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

Two commands that copies the configuration in nvram to ram, Recognize the t...

Recognize the two commands that copies the configuration in NVRAM to RAM Ans) a) Copy startup-config running-config b)  Configure memory

State token bus frame format, Token Bus Frame Format No length fiel...

Token Bus Frame Format No length field Data is able to be much larger (timers prevent hogs) Frame control Ack required? Data vs Control frame and how is

State about the single sign-on intranet, State about the Single Sign-On Int...

State about the Single Sign-On Intranet This Intranet, if managed efficiently, allows maximum security by firewalling anyone from inappropriate sites automatically. For exam

Maximum packet lifetime, Take the maximum packet lifetime, T.  It's stated ...

Take the maximum packet lifetime, T.  It's stated that T must be big enough to make sure the packet and its ACK have vanished.  Why do we have to have the ACK?

Define the term - handoff and dynamic configuration, Define the term - Hand...

Define the term - Handoff and Dynamic configuration Handoff/roaming  The MAC protocol used in the wireless LAN should enable mobile stations to move from one cell to anoth

Unguided media - wireless, Unguided Media: Wireless - A Wireless commu...

Unguided Media: Wireless - A Wireless communication transporting electromagnetic waves without a physical conductor Wireless Propagation Methods - Ground - radio

State ieee - ethernet, IEEE 802.3-Ethernet Introduction LAN ...

IEEE 802.3-Ethernet Introduction LAN (Local Area Network) - network connecting devices in a limited geographic area usually privately owned and limited to a single o

Classify different types of ip routing, INTERNETWORKING - TCP/IP 1. Sta...

INTERNETWORKING - TCP/IP 1. State the following terminologies: a) Node b) Router c) Host d) Subnet e) Network 2. What do you understand by IEEE 802 Local Area network 3.

Write down code snippets for the following in jade, Question 1 Using a ...

Question 1 Using a flowchart and appropriate annotations, describe the execution path of an Agent in JADE 2 Write down code snippets for the following in JADE a Agent A n

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