SCALFFT_DECOMPOSE_TYPE

Set the decomposition method for the 3D matrix during 3D FFT computations.

Parameters

**Table 1** Parameter definitions
Parameter	Value	Description
SCALFFT_DECOMPOSE_TYPE_SLAB	0	Slab decomposition.
SCALFFT_DECOMPOSE_TYPE_PENCIL	1	Pencil decomposition.
SCALFFT_DECOMPOSE_TYPE_BRICK	2	Brick decomposition, which is not supported currently.

Examples

The decomposition method for 3D FFT computations using the extended interface can be specified as pencil decomposition by setting the environment variable -x SCALFFT_DECOMPOSE_TYPE=1.

Parent topic: Extended Interface Environment Variables