sharing of global resources can be problematic A Simple Example void echo() { // send a keyboard-input character to display chin = getchar(); chout = chin; putchar(chout); } What would happen if P1 is interrupted here by P2? Suppose echo is a shared procedure and P1 .

• Hệ điều hành
• Operating system
• Lecture Operating system principles
• Hệ điều hành
• Computer system
• Mutual exclusion
• Message passing
• Operating system concepts
• Lecture Operating system concepts
• Operating system services
• Operating system structures
• Operating system design
• Operating system structure
• Computer system organization
• Operating System Debugging
• Operating System Generation
• Types of System Calls
• Modern operating systems
• Evolution of operating systems
• Computer system structures
• File system interface
• File system implementation
• Computer system architecture
• The Linux system