TAILIEUCHUNG - Lecture Operating system concepts - Lecture 10

All these strategies have the same goal: to keep many processes in memory simultaneously to allow multiprogramming. However, they tend to require that an entire process be in memory before it can execute. Virtual memory is a technique that allows the execution of processes that are not completely in memory. In this chapter, we discuss virtual memory in the form of demand paging and examine its complexity and cost. | CSC 322 Operating Systems Concepts Lecture - 11: by Ahmed Mumtaz Mustehsan Special Thanks To: Tanenbaum, Modern Operating Systems 3 e, (c) 2008 Prentice-Hall, Inc. (Chapter-2) Ahmed Mumtaz Mustehsan, CIIT, Islamabad 1 Round robin Priority Multiple Queues Shortest Process Next Guaranteed Scheduling Lottery Scheduling Fair Share Scheduling Scheduling in Interactive Systems Lecture-11 Ahmed Mumtaz Mustehsan, CIIT, Islamabad 2 Run jobs according to their priority Priority can be static or can be changed dynamically Typically combine RR with priority. Each priority class uses RR inside Priority Scheduling Lecture-11 Ahmed Mumtaz Mustehsan, CIIT, Islamabad 3 4 Priority Scheduling Have to decide on a priority number (o to n) 0 can be highest or lowest Priorities can be: Internal: Set according to O/S factors (., memory requirements or other resources ) External: Set as a user policy; ., User importance, .

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