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

System deadlock in shared programme structures, System Deadlock A dead...

System Deadlock A deadlock refers to the situation when simultaneous processes are holding resources and preventing each other from completing their implementation. The fol

Compare delays in packet switching and circuit switching, In this question,...

In this question, you will compare delays in packet switching (i.e. in IP networks), in circuit switching (i.e. in PSTN telephony) and in virtual circuit packet switching (i.e. in

Why is the authentication and key agreement of 3gpp weak, Question 1: a...

Question 1: a) How is the four-way exchange employed for mutual authentication in WPA/RSN? b) Elaborate on how inquiry attacks and traffic monitoring attacks can be u

Show the process of mail delivery, Q. Show the process of Mail Delivery? ...

Q. Show the process of Mail Delivery? Mail Delivery -Consists of three stages -First stage - email goes from user agent to local server, where it is stored until it ma

Determine three features of igrp, GRP uses a composite metric complete up o...

GRP uses a composite metric complete up of bandwidth and delay by default, it updates each 60 Seconds and will trigger an update if the topology changes.

How a token ring networks allows sharing of bandwidth, Question: (a) E...

Question: (a) Explain how a Token Ring networks allows sharing of bandwidth (access control). (b) (i) CSMA/CD is not appropriate for wireless communication. Explain wh

What is an object server in client server environment, With an object serve...

With an object server, the Client/Server application is written as a set of communicating objects. Client object commune with server objects using an Object Request Broker (ORB). T

Write examples of the transport layer, Example of transport layer are:- ...

Example of transport layer are:- a) TCP is connection oriented. b) UDP is connectionless

Process of securing an intranet, Process of Securing an Intranet Secur...

Process of Securing an Intranet Securing an Intranet is not a simple task. Mere installation of firewall hardware and software would not help the Intranet to protect itself. P

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