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

Determine about the tcp/ip, Determine about the TCP/IP Stands for Tr...

Determine about the TCP/IP Stands for Transmission Control Protocol/Internet Protocol. This is the group of protocols that define the Internet and communication method used

What is data encapsulation, What is data encapsulation? Data encapsulat...

What is data encapsulation? Data encapsulation is the method of breaking down information into smaller manageable chunks before it is transferred across the network. It is also

Udp connection establishment & termination, simple introduction,defination ...

simple introduction,defination and with example & digram

Discuss about the hypertext, Discuss about the Hypertext The hypertext ...

Discuss about the Hypertext The hypertext allows for the integration of text, graphics, audio and video on a webpate. This can make it very easy to browse and very exciting to

What are the key elements of protocols, What are the key elements of protoc...

What are the key elements of protocols? The key elements of protocols are a. Syntax   It refers to the structure or format of the data that is the order in which they a

What is vrc, What is VRC? It is the most common and least costly mechan...

What is VRC? It is the most common and least costly mechanism for Error Detection. In VRC, a parity bit is added to each data unit so that the total number of 1s becomes even f

Name the protocol responsible for finding the mac address , a)  What does t...

a)  What does the "CD" mean in the CSMA/CD? How is it implemented in the Ethernet?   b)  Consider an Ethernet hub with 8 ports and an Ethernet switch with 8 ports. In both cases

Explain the term- encryption, Explain the term- Encryption Because all ...

Explain the term- Encryption Because all of the user traffic, as well as control traffic, is digitized in second generation systems, it is a relatively simple matter to encrypt

Hardware component used to store buffers, Recognize the hardware component ...

Recognize the hardware component used to store buffers, tables, running-configuration etc? Ans) RAM is the dynamic memory area. ROM have the boot strap code, NVRAM have the star

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