Chapter 8: OpenACC Next steps

Here we will show some additional directives that can be used in OpenACC pragmas by carrying out different types of operations on one or more two-dimensional matrices.

The code examples in these sections of the book compile and run on a remote machine and display results here in your browser.

If you want to try the code on your own machine, the code for these examples is in a GitHub repo for the CSInParallel Project. The code is inside folders called IntermediateOpenACC/next-steps and IntermediateOpenACC/MatrixMultiply-OpenAcc.

All the code examples have a Makefile in each subfolder.

• 8.1 The collapse() pragma directive on parallel for loop
  • Example: Update cells of each matrix
  • Some ‘best practices’ in this code
• 8.2 Reduction with a parallel for loop
• 8.3 A classic linear algebra example: matrix multiply
  • Final thought: a way of work

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