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What (who) is shared memory - definition
Shared memory
![MMU]] of the CPU and the [[IOMMU]] of the GPU have an identical pageable virtual address space.](https://commons.wikimedia.org/wiki/Special:FilePath/MMU and IOMMU.svg?width=200 "MMU]] of the CPU and the [[IOMMU]] of the GPU have an identical pageable virtual address space.")
MEMORY THAT MAY BE SIMULTANEOUSLY ACCESSED BY MULTIPLE PROGRAMS WITH AN INTENT TO PROVIDE COMMUNICATION AMONG THEM OR AVOID REDUNDANT COPIES
Shared memory (interprocess communication); SHM (computer science); SHM (computing); Shared Memory; Universal Memory Architecture; Dev/shm; Shared memory programming; Shared Memory Architecture; Shared-memory architecture; Globally shared memory; Shared-memory; Shared-memory multiprocessor; Shared memory system; /dev/shm; Shared code; Shared data; Shared code segment; Shared data segment; Shared memory architecture
In computer science, shared memory is memory that may be simultaneously accessed by multiple programs with an intent to provide communication among them or avoid redundant copies. Shared memory is an efficient means of passing data between programs.
shared memory
MEMORY THAT MAY BE SIMULTANEOUSLY ACCESSED BY MULTIPLE PROGRAMS WITH AN INTENT TO PROVIDE COMMUNICATION AMONG THEM OR AVOID REDUNDANT COPIES
Shared memory (interprocess communication); SHM (computer science); SHM (computing); Shared Memory; Universal Memory Architecture; Dev/shm; Shared memory programming; Shared Memory Architecture; Shared-memory architecture; Globally shared memory; Shared-memory; Shared-memory multiprocessor; Shared memory system; /dev/shm; Shared code; Shared data; Shared code segment; Shared data segment; Shared memory architecture
1. Memory in a parallel computer, usually RAM, which can
be accessed by more than one processor, usually via a shared
bus or network.
It usually takes longer for a processor to access shared
memory than to access its own private memory because of
contention for the processor-to-memory connections and because
of other overheads associated with ensuring synchronised
access. Computers using shared memory usually have some kind
of local cache on each processor to reduce the number of
accesses to shared memory. This requires a {cache
consistency} protocol to ensure that one processor's cached
copy of a shared memory location is invalidated when another
processor writes to that location.
The alternative to shared memory is message passing where
all memory is private to some particular processor and
processors communicate by sending messages down special
links. This is usually slower than shared memory but it
avoids the problems of contention for memory and can be
implemented more cheaply.
2. Memory which can be access by more than one process in a
multitasking operating system with memory protection.
Some Unix variants, e.g. SunOS provide this kind of shared
memory.
Unix manual pages: shmop(2), shmctl(2), shmget(2).
(1994-10-20)
Shared universe
![Fawcett]] "universe".](https://commons.wikimedia.org/wiki/Special:FilePath/MasterComicsNo21.jpg?width=200 "Fawcett]] \"universe\".")
FICTIONAL UNIVERSE IN WHICH WORKS WRITTEN BY MULTIPLE WRITERS ARE SET
Shared world; Shared fictional universe; Combined universe; Shared Universe; List of shared universes; Cinematic universe; Shared uiniverse; Film universe; Television universe
A shared universe or shared world is a fictional universe from a set of creative works where more than one writer (or other artist) independently contributes a work that can stand alone but fits into the joint development of the storyline, characters, or world of the overall project. It is common in genres like science fiction.
Examples of use of shared memory
1. That, I guess, is what I am looking forward to tomorrow a shared memory of great occasions and great players that whichwill transcend the cruder tactics of the modern game.
2. "It is a shared memory site." More Infotech Headlines People who read this story also read Time Warner‘s AOL seeks technology, traffic 0'.12.05 Britons flock to online retail to avoid Xmas crush 0'.12.05 Yahoo undercuts Skype, telcos on voice call rates 08.12.05 Yahoo lets users answer each other’s questions 08.12.05 Microsoft, Google still vying for AOL linkup 07.12.05 Full Coverage Bihar Polls Save Bangalore SelectMumbai FloodsDay in PicsDiscovery in SpaceRam Temple TurmoilJustice for ImranaWimbledon 2005Advani‘s resignationBollywood icon: Sunil DuttSamrat Shah RukhOne Year of UPA RuleThe Great Indian DebateParveen Babi‘s DeathNRI NewsKanchi Seer‘s ArrestAmbani vs AmbaniGujarat RiotsJ–K MonitorIndia Pak TalksIndia–Aus SeriesIndia–Pak SeriesIslamabad SummitIndia Down UnderWar on IraqNE MonitorIndia–Pak Face OffPak Nuke LeakElections 2003 Del.icio.us provides a simple way for hundreds of thousands of Web users to share and categorize their favourite Web page bookmarks as Web pages.