CODEWITHSUNDEEP
c++cparallel-processingopenmp
GedO
GedO

Reputation: 11

Difference between OpenMP #pragma omp for v/s #pragma omp parallel for?

What is the difference between :

 #pragma omp for
  {for_loop}

and

 #pragma omp parallel for
  {for_loop}

Upvotes: 1

Views: 509

Answers (1)

mfnx
mfnx

Reputation: 3018

#pragma omp parallel

This spawns a group of threads.

#pragma omp for

This divides the loop iterations between the threads.

Basically,

#pragma omp parallel
#pragma omp for
for (...)
{}

is the same as

#pragma omp parallel for
for (...)
{}

Upvotes: 3

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