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

Reliability - fundamentals of networks , Reliability Reliability  is t...

Reliability Reliability  is the measure of how  often  a network is usable. MTSF( Mean time  Between Failure) is a measure of the average time  a component  is expected to ope

Functions of the information security steering committee, Question: (a)...

Question: (a) Do you agree with the following statements (specify your reasons to support your answer for each):- i) Policies are the foundation for the development of sta

Netware ipx addressing uses a network number, NetWare IPX addressing uses a...

NetWare IPX addressing uses a network number and a node number. Which  statements are true? A. The network address is administratively assigned and can be up to 16 hexadecimal digi

Key components of inter-vlan routing , As configuring of VLANs helps in con...

As configuring of VLANs helps in controlling the size of broadcast domains. There are some key components of inter-VLAN routing such as VLAN capable switch Router Ro

Topology, bus topology disadvantage?

bus topology disadvantage?

Difference between routable and non- routable protocols, What is the differ...

What is the difference between routable and non- routable protocols? Routable protocols can work with a router and can be used to make huge networks. Non-Routable protocols

Mechanical characteristics of RS232 interface, Q. Mechanical Characteristic...

Q. Mechanical Characteristics of RS232 interface? - 9-pin connector - 9-pin connector is more usually found in IBM-PC but it covers signals for asynchronous serial com

What are challenges of electronic commerce, Question 1: (a) In the con...

Question 1: (a) In the context of an information system, distinguish and relate among the terms: data, information and decision-making. (b) Describe at least two chall

Managing and securing the web utility of the router, Managing and Securing ...

Managing and Securing the Web Utility of the Router Step 1: Configure web access. Navigate to the Administration section. Change the router password to cisco. For Web Uti

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