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

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

Contributing to the Excellence of Scientific Research: IDRIS Holds its Fourth Open Hackathon

Aug. 22, 2024

Upcoming Events

TACC Open Hackathon
October 15, 2024
Hybrid Event
NCHC Open Hackathon
November 13, 2024
Hybrid Event
OpenACC Birds of a Feather (BOF) at SC24
November 19, 2024
Atlanta, Georgia, USA

Join Us

Tweets by OpenACCorg