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

Memory hierarchy, Memory hierarchy: There is another type of high spee...

Memory hierarchy: There is another type of high speed memory, known as Cache memory, which is used to increase the speed of processing by making current programs and data avai

Rooted tree, Ask qu The figure below shows a rooted tree, 756_Find the hei...

Ask qu The figure below shows a rooted tree, 756_Find the height.png 1.1. Find the height/level of the tree as shown above?estion #Minimum 100 words accepted#

How to Open a FCB files?, Opening files 0FH function is used to open an F...

Opening files 0FH function is used to open an FCB file the 21H interruption. The element, the name and extension of the file must be initialized previous to opening it. The DX regi

Numerical data , i don''t understand how to create a program using double, ...

i don''t understand how to create a program using double, int, float, short etc

Input/output (i/o) unit, Input/output (I/o) unit: This unit provides th...

Input/output (I/o) unit: This unit provides the interface between the computer and the computer peripherals. A computer peripheral is any unit, which is attached to, but is no

Comments in Python, A hash sign (#) that is not within a string literal beg...

A hash sign (#) that is not within a string literal begins a comment. All characters later than the # and up to the physical line end are division of the comment, and the Python in

Explain FDM : Frequency Division Multiplexing, Frequency Division Multiplex...

Frequency Division Multiplexing : FDM is an analog technique that is applied when he bandwidth of link is greater than the combined bandwidth of the signals to be transmitted. a

Find job, I want assignment writingjob

I want assignment writingjob

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