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

Vector-distance algorithm, Vector-Distance algorithm illustrated in more d...

Vector-Distance algorithm illustrated in more detail below: Packet switches wait for next update message and they goes by entries in packet. If entry has least path to destinat

Discuss the benefits and requirements of voip, Question 1 Discuss the bene...

Question 1 Discuss the benefits and requirements of VOIP Question 2 Define the following Multicast routing protocol explain in detail with diagram Multicast backbone

Fixed version of rdt , Fixed version of rdt 2.0 rdt 2.1 The  rdt 2.1 s...

Fixed version of rdt 2.0 rdt 2.1 The  rdt 2.1 sender and receiver  FSM each now  have  twice  as many  states  as before. This is because  the protocols  state must  now refle

Differentiate between multicast and broadcast, Multicast and Broadcast ...

Multicast and Broadcast In broadcast interconnection network at an individual time one node sends the data and all other nodes obtain that data.   Broadcast can be termed as on

Print Servers, Which of the following commands will display the current pri...

Which of the following commands will display the current print jobs on a printer named Office Printer 01?

Explain the structure of a typical ethernet frame, Question: (a) The IE...

Question: (a) The IEEE 802 series of standards describe both the Physical and Data Link layers of their respective technologies. Two important standards are 802.3 and 802.5, r

Explain the operation of a token ring topology for a lan, Question: (a)...

Question: (a) Show by means of a diagram the Ethernet frame structure and describe the six fields of the Ethernet frame structure. (b) Explain the operation of the Carrier S

Objective of parallel algorithms, After studying this part the students wil...

After studying this part the students will be able to understand about the following: Analysis of Parallel Algorithms; Different Models of Computation; o   Interco

What is border gateway protocol, What is BGP (Border Gateway Protocol)? ...

What is BGP (Border Gateway Protocol)? It is a protocol used to promote the set of networks that can be reached within an autonomous system. BGP enable this information to be c

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