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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.
 

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#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]));
 }
 }
 ...
 } 
}

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