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

Search in problem solving-artificial intelligence, Search in Problem Solvin...

Search in Problem Solving: If Artificial intelligence I may inform the other sciences about anything, it is about problem solving and, in specific, how to find solutions to pro

Advantages of computerized record-keeping, Advantages of Computerized Reco...

Advantages of Computerized Record-keeping Less manpower is required for upkeep.  Recording, storing, and retrieving are all much faster: easier and with little practice

Describe 3 components of a pattern, QUESTION (a) Compare the adapter pa...

QUESTION (a) Compare the adapter pattern with the façade and decorator patterns. (b) Illustrate a two-way adapter pattern. (c) Describe 3 components of a pattern. (d)

Electronic transmission frequency, Electronic  transmission Frequency: ...

Electronic  transmission Frequency: Frequency is the rate at which a wave or cycle alternates between high and low (analog mode) or on and off (digital mode). For example, the

Applications software, Applications Software: General aspects on appli...

Applications Software: General aspects on applications software. Applications software is the program that allow the user to get the required work done. In other words, applic

Counters and registers, design a synchronous, recycling, MOD-12 counter wit...

design a synchronous, recycling, MOD-12 counter with D FF''s. Use the states 0000 through 1011 in the counter.

Introduction to Computer and Programming Concept, Classify computer systems...

Classify computer systems according to capacity. How they are different from computers according to the classification of technology. Provide comparative study also.

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

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