What is memory interleaving, Computer Engineering

Q. What is Memory Interleaving?

In this scheme main memory is splitted in 'n' equal-size modules and CPU has separate Memory Base register and Memory Address Register for every memory module. Additionally CPU has 'n' instruction register and a memory access system.  When a program is loaded in main memory its successive instructions are stored in successive memory modules. For illustration if n=4 and four memory modules are M1, M2, M3, and M4 then 1st instruction would be stored in M1, 2nd in M2, 3rd in M3, 4th in M4, 5th in M1, 6th in M2 and so on.  Now at the time of execution of program when processor issues a memory fetch command then memory access system creates n consecutive memory addresses and places them in Memory Address Register in right order. A memory read command interprets all 'n' memory modules concurrently and retrieves 'n' consecutive instructions as well as loads them in the 'n' instruction registers. So every fetch for a new instruction results in loading of 'n' consecutive instructions in 'n' instruction registers of CPU. Because instructions are generally executed in sequence in which they were written, availability of N successive instructions in CPU avoids memory access after every instruction execution and total execution time speeds up. Apparently fetch successive instructions aren't useful when a branch instruction is encountered at the time of course of execution. This is because they need new set of 'n' successive instructions, overwriting previously stored instructions that were loaded however some of which weren't executed. The method is very efficient in minimising memory-processor speed mismatch since branch instructions don't take place often in a program.

Figure below explains memory interleaving architecture. The Figure shows a 4- way (n=4) interleaved memory system.

670_What is Memory Interleaving.png

Figure: A 4-way Interleaved Memory

Posted Date: 7/19/2013 2:35:07 AM | Location : United States







Related Discussions:- What is memory interleaving, Assignment Help, Ask Question on What is memory interleaving, Get Answer, Expert's Help, What is memory interleaving Discussions

Write discussion on What is memory interleaving
Your posts are moderated
Related Questions
What is a table cluster? A table cluster joins several logical tables in the ABAP/4 Dictionary.  Various logical rows from different cluster tables are brought together in a o

What are two methods of modifying SAP standard tables? Append Structures and Customizing Includes.

Write a program to mask bits D3D2D1D0 and to set bits D5D4 and to invert bits D7D6 of the AX register.

Implement the Y(A, B, C) = ∑(2,3,5,6) function using 4-to-1 multiplexer.   Ans. Y(A,B,C)=∑(2,3,5,6) Here we take B,C as the select bits also A as input. To select the input we can


What is most common biometrics? Explain in brief. The most common biometrics is as given below: Face geometry (Photo): The computer captures the picture of your face and m

In general what are the two ways in which one can retrieve data from tables? Using Select statements, Database Program.

Object oriented programming languages directly show the real life objects. The features of OOPL as inheritance, polymorphism, and encapsulation makes it strong.

Data Dependency It indicates to the situation in which two or more instructions share same data. The instructions in a program are able to be arranged based on relationship o

Define the state and instance of properties of object A state encompasses all properties of object along with values of each of these properties. An instance is a concr