tailieunhanh - Lecture Operating system concepts - Module 23

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 23: Windows NT History Design Principles System Components Environmental Subsystems File system Networking Programmer Interface Operating System Concepts Windows NT 32-bit preemptive multitasking operating system for modern microprocessors. Key goals for the system: portability security POSIX compliance multiprocessor support extensibility international support compatibility with MS-DOS and MS-Windows applications. Uses a micro-kernel architecture. Available in two versions, Windows NT Workstation and Windows NT Server. In 1996, more NT server licenses were sold than UNIX licenses Operating System Concepts History In 1988, Microsoft decided to develop a “new technology” (NT) portable operating system that supported both the OS/2 and POSIX APIs. Originally, NT was supposed to use the OS/2 API as its native environment but during development NT was changed t use the Win32 API, reflecting the popularity of Windows . Operating System Concepts Design Principles Extensibility — . | Module 23: Windows NT History Design Principles System Components Environmental Subsystems File system Networking Programmer Interface Operating System Concepts Windows NT 32-bit preemptive multitasking operating system for modern microprocessors. Key goals for the system: portability security POSIX compliance multiprocessor support extensibility international support compatibility with MS-DOS and MS-Windows applications. Uses a micro-kernel architecture. Available in two versions, Windows NT Workstation and Windows NT Server. In 1996, more NT server licenses were sold than UNIX licenses Operating System Concepts History In 1988, Microsoft decided to develop a “new technology” (NT) portable operating system that supported both the OS/2 and POSIX APIs. Originally, NT was supposed to use the OS/2 API as its native environment but during development NT was changed t use the Win32 API, reflecting the popularity of Windows . Operating System Concepts Design Principles Extensibility — layered architecture. NT executive, which runs in protected mode, provides the basic system services. On top of the executive, several server subsystems operate in user mode. Modular structure allows additional environmental subsystems to be added without affecting the executive. Portability — NT can be moved from on hardware architecture to another with relatively few changes. Written in C and C++. Processor-dependent code is isolated in a dynamic link library (DLL) called the “hardware abstraction layer” (HAL). Operating System Concepts Design Principles (Cont.) Reliability — NT uses hardware protection for virtual memory, and software protection mechanisms for operating system resources. Compatibility — applications that follow the IEEE (POSIX) standard can be complied to run on NT without changing the source code. Performance — NT subsystems can communicate with one another via high-performance message passing. Preemption of low priority threads enables the system to respond .

• 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