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 are the categories of traditional ethernet, Categories of traditional ...

Categories of traditional Ethernet a)  Baseband - digital signals using Manchester encoding b) 10Base2, 10-Base-T, 10Base5, 10Base-FL c)  First number signifies data rate

Explain the technique- backpressure, Explain the technique- Backpressure ...

Explain the technique- Backpressure This technique produces an effect same to backpressure in fluids flowing down a pipe. It includes link-by-link use of flow control in a dire

Intranet, Intranets are fundamentally "small" Internets. They employ the sa...

Intranets are fundamentally "small" Internets. They employ the same network facilities which the Internet does, however access is limited to a restricted sphere. For example, a com

Summary of special ip addresses, The table below gives a summary of special...

The table below gives a summary of special IP addresses.

Explain the basic of network properties, Explain the basic of Network Prope...

Explain the basic of Network Properties   The subsequent properties are related with interconnection networks. 1)  Topology: It refers how the nodes a network are systema

What is the network router, It's a Hybrid device that joins the features of...

It's a Hybrid device that joins the features of both bridges and routers.

Describe wdm, Question 1 Discuss the architecture of new generation networ...

Question 1 Discuss the architecture of new generation networks. Question 2 Explain the functioning of datagram packet switching and virtual circuit packet switching Quest

What is the last step in data encapsulation, The Five steps to data encapsu...

The Five steps to data encapsulation (IN ORDER): 1) User information is changed into data. 2) Data is changed into segments. 3) Segments are changed into datagram and pack

Connection-oriented service, The connection-oriented service process for ne...

The connection-oriented service process for networking is same to the manner in which telephones are used. This is shown as follows: A caller dials a number of the receiver. The

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