Multiple bus architecture - computer architecture, Computer Engineering

Assignment Help:

Multiple bus architecture:

One solution to the bandwidth restriction of a single bus is to simply add extra buses. Consider the architecture indicated in given figure that contains N processors, P1 P2 PN, each containing its own private cache, and all linked to a shared memory by B buses BB, B1, B2. The shared memory consists of M interleaved banks M1 M2,MM to permit simultaneous memory requests concurrent access to the shared memory. It ignores the loss in performance that happen if those accesses have to be serialized, which is the case when there is only 1 memory bank. Each processor is linked to every bus and so is each memory bank. When a processor requires accessing a specific bank, it has B buses from which to select. Therefore each processor- memory pair is linked by various redundant paths, which implies that the failure of 1 or more paths can, principally, be tolerated at the cost of some degradation in system performance.

In a multiple bus system many processors may try to access the shared memory simultaneously. To deal with this problem, a policy might be implemented that allocates the available buses to the processors making requests to memory. In particular case, the policy might deal with the case when the number of processors exceeds from the B. For performance point of view this allocation has to be performed by hardware arbiters which, as we will see, add significantly to the difficulty of the multiple bus interconnection networks.

PCout, R=B, MARin, Read, IncPC

  • WFMC
  • MDRoutB, R=B, IRin
  • R4out, R5outB, SelectA, Add, R6in, End.

389_Multiple bus architecture.png


Related Discussions:- Multiple bus architecture - computer architecture

Logical functions, Logical functions   We have discussed the If, 'While...

Logical functions   We have discussed the If, 'While and For' Statements, and have used expressions within our syntax i.e.           If ( expression)           Statement 1;

What are the different between hypertext hypermedia, What are the different...

What are the different between hypertext hypermedia? Hypertext is fundamentally the same like regular text; this can be stored, read or searched and edited along with a signifi

Illustrate the term extranet, Illustrate the term Extranet? Extranet:...

Illustrate the term Extranet? Extranet: Extranet is Extension of an Intranet that makes thelatter accessible to outside companies or individuals with or without an intran

Find out the correction to be applied in decimal adder, The correction to b...

The correction to be applied in decimal adder to the generated sum is ? Ans. 00110 is the generated sum when the correction to be applied in decimal adder. While the 4 bit su

Illustrate the text area, specifies a form field where user can enter large...

specifies a form field where user can enter large amounts of text. In most respects, works like an field. It can have a name as well as a def

Input - output devices using device controller, Q. Input - output Devices u...

Q. Input - output Devices using Device Controller? A device controller needs not to necessarily control a single device. It can typically control multiple I/O devices. It come

Principles of composition, PRINCIPLES OF COMPOSITION The principles of ...

PRINCIPLES OF COMPOSITION The principles of composition are the way that the elements of composition are used to achieve a particular purpose. Some of the main principles of co

Define in detail about the architecture, Define in detail about the Archite...

Define in detail about the Architecture Architecture is the set of resources visible to machine language programmer: Registers, the memory, data representations, instructions

Difference between static and dynamic ram, Static RAM: No refreshing, 6 to ...

Static RAM: No refreshing, 6 to 8 MOS transistors are needed to form one memory cell, Information stored as voltage level in a flip flop. Dynamic RAM: Refreshed periodically, 3

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