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

Explain web cache, To satisfy client needs through proxy server and not thr...

To satisfy client needs through proxy server and not through main server, as some other user have already accessed that file and its copied to the proxy server, so next time a user

Technology partnerships, Technology Partnerships: Such agreements prov...

Technology Partnerships: Such agreements provide the consumer un-limited access to vendor's technology. Such contracts are typically multi-year in nature where the consumer pa

Stable marriage Problem, How to make a stale marriage program by implementi...

How to make a stale marriage program by implementing the Gale Shapley algorithm using Java program

Paid Website Usability Testers, Assess the reliability of data gathered via...

Assess the reliability of data gathered via paid Internet users. Describe and assess the evaluation method being used by the testing company, i.e., nonvisual and verbal recording o

Computer security, concepts and components of computer security

concepts and components of computer security

Date mining, I have assignment in Date mning can you help me

I have assignment in Date mning can you help me

Unix, How do I change file permissions? Every time I execute chmod commands...

How do I change file permissions? Every time I execute chmod commands it tells me permission denied.

Accessing folders and printers, Accessing Folders and Printers Accessi...

Accessing Folders and Printers Accessing folders, files and printers of another computer is as easy as accessing another computer. To access folders and printers of another c

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