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

Block diagram of computer, Input unit: These are used to read data and tran...

Input unit: These are used to read data and transfer to primary memory contained in CPU through keyboard or floppy disk or mouse etc. Central Processing Unit (CPU): This consists o

Algorithm and flowchart, Write an alogorithm to calculate the right angled ...

Write an alogorithm to calculate the right angled triangle

Operating System, variable partioning

variable partioning

Creating Navigational Buttons in Oracle, Need some help in creating custom ...

Need some help in creating custom forms navigational buttons in oracle 10g

Definition of User-Level Thread?, User-level threads apply in user-level li...

User-level threads apply in user-level libraries, before via systems calls, so thread switching does not require to call operating system and to cause interrupt to the kernel. Actu

Input devices of a digital computer, Input devices of a digital computer: ...

Input devices of a digital computer: Input devices are used to read the instructions and data to be processed and output devices display the results obtained after executing t

Hardware, Hardware Hardware includes the cable and a Hub/Switch that...

Hardware Hardware includes the cable and a Hub/Switch that will connect the participating computers together. Printers or any other peripherals connected to one computer can

Random reading and writing and Closing a fcb file, The 21H function and the...

The 21H function and the 22H function of the 21H interruption are the ones in charge of realizing the random readings and writings in that order. The random register number and the

Computerised systems, Computerised Systems : You would have realized by no...

Computerised Systems : You would have realized by now that computing systems are most useful for manipulating information. Any organisation and management of information basically

Briefly explain the stage and the timeline, Question 1 Briefly explain the...

Question 1 Briefly explain the Stage and the Timeline Question 2 What is Device Central? How it is useful for previewing mobile content? Question 3 Which are the f

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