Explain virtual memory, Computer Engineering

Assignment Help:

In a memory hierarchy system, data and programs are first stored in secondary or auxiliary memory. Program and its related data are brought in main memory for execution. What if the size of Memory needed for Program is more than the size of memory? Virtual memory is a idea used in some large computer systems which allow user to construct programs as though a large memory space were available, equal to total of secondary memory. Every address produced by CPU goes through an address mapping from so-called virtual address to a physical address in main memory. Virtual memory is employed to give programmers the illusion that they have a very large memory at their disposal although computer in fact has a relatively small main memory. A Virtual memory system offers a mechanism for translating program-generated addresses in correct main memory locations. This is done dynamically whereas programs are being executed in CPU. The translation or mapping is handled automatically by hardware through a mapping table.


Related Discussions:- Explain virtual memory

What is enctype, ENCTYPE="application/x-www-form-urlencoded" and in its pl...

ENCTYPE="application/x-www-form-urlencoded" and in its place use ENCTYPE="text/plain". The subsequent illustration displays a general form which includes some of the commo

Illustrate header section of a device driver, Q. Illustrate Header section ...

Q. Illustrate Header section of a device driver? Header comprises information which allows DOS to identify the driver. It also comprises pointers which allow it to chain to ot

Initialize new pvm processes, Q. Initialize new PVM processes? pvm_spa...

Q. Initialize new PVM processes? pvm_spawn( char *task, char **argv, int flag, char *where, int ntask, int *tids ) Initialize new PVM processes. Task a character st

Explain about algebraic simplification, Q. Explain about Algebraic Simplifi...

Q. Explain about Algebraic Simplification? We have already determined algebraic simplification of logic circuit. An algebraic expression can exist in SOP or POS forms.  Let's i

Shared memory model, In the shared-memory programming model, tasks share a ...

In the shared-memory programming model, tasks share a common address space, which they read and write asynchronously. Several mechanisms such as locks / semaphores may be used to c

Personal computer software, Personal Computer Software     The perso...

Personal Computer Software     The personal computer software market has burgeoned from the past decade. Spreadsheets, Word processing, computer graphics, database managemen

Microprocessor, can i get the comparison of microprocessors architecture?

can i get the comparison of microprocessors architecture?

Java, what is java?

what is java?

What are the central interfaces of the r/3 system, What are the central int...

What are the central interfaces of the R/3 system? There are three central interfaces:- Presentation Interface. Database Interface. Operating system Interface.

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