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

Post office protocols version - application layer, Post Office  Protocols ...

Post Office  Protocols Version In computing  the post office protocol  version 3 (POP3) is an  application layer internet standard  protocols  used by  local e mail  clients

Describe network security and internetworking security, Q. Describe Network...

Q. Describe Network security and Internetworking security? Network Security - Layers 5-7 - Securing the localized private domain. Network Administration, File Permissions

Command to show the hardware platform information, Recognize the command to...

Recognize the command to show the hardware platform information Ans) Show version is the command to show the hardware platform information

Modify the tcp server and udp server in client server, Let's imagine that w...

Let's imagine that we have 2 TCP clients. A simple one (modTCPClient.c) like the one you wrote in the first part of project 2 and another one (modTCPClient1.c) that after it connec

Controlling and monitoring access to the intranet, Controlling and monitori...

Controlling and monitoring access to the Intranet Digital certificates provide excellent means of controlling and monitoring access to the Intranets. The certificate itself act

User server interaction - application layer , User Server Interaction ...

User Server Interaction Cookies of the world  wide  web  was originally designed  as a stateess entity. A client  sends a request and the server responds. Their  relationship

Link-state routing, In link-state routing network topology is filled from...

In link-state routing network topology is filled from route calculation. Switches send link-state information about local joins. Every switch creates own routing tables. It needs

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