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

Fiber optic cable - computer network, Fiber Optic Cable A fiber  opt...

Fiber Optic Cable A fiber  optic  cable is made  of glass or plastic and transmits signals in the form of light pulses. An optical fiber  is a thin  flexible medium  conducts

Write the statement which is true regarding full duplex, Allows for transmi...

Allows for transmission and receiving of data concurrently

What is the structure of ip multicast address, Question : (a) Several ...

Question : (a) Several techniques are now available for users to connect to the Internet. (i) A modem is commonly used to dial up to the Internet. Why is a modem needed fo

Programming based on message passing, Programming Based on Message Passing ...

Programming Based on Message Passing As we know, the programming model based on message passing uses high level programming languages like C/C++ along with a number of message

When a switch is said to be congested, When a switch is said to be congeste...

When a switch is said to be congested? It is possible that a switch receives packets faster than the shared link can accommodate and keeps in its memory, for an extended period

The command to show the frame relay map table, Recognize the command to sho...

Recognize the command to show the Frame Relay map table Ans) Router# show frame-relay map is the the command to show the Frame Relay map table

Write down the purpose of arp?, Address Resolution Protocol resolves the MA...

Address Resolution Protocol resolves the MAC address if the IP address is known. It is a layer 3 protocol.

Definition of csma/cd, Definition of CSMA/CD CSMA/CD (Carrier Sense Mu...

Definition of CSMA/CD CSMA/CD (Carrier Sense Multiple Access with Collision Detection) is used to minimize collisions, coordinate traffic and maximize number of frames deliver

Subnet layer of the tcp-ip model, Q. Subnet layer of the TCP-IP model? ...

Q. Subnet layer of the TCP-IP model? These two layers of the OSI correspond straight to the subnet layer of the TCP/IP model. Majority of the time the lower layers under the

What do you mean by osi, What do you mean by OSI? The Open System Inter...

What do you mean by OSI? The Open System Interconnection (OSI) reference model explains how information from a software application in one computer moves by a network medium to

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