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

Networks - fundamental of network , Normal 0 false false fa...

Normal 0 false false false EN-IN X-NONE X-NONE Networks A networks  consists of two  or m

Explain cross bar interconnection networks, Cross Bar : The crossbar networ...

Cross Bar : The crossbar network is simplest interconnection network. It has a double dimensional grid of switches.  It's a Non-blocking network and offers connectivity between out

Byte number - transport layer, Byte Number TCP number all data  bytes ...

Byte Number TCP number all data  bytes that  are transmitted  in a connection. Numbering  is independent  in each direction when TCP receives bytes of data  a process. It stor

LAN, what is man LAN wan

what is man LAN wan

Virtual local area network, VLAN ( Virtual Local Area Network) is a concept...

VLAN ( Virtual Local Area Network) is a concept of creating distinct broadcast domains. It is a network which aims at partitioning the physical network. VLAN comprises all the attr

Explain the different signal propagation behaviours, Question : (a) Lis...

Question : (a) List down and explain the different signal propagation behaviours that radio waves exhibit. (b) Explain the term Delay Spread with reference to signal propaga

Building routing tables, There are basically two functions for creating rou...

There are basically two functions for creating routing tables, which are as given: Manual entry Software Further there are two types for computing routing table inf

Medium earth orbiting satellite, Medium Earth Orbiting satellite is an orbi...

Medium Earth Orbiting satellite is an orbit which is located just above the few hundred miles to a few thousands above the earth surface. It is of higher advantage than Low orbit s

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