Show the programmes for parallel systems, Computer Engineering

Assignment Help:

Q. Show the Programmes for Parallel Systems?

Adding elements of an array using two processor    

 int sum, A[ n] ;  //shared variables                                                                                              

void main ( ){

                         int i ;

for (i=0; i

scanf ("%d",&A[i] );                                                                                                   

sum=0;                                                                                                                         

// now create process to be executed by processor P1                                                 

fork(1) add (A,n/2,n-1, sum); // process to add elements from index n/2 to -

1.sum is output variable          // now create process to be executed by processor

P0                                                                                           add (A,0,n/2-1,

sum);                                                                                                                             

join 1 ;                                                                                                                          

printf ("%d", sum); 

}                             

add (int A[ ], int lower, int upper, int sum)

{

int sum1=0, i;                   

for (i=lower; i<=upper; i++)                  

sum1=sum1+A[i];                                  

lock sum;                                                

sum=sum+sum1;                                    

unlock  sum ;                                         

}                              

In this program last half of array is passed to processor P1 that adds them. For the meantime processor P0 adds the first half of array. The variable sum is locked to avoid inconsistency.


Related Discussions:- Show the programmes for parallel systems

Program in java, Write a program to display grade message according to the ...

Write a program to display grade message according to the marks

Multi-threaded concurrency programming with threads, Your task is to implem...

Your task is to implement a memory manager that manages page reads and writes from multiple client threads. In the first programming task the memory manager keeps all the pages in

Difference between viewstate and sessionstate, What Is The Difference Betwe...

What Is The Difference Between ViewState and SessionState? View State persist the values of controls of certain page in the client (browser) when post back operation done. When

Elevation of the premature ventricular contraction, As spring approaches, y...

As spring approaches, your design firm has been tasked with designing a two-lane highway in rural Wyoming. The highway descends a hill, crosses a river, and must shift to a para

Functions for message passing, Functions for Message Passing: MPI proc...

Functions for Message Passing: MPI processes don't share memory space and one process can't directly access other process's variables. Therefore they need some form of communi

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

What are the basic functions of database utility, What are the basic functi...

What are the basic functions of Database utility? The basic features of database utility are: Make database objects. Remove database objects. Adjust database obj

What are attributes, What are Attributes?  Attributes are declarative ...

What are Attributes?  Attributes are declarative tags in code that insert additional metadata into an assembly. There exist two types of attributes in the .NET Framework: Pred

Bus master - computer architecture, Bus Master: In  computer system,  ...

Bus Master: In  computer system,  bus  mastering  is  a attribute  supported  by  various  bus  architectures  that  enables  a  device linked to the bus to initiate transacti

What is branch folding, What is branch folding? The instruction fetch u...

What is branch folding? The instruction fetch unit has implemented the branch instruction concurrently with the implementation of other instructions. This technique is referred

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