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

What is ipconfig, What is ipconfig? Ipconfig is a utility program that ...

What is ipconfig? Ipconfig is a utility program that is commonly used to recognize the addresses information of a computer on a network. It can show the physical address as wel

What is topology, Q. What is Topology? - Physical/logical arrangement ...

Q. What is Topology? - Physical/logical arrangement - Topology of a network is the geometric depiction of the relationship of all the links and linking devices to one anothe

What is parabolic dish antenna, Q. What is Parabolic Dish Antenna? - In...

Q. What is Parabolic Dish Antenna? - Incoming signals means that the Signal bounces off of dish and is directed to focus - Outgoing signals signifies transmission is broadca

What are triggers and rules, Triggers are special user defined actions usua...

Triggers are special user defined actions usually in the form of stored procedures, that are automatically requested by the server based on data related events. It can perform diff

Explain about mesh topology, Q. Explain about Mesh Topology? - Dedicate...

Q. Explain about Mesh Topology? - Dedicated point-to-point links to each other device - n (n-1)/2 links an every device will have n-1 I/O ports - Advantages - Dedic

Achieving universal services, The purpose of internetworking is universal s...

The purpose of internetworking is universal service across heterogeneous networks. To give this service all computers, and routers have to agree to forward information from a sourc

Connection oriented multiplexing and de multiplexing, Connection Oriented M...

Connection Oriented Multiplexing And De multiplexing TCP socket  identified by 4 tuple: a.Source IP address b.Source port number c.Destination IP address d.Destina

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