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

Whitney houston, contribution to afican American history

contribution to afican American history

Explain different protocols of internet, WEB TECHNOLOGY 1. Explain diff...

WEB TECHNOLOGY 1. Explain different protocols of internet. 2. Differentiate between DHTML and HTML. 3. What do you understand by Event-driven Programming? Classify differ

Show the parity check - performance, Q. Show the Parity Check - Performance...

Q. Show the Parity Check - Performance? Parity Check - Performance Is able to detect all single-bit errors Can as well detect burst errors if the total number of

Osi reference model - fundamentals of networks, OSI Reference  Model ...

OSI Reference  Model Normal 0 false false false EN-IN X-NONE X-NONE

What is dynamic host configuration protocol, How does dynamic host configur...

How does dynamic host configuration protocol aid in network administration? Instead of having to visit every client computer to configure a static IP address, the network admin

What is the mesh network, A network in which there is multiple network link...

A network in which there is multiple network links among computers to provide multiple paths for data to travel.

Explain pipeline processing, Pipeline Processing Pipelining is a scheme...

Pipeline Processing Pipelining is a scheme to realize, overlapped parallelism in the proposed way out of a problem on a digital computer in an economical way. To understand the

Illustrate the model for network security, Q. Illustrate the Model for Netw...

Q. Illustrate the Model for Network Security? - A message is transferred from one party (Principal) to another. - A logical information channel is founded between the t

The size of a broadcast domain, Which switching technology can decrease the...

Which switching technology can decrease the size of a broadcast domain? Ans) VLAN's are logical ways to break up a huge broadcast domain. To get from VLAN to VLAN you must ha

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