FFTW3
=====

.. toctree::
   :maxdepth: 1
   :caption: Contents:

Supported versions
------------------

To check which `FFTW2`_ and `FFTW3`_ versions and build types are currently supported on Discoverer, execute on the login node:

.. code-block:: bash

 module avail fftw/2
 module avail fftw/3

.. note:: `FFTW2`_ is kept in the software repository only for providing backward compatibility required by old (by design) software packages.

Loading/Compiler affinity
-------------------------

Intel oneAPI build
..................

This build is produced by using Intel classic compilers along with Intel MPI library:

.. code:: bash

 module load fftw/3/3.3.10-intelmpi

Intel oneAPI MKL
----------------

See :doc:`mkl`

NVIDIA HPC SDK build
....................

This build is produced by using NVIDIA HPC SDK LLVM compilers along with the latest OpenMPI (4) library:

.. code:: bash

 module load fftw/3/3.3.10-nvidia-openmpi

AMD AOCC + MPICH3
.................

This build is produced by using AMD AOCC LLVM compilers along with the latest MPICH3 library (can work with MPICH4):

.. code:: bash

 module load fftw/3/3.3.10-aocc-mpich

AMD AOCC + OpenMPI
..................

This build is produced by using AMD AOCC LLVM compilers along with the latest OpenMPI (4) library:

.. code:: bash

 module load fftw/3/3.3.10-aocc-openmpi

GNU GCC + MPICH3
................

This build is produced by using GCC classic compilers along with the latest MPICH3 library (can work with MPICH4):

.. code:: bash

 module load fftw/3/3.3.10-gcc-mpich

GNU GCC + OpenMPI
.................

This build is produced by using GCC classic compilers along with the latest OpenMPI (4) library:

.. code:: bash

 module load fftw/3/3.3.10-gcc-openmpi

Getting help
------------

See :doc:`help`

.. _`FFTW2`: https://www.fftw.org/
.. _`FFTW3`: https://www.fftw.org/