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

Applications Due March 8 for ALCF INCITE Hackathon 2023

Jan. 19, 2023

OpenACC and Open Hackathons Highlights: September 2022

Sep. 30, 2022

GCC Progressing On OpenMP 5.x, OpenACC 2.7+ GPU Offloading & More AMD Improvements

Sep. 21, 2022

Princeton's GPU Hackathon Pairs Industry Mentors with Researchers

Sep. 6, 2022

OpenACC and Open Hackathons Highlights: August 2022

Aug. 30, 2022

Upcoming Events

IDRIS Open Hackathon
March 27, 2023
Hybrid Event
EuroCC AI for Science Bootcamp
April 17, 2023
Digital Event
ALCF INCITE Open Hackathon
April 25, 2023
Hybrid Event
NVIDIA/HLRS SciML GPU Bootcamp
April 26, 2023
Digital Event

Join Us

Tweets by OpenACCorg