Explain lru page replacement, Operating System

Assignment Help:

LRU page replacement

In slightest recently used page replacement algorithm we will replace that page that hasn't been used for the longest period of time. This is similar as an optimal page replacement algorithm looking backward in time. It is considered preferred as a good performer. 

There are two processes for implementation - stack and counter. Counter is the easiest to execute in which with every page entry there is a counter or logical clock. For every memory reference it is incremented. We reinstate the page with the smallest time value. In this overflow should be considered, in stack memory allocation when a page is referenced it is removed from the stack and put on top. For the reason that the entries may be in middle it is executing using doubly linked list.

Example Consider the string 1,2,3,4,3,2,1. In this 1, 2, 3 are inserted the same as normal as 4 comes it is entered in the position of 1. When 1 comes once more 4 is replaced as it is the least referenced.

 


Related Discussions:- Explain lru page replacement

Explain variable partitioning technique, VARIABLE PARTITIONING We can d...

VARIABLE PARTITIONING We can differ the partitions and change the location according to the size of the process. Here if a 10k process enters we are able to make a space of

Why do organisations need a structure, Problem 1: (a) The grouping of o...

Problem 1: (a) The grouping of organisational activities (usually into ‘departments' or larger ‘divisions') can be done in different ways. Outline 7 criteria which can be used

System structures, advantages and disadvantages of monolithic and layered a...

advantages and disadvantages of monolithic and layered approach

Can we call trap as an interrupt??, is there any difference between the tra...

is there any difference between the trap and interrupt??

Define the turn-around time of a user job, Define the “turn-around” time of...

Define the “turn-around” time of a user job Turn- around time is total time taken to execute the job.

Write a short note on the linux file systems, Question: (a) Red Hat Li...

Question: (a) Red Hat Linux is distributed under the Open Source agreement. Explain what you understand by Open Source distribution system. (b) Write a short note on the L

Caching name translations for computers, Q. Discuss the advantages as well ...

Q. Discuss the advantages as well as disadvantages of caching name translations for computers located in remote domains. Answer: There is a performance benefit to caching nam

Unix , A friend has promised to log in at a particular time. However, he ne...

A friend has promised to log in at a particular time. However, he needs to be contacted as soon as he logs in. The shell script checks after every minute whether he has logged in o

Explain the fork function, Explain the Fork Function Fork function caus...

Explain the Fork Function Fork function causes a new process to be created. The calling progress is duplicated as an exact copy (called the child process) that differs only in

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