Why are high-speed memories required, Computer Engineering

Assignment Help:

Q. Why are high-speed memories required? Is the main memory not a high-speed memory?

The answer to second question is absolutely 'No' though why so? Then if memories are slower then how slow are they? On an average it has been found that operating speed of main memories lack by a factor of 5 to 10 than the speed of processors (like CPU or Input / Output Processors).

Additionally every instruction needs numerous memory accesses (it may range from 2 to 7 or even more sometimes). If an instruction needs even 2 memory accesses even then nearly 80% of time of executing an expression, processors waits for memory access.

The main question is what can we do to increase this processor-memory interface bandwidth? There are four potential answers to the question which are:

a)  Reduce memory access time; use a faster though costly technology for main memory. 

b) Access more words in a single memory access cycle which is in place of accessing one word from memory in a memory access cycle access more words.

c)  Insert a high-speed memory called as Cache between processor and main memory. 

d)  Use associative addressing in place of random access.


Related Discussions:- Why are high-speed memories required

Explain mdr and mar, Explain MDR and MAR. The data and address lines of...

Explain MDR and MAR. The data and address lines of the external memory bus linked to the internal processor bus by the memory data register, MDR and the memory address register

One pointer variable be subtracted from another, Under what conditions can ...

Under what conditions can one pointer variable be subtracted from another? Pointer subtraction isn't used very much, but can be handy to determine the distances between two arr

Why are high-speed memories required, Q. Why are high-speed memories requir...

Q. Why are high-speed memories required? Is the main memory not a high-speed memory? The answer to second question is absolutely 'No' though why so? Then if memories are slowe

Database management system, what would be the occupancy of each leaf node o...

what would be the occupancy of each leaf node of a B+ tree

Simple instruction formats, Simple instruction formats: RISC uses simpl...

Simple instruction formats: RISC uses simple instruction formats. Usually only one or a few instruction formats are used. In these machines instruction length is fixed and alig

Hard-disk acquisition, Problem (a) Forensic methodology consists of t...

Problem (a) Forensic methodology consists of three phases. Briefly explian these three phases. (b) Sometimes it's best not to perform hard-disk acquisition. Provide two

Explain a macro, Explain a macro Macro is a preprocessor directive, als...

Explain a macro Macro is a preprocessor directive, also called as macro definition takes the following general form:  #define identifier string

DLD, Construction of j-k using 4-bit shift register

Construction of j-k using 4-bit shift register

Process of interaction design, This unit starts by discussing the importanc...

This unit starts by discussing the importance of involving users in the interaction design process, explaining the reasons why user involvement can be useful, the different degrees

What do you mean by manual assembly, Q. What do you mean by Manual Assembly...

Q. What do you mean by Manual Assembly? It was an old method which required the programmer to translate every opcode in its numerical machine language representation by search

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