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

What is meant by opening a data file, What is meant by opening a data file ...

What is meant by opening a data file A data file is a file that can be read from or written to. Data files are particularly useful when large amounts of data are involved. Each

Hardware required for superscalar processing, Q. Hardware required for supe...

Q. Hardware required for superscalar processing? For applying superscalar processing a number of special hardware should be offered that is discussed below: • The necessity

Explain the major consideration of laptop computers, Explain the major cons...

Explain the major consideration of laptop One of the major considerations when buying a laptop is battery life. This can rely on a number of things though one major factor is p

How does multiplexer know which line to select, How does multiplexer know w...

How does multiplexer know which line to select? This is managed by select lines. The select lines provide communication among different components of a computer. Now let's see

State the relative addressing, State the Relative addressing The locati...

State the Relative addressing The location of data is specified relative to current value of the program counter. This is helpful for specifying location of data which is given

Editor - tools necessary for assembly language programming, Q. Editor - Too...

Q. Editor - Tools necessary for assembly language programming? The editor is a program which allows the user to enter and modify as well as store a group of instructions or tex

Explain about the term- video conferencing, Video Conferencing Video co...

Video Conferencing Video conferencing continues to grow in popularity. Why is this? Some reasons are listed below: - Communication links are now much faster thus sound quali

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

Can we call reports from interactive reporting lists, Can we call reports ...

Can we call reports and transactions from interactive reporting lists? Yes.  It also permits you to call transactions or other reports from lists.  These programs then use val

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