Explain Not recently used page replacement algorithm, Computer Engineering

Assignment Help:

Not Recently Used Page Replacement Algorithm

The not recently used abbreviated as NRU page replacement algorithm works on the subsequent principle: while a page is referenced, a referenced bit is set for that page, marking it as referenced. Likewise, while a page is modified (written to), a modified bit is set.  At a specific fixed time interval, the clock interrupt triggers and clears the referenced bit of all the pages, thus only pages referenced in the current clock interval are marked with a referenced bit. When a page requires to be replaced, the operating system categorizes the pages into four classes:

a) Class 0: not referenced, not modified 
b) Class 1: not referenced, modified 
c) Class 2: referenced, not modified 
d) Class 3: referenced, modified.

The NRU (Not recently used) algorithm picks a random page from the lowest category for removal. 


Related Discussions:- Explain Not recently used page replacement algorithm

CONVERT NUMBER TO ALPHABET, HOW TO CONVERT THE NUMBER INTO ALPHABET USING C...

HOW TO CONVERT THE NUMBER INTO ALPHABET USING C/C++ PROGRAM

What are benefits and advantages of linq, Benefits and benefits of LINQ are...

Benefits and benefits of LINQ are: 1. Makes it simpler to transform data into objects. 2. A common syntax for all data. 3. Strongly typed code. 4. Provider integration.

How do you recognize the performance bottlenecks, Performance Bottlenecks c...

Performance Bottlenecks can be identified by using monitors. These monitors might be application server monitors, database server monitors, web server monitors and network monitors

What are the pros and cons of on-line documentation, Question 1: You wa...

Question 1: You want to perform the task of setting an alarm on your mobile phone. You can assume that the alarm option is accessible from the main menu of your phone. (a) P

Explain clearly the kuleshov experiment, Question: (a) Write a proposal...

Question: (a) Write a proposal for a 10-11 minutes movie of your choice with the expected content. (b) Explain clearly the "Kuleshov Experiment" (c) Give the checklist be

What are the authentication methods in .net, What are the authentication me...

What are the authentication methods in .NET?   1. WINDOWS AUTHENTICATION 2. FORMS AUTHENTICATION 3. PASSPORT AUTHENTICATION The authentication option for the ASP.N

What are difference between latches and flipflops, What are difference betw...

What are difference between latches and flipflops? Difference : Latches are level-sensitive, while, flipflops is edge sensitive. It means to say edge sensitive that O/p change

Prolog, Prolog: Still we can take our card game from the previous lect...

Prolog: Still we can take our card game from the previous lecture like a case study for the implementation of a logic-based expert system. So there the rules were: four cards

Database, how create database design for pharmacy by diagram and query

how create database design for pharmacy by diagram and query

Learning abilities of perceptrons - ann, Learning Abilities of Perceptrons ...

Learning Abilities of Perceptrons - Artificial intelligence Computational learning theory is the study of what concepts specific learning schemes (representation and method) ca

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