Using library methods returns number of threads, Computer Engineering

Assignment Help:

Q. Using Library methods returns number of threads?

#include < omp.h >

void subdomain(float x[ ], int istart, int ipoints)

{

int i;

for (i = 0; i < ipoints; i++)

x[istart+i] = 123.456;

}

void sub(float x[ 10000], int npoints)

{

int t_num, num_t, ipoints, istart;

#pragma omp parallel default(shared) private(t_num , num_t, ipoints, istart)

{

t_num = omp_get_thread_num(); //thread number of current thread

num_t = omp_get_num_threads(); //number of threads

ipoints = npoints / num_t; /* size of partition */

istart = t_num * ipoints; /* starting array index */

if (t_num == num_t-1) /* last thread may do more */

ipoints = npoints - istart;

subdomain(x, istart, ipoints);

}

}

int main()

{

float array[10000];

sub(array, 10000);

return 0;

}

In this illustration we used two library methods : omp_get_num_threads() and omp_get_thread_num().

omp_get_num_threads() returns number of threads which are currently being used in parallel directive. 

omp_get_thread_num() returns thread number (an integer from 0 to omp_get_num_threads() - 1 where thread 0 is master thread).


Related Discussions:- Using library methods returns number of threads

Name of all sap databases, All SAP Databases are Relational Databases ...

All SAP Databases are Relational Databases is the all sap databases.

Why dynamic RAMs require refreshing, Explain briefly, why dynamic RAMs requ...

Explain briefly, why dynamic RAMs require refreshing? Ans: Due to the charge's natural tendency to distribute itself in a lower energy-state configuration that is, the charg

Electric typewriter in information distribution, Electric typewriter : Ele...

Electric typewriter : Electric typewriters are similar to standard typewriters but with an electronic motor taking the place of human energy. It is much faster than the standard m

Using binary search, A sorted file having 16 items. Using binary search, th...

A sorted file having 16 items. Using binary search, the maximum number of comparisons to find for an item in this file is The maximum number of comparison is 4

Illustrate program on hypothetical machine, Q. Illustrate program on hypoth...

Q. Illustrate program on hypothetical machine? The program given in figure above is a hypothetical program which performs addition of numbers stored from locations 2001 onwards

List the steps needed to perform page replacement, List the steps needed to...

List the steps needed to perform page replacement. The steps required to perform page replacement are: 1. Find out which page is to be removed from the memory. 2. Perfor

Period and space tradeoffs - artificial intelligence, Period and Space Trad...

Period and Space Tradeoffs - artificial intelligence: In practice, you are going to stop your agent for long term using in searching goal at some stage if it has not found a s

RISC performance using optimizing compilers, Q. RISC Performance using opti...

Q. RISC Performance using optimizing compilers? Performance using optimizing compilers: As instructions are simple compilers can be developed for efficient code organization a

Describe clusters in cellular systems, Question: a) With the help of a...

Question: a) With the help of a diagram, describe clusters in cellular systems. b) Describe the role of the following components in the GSM architecture Radio Sub-Sy

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