Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
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.
// 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.
State the process of calculate the drift rate A drift rate of 10 -9 means 1 second in 109 seconds or 1 nsec every second. At OC-1 speed, say 50 Mbps for simplicity, a bit las
State the difference between Byte streams and message Byte streams and message are different. In a message stream, network keeps track of the message boundaries. In a byte stre
Extranet and Intranet An Extranet is a type of Intranet (Internal TCP/IP Network) that has been selectively opened to a firm's suppliers, customers. Intranet An intrane
Can you describe dual home architecture?
VLAN ( Virtual Local Area Network) is a concept of creating distinct broadcast domains. It is a network which aims at partitioning the physical network. VLAN comprises all the attr
Routers The network layer (also called layer3) manages device addressing tracks the location of devices on the network and determines the best way to move data. Which
The three ways to give login access to the router are by the Console port, auxiliary port, and virtual terminal (Telnet)
Describe how EIGRP finds its successor and feasible successor?
What is the client side of applications To build the client side of applications, developers use various tools. Some of the popular software development environments include Vi
ROLE OF DESIGN IN ACHIEVING RELIABILITY One of the most important methods for achieving high reliability is through design. Use reliability cannot be higher than the design re
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd