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

Explain high performance of instruction execution, Q. Explain High performa...

Q. Explain High performance of Instruction execution? High performance of Instruction execution: While mapping of HLL to machine instruction the compiler favours relatively sim

What a header script can specify in cgi, A header in CGI script can specify...

A header in CGI script can specify? A header into CGI script can give format of document and New location of perticular the document.

Logical database structure, It is not essential to maintain the Parent-Chil...

It is not essential to maintain the Parent-Child relationship among the tables in Logical Database Structure. False. One has to handle the Parent-Child relationship.

Explain in brief about compact disks, Explain in brief about Compact disks ...

Explain in brief about Compact disks (CD) These are an optical storage media that have basically taken over from floppy disk. Software is now generally supplied on a CD (in for

Limitation identified in amdahls law, Q. Limitation identified in Amdahls l...

Q. Limitation identified in Amdahls law? There is one main limitation identified in Amdahl's law. As said by Amdahl's law workload or problem size is forever fixed as well as n

Observations of high level language program, Q. Observations of High Level ...

Q. Observations of High Level Language Program? Observations Integer constants appeared nearly as frequently as structures or arrays. Most of the scalars were foun

Hardware required for superscalar processing, Q. Hardware required for supe...

Q. Hardware required for superscalar processing? For applying superscalar processing a number of special hardware should be offered that is discussed below: • The necessity

Explain the term- wireless technologyand broadband, Explain the term- Wirel...

Explain the term- Wireless Technologyand Broadband Wireless Technology (WiFi) and Broadband Most areas in the world now provide broadband instead of dial up for connectin

What are the input for uml development, What are the Input for UML developm...

What are the Input for UML development UML is an attempt to standardize artefacts of analysis and design consisting of semantic models, diagrams and syntactic notations. The fi

Explain in detail about first generation electronic computer, First Generat...

First Generation Electronic Computers (1937-1953) Three machines have been promoted at different times as first electronic computers. These machines used electronic switches

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