TAILIEUCHUNG - Lecture Operating system concepts - Module 12

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. | Module 12: I/O Systems I/O hardwared Application I/O Interface Kernel I/O Subsystem Transforming I/O Requests to Hardware Operations Performance Operating System Concepts I/O Hardware Incredible variety of I/O devices Common concepts Port Bus (daisy chain or shared direct access) Controller (host adapter) I/O instructions control devices Devices have addresses, used by Direct I/O instructions Memory-mapped I/O Operating System Concepts Polling Determines state of device command-ready busy error Busy-wait cycle to wait for I/O from device Operating System Concepts Interrupts CPU Interrupt request line triggered by I/O device Interrupt handler receives interrupts Maskable to ignore or delay some interrupts Interrupt vector to dispatch interrupt to correct handler Based on priority Some unmaskable Interrupt mechanism also used for exceptions Operating System Concepts Interrupt-drive I/O Cycle Operating System Concepts Direct Memory Access Used to avoid programmed I/O for large data .

• Hệ điều hành
• Operating system concepts
• Lecture Operating system concepts
• Operating system
• Computer system organization
• Operating system structure
• Operating system services
• Operating system structures
• Operating system design
• Hệ điều hành
• Operating System Debugging
• Operating System Generation
• Types of System Calls
• Computer system structures
• File system interface
• File system implementation
• Computer system architecture
• The Linux system