CS 656: Operating Systems

Nachos

Nachos is an instructional operating system developed at the University of California in Berkeley which is executed as a UNIX user process. The Nachos operations system is build on top of a simulation of the MIPS R2/3000 instruction set. We will be working with Version 3.2 of the Nachos distribution. Nachos is written in C++ but does not use all the features of the C++ language.

We will use Nachos for two programming homeworks.

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• Homework #3 and additional information.
• Information on Nachos and Homework #2
• Additional Documentation
• Important Information
• Installation

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Homework #3 and additional information

Homework #3.

Nachos Networking Background.

Q&A on Homework #3.

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Information on Nachos and the Homeworks

Homework #2.

Q&A on Homework #2.

Overview of Nachos.

Mechanics for the Homeworks.

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Additional Documentation

A Quick Introduction to C++.

"The Nachos Instructional Operating System". This is a survey paper written by the authors of the Nachos operating systems.

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Important Information

Our Nachos only runs on Sun Sparc workstations. If you experience problems with Solaris, switch to a machine that runs SunOS 4.1.x .

Use gmake for Makefiles.

For debugging use gdb version 4.10 or later.

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Installation

Go to your home directory.

Use ftp to fetch the nachos.tar file (turning on binary mode first) from directory /uf23/jorg/CS656_/Mosaic/nachos.

Do a tar -xf nachos.tar. This will create a nachos directory.

(If you want a printout of the nachos source code do a cd nachos; gmake print ).

Do a cd nachos; gmake all to compile nachos. gmake will create Makefiles in the following subdirectories: bin, network, userprog, filesys, test, vm, machine, threads.

For Homework #2 you will create Nachos in the subdirectory threads and userprog by doing cd nachos/threads; gmake , cd userprog/threads; gmake .

Test-run the provided versions of Nachos:

For Part 1 of Homework#2: Do a cd nachos/threads; then do nachos . ( nachos -d prints out debug information.)

For Part 2 of Homework#2: Do a cd nachos/userporg and then nachos .

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jorg@cs.virginia.edu (Last updated 06-Mar-1995)