Advanced Operating Systems   COMP9242 2002/S2

UNSW

Printer-Friendly Version Administration                - Notices - Course Intro - Consultations # On-line Survey (closed) - Survey Results   Work - Lectures - Milestone 0 - Project Admin - Project Spec - Project FAQ - Exam   Documentation - ASysT Lab - L4 source browser - Sulima ISA Simulator - R4x00 ISA Summary  - MIPS R4700 Reference - MIPS R4000 User Manual  - Network Driver - GT64111   Related Info - Aurema OS Prize - OS Hall of Fame   History - 2000 - 1999 - 1998   Staff - Gernot Heiser (LiC)

OS Structure OS server is chief of client processes. Client's ``system calls'' are library stubs performing RPC to OS server. ``OS'' may consist of many server threads in same or separate tasks. OS server may redirect client requests to other servers within OS server task, outside OS server task. Clans & chiefs mechanism: prevents direct client access to servers running as separate tasks, supports easy redirection of ``system call'' RPC.