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

ICT, state the advantages of the ICT

state the advantages of the ICT

Framing, different framing methods

different framing methods

Which layer defines bit synchronization, Physical layers defines with synch...

Physical layers defines with synchronizing the 1s and 0s on the wire.

What is topology, Q. What is Topology? - Physical/logical arrangement ...

Q. What is Topology? - Physical/logical arrangement - Topology of a network is the geometric depiction of the relationship of all the links and linking devices to one anothe

List the advantages of arcnet, List the advantages of ARCNet. Here are ...

List the advantages of ARCNet. Here are some of the ARCNet's benefits: 1.  It is extremely reliable. 2. ARCNet is simple to install and troubleshoot. 3. It has an exce

Public key cryptography and private key cryptography, Question: a) Di...

Question: a) Differentiate between the following key terms used in any e-banking security system: (i) Authorisation v/s Authentication. (ii) Data Integrity v/s Data Conf

Packet switching, Suppose there are exactly five packet switches (Figure 4)...

Suppose there are exactly five packet switches (Figure 4) between a sending host and a receiving host connected by a virtual circuit line (shown as dotted line in figure 4). The tr

Describe the method of one way redistribution and mutual, Define  the conce...

Define  the concept of one way redistribution and mutual

When would we use isdn, We use IDSN supports high speed voice, data and vid...

We use IDSN supports high speed voice, data and video and is a good choice for many small businesses.

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