Paged virtual memory - computer architecture, Computer Engineering

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.

 

 

Posted Date: 10/13/2012 5:35:10 AM | Location : United States







Related Discussions:- Paged virtual memory - computer architecture, Assignment Help, Ask Question on Paged virtual memory - computer architecture, Get Answer, Expert's Help, Paged virtual memory - computer architecture Discussions

Write discussion on Paged virtual memory - computer architecture
Your posts are moderated
Related Questions
Role of Internet, Intranet and extranet in e-business The following information activities are carried out in many business: 1.  Selling of raw materials 2.  Advertising o

What is the advantage of dividing an email address into two parts? The division of an e-mail address in two parts is significant since it achieve two objectives. First, the div

Mobile cameras are characteristically low-resolution Digital cameras integrated in mobile set. Photographs are characteristically only good enough to show on low resolution mobile

What are the types of electronic payment system? Types of the electronic payment system are as given below: The most Internet payment way for Business to Customer is credit

how to breadboARD THE 4 BIT COMPARATOR

Address symbol table is generated by the  (A) memory management software.  (B) assembler.  (C) match logic of associative memory.   (D) generated by operating system

Q. Explain salient points about indirect addressing? A number of salient points about this scheme are:  In this addressing scheme effective address EA and contents of th

Processors can broadly be seperated into the categories of: CISC, RISC, hybrid, and special purpose.

Define the term web service with example. A web service is an application that operate over a network-typically, over the Internet. Most typically, a web service is an API that

The most common type of non-volatile memory is the ROM device. This device is read only and the data is masked into the chip during manufacture. Variations of the ROM are one off p