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

Characteristics of the user private group scheme, Question: a) The cpi...

Question: a) The cpio utility has three operating modes. What are they? b) The characters of the permission string are broken up into three groups of three characters. Ex

Determine the term - mobility, Determine the term - Mobility Mobility ...

Determine the term - Mobility Mobility refers to the types of physical transitions that can be done by a mobile node within an 802.11 environment (no transition, movement from

Dns - server attacks, DNS - Server Attacks It’s not so easy to list al...

DNS - Server Attacks It’s not so easy to list all the associated attacks as they are evolving way so fast. As any error of flaw is identified, a patch is released in response

Overview of the various network topologies, QUESTION Write a report to ...

QUESTION Write a report to explain the concept of LAN and WAN including the various components of the telecommunication infrastructure required by UTM Ltd. You are required to

Satellite radio channels - computer network, Satellite Radio Channels ...

Satellite Radio Channels A communication  satellite links two or more  earth  microwave transmitter receiver, know  as ground  stations. The satellite receives transmission on

Computer Information Systems, I am taking a computer information systems cl...

I am taking a computer information systems class for which I have an online test I need done. It will not let me attach all the material that is on the test but someone well versed

IPV6, is DVMRP multicast prtocol supports IPV6?

is DVMRP multicast prtocol supports IPV6?

#title. Wireless broadband, Hi, i am a college student doing a report on wi...

Hi, i am a college student doing a report on wireless broadband. I needed to know user requirements of user groups ie: Home user Small Medium Large Businesses Things like w

Whitney houston, contribution to afican American history

contribution to afican American history

Mobile interent technology, Question 3:4 By experimentation, work out the l...

Question 3:4 By experimentation, work out the lowest SNR, under which 4 users can si- multaneously communicate, without error, via this system. For SNR, simply report the largest v

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