COP4600_17-5-10 - COP4600 Operating System Structures...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: COP4600 17-5-10 Operating System Structures Microkernel Mach an early example of a microkernel OS; it's been used to host an emulator for other OSen (e.g., UNIX). user-space user prog user prog user prog UNIX emulator minimal kernel memory process terminal low-level comm management management driver software disk drivers network drivers hardware- user programs use API's of the UNIX emulator- UNIX emulator uses API of MM and PM- MM interacts with disk drivers- LLCS interacts with the network drivers- drivers interact with the hardware Why microkernel OS? (take 2) * services that run above the kernel are easier to engineer, update, tune, & maintain * the kernel is responsible for providing efficient basic mechanisms * user-level servers flexibly implement system policies- can enable programmers to (more easily) control priorities Why not microkernel OS? * performance has (traditionally) been an issue- a given service may respond more slowly when implemented at the user level Other examples of Client-Server architectures Windows NT Win32 Win32 OS/2 OS/2 POSIX POSIX App ServerApp ServerApp Server ^ ^ ^ \...
View Full Document

This note was uploaded on 02/22/2011 for the course ECON 2023 taught by Professor Rush during the Spring '08 term at University of Florida.

Page1 / 4

COP4600_17-5-10 - COP4600 Operating System Structures...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online