Operating system problems, computer science, Basic Computer Science

Operating system problems, computer science, Basic Computer Science

Assignment Help:

1. In discussing software algorithms for mutual exclusion, we noted that optimizing compilers and out-of-order execution by processors could invalidate most of these algorithms because such “optimization” does not take into account that the value of a shared variable can be changed by something other than the immediately evident code. This overly-simplistic characterization also happens with I/O devices, especially simple programmed I/O where data or control register contents changes as a result of the state of the device, not as a consequence of execution of processor instructions, as well as with clocks where the current time register changes continually. It also happens when DMA is used to input blocks of data, which is slightly more complex because the addresses whose value changes are not evident literally. What does this imply about device drivers?

Related Discussions:- Operating system problems, computer science

What is evaluating information system investments, 1. What is Evaluating In...

1. What is Evaluating Information System Investments? 2. Is IS evaluation different to evaluation of other investments? 3. What approaches are used to evaluate IS investments

Networking, what is computer topology .

what is computer topology .

Program planning (preparation of a flow chart), Program Planning (Preparati...

Program Planning (Preparation of a Flow Chart) A flow chart is a graphic method for indicating a proposed or actual solution to the problem. A flow chart shows the steps a comp

Python Strings and Python Lists, Python Strings: Strings in Python are rec...

Python Strings: Strings in Python are recognized as an adjacent set of characters in among quotation marks. Python permits for either pairs of single or double quotes. Subsets of s

ALP Program to find 10''s complement, I would like to know how to write a p...

I would like to know how to write a program for a 8086 microprocessor in ALP to find 10''s complement of a packed BCD number.

Spidering or web crawling, Spidering or Web crawling: Spider or Web c...

Spidering or Web crawling: Spider or Web crawler is a computer program that browses the web pages of WWW in a systematic, automated manner. Search Engines use spider for gett

What is a tool bar?, Question 1 Write short notes on ...

Question 1 Write short notes on (a) Office Automatics System (b) Transaction Processing System Question 2 What is a too

Excel, how to use excel..

how to use excel..

Rooted tree, Ask qu The figure below shows a rooted tree, 756_Find the hei...

Ask qu The figure below shows a rooted tree, 756_Find the height.png 1.1. Find the height/level of the tree as shown above?estion #Minimum 100 words accepted#

Introduction Assembly Language, This web page looks at assembly languages i...

This web page looks at assembly languages in a common method. Specific illustrations of addressing modes and instructions from a variety of processors are used to demonstrate the g

Write Your Message!

Name

Email id

Message

Verfication Code

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

Submit Assignment

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd