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

What are packages, What are packages? Package is a group of elements (c...

What are packages? Package is a group of elements (classes, generalizations, associations and lesser packages) with a common theme. Package partitions a model making it simpler

Explain essential loop in process scheduling, Explain essential loop in Pro...

Explain essential loop in Process Scheduling . The complex part of scheduling is to balance policy enforcement along with resource optimization so as to pick the best job to run

Fitness function - canonical genetic algorithm, Fitness function - canonica...

Fitness function - canonical genetic algorithm: Conversely the fitness function will use an evaluation function to calculate a value of worth for the individual accordingly th

Benefit of digital versatile disk read only memory, Q. Benefit of digital v...

Q. Benefit of digital versatile disk read only memory? The main benefit of having CAV is that individual blocks of data can be accessed at semi-random mode. So head can be move

What is switched mode power supply, Q. What is Switched Mode Power Supply? ...

Q. What is Switched Mode Power Supply? SMPS is the unit into which electric supply from the mains is connected to your PC and this supplies DC to internal circuits. It is more

Determine the equivalent hexadecimal form of decimal number, Solve the equa...

Solve the equation 65.535 10 = X 16 Ans. In order to get X, convert the Decimal number 65.535 in its equal Hexadecimal form. So first taking 65 the integer part to convert in i

Create a factory function and constructor, 1) This project will use an acco...

1) This project will use an account class that has the members: string account_code; string first_name; string last_name; double balance; Provide a constructor that

Is it possible to decrease clock skew to zero, Is it possible to decrease c...

Is it possible to decrease clock skew to zero? Describe your answer? Even if there are clock layout strategies (H-tree) which can into theory reduce clock skew to zero by havi

Data structures.., in asingle function declaration what is maximum no of st...

in asingle function declaration what is maximum no of statements that may be recursive calls

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