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

Protocol comes under hybrid dynamic type, Which protocol comes under Hybrid...

Which protocol comes under Hybrid dynamic type? Ans)  EIGRP (ENHANCED INTERIOR GATEWAY ROUTING PROTOCOL) comes under hybrid dynamic.

Causes of failures, CAUSES OF FAILURES Every failure has a well-define...

CAUSES OF FAILURES Every failure has a well-defined cause.  Any system or device has an inherent strength or capacity to resist failures. This depends on design, material, man

What is piggybacked ack, What is piggybacked ACK The protocol will be i...

What is piggybacked ACK The protocol will be incorrect. Suppose that 3-bit sequence numbers we are using. Consider following situation: A just send frame 7. B gets frame

Show the bidirectional transmission, Q. Show the Bidirectional Transmission...

Q. Show the Bidirectional Transmission? Bidirectional Transmission Each party must maintain S and R to track frames sent and expected Piggybacking hooking ACK wit

Packet switching and virtual circuit packet switching, Describe Circuit swi...

Describe Circuit switching, Packet switching and Virtual Circuit Packet switching. Explain their suitability for different applications such as telephone and internet. Packet S

Write the definition of SAN, Write the definition of SAN A SAN is a sep...

Write the definition of SAN A SAN is a separate network to handle storage requirements. The SAN detaches storage tasks from specific servers and makes a shared storage facility

TCP for live video, 1. What advantages and disadvantages does TCP have for ...

1. What advantages and disadvantages does TCP have for live video teleconferencing applications

#title. Wireless broadband, Hi, i am a college student doing a report on wi...

Hi, i am a college student doing a report on wireless broadband. I needed to know user requirements of user groups ie: Home user Small Medium Large Businesses Things like w

Features of parallel virtual machine pvm, Features 1. Simple to install...

Features 1. Simple to install; 2. Simple to configure; 3. Multiple applications from one user can implement; 4. Multiple users can each use PVM concurrently; 5. C, C++, and

Advantage of repeaters, Advantage of Repeaters Repeaters provide  the ...

Advantage of Repeaters Repeaters provide  the  advantage of increasing type size  of LAN or connecting LAN  segments. Repeater can overcome 10  base 5 Ethernet LANM restrictio

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