Intel® Math Kernel Library 2019 Developer Reference - C

DFTI_WORKSPACE

The computation step for some FFT algorithms requires a scratch space for permutation or other purposes. To manage the use of the auxiliary storage, Intel MKL enables you to set the configuration parameter DFTI_WORKSPACE with the following values:

DFTI_ALLOW

(default) Permits the use of the auxiliary storage.

DFTI_AVOID

Instructs Intel MKL to avoid using the auxiliary storage if possible.

See Also