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

Error correction in burst error correction, Q. Error Correction in Burst Er...

Q. Error Correction in Burst Error Correction? Error Correction-Burst Error Correction In its place of sending all the bits in a data unit together we can organize "N

Connection-oriented protocol, TCP is connection-oriented. Connection-orient...

TCP is connection-oriented. Connection-oriented is a kind of connection established between the source & destination machines before any data is sent that means a connection is est

Recognize the purpose of icmp, ICMP is used to send error and control messa...

ICMP is used to send error and control messages. Ping uses ICMP to carry the echo-request and echo-reply.

Networking services, Your Windows client failed to broadcast to all servers...

Your Windows client failed to broadcast to all servers that it has accepted an IP address offer. What step is this in the four-step DORA process? a. Discovery b. Offering c. Reques

Effectiveness of data communications, Efficiency of a data communications s...

Efficiency of a data communications system depends on three fundamental characteristics - Delivery: The system should deliver data to the correct destination. Data should be r

What is meant by asymmetric multiprocessing (amp), It imposes hierarchy and...

It imposes hierarchy and a division of labor between processors. Only one designated processor, the master, controls (in a tightly coupled arrangement) slave processors dedicated t

Standard ip access-list use as test criteria, What does a Standard IP Acces...

What does a Standard IP Access-list use as test criteria Ans) Standard IP access list use only source address.

Networking concepts, Networking Concepts Q1  What are the main feature...

Networking Concepts Q1  What are the main features of TCP connections? Why is it said that TCP provides full-duplex service? Q2  What are the differences between TCP conne

Create and simulate a network - netml system, Create and simulate a network...

Create and simulate a network similar to the one shown here, using the NetML system. The network is a little more complex, as depicted at the right. There is an extra node

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