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

Why assembly language is good?, Because it is enormously low level, assembl...

Because it is enormously low level, assembly language can be optimized enormously well. Therefore assembly language is used where the extreme performance is needed for applications

Explain briefly about das, Question 1 What is Content Addressable Storage?...

Question 1 What is Content Addressable Storage? Explain the elements of Content Addressable Storage Question 2 Explain briefly about DAS Question 3 Explain about N

Memory, Memory The memory unit is used for the storage of binary coded ...

Memory The memory unit is used for the storage of binary coded information. Information consists of instructions and data where: • Instructions are the coded pieces of infor

Inside earth, What are two types of evidence geologists use to learn about ...

What are two types of evidence geologists use to learn about Earth''s interior.?

Assembly, can you help me to do my assembly program homework

can you help me to do my assembly program homework

Advantages and Disadvantages of Threads over Multi processes, Advantages:- ...

Advantages:- • Sharing Treads permit the sharing of a lot resources that cannot be shared in process, for instance, sharing code section, data section, Operating System resource

Internal storage, Internal Storage: Internal storage is also known as ...

Internal Storage: Internal storage is also known as main, primary, or (for historical reasons) core storage, or, memory. It is used to hold those instructions and data require

Explain Debug program in assembly language , To make a program in assemble...

To make a program in assembler two choices exist, the earliest one is to use the TASM or Turbo Assembler, of Borland, and the next one is to use the debugger, generally we use this

Defining micro-operations, Problem 1. What are Micro-operations? Explai...

Problem 1. What are Micro-operations? Explain Micro operations of the Fetch cycle. Defining Micro-operations Its explanation of the fetch cycle 2. Differen

What is computer, how to use computer and how we can manage it

how to use computer and how we can manage it

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