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

Command to view the configuration-register value, Recognize the command to ...

Recognize the command to view the configuration-register value Ans) show version is the command to view the configuration-register value

What is an arp and how does it work, ARP(ADDRESS RESOLUTION PROTOCOL) is a ...

ARP(ADDRESS RESOLUTION PROTOCOL) is a network layer protocol which associates the physical hardware address of a network node(commonly called as a MAC ADDRESS) to its ip address. n

Recognize the purpose of icmp, ICMP is used to send error and control messa...

ICMP is used to send error and control messages. Ping uses ICMP to carry the echo-request and echo-reply.

Network performance & characteristics, There are two kinds of characteristi...

There are two kinds of characteristics in case of network performance. Delay Throughput

advance routing, i need help with this assigmnet reply asap pleas

i need help with this assigmnet reply asap please

Reliable data transfer - transport layer, Reliable Data Transfer Figur...

Reliable Data Transfer Figure illustrate the  framework for reliable  transfer. The service  abstraction provided  to the upper  layer  entities is that  of a reliable channel

Define csma/cd, CSMA/CD - A Simple Definition A netwo...

CSMA/CD - A Simple Definition A network station wishing to broadcast will first check the cable plant to make sure that no other station is currently transmit

Explain about wireless ethernet, Wireless Ethernet (802.11) a) Operates...

Wireless Ethernet (802.11) a) Operates on physical plus data link layers b) BSS (Basic service set) stationary or mobile wireless stations and a central base station known a

Definition of csma/cd, Definition of CSMA/CD CSMA/CD (Carrier Sense Mu...

Definition of CSMA/CD CSMA/CD (Carrier Sense Multiple Access with Collision Detection) is used to minimize collisions, coordinate traffic and maximize number of frames deliver

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