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)

Chorus Developed at INRIA, France, from 1980 on. Commercialised by Chorus Systèmes in 1988. Basic ideas similar to Mach Servers can be: user-level, dynamically loaded into kernel (to save system call costs). Support for group communication (multicast, any of a group). Like Mach, kernel threads, port groups. Uses password capabilities but servers use ACL based protection. Uses copy-on-write, but receiver controls placement of data. Chorus UNIX emulation System call redirection to server(s) All UNIX emulation in server (to avoid protection problems) Further information in[DA92,RAA$^+$90,RAA$^+$92,CDK94,Sin97].