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

Concept of permutation network, Concept Of Permutation Network In permu...

Concept Of Permutation Network In permutation interconnection networks the information replace requires data transfer from input set of nodes to output set of nodes and likely

What is star topology, What is Star topology Each station is directly c...

What is Star topology Each station is directly connected to a common central node. Typically, each station attaches to a central node via two point-to-point links, one for tran

Overview of the transport layer protocols, Overview of the Transport  Laye...

Overview of the Transport  Layer Protocols Transport layer  can be  available  more than  protocols  to the  network  applications. For  example the network  applications. For

Program to load the router with the supplied scripts-ccna, Load the Router ...

Load the Router with the Supplied Scripts Enable ! config term ! hostname Router1 ! enable secret class ! no ip domain-lookup !  interface FastEth

How to install an anti-virus program, In a network that contains two server...

In a network that contains two servers and twenty workstations, where is the best place to install an Anti-virus program? An anti-virus program must be installed on all servers

Matrix computation and multiplication, In the following section, we shall d...

In the following section, we shall discuss the algorithms for solving the matrix multiplication difficulty using the parallel models. Matrix Multiplication Problem Let ther

Layer of security, Other than performance  issues, there could be security ...

Other than performance  issues, there could be security reasons for using something like xinetd.  Make simple design in which a new version of xinetd gives a layer of security.

Command that configures serial0 for ppp encapsulation, Recognize the comman...

Recognize the command that configures serial0 for PPP encapsulation Ans) Router(config-if)# encapsulation ppp

What is ring topology, What is Ring topology The network consists of a ...

What is Ring topology The network consists of a set of repeaters joined by point-to-point links in a closed loop. Each station attaches to the network at a repeater and can tra

What is netbios and netbeui in networking, What is NETBIOS and NETBEUI in N...

What is NETBIOS and NETBEUI in Networking? NETBIOS is a programming interface that permits I/O requests to be sent to and received from a remote computer and it keeps the netwo

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