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

ATM is an example of which topology?, ATM is an example of? ATM is illu...

ATM is an example of? ATM is illustration of Star topology.

Operating system., what is the minimum number of page faults for an optimal...

what is the minimum number of page faults for an optimal page replacement strategy?

ECS, what is ecs?

what is ecs?

Explain about the term false path, Explain about the term false path? How i...

Explain about the term false path? How it find out in circuit? What the effect of false path in circuit? By timing all the paths into the circuit the timing analyzer can find o

E-r diagrams, for ticket reservation in trains for payroll processing for i...

for ticket reservation in trains for payroll processing for insurance database

Explain about the non-repudiation, Explain about the non-repudiation? ...

Explain about the non-repudiation? Non Repudiation: Assurance which the sender is provided along with proof of delivery and which the recipient is given along with proof

What are the advantages of electronic payment system, What are the advantag...

What are the advantages of electronic payment system? Advantages of the electronic payment system are illustrated below: This gives good security schemes. Four important sec

Do we require an x server to run in batch mode for gimp, Yes, you have to h...

Yes, you have to have some form of X server (unless you're running Windows, of course). It requires an X server for image processing, and for font manipulation. Though, if you wish

Convergence mean with respect to e-commerce, What does the term convergence...

What does the term convergence mean with respect to E-commerce? Convergence with respect to e-commerce   The ability to leverage and integrate the several data sources and

What is telnet, Telnet It is a terminal emulation program for TCP/IP ne...

Telnet It is a terminal emulation program for TCP/IP networks like as the Internet. The Telnet program runs on your computer and attaches your PC to a server on the network. On

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