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

10, constant key use for in calculator

constant key use for in calculator

Unix, Shell Scriptiong

Shell Scriptiong

C program , write a c program of minimum shelf

write a c program of minimum shelf

Project of interactive powerpoint in human computer , Hi There, can you h...

Hi There, can you help me with my small project please, i have sent it yesterday and you dont replay. can you please ethir lem me know you can do it or no Regrads Meshari

Distinguish between buffering and caching, QUESTION (a) Describe what y...

QUESTION (a) Describe what you understand by (i) "openness" and (ii) "Scalability" of a distributed system (b)What is the role of middleware in a distributed system? (c)

Use triggers to maintain referential integrity, At times, Brewbean''s has c...

At times, Brewbean''s has changed the id number for existing products. In the past, they have had to add a new product row with the new id to the BB_PRODUCT table, modify all the c

E - R diagram, draw the e r diagram for irctc rail ticket reservation onlin...

draw the e r diagram for irctc rail ticket reservation online

Qbasic, write a program of circle of any colour

write a program of circle of any colour

CAI, What is CAI? Explain its pitfalls.

What is CAI? Explain its pitfalls.

Constant bit rate atm theory, For the connections that request a static amo...

For the connections that request a static amount of bandwidth that is continuously available during the connection lifetime. Is intended to support real time applications requiring

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