CSE 361S: Introduction to Systems Software

Welcome to the Fall 2006 Course Homepage!

Here you can find all the information that you'll need throughout the semester. All announcements will be made on this page so I recommend you monitor it regularly.

Course resources:

• Course information: text, times, locations, etc.
• Syllabus: Course notes and assignments.
• References
  References on the web
  • C
  • tools

Announcements

• Homework 4: See hw4.doc
  Posted: 05-12-2006 15:39 by fredk

• Final Project: I have posted the final project: shlab.html. The lab is due no later then midnight on 15 December 2006 (the last week of classes).
  Posted: 22-11-2006 08:56 by fredk

• Homework 3: I have posted Homework 3. You are to complete and turn in for grading any 5 of the questions.
  Posted: 09-11-2006 18:07 by fredk

• lab 3: Lab 3 description: Lab3.html. If you just want to browse the source code see memLab.
  Posted: 07-11-2006 19:46 by fredk

• Lab2 source: The source for my solution to lab2 is in this directory: histlab. Notice how i hhave changed the makefile and source so that I do not have to separately compile for each dta set. Rather the makefile builds one version of the executable for each data set.
  Posted: 07-11-2006 09:14 by fredk

• Using gprof: As shown in class, I have written a simple program to demonstrate both efficient and inefficient C code. Copy the files onto your own system and follow the directions in the vec.txt file. This is not an assignment to be turned in. Spend some time looking at the code and output from gprof. You should be able to identify why the slow version of the functions perform so poorly and why there is so little difference between the fast and med versions.
  Vec.
  Posted: 26-10-2006 19:06 by fredk

• Source from Tuesday: Source code examples shown in class on 10/10: combine.c and optest.c. The functions for reading a high resolution time (pentium cycle counter) are in timer.h and timer.c.
  Posted: 12-10-2006 18:08 by fredk

• Lab 2: Lab2 is due no later than midnight on Friday, 10/20.
  
  Posted: 06-10-2006 15:23 by fredk

• Testing for primes: Facts: all numbers can be represented as a product of primes. If a number is prime then it is equal to the product of 1 and itself (both prime numbers):

  P = 1 * P.

  If a number is not prime then it may be represented as the product of 2 or more prime numbers other than 1.

  X = P1 * P2 * ... Pn

  Further, at least one of these prime numbers (P_i) is less than or equal to the square root of the subject number:

  Pi ≤ sqrt(X)

  This is easy to prove by assuming it not to be true then showing the resulting product must be > X.

  In our source code example we use the modulo operator '%' to determine whether a number is prime. In one version we compare each candidate to all values between itself and 2. In the other version we just compare candidates to prime numbers less than itself or 2¹⁶ (whichever is less). So the question is: why do we use 64K (2¹⁶)? The answer: 64K is equal to the square root of 2³². That is, we are guaranteed that the square root of any integer represented by a 32-bit number is less than this value.

  
  Posted: 05-10-2006 17:54 by fredk

• Quiz 0: Answers to Quiz 0 quiz0.doc.
  Posted: 03-10-2006 17:38 by fredk

• Homework 2: Homework 2 is due start of class on Thursday, 10/12.
  Posted: 03-10-2006 15:36 by fredk

• Lab1 posted: lab1.html is due the start of class on Tuesday 3 October 2006.
  Posted: 22-09-2006 18:22 by fredk

• floating point representation: Source code shown in class: byteRep. To compile enter the command gcc -o byteRep byteRep
  Posted: 19-09-2006 18:07 by fredk

• 8bit float example: I created spreadsheet illustrating how to represent a floating point number using the IEEE format and an 8-bit format. See float-8bit.xls
  Posted: 16-09-2006 10:04 by fredk

• Implementing the celing function: Here is a powerpoint slide explaining how to implement the floor function in C (example.ppt).
  Posted: 15-09-2006 15:47 by fredk

• Homework 1: I have posted homework 1
  Posted: 15-09-2006 13:32 by fredk

• Endian spreadsheet: A simple spreadsheet showing 32-bit and 16-bit words.
  Posted: 14-09-2006 17:35 by fredk

• Urbauer labs: You can use any of the Linux hosts in the Urbauer lab room 116. The lab schedule is posted at http://fp.cse.wustl.edu/UrbauerLabs, I have requested for the lab for our use (cse361) on Mondays from 2:30 to 4:00 and Wednesdays from 4:00 to 5:30. But you may use the room any other time when a class is not scheduled.
  Posted: 07-09-2006 18:00 by fredk

• Lab0 posted: lab0.html is due the start of class on Thursday 14 September 2006.
  Posted: 07-09-2006 17:58 by fredk

Last update: 05-12-2006 15:40