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

Threats to information can include, Threats to information can include ...

Threats to information can include Deletion of a file or files. Corruption, caused either by hardware problems or by a bug in the software. Theft of company data

State the benefits of infrared light, State the benefits of Infrared light ...

State the benefits of Infrared light Infrared light does not penetrate walls or other opaque objects. This has two benefits: First, infrared communications can be more simply

Define network, Communication, Resource sharing and Media (When many host s...

Communication, Resource sharing and Media (When many host share their resources with every other OR when many devices connect with each other for resource sharing )

Explain about congestion control, Q. Explain about Congestion control? ...

Q. Explain about Congestion control? Congestion control Open-loop congestion control - prevent congestion before it happens retransmission policy - Ret

What are the disadvantages of ospf protocol, Disadvantages of OSPF protocol...

Disadvantages of OSPF protocol i) Single Area ii) High Hardware Requirements iii) Troubleshooting

Multicast routing protocols, Multicast Routing Protocols Multicast gr...

Multicast Routing Protocols Multicast group addresses are assigned by IANA [Internet Assigned Numbers Authority for well known services and protocols. Information is exchang

How is computer networks used in financial services, Q. How is computer net...

Q. How is computer networks used in Financial services? Financial services:   Today's financial services are totally depended on networks. Application includes credit history

link layer - computer network, Link Layer To move  to packet  from o...

Link Layer To move  to packet  from one node( host  or packet swtich0 to  net node  in the  route the network  layer  relies  on the  services  of the link layer. Particularl

Statements about ppp and slip for wan communications, State the statements ...

State the statements about PPP and SLIP for WAN communications?  Ans)    a) PPP uses its Network Control Programs (NCPs) component to encapsulate many protocols.  b) SLIP

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