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

No retransmission - transport layer, No Retransmission This  protocols...

No Retransmission This  protocols  will not  through  the correctly received packets  but buffers than  and send  acknowledgment  for those packets. Thus  retransmission of th

How to configure the ethernet interfaces on the host pc, How to Configure t...

How to Configure the Ethernet Interfaces on the Host PCs Configure the Ethernet interfaces of PC1, PC2, PC3, PC4, PC5, and PC6 with the IP addresses and default gateways indica

Which type of switching is considered to be ''wire speed'', Cut-Through is ...

Cut-Through is the best mode of switching. Store and Forward reads in the whole frame, confirms the frame is valid, and then forwards the frame onto the wire. Cut-Through only chec

Which two commands shows the cisco ios filename, These two command show the...

These two command show the cisco IOS filename a) show ver b) show flash

Firewall architectures-screening router, Screening Router In this setu...

Screening Router In this setup network router acts as a firewall. It checks all incoming and outgoing packets according to the predefined rules. This filter is placed at the c

Critical path method, You are the Senior Project Manager in a software comp...

You are the Senior Project Manager in a software company and have, as part of your team, a student on a three month internship. The student has proudly told you that they have stu

Source independence, Next hop to receiver does not relay on source of packe...

Next hop to receiver does not relay on source of packet. This phenomenon is known 'Source Independence'. It has various benefits. It gives efficient and fast routing. Packet switch

IP address, what is variable ip address

what is variable ip address

Perfect shuffle permutation-concept of permutation network, Perfect Shuffle...

Perfect Shuffle Permutation This was advised by Harold Stone (1971). Consider N objects each characterized by n bit number say  X n-1, X n-2, X 0    (N is chosen such that N

Program to reload the router -ccna, Cable, Erase, and Reload the Router ...

Cable, Erase, and Reload the Router Step 1: Cable the network. Cable a network that is same to the one in the topology diagram. Step 2: Clear the configuration on the rou

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