Why interrupt can be used, Operating System

Assignment Help:

Why interrupt can be used?

The majority of the different parts of the PC need to send information to and from the processor and they expect to be able to get the processor's attention when they require to doing this. The processor has to balance the information transfers it gets from different parts of the machine and ensure they are handled in an organized fashion. There are two essential ways that the processor could do this:

  • Polling: The processor could acquire turns going to each device and asking if they have anything they require it to do. This is called as polling the devices. In a few situations in the computer world this technique is used, though it is not used by the processor in a PC for a couple of basic reasons. One reason is that it is wasteful obtainable around to all the devices constantly asking if they need the attention of the CPU wastes cycles that the processor could be doing something useful. This is particularly true for the reason that in most cases the answer will be "no". One more reason is that different devices need the processor's attention at differing rates the mouse wants attention far less frequently than say the hard disk (when it is actively transferring data).

 

  • Interrupting: The other way that the processor is able to handle information transfers is to let the devices request them when they need its attention. This is the foundation for the use of interrupts. When a device has data to transfer it produce an interrupt that says I need your attention now please. The processor after that stops what it is doing and deals with the device that requested its attention. It actually is able to handle many such requests at a time using a priority level for every to decide which to handle first.

 


Related Discussions:- Why interrupt can be used

Concepts of an address - data and control bus, Let us consider the operatio...

Let us consider the operation of the EPROM device in more detail. Consider the pining details below again   Before we examine the interface means of the EPROM, it is worth

Describe demand-paged environment, Q. Which of the subsequent programming ...

Q. Which of the subsequent programming techniques and structures are good for a demand-paged environment? Which aren't good? Describe your answers. a. Stack b. Hashed symbol

What is micro-kernel?, Question 1 What is Micro-kernel? What are the benef...

Question 1 What is Micro-kernel? What are the benefits of Micro-kernel? Question 2 Explain seven state process models used for OS with necessary diagram. Differentiate betwee

What happens when you execute a program in unix, When you run a program on ...

When you run a program on your UNIX system, the system prepares a special environment for that program. This environment owns everything needed for the system to execute the progra

Monolithic, What is monolithic and its diagram

What is monolithic and its diagram

State critical section problem, State critical section problem? Discuss thr...

State critical section problem? Discuss three solutions to solve the critical section problem. C-S Problem:- n processes all competing to use some shared data Every

Operation management, #question After working for 30 years, Ramjee Somjee D...

#question After working for 30 years, Ramjee Somjee Dutt opted for VRS and started a courier company and did very well in the first four years. He was now looking for expansion of

Managing outside communication, Problem: Managing Outside Communication...

Problem: Managing Outside Communication. a. What is the principal action we use when communicating through a web browser? b. Give an example of how to preaddress an email

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