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

Ku-band earth station, Ku-BAND EARTH STATION This is most recent on-goi...

Ku-BAND EARTH STATION This is most recent on-going project under which 40 remote sites will be installed for CDMA back haul and 60 sites will be installed for GSM back haul. 4

Illustrate return to zero encoding, Q Illustrate Return to Zero encoding? ...

Q Illustrate Return to Zero encoding? - In NRZ-I long strings of 0s may still be a problem - May comprise synchronization as part of the signal for both 1s and 0s - How?

Drawback of repeaters, Drawback of  Repeaters. Repeater  has no filte...

Drawback of  Repeaters. Repeater  has no filtering capability as it forwards  every frame. Repeater shell  be placed  at accurate distance  before  actual  signal becomes

Network layer in osi model, The Network layer is used to route physical dat...

The Network layer is used to route physical data to the destination point, it decides the actual path from where data travels to destination point. The network layer supports both

Itc597, restore the scrambled bits to their original order

restore the scrambled bits to their original order

Define the class B addresses, Define the Class B Addresses? First t...

Define the Class B Addresses? First two octets are the network number as well as the last two octets are the host number 16382 probable blocks for assignment to organi

Determine the term - backend lan, Determine the term - Backend LAN Back...

Determine the term - Backend LAN Backend networks are used to interconnect large systems like mainframes, supercomputers, and mass storage devices. The key needs here is for bu

Ospf - open shortest path first , OSPF ( open Shortest Path First) Open...

OSPF ( open Shortest Path First) Open shortest  path first  is a routing  protocols  developed for internet protocols networks by the  interior  gateway protocols working group

What do you mean by substitutional ciphers, Q. What do you mean by Substitu...

Q. What do you mean by Substitutional Ciphers? Substitutional Ciphers Monoalphabetic Substitution Polyalphabetic Substitution - Transpositional - character

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