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

Output design, Discuss the factors considered during output design

Discuss the factors considered during output design

What is fragmentation? explain its significance, Question A What is fragme...

Question A What is fragmentation? Explain its significance Question B Briefly discuss the functions of transport layer Question C What is CIDR? Explain Question D W

Types of browsers, Types of Browsers: Line Mode Browsers : The initia...

Types of Browsers: Line Mode Browsers : The initial browsers were line mode text browsers. These browsers were simple and used to display text line by line. They used to prov

Provide a goms description of the procedure, Question : (a) You want to...

Question : (a) You want to perform the task of sending an e-mail message to three of your friends. You can assume that the email addresses, of the people you want to send the e

Multithreaded Programming in python, Running more than a few threads is lik...

Running more than a few threads is like running several different programs at the same time as, but with the following profits: • Multiple threads inside a process share the same d

Internet searching algorithm, Internet searching algorithm: Searching: Wh...

Internet searching algorithm: Searching: When a user enters a query into a search engine, the engine examines its index and provides a listing of best-matching web pages accordin

Algorithm implementation, Implementing the -Crochemore-Perrin algorithm Th...

Implementing the -Crochemore-Perrin algorithm The software must be functional, code must be clear and including comments and it must have a nice and decent user interface

Explain the concept of a transition graph, Question 1 Define the concept o...

Question 1 Define the concept of equivalence relation. Give atleast two examples of equivalence relation Question 2 Prove that a graph G is connected if and only if it has a

Security threats on internet, Security threats on internet:  The Inter...

Security threats on internet:  The Internet has many advantages; however, it also opens up security threat. In this section we just want to highlight some of the threats that

Theory of computation, I define a restricted form of TMs M as follows. Give...

I define a restricted form of TMs M as follows. Given any input x on the tape of M, the initial portion of the tape that holds x is read-only and one-way. That is, M cannot write o

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