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 collaboration, Question 1 What is Collaboration? Write down the ob...

Question 1 What is Collaboration? Write down the objectives of collaboration Question 2 What is proxy server? Write down the reasons for using proxy server Question

Execution of a machine instruction, Execution of a machine instruction: ...

Execution of a machine instruction: Execution of a machine instruction on modern processors involves a complex sequence of operations with multiple cycles. One instruction cyc

Message quality and quantity, Message Quality and Quantity: Quality of...

Message Quality and Quantity: Quality of transmission is a very important .consideration in telecommunication. Voice communication can use a narrow bandwidth, which means the

Output devices, Output devices: One of the most important output devic...

Output devices: One of the most important output devices in computer system is its screen commonly called monitor. It is an output device and displays all the programs and app

Explain the raster scan display system, Question 1 Explain boundary fill a...

Question 1 Explain boundary fill and flood fill polygon filling algorithm Question 2 Draw and explain the block diagram of typical workstation Question 3 Explain the ras

Wap and wml, what is charactersics of mobile computing

what is charactersics of mobile computing

Programs - programming language, Programs - programming language: Prog...

Programs - programming language: Programs to implement algorithms on the computer must be written in a language that the computer can understand. It is fruitful, therefore, to

OPERATING SYSTEM, WHAT IS MULTIPLE CONTIGUOUS VARIABLE PARTITIONING

WHAT IS MULTIPLE CONTIGUOUS VARIABLE PARTITIONING

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