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

Computers, Computers One of the most  important invention in the desig...

Computers One of the most  important invention in the design of digital  circuits  is that  of the general- purpose "stored program" computer or device. Computers are a partic

Outline the five main steps in the web design process, QUESTION (a) Out...

QUESTION (a) Outline the five main steps in the Web Design Process (b) Draw an annotated diagram explaining how data is transmitted to web servers during a standard form sub

What is a signaling protocol, QUESTION (a) How VoIP Works and how VoIP ...

QUESTION (a) How VoIP Works and how VoIP helps today's business? (b) What is a signaling protocol? Explain about SIP components and their key benefits (c) What is IPTV? L

Create a flowchart that displays the student''s avera, Ask questiCreate a f...

Ask questiCreate a flowchart that displays the student''s average score for three quizzes. + Assume that there are 3 sections each having 5 students + The only valid number to be

What are the tasks of ALU and their subcomponents, ALU’s tasks and their s...

ALU’s tasks and their suitable subcomponents: Addition and subtraction these two tasks are carried out by constructs of logic gates, such as half adders and full adders. While they

Pipelining, tellme the types of pipelining

tellme the types of pipelining

Exploitation of parallelism, Exploitation of Parallelism Similar calcul...

Exploitation of Parallelism Similar calculations have of course been a subject of dynamic research in computer technology for the past several years. Whereas parallelism within

Binary codes, Binary Codes: We have seen earlier that digital computer...

Binary Codes: We have seen earlier that digital computers use signals that have two distinct values and there exists a direct analogy between binary signals and binary digits.

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