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

Cryptography, Question 1 Consider the one-time pad encryption scheme to en...

Question 1 Consider the one-time pad encryption scheme to encrypt a 1-bit message m, and assume m is chosen with uniform distribution from message space M={0,1}. Let E1 be the eve

Cost of computer, If you have to consider the installation of communication...

If you have to consider the installation of communications packages, the same questions have to be asked. (a) Does the software and the modem support the necessary transmission

Explain the concept of linking and relocation, Question 1 Write an assembl...

Question 1 Write an assembly language program to find the highest among two numbers Question2 Draw and explain the internal architecture of 8085 briefly Question3 Explai

Discuss on browsers for cloud computing, Question 1 Discuss on "Platform a...

Question 1 Discuss on "Platform as a Service" Question 2 Write a note on Accounting Services Question 3 Explain the different Software clients Question 4 D

Multiprogramming, Multiprogramming Multiprogramming means capability of...

Multiprogramming Multiprogramming means capability of several programs to simultaneously occupy a portion of the computer’s memory and compete for central processor time. Th

Server, Server In a network, the resources of computers comprising net...

Server In a network, the resources of computers comprising network are usually shareable. In fact, one of the main objectives of networking is to make the computing resources

What are search engines, QUESTION 1 What are search engines? QUESTI...

QUESTION 1 What are search engines? QUESTION 2 Write short notes on the inverted file. QUESTION 3 Write short notes on: (i) Derivative indexing (also known a

Software, what factors might be significant in your decision

what factors might be significant in your decision

Control unit of the processor, Control Unit of the processor: The  Con...

Control Unit of the processor: The  Control Unit  of the processor is that unit which controls and coordinates the execution of instructions by the processor. It is responsibl

Write Your Message!

Captcha
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!

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