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

Power supply and cpu bus, CPU bus It is connect with various component...

CPU bus It is connect with various components of the system and  transformation of data between components.   Power Supply It is separate  external part of cisco rou

Define the network security, Q. Define the Network Security? The Intern...

Q. Define the Network Security? The Internet and Web technology presents enormous promise for e-commerce. Web now is used to handle important business assets that became the

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

Signal to noise ratio, Problem 1. Explain the TCP/IP Reference Model wi...

Problem 1. Explain the TCP/IP Reference Model with diagram 2. Describe the following Maximum Data Rate of a Channel Signal to Noise Ratio   3. Describe the

What is exterior gateway protocol, What is EGP (Exterior Gateway Protocol)?...

What is EGP (Exterior Gateway Protocol)? It is the protocol the routers in neighboring autonomous systems use to recognize the set of networks that can be reached within or by

Global positioning system (gps) tracking, By utilizing measurements of the ...

By utilizing measurements of the so-called pseudo range between an object and each of several earth orbiting GPS satellites, the object can be very accurately located in space. A g

Explain ring interconnection networks, Ring: It is a simple linear array w...

Ring: It is a simple linear array where end nodes are associated.  It is equal to a mesh with wrap around connections.  The data transfer in a ring is generally one direction. So,

Sockets, When programming a server or a client, we have to deal with port n...

When programming a server or a client, we have to deal with port numbers and IP addresses, but we usually do this through an abstraction called a socket. Sockets are the standard A

Explain mesh interconnection networks, Mesh : This is two dimensional netwo...

Mesh : This is two dimensional networks.  In this all processing elements are organised in a two dimensional grid. The processor in the row i and column j are indicated by PE i .

Determine about unique least-cost path, Determine about unique least-cost p...

Determine about unique least-cost path If there is a unique least-cost path, the two algorithms will yield the similar result because they are both guaranteed to search the lea

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