Example programmes for parallel systems-adding element, Computer Networking

Assignment Help:

Example Programmes for Parallel Systems

Now we shall complete this with the examples on shared memory programming.

Example 13: Adding elements of an array using two processor int sum, A[ n] ; //shared variables

void main ( ){

int i ;

for (i=0; i

// now create process to be implemented 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 implemented 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, the last half of the array is passed to processor P1 which adds them. Meanwhile processor P0 adds the first half of the array. The variable sum is locked to avoid inconsistency.


Related Discussions:- Example programmes for parallel systems-adding element

Advanced interface module and system bus, Advanced Interface Module (AIM) s...

Advanced Interface Module (AIM) socket This is an 100 pin internal socket. It is provide for plug in the Advance interface module card. Purpose of AIM card is concentrate in th

Network comp. architecture, Write discussion on Associative mapping - compu...

Write discussion on Associative mapping - computer architecture

Leased satellite channel, LEASED SATELLITE CHANNEL: It may span arbitr...

LEASED SATELLITE CHANNEL: It may span arbitrarily big distance. It is given in the figure below.   Figure Satellite connections are low bandwidth to protect cost

How intranets encourage integration of applications, How Intranets encourag...

How Intranets encourage integration of applications Intranets encourage integration of applications; such as the simple word processing application could be easily linked with

R-sat networks for pstn and stm v-sat network, S t d "B" 9 m C-BAND EARTH...

S t d "B" 9 m C-BAND EARTH STATION (2001)   This  Earth  Station  is  aligned  with  INTEL  SAT  IOR  66°  and  provide domestic connectivity. R-Sat (Regional Satellite) i

Ring token, what is logical ring maintenance and how does it work>?

what is logical ring maintenance and how does it work>?

Explain about domain name system, Q. Explain about Domain Name System? ...

Q. Explain about Domain Name System? -In the past, mapping of IP addresses was static using a host file -Impossible in today's dynamic environment -Domain Name System (DN

Internetworking, In spite of the incompatibilities among networks, research...

In spite of the incompatibilities among networks, researchers have devised a function that gives universal service among heterogeneous networks known 'internetworking'. It uses bot

Multithread web server, CSE4344 Computer Network Organization Project 1 Sim...

CSE4344 Computer Network Organization Project 1 Simple Web Server & Client Instructor: Sajib Datta Spring 2017 "What I cannot create, I do not understand." Richard P Feynman Object

Elaborate the term - database connectivity, Elaborate the term - Database C...

Elaborate the term - Database Connectivity Basic connectivity A number of database management systems are available today such as the Oracle, Sybase, Ingres, etc. Most

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