What is OpenACC?

The OpenACC Organization is dedicated to helping the research and developer community advance science by expanding their accelerated and parallel computing skills. We have 3 areas of focus: participating in computing ecosystem development, providing training and education on programming models, resources and tools, and developing the OpenACC specification.

#pragma acc data copy(A) create(Anew)
while ( error > tol  &&  iter  <  iter_max )  {
  error = 0.0;
#pragma acc kernels
  {
#pragma acc loop independent collapse(2) reduction(max:error)
  for (  int  j = 1; j < n-1;  j++ )  {
    for (  int  i = 1; i < m-1; i++ )  {
       Anew [j] [i] = 0.25 * ( A [j] [i+1] + A [j] [i-1] +
                                      A [j-1] [i] + A [j+1] [i]);
       error = max ( error, fabs (Anew [j] [i] - A [j] [i]));
      }
    }
    ...
  } 
}

Resources Access tutorials, guides, lectures, code samples, hands-on exercises and more. Get the Specs Download the latest OpenACC specification, technical report and work-in-progress proposals. Tools Get OpenACC compilers and tools designed by multiple vendors and academic organizations. Success Stories Learn how OpenACC users accelerated their scientific applications.

Latest News

Princeton’s Open Hackathon: Tackling diverse global challenges to advance science

Oct. 25, 2024

OpenACC and Open Hackathons Highlights: September 2024

Oct. 1, 2024

Initial AMD Zen 5 "Znver5" Support Merged For LLVM/Clang

Sep. 17, 2024

AmpereOne Performance With GCC vs. LLVM Clang Compilers

Sep. 16, 2024

OpenACC and Open Hackathons Highlights: Summer 2024

Aug. 30, 2024

Upcoming Events

Georgia Tech Open Hackathon
January 21, 2025
Hybrid Event
NOAA/NCAR/NREL Open Hackathon
February 18, 2025
Hybrid Event
Helmholtz Open Hackathon
April 1, 2025
Hybrid Event
IDRIS Open Hackathon
May 13, 2025
Hybrid Event

Join Us

Tweets by OpenACCorg