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

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.

ip address and port number at the remote host, How many TCP connections ar...

How many TCP connections are in the "Established" state? Contain relevant output. For one of the established TCP connections, what are the IP address and port number at the remote

What is optical character recognition, What is Optical character recognitio...

What is Optical character recognition (OCR)  Information on paper is automatically read by a scanner and is then processed/analysed by OCR software and stored in an electronic

Explain jk flip-flop using sr flip-flop, Q. Explain 4 bit Ripple counter wi...

Q. Explain 4 bit Ripple counter with necessary diagram. Q. Explain JK Master-slave Flip-flop with block diagram and logic design. Q. Explain JK flip-flop using SR flip-flop

Basic need of random access memory, Q. Basic need of Random Access Memory? ...

Q. Basic need of Random Access Memory? Main memory is Random access memory. It is generally organised as words of fixed length. Length of a word is termed as word length. Every

Define technique of improving priority of process wait queue, is a techniqu...

is a technique of improving the priority of process waiting in Queue for CPU allocation? Ageing is a technique of enhancing the priority of process waiting in Queue for CPU all

Why cyclomatic complexity is important, Why cyclomatic complexity is import...

Why cyclomatic complexity is important? Cyclomatic complexity is computed using a graph that verifies the control flow of the program. The nodes of the graph correspond to the

Graphics, what is bitmap and pixmap

what is bitmap and pixmap

Common problem with hill climbing, Common problem with Hill climbing: ...

Common problem with Hill climbing: An alternative way of justifying the problem is that the states are boards with 8 queens already on them, so an action is a movement of one

Explain properties of the webservice attribute, Question: (a) (i) Expl...

Question: (a) (i) Explain properties of the WebService attribute. (ii) Discuss three properties of the WebMethod attribute. (b) What are WSDL documents used for? (c)

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