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Virtual memory - Wikipedia


In computing, virtual memory is a memory management technique that is implemented using .... If it is in real memory, the page table entry will contain the real memory address at which the page is s...

Virtual Memory


Initially, virtual memory meant the idea of using disk to extend RAM. .... That information is kept in another page table, which is indexed by the virtual page ( same as ... It's useful to keep it located in certain parts of RAM for just such a purpose.

What is virtual memory? - Definition from WhatIs.com - SearchStorage


Virtual memory is a feature of an operating system (OS) that allows a computer to compensate for shortages of physical memory by temporarily transferring ...

Physical Computer Memory and Virtual Memory - Data, Ram, Hard ...


Physical and virtual memory are forms of memory (internal storage of data). ... When information is needed in RAM, the exchanges system rapidly swaps blocks of ... of stored data to a virtual address maintained by the virtual-memory process.

CS110: Introduction to Computers - Uhaweb


A small set of basic input/output system instructions stored in ROM, which cause ... (based on configuration information stored in the computers' CMOS memory). ... Virtual memory is not as fast as RAM, because your computer takes longer to ... from memory located elsewhere on the motherboard (also called RAM cache or ...

linux - Where is the virtual memory stored on hard drive? - Unix ...


Mar 26, 2013 ... If a process wants to access a memory address that is not in physical memory, the OS outsources a page frame from physical memory to the ...

Virtual Memory: The Details


To implement virtual memory, it is necessary for the computer system to have ... assume that the application's first instruction accesses data stored at address 12374. ... that is in its address space, but is not currently located in the system's RAM. ... all processes, the operating system must track usage information for all ...

How Virtual Memory Works | HowStuffWorks


Learn about virtual memory, how your computer uses virtual memory and how ... to constantly swap information back and forth between RAM and the hard disk.

Virtual Memory - Computer Systems: A Programmer's Perspective


address space stored on disk, keeping only the active areas in main memory ... Virtual memory is one of the great ideas in computer systems. ..... You can monitor the number of page faults (and lots of other information) .... k, of contiguous virtual memory pages, and maps them to k arbitrary physical pages located anywhere.

Operating Systems: Virtual Memory - UIC Computer Science


However the entire process still had to be stored in memory somewhere. In practice ... The rest of the page table entry may either be blank or contain information about where to find the ... A free frame is located, possibly from a free- frame list.