Operating system problems, computer science, Basic Computer Science

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

Software engineering, Brief Define the Phases of Waterfall Model

Brief Define the Phases of Waterfall Model

Electronic digital, Design a BCD to excess 3 code converter using minimum n...

Design a BCD to excess 3 code converter using minimum number of NAND gates.

Define internet and explain its working, Question 1 Define Internet and ex...

Question 1 Define Internet and explain its working Question 2 Explain page format specifiers and page content specifiers of XSL-FO Question 3 Write a note on HTML

Block diagram of digital computer, Block diagram of digital computer: ...

Block diagram of digital computer: The general pattern of computer architecture has remained unchanged over the last four decades or so. It has a single processor, which accep

Telecommunication protocols, TELECOMMUNICATION PROTOCOLS: The two majo...

TELECOMMUNICATION PROTOCOLS: The two major components relating to a WAN are the Protocol and the Media. The media are the actual path ways that the protocol travels on. The ne

Graphical bulleted slides, Here are the more specific requirements and the ...

Here are the more specific requirements and the related points - use the below as a check-off list when you make your presentation. Please note . . . many of the requirements are

Files, definition of file operations

definition of file operations

CAI, what is CAI? explain its pit falls.

what is CAI? explain its pit falls.

What is packet switching? explain, Question 1 What are the five subscriber...

Question 1 What are the five subscriber-related signaling functions performed by the operator? Question 2 Compare Microprogrammed control and Hard-wired control Que

Data communication , (iv) Suppose that the TCP entity receives a 1.5 megaby...

(iv) Suppose that the TCP entity receives a 1.5 megabyte file from the application layer and that the IP layer is willing to carry blocks of maximum size 1500 bytes. Calculate the

Write Your Message!

Name

Email id

Message

Verfication Code

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!

Submit Assignment

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