Loop level-levels of parallel processing, Computer Engineering

Assignment Help:

Loop Level

At this level, repeated loop iterations are the applicants for parallel execution. However, data dependencies among subsequent iterations may limit parallel execution of instructions at loop level. There is a lot of scale for parallel execution at loop level.

Ex: In the following loop in C language, for (i=0; i <= n; i++)

A(i) = B(i)+ C(i)

Each of the instruction A(i) =B(i)+C(i) can be implemented by different processing elements supplied  there are at least n processing elements. But, the instructions in the loop:

for ( J=0, J<= n, J++) A(J) = A(J-1) + B(J)

Cannot be implemented parallel as A(J) is data dependent on A(J-1).  This means that previous to exploiting the loop level parallelism the data dependencies have to be checked:

 


Related Discussions:- Loop level-levels of parallel processing

Why some languages are not decidable, Why some languages are not decidable ...

Why some languages are not decidable or even Turing - recognizable?  The  reason  that  there  are  uncountable  many  languages  yet  only  countably many  Turing  machines.

Explain non-uniform memory access model (numa), Non-Uniform Memory Access M...

Non-Uniform Memory Access Model (NUMA) In shared memory multiprocessor systems, local memories are able to be connected with every processor. The collection of all local

Explain flash devices, Explain Flash devices It is possible to read the...

Explain Flash devices It is possible to read the contents of a one cell, but it is only possible to write an whole block of cells Greater density which leads to superior cap

What is an advantage of executing a process in background, What is an advan...

What is an advantage of executing a process in background? The most common reason to put a process in the background is to permit you to do something else interactively without

Er diagrams, how can I draw er diagram for sell & storage section of a drug...

how can I draw er diagram for sell & storage section of a drugstore?

Define the types programmable logic devices?, Define the types Programmable...

Define the types Programmable logic devices? There are mostly three types PLDs. These are vary in the placement of fuses in the AND- OR array. 1. ROM- It has fixed AND array

What is the relationship between clipping and repainting, When a window is ...

When a window is repainted by the AWT painting thread, it sets the clipping regions to the area of the window that needs repainting.

What is analysis iteration, Analysis Iteration   To understand any prob...

Analysis Iteration   To understand any problem completely you have to repeat task which implies that analysis requires repetition. First, just get overview of problem, make a r

How are interrupt handled by the operating system, How are interrupt hand...

How are interrupt handled by the operating system? The fundamental interrupt mechanism works as follows: The CPU hardware has wire called the interrupt-request line which

Name the software required to run video conferencing, Name The software req...

Name The software required to run video conferencing The software and hardware required to run video conferencing is very sophisticated. Apart from obvious items (that is large

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