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

Ethernet cable, what is max length of cable I can use

what is max length of cable I can use

Operating system for server, Operating system for Server Since 1994, w...

Operating system for Server Since 1994, when the original pair of web servers - NCSA HTTPd and CERN HTTPd , were proposed, dozens of commercial and shareware programs have

Little spider, #question.what can we do with a spider when it red?.

#question.what can we do with a spider when it red?.

Transport layer in osi model, The Transport layer implements reliable data ...

The Transport layer implements reliable data transport services. The various functions of Transport Layer are listed below The transport layer is meant for transmitting the data

Explain about the gopher, Explain about the Gopher The ghoper is a prot...

Explain about the Gopher The ghoper is a protocol designed to search, retrieve and display documents from remote sites on the  Internet. The Ghoper was formed as a piece of sof

Explain in brief about crc, What is CRC The CRC is computed while trans...

What is CRC The CRC is computed while transmission and appended to output stream as soon as last bit goes out onto wire. If the CRC were in header, it will be necessary to make

Illustrate addressing, Addressing Complicated addressing scheme because...

Addressing Complicated addressing scheme because there may be intermediate stations (APs), identified by flags

Determine 802.11a OFDM, 802.11a OFDM a) Orthogonal frequency-division m...

802.11a OFDM a) Orthogonal frequency-division multiplexing utilizing a 5-GHz band b) Same as FDM except all sub bands are used by only one source at a given time c)  Secu

Write examples of the transport layer, Example of transport layer are:- ...

Example of transport layer are:- a) TCP is connection oriented. b) UDP is connectionless

Explain the term standard error, Question: a) What is a Linux shell? ...

Question: a) What is a Linux shell? b) Prepare the commands for the following tasks: i) Change the working directory ii) Show the working directory iii) Execute a pro

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