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 two functions of the data link mac layer, a) Manages protocol ...

a) Manages protocol access to the physical network medium b) Permits multiple devices to uniquely signify one another on the data link layer

Topology-tcp and udp sources, To relieve some programming burden, project 5...

To relieve some programming burden, project 5 is a group project that two students can form a group to do and submit one report. In your submitted report, please specify who is you

Introduction-parallel algorithms, Introduction An algorithm is defined ...

Introduction An algorithm is defined as a series of computational steps required to accomplish an exact task. The algorithm works for a given input and will terminate in a well

Find the domain, Find the domain Name of 128.252.160.200

Find the domain Name of 128.252.160.200

What is the disadvantage of a star topology, What is the disadvantage of a ...

What is the disadvantage of a star topology? One major drawbacks of star topology is that once the central hub or switch get damaged, the whole network becomes unusable.

Name the two types of oltp, a) TP lite , based on stored procedures. b)...

a) TP lite , based on stored procedures. b) TP heavy , based on the TP monitors.

Enumerate about the virtual private network, Enumerate about the Virtual Pr...

Enumerate about the Virtual Private Network (VPN) Even though, many firewalls also include the features of the virtual private network, the functionality and capabilities of V

Http is stateless - discuss this statement, Question : (a) Describe, w...

Question : (a) Describe, with the aid of a diagram, a hybrid topology of a network of your choice. (b) Briefly explain the similarity and differences between a switch and

Define the microcells- routing and switching, Microcells As cells becom...

Microcells As cells become smaller, antennas move from the tops of tall buildings or hills, to the tops of small buildings or the sides of large buildings, and finally to lamp

Elaborate the term - database connectivity, Elaborate the term - Database C...

Elaborate the term - Database Connectivity Basic connectivity A number of database management systems are available today such as the Oracle, Sybase, Ingres, etc. Most

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