Explain optimal page replacement, Operating System

Assignment Help:

Optimal page replacement

An optimal page replacement algorithm has the least page fault rate of all algorithms. The algorithm states that a 'replace the page that will not be used for the longest period of time'.

The drawback of this algorithm is that it is very hard to execute as it requires future knowledge of the reference string.

Example Consider the reference string 1,2,3,4,3,1. Here 1,2,3 are inserted as normal however when 4 comes we replace 2 as it isn't used again.

 


Related Discussions:- Explain optimal page replacement

Protection, Can you please explain in easy words how input output protectio...

Can you please explain in easy words how input output protection works

Determine what a locality of reference entails, Locality of reference entai...

Locality of reference entails that the page reference being made by a process  Locality of reference entails that the page reference being made by a process is similarly to be

Prolog application, 1. Problem Domain You will be considering the Wumpus ...

1. Problem Domain You will be considering the Wumpus world introduced in Russell and Norvig (2009) Chapter 7. For this programming assignment you'll use Prolog's ability to do in

What are the various process scheduling concepts, What are the various proc...

What are the various process scheduling concepts? a) Scheduling queues with diagram b) Queuing diagram c) Schedulers d) Context switch with diagram

Interval between time of submission and completion of job, Interval among t...

Interval among the time of submission and completion of the job is known as                    Interval among the time of submission and completion of the job is known as Turn

What are the various scheduling criteria for cpu scheduling, What are the v...

What are the various scheduling criteria for CPU scheduling? The various scheduling criteria are CPU utilization

File management, five major activities on file management in operating syst...

five major activities on file management in operating system.? Explain it.?

Explain the general structure of a typical process, Explain the general str...

Explain the general structure of a typical process? There are basically four main sections through which each of the process has to pass through.The universal algorithm is:-

Tlb replacement algorithm, Suppose a logical address space is 1KB, and the ...

Suppose a logical address space is 1KB, and the page-size is 16 bytes. Assume no page is in the main memory for this process initially and the pure demand paging is used. Current f

Replacement algorithm for tlb, Consider the following C program where M, N,...

Consider the following C program where M, N, K are predefined constants. Assume int is 4 bytes. Suppose this program is run on a machine with 4KB page size and 32 TLB entries. Init

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