Shared Memory

Definition & Meaning

Last updated 4 month ago

What is Shared Memory?

itMyt Explains Shared Memory:

Shared reminiscence for Software Program is a sort of reminiscence that can be shared with the aid of a couple of applications or Methods with the motive of offering inter-Software verbal excHange or avoid redundant Data copies. This is an effective way of sharing or passing statistics as it eliminates the want to apply different process like Input/Output (I/O). One utility saves the Records in shared Memory, while any other utility may also use it whilst Discovered.

In the Context of Processors, shared memory is part of random get admission to memory (RAM) that may be Accessed through all of the processors in a multi-processor machine.

What Does Shared Memory Mean?

Shared reminiscence for software program is a way for special programs to communicate and pass data without Greater overhead from communications tactics. With shared reminiscence, one application writes to the shared reminiscence any inFormation it desires another software to receive.

For example, if Program A wants to deliver a listing to Program B, it saves the records in shared memory and marks it with a Semaphore or other Flagging gadget to Signal that it is ready to be examine through Program B.

When Program B reveals the report, it tests the semaphore to peer if it's far allowed to the touch that document. If allowed, then it does what it wishes to do to the document, places it in shared reminiscence or UPDATEs it. It also updates the semaphore, so that Program A knows that it need to take the report.

In phrases of Hardware, specifically Microprocessors, shared memory is a large Block of RAM used by a couple of processors. It is simple to software because all processors proportion the identical View of records, facilitating quicker communique. However, this will get complicated due to the fact processors Cache Memory for faster get entry to, which can result in problems like Cache Coherence.

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