Paged virtual memory - computer architecture, Computer Engineering

Assignment Help:

Paged virtual memory:

Mostly all implementations of virtual memory divide the virtual address space of an application program into pages; a page is a block that contains contiguous virtual memory addresses. Pages are generally at least 4K bytes in size, and systems with big virtual address ranges or big amounts of real memory (for example: RAM) generally use larger page sizes.

Page tables

Mostly all the implementations use page tables to translate the virtual addresses of application program into physical addresses (also referred to as "real addresses") used by the hardware to process instructions. Each entry in the page table have a mapping for a virtual page to either the real memory address at which the page is stored, or an pointer that the page is presently held in a disk file. (Although most of the system does, some systems cannot support use of a disk file for virtual memory.)

Systems can have 1 page table for the overall system or a distinct page table for each application. If there is only 1, different applications which are running at the one time share a single virtual address space, for example they use different parts of a single range of VA. Systems which are use multiple page tables provide multiple virtual address spaces - concurrent applications think they are utilizing the same range of VA, but their separate page tables redirect to different real addresses.

 

 


Related Discussions:- Paged virtual memory - computer architecture

Give explanation of common channel signalling, Explain Common channel signa...

Explain Common channel signalling. Common channel signalling: Signaling systems connection the variety of transmission systems, switching systems and subscriber equipments, i

Linux, Discuss the risks of having a single root user and how more limited ...

Discuss the risks of having a single root user and how more limited management abilities can be given to others users on Linux/UNIX systems

Give an example of shortest job next scheduling, Consider the following set...

Consider the following set of jobs with their arrival  times, execution time (in minutes), and deadlines. Job Ids Ar r ival Time E xecuti

Explain bernstein conditions for detection of parallelism, Bernstein Condit...

Bernstein Conditions for Detection of Parallelism For execution of a number of instructions or a block of instructions in parallel, it must be made certain that instructions ar

Basic definition of program, Q. Basic defination of program? A program ...

Q. Basic defination of program? A program generally consists of a set of instructions and data specifying the solution of a particular problem. Programs (and data) expressed in

Paged virtual memory - computer architecture, Paged virtual memory: Mo...

Paged virtual memory: Mostly all implementations of virtual memory divide the virtual address space of an application program into pages; a page is a block that contains conti

Instruction set architecture, Question (a) A 500 MHz Pentium III proce...

Question (a) A 500 MHz Pentium III processor takes 2 ms to run a program with 200,000 instructions. A 300 MHz UltraSparc processor takes 1.8 ms to run the same program with 23

List the properties which a hashing function should possess, List the prope...

List the properties which a hashing function should possess to ensure a good search performance. What approaches are adopted to handle collision? A hashing function h must poss

What is the function of an ip packet screening router, What is the function...

What is the function of an IP packet screening Router? Explain with the help of a diagram. Function of an IP Packet Screening Router: A screening router is the most fund

Write an xpath expression, Question: (a) Explain the five different t...

Question: (a) Explain the five different types of element content defined by DTDs. (b) Compare XML schema's against DTDs. (c) Consider the following two element decla

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