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

Configure the logical topology - configure router1, Configure Router1. ...

Configure Router1. From Host1, connect to the console of Router 1 and establish a console session. Directions for creating a console connection using HyperTerminal are in Appen

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

One characteristic of rarp?, Reverse Address Resolution Protocol is used to...

Reverse Address Resolution Protocol is used to get a layer 3 address if the MAC address is called which then facilitates the loading of the O/S.

Write the generic name of the osi layer, Write the Generic Name of the OSI ...

Write the Generic Name of the OSI Layer a)  The figures below illustrate, side by side, the OSI 7-layer reference model and the Internet protocol stack. Inside each box represen

Show the drawbacks of go-back-N, Q. Show the Drawbacks of Go-back-N? D...

Q. Show the Drawbacks of Go-back-N? Drawbacks of Go-back- N - Inefficient - Every out of order received packets are discarded (receiver side is simplified) - This

Client-server , We need to design and implement a secure conference system....

We need to design and implement a secure conference system. The system will allow users to connect to a conference server and to participate in a shared conversation. The conversat

Illustrate data-link layer in osi layers model, Q. Illustrate Data-Link Lay...

Q. Illustrate Data-Link Layer in osi layers model? Data-Link Layer: This layer takes the data messages or frames from the Network Layer and gives for their actual transmissio

Job of designing the new network layout, You have been tasked with the job ...

You have been tasked with the job of designing the new network layout for R2I's new location. R2I has a fractional T1 line that enters the premises at Site B. You can use: 1

What are the brigdes, Brigdes Introduction - LAN may require to cove...

Brigdes Introduction - LAN may require to cover more distance than the media can handle effectively or - Number of stations may perhaps be too great for efficient frame d

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