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

Duplicating processes, DUPLICATING PROCESSES : As we mentioned earlier dup...

DUPLICATING PROCESSES : As we mentioned earlier duplicating is a process whereby a master copy is prepared from which a large number of other copies are obtained with the help of

Connectives - first-order logic , Connectives - first-order logic: We ...

Connectives - first-order logic: We can string predicates all together in a sentence by using connectives into the same way to conduct that we did for propositional logic. We

Speed up factor, Remember, the value of α is between 0 and 1. Now, let us p...

Remember, the value of α is between 0 and 1. Now, let us put some values of α and compute the speed up factor for increasing values of number of processors.  We get that the S(N) k

What are assembly attributes, Attributes are declarative tags in code that ...

Attributes are declarative tags in code that put in additional metadata into an assembly.

Don''t care states, The conflict between too hot and too cold or too slow a...

The conflict between too hot and too cold or too slow and too fast can be resolved using don't care states. Don't care states are used when i) the state of the output is not

What is full trust, What is Full Trust? Your code is permitted to do an...

What is Full Trust? Your code is permitted to do anything in the framework, meaning that all (.Net) permissions are granted. The GAC has Full Trust because it's on the local HD

What is hashing, What is Hashing? Hashing: Hashing gives the direct acc...

What is Hashing? Hashing: Hashing gives the direct access of record from the file no matter where the record is in the file. This is possible with the help of a hashing functio

What is efi framework, The Extensible Firmware Interface (EFI) is a specifi...

The Extensible Firmware Interface (EFI) is a specification that defines a software interface among an operating system and platform firmware. EFI is intended as a significantly imp

What is datapool, A datapool is a source of variable test data that scripts...

A datapool is a source of variable test data that scripts can draw from during playback

Real time OS, what is the usuage of Real time Os

what is the usuage of Real time Os

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