TAILIEUCHUNG - Operating System Concepts (3)

Module 3: Operating-System Structures.• System Components.• Operating System Services.• System Calls.• System Programs.• System Structure.• Virtual Machines.• System Design and Implementation.• System Generation. Silberschatz and Galvin 1999 Common System Components.• Process Management.• Main Memory Management.• Secondary-Storage Management.• I/O System Management.• File Management.• Protection System.• Networking.• Command-Interpreter System. Silberschatz and Galvin 1999 Process Management.• A process is a program in execution. A process needs certain. resources, including CPU time, memory, files, and I/O devices, to. accomplish its task• The operating system is responsible for the following activities in. connection with process management – Process creation and deletion – process suspension and resumption – Provision of mechanisms for:. process synchronization. process communication. Silberschatz and Galvin 1999 Main-Memory Management.• Memory is a large array of words or bytes, each with its own. address. It is a repository of quickly accessible data shared by. the CPU and I/O devices• Main memory is a volatile storage device. It loses its contents in. the case of system failure• The operating system is responsible for the following activities in. connections with memory management:. – Keep track of which parts of memory are currently being. used and by whom – Decide which processes to load when memory space. becomes available – Allocate and deallocate memory space as needed Silberschatz and Galvin 1999 Secondary-Storage Management.• Since main memory (primary storage) is volatile and too small to. accommodate all data and programs permanently, the computer. system must provide secondary storage to back up main. memory• Most modern computer systems use disks as the principle on-line. storage medium, for both programs and data• The operating system is responsible for the following activities in. connection with disk management:. – Free space management. – Storage allocation. – Disk scheduling. Silberschatz and Galvin 1999 I/O System Management.• The I/O system consists of:. – A buffer-caching system. – A general device-driver interface. – Drivers for specific hardware devices. Silberschatz and Galvin 1999 File Management.• A file is a collection of related information defined by its creator Commonly, files represent programs (both source and object. forms) and data• The operating system is responsible for the following activities in. connections with file management:. – File creation and deletion – Directory creation and deletion – Support of primitives for manipulating files and directories – Mapping files onto secondary storage – File backup on stable (nonvolatile) storage media Silberschatz and Galvin 1999 Protection System.• Protection refers to a mechanism for controlling access by. programs, processes, or users to both system and user. resources• The protection mechanism must:. – distinguish between authorized and unauthorized usage – specify the controls to be imposed – provide a means of enforcement Silberschatz and Galvin 1999 Networking (D

• Sáng kiến kinh nghiệm
• Operating system concepts
• Lecture Operating system concepts
• Operating system
• Operating system services
• Operating system structures
• Operating system design
• Operating system structure
• Hệ điều hành
• Lecture Operating system principles
• Computer system
• Modern operating systems
• Evolution of operating systems
• Multiprocessor operating systems
• Operating systems
• Lecture Operating systems
• Structure of operating systems
• Distributed operating systems
• Memory management
• Computer system organization
• Operating system concept
• File systems
• Operating systems design
• Operating systems capabilities
• Network operating system
• Operating System Debugging
• Operating System Generation
• Types of System Calls
• Bài giảng Hệ điều hành
• Lecture Advanced Operating Systems
• Advanced Operating Systems
• Bài giảng Hệ điều hành nâng cao
• Server operating systems
• PC operating systems
• Main frame operating systems
• Real time operating systems
• History of operating systems
• The operating system zoo
• Computer hardware review
• System calls
• Computer system structures
• Operations on processes
• Thread libraries
• CPU scheduling
• Process synchronization
• Handling deadlocks
• Virtual memory
• File system interface
• File system implementation
• Application I O interface
• Mass storage systems