https://github.com/scivision/fortran-parallel-examples

https://github.com/scivision/fortran-parallel-examples

Last synced: 23 days ago
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• Host: GitHub
• URL: https://github.com/scivision/fortran-parallel-examples
• Owner: scivision
• License: mit
• Created: 2023-07-19T19:27:16.000Z (over 2 years ago)
• Default Branch: main
• Last Pushed: 2025-07-12T00:20:54.000Z (4 months ago)
• Last Synced: 2025-08-03T04:23:04.322Z (3 months ago)
• Language: Fortran
• Size: 22.5 KB
• Stars: 0
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# Fortran Parallel Examples

[![cmake](https://github.com/scivision/fortran-parallel-examples/actions/workflows/cmake.yml/badge.svg)](https://github.com/scivision/fortran-parallel-examples/actions/workflows/cmake.yml)

[![oneapi-linux](https://github.com/scivision/fortran-parallel-examples/actions/workflows/oneapi-linux.yml/badge.svg)](https://github.com/scivision/fortran-parallel-examples/actions/workflows/oneapi-linux.yml)

Examples of parallel runtimes from native Fortran syntax.

[direct MPI operations](https://github.com/scivision/fortran-mpi-examples)

or

[Fortran Coarrays](https://github.com/scivision/fortran-coarray-examples)

are in separate repos.

Examples include:

* do concurrent: including Fortran 202x "reduce" syntax supported by NVIDIA HPC SDK and Intel oneAPI

* OpenACC: directive for Fortran

* openmp: OpenMP threading examples

## OpenMP

macOS users may need to

[install OpenMP library](https://gist.github.com/scivision/16c2ca1dc250f54d34f1a1a35596f4a0).

## OpenACC

Not every compiler supports OpenACC.

For example, Intel oneAPI does not support OpenACC, but provides a

[migration tool](https://www.intel.com/content/www/us/en/developer/articles/technical/migration-of-openacc-api-to-openmp-api.html)

from OpenACC to OpenMP.

NVIDIA HPC SDK generally shows a clear (say 10s of percent) runtime improvement with OpenACC on these example.

Other compilers like GCC might show little advantage.