Example of structural hazards - computer architecture, Computer Engineering

Assignment Help:

Example of Structural hazards - computer architecture:

A machine has shared a single-memory pipeline for instructions and data. As a consequence, when an instruction which contains a data-memory reference (load), it will conflict with the instruction reference for a afterward instruction

(instr 3):

 

2043_Example of Structural hazards.png

 

To overcome from this problem, we stall the pipeline for 1 clock cycle when a data-memory access take place. The effect of the stall is in fact to occupy the resources for that instruction slot. The following table denoted how the stalls are in fact implemented.

 

2063_Example of Structural hazards1.png

 

2333_Example of Structural hazards2.png

Instr 1 suppose not to be data-memory reference (load or store), or else Instr 3 cannot begin execution for the similar reason as shown above.

To make simple the picture it is also commonly exposed like this:

2171_Example of Structural hazards3.png

Introducing stalls reduced performance as we discussed before.  Why, then, would the designer permit structural hazards? There are 2 reasons:

  • To reduce the latency of the unit. The smaller latency comes from the lack of pipeline registers that introduce overhead.
  • To reduce cost. For instance, machines that support an instruction and a cache both access every cycle (to stop the structural hazard of the above instance) need at least twice of the total memory.

 


Related Discussions:- Example of structural hazards - computer architecture

Research methods, Building on their knowledge of research methods and their...

Building on their knowledge of research methods and their interest in a particular aspect of information technology this assessment enables students to put this knowledge into prac

Different ways in which a thread can be cancelled, What are the different w...

What are the different ways in which a thread can be cancelled?  Cancellation of a target thread may occur in two different scenarios: Asynchronous cancellation: One thre

Illustrate about fifth generation electronic computers, Fifth Generation (1...

Fifth Generation (1984-1990) The advancement of the next generation of computer systems is characterized majorly by the acceptance of parallel processing.  Until this time para

What is microcomputers, Q. What is Microcomputers? Microcomputers have ...

Q. What is Microcomputers? Microcomputers have become a common part of everyday life. The cost ranging from a few hundred to about ten thousand dollars, today's 16- and 32-bi

Displaying a number, Displaying a number Supposing that two digit num...

Displaying a number Supposing that two digit number 59 is stored as number 5 in BH and number 9 in BL to convert them to equivalent ASCII we will add "0" to each one of them.

the three main components of linq, What are the three main components of L...

What are the three main components of LINQ or Language Integrated Query? Ans) 1. Standard Query Operators 2. Language Extensions 3. LINQ Providers

What do you mean by polynomial and exponential bounds, What do you mean by ...

What do you mean by polynomial and exponential bounds?   Bounds of the form nc for c greater than 0 .such a bound are known as polynomial bounds. Bounds of the form 2(n )  .suc

How the simulation is done, How the simulation is done Data is entered ...

How the simulation is done Data is entered into the computer and simulation is run. The below scenarios may be tried out: -  Timing of lights varied to see how traffic flow

How do you traverse a btree in backward in-order, Put the node in the right...

Put the node in the right subtree Then, Put the root  Put the node in the left subtree

How do the registers help in instruction execution, Q. How do the registers...

Q. How do the registers help in instruction execution? We will discuss this in following steps: Step 1: First step of instruction execution is to fetch instruction which

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