Show the programmes for parallel systems, Computer Engineering

Assignment Help:

Q. Show the Programmes for Parallel Systems?

Adding elements of an array using two processor    

 int sum, A[ n] ;  //shared variables                                                                                              

void main ( ){

                         int i ;

for (i=0; i

scanf ("%d",&A[i] );                                                                                                   

sum=0;                                                                                                                         

// now create process to be executed 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 executed 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 last half of array is passed to processor P1 that adds them. For the meantime processor P0 adds the first half of array. The variable sum is locked to avoid inconsistency.


Related Discussions:- Show the programmes for parallel systems

What are the four linq providers that .net framework ships, 1. LINQ to Obje...

1. LINQ to Objects - Implements a LINQ query against a collection of objects 2. LINQ to XML - Implements an XPATH query against XML documents 3. LINQ to SQL - Implements LINQ

Define syntax of barrier directive, Q. Define syntax of barrier directive? ...

Q. Define syntax of barrier directive? Barrier Directive  The syntax of barrier directive is  #pragma omp barrier When a thread attains barrier it waits till all threa

Avoiding over fitting in decision trees, A v o iding Over fitting - Arti...

A v o iding Over fitting - Artificial intelligence As  we  discussed  in  the last  lecture,  over fitting  is  a  normal  problem  in machine learning. Decision trees suffe

Operation of micro-programmed control unit, Micro-instructions are stored i...

Micro-instructions are stored in control memory. Address register for control memory comprises the address of subsequent instruction which is to be read. Control memory Buffer Regi

Explain the working of any one of centralized spc, Explain the working of a...

Explain the working of any one of centralized SPC? Standby mode of operation is the easiest of dual processor configuration operations. Usually, one processor is active and

Difference between the testing and verification, Difference between the tes...

Difference between the testing and verification. Verification proves conformance with a specification. Testing tries to find cases where the system does not meet its specifi

Define class p, Define class P  The class of all sets L that can be kno...

Define class P  The class of all sets L that can be known in polynomial time by deterministic TM. The class of all decision problems that can be decided in polynomial time.

What are parallel algorithms, What are Parallel Algorithms? The central...

What are Parallel Algorithms? The central assumption of the RAM model does not hold for some newer computers that can implement operations concurrently, i.e., in parallel algor

Instruction set architecture, Question (a) A 500 MHz Pentium III proce...

Question (a) A 500 MHz Pentium III processor takes 2 ms to run a program with 200,000 instructions. A 300 MHz UltraSparc processor takes 1.8 ms to run the same program with 23

Explain an interrupt, Used to interrupt CPU normal implementation routine a...

Used to interrupt CPU normal implementation routine and to get its attention .Mostly generated by an external devices, timers, counters...etc

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