In life, if you take your blessings for granted they can be revoked. Chinua Achebe's Things Fall
Apart (1958) describes the internal and external destabilization of Umuofia society. Okonkwos
personal beliefs and ignorance ultimately led to his downfall, a
Name two differences between logical and physical addresses.
A logical address does not refer to an actual existing address; rather,
it refers to an abstract address in an abstract address space. Contra
Is disk scheduling, other than FCFS scheduling, useful in a single-user
environment? Explain your answer.
In a single-user environment, the I/O queue usually is empty. Requests
Consider a le currently consisting of 100 blocks. Assume that the lecontrol block (and the index block, in the case of indexed allocation)
is already in memory. Calculate how many disk I/O oper
Some systems automatically delete all user les when a user logs off or
a job terminates, unless the user explicitly requests that they be kept;
other systems keep all les unless the user explicitly
Under what circumstances do page faults occur? Describe the actions
taken by the operating system when a page fault occurs.
A page fault occurs when an access to a page that has not been
State three advantages of placing functionality in a device controller,
rather than in the kernel. State three disadvantages.
a. Bugs are less likely to cause an operating system cra
What are the main differences between capability lists and access lists?
An access list is a list for each object consisting of the domains with a
nonempty set of access rights for that object. A capab
Dynamically loadable kernel modules give exibility when drivers are
added to a system, but do they have disadvantages too? Under what
circumstances would a kernel be compiled into a single binary le, and
Project 732 Pattern Recognition and Neural Networks
(This is a team project not more than 3 students per team)
Project Part 1: . Select a topic and a simulator that pertains to the subject matter of the
class. Make sure the topic is extensive enough and t
Provide three programming examples in which multithreading provides
better performance than a single-threaded solution.
A parallelized application such as matrix multiplication where
different parts o
In Section 5.4, we mentioned that disabling interrupts frequently can
affect the systems clock. Explain why this can occur and how such
effects can be minimized.
The system clock is updated
What is the purpose of system calls?
System calls allow user-level processes to request services of the operating system.
What are the ve major activities of an operating system with
DAT105: Computer Architecture
Study Period 2, 2009
Chapter 1: Fundamentals of Computer Design
Department of Computer Science and Engineering
November 05, 2009
DAT105: Computer Architecture
Study Period 2, 2009
Goals: To understand
Installing SimpleScalar using SSH Secure Shell Client
This document is a guide to installing SimpleScalar on any of the unix machines you have been
given access to. You can access any of the unix machines using SSH secure shell software which
and InstructionLevel Parallelism
Sir, there is no second.
Dialog between two observers of the sailing race later named
The Americas Cup and run every few years.
This quote was the inspiration for J
Big Data Means Big Business
Introduction by Paul Taylor, Editor of the Financial Times The Connected Business
Big Data - extracting useful information from the huge volumes of structured and unstructured
data generated in a connected, digital world - have
CS 515 Mobile and Wireless Networking
CS 515 - Mobile and Wireless Networking
Homework 1 Solutions
Assignment Date: Oct 16, 2002, Wednesday
You may benefit from the following tools if you wish:
A scientific calculator
A function plotter like m
Instruction Level Parallelism
Instruction-Level Parallelism (ILP)
Instruction-Level Parallelism (ILP): overlap
the execution of instructions to improve
2 approaches to exploit ILP:
Basic Block (BB) ILP is quite small
BB: a straight-line
(6) Improving Cache Performance
[Adapted from Mary Jane Irwins slides (PSU)]
Measuring Cache Performance
Assuming cache hit costs are included as part of the
normal CPU execution cycle, then
CPU time = IC CPI CC
= IC (CPIideal + Memory-stall cycle
The Schemes and Performances of
Dynamic Branch predictors
The techniques of Instruction Level Parallelism (ILP) and pipeline have been used well to
speed up the execution of instructions. The conditional branches are the critical
Objective Getting Started with SimpleScalar Tool Set
Based on the manual by Todd Austin, University of Wisconsin
Get you acquainted with SimpleScalar tool set
Originally created by Rong Ge Department of Computer Science University of South Carolina Edited
What are the three main purposes of an operating system?
The three main puropses are:
To provide an environment for a computer user to execute programs
on computer hardware in a convenient and efcient
Software and Hardware for Data Analysis,
Pattern Recognition, NN and Image
Artificial Neural Networks Lab: Java applets and GIF-animation
DemoGNG Java demo on competitive learning
Java Applets for Neural Network and Artificial Life