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

Give difference between assembler and compiler, Give difference between ass...

Give difference between assembler and compiler. Assembler: It is the translator for an assembly language of computer. An assembly language is a low-level programming language

Hardware required for superscalar processing, Q. Hardware required for supe...

Q. Hardware required for superscalar processing? For applying superscalar processing a number of special hardware should be offered that is discussed below: • The necessity

What is a mutable member, One that can be modified by the class even when t...

One that can be modified by the class even when the object of the class or the member function doing the modification is const.

Cse 320, Explain the functionality of the quadrant approach in the Spiral M...

Explain the functionality of the quadrant approach in the Spiral Model ?

Granularity-concept of parallel execution and concurrent , Granularity ...

Granularity Granularity refers to the quantity of computation done in parallel relative to the dimension of the entire program. In parallel computing, granularity is a qualitat

What are the digital certificates of hardware computations, What are the Di...

What are the Digital certificates of hardware computations Digital certificates are highly dependent on hardware computations, it is essential that mechanisms are evolved to i

What do you mean by lock synchronization, Q. What do you mean by Lock Synch...

Q. What do you mean by Lock Synchronization? Lock Synchronization: In this method contents of an atom are updated by requester process and sole access is granted before atomic

What are the requirements a dialog program must fulfill, What are the requi...

What are the requirements a dialog program must fulfill? A dialog program must fulfil the following requirements A user friendly user interface. - Format and consistency

What is shadow ram, Shadow RAM is a copy of Basic Input/Output Operating Sy...

Shadow RAM is a copy of Basic Input/Output Operating System (BIOS) routines from read-only memory (ROM) into a particular area of random access memory (RAM) so that they can be acc

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