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

How big can an intranet be, How big can an Intranet be? An Intranet ca...

How big can an Intranet be? An Intranet can be as big as a community of interest. Scale is an important factor in web implementation, but it has no bearing on the logical asso

Describe encapsulating, Can you describe encapsulating, carrier and passeng...

Can you describe encapsulating, carrier and passenger protocol?

Light sources and connectors, - Light source is LED (light-emitting diode) ...

- Light source is LED (light-emitting diode) or a laser - LEDs are cheaper however not as precise (unfocused) limited to short-distance use - Lasers is able to have a narrow

How network gateway is different from routers, Gateway A device linked...

Gateway A device linked to multiple physical TCP/IP networks capable of routing or delivering IP packets among them. Router It's a layer 3 device that connects 2 diss

What are the drawbacks of ethernet cabling, What are the drawbacks of Ether...

What are the drawbacks of Ethernet Cabling? The Ethernet cabling ahs the following drawbacks: 1. Ethernet is not a high-level performer in high-load environments. This proto

Distinguish cisc and risc, Question 1 Distinguish CISC and RISC Question ...

Question 1 Distinguish CISC and RISC Question 2 Write a short note on Asynchronous Transfer Mode of transmission Question 3 Explain various client/server applications using Ja

Explain tree interconnection network, Tree interconnection network:   In tr...

Tree interconnection network:   In tree interconnection network, processors are organised in a complete binary tree pattern. Figure: Tree interconnection network

Working of internet, As discussed in the earlier section each computer link...

As discussed in the earlier section each computer linked to the Internet has a unique address. Let's assume your IP address is 1.2.3.4 & you wish to send a message to the computer

Tree interconnection network, Tree interconnection network Tree inter...

Tree interconnection network Tree interconnection network(TIN)), processors are organized in a whole binary tree pattern.

State the uses of groupware, State the uses of groupware With the use o...

State the uses of groupware With the use of groupware, users can easily do most of the office related management work, which otherwise would be extremely difficult. For instanc

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