Developer Reference for Intel® oneAPI Math Kernel Library for C

ID 766684
Date 3/22/2024
Public

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DftiCommitDescriptorDM

Performs all initialization for the actual FFT computation.

Syntax

status = DftiCommitDescriptorDM(handle);

Include Files

  • mkl_cdft.h

Input Parameters

handle
The descriptor handle. Must be valid, that is, created in a call to DftiCreateDescriptorDM.

Description

The cluster FFT interface requires a function that completes initialization of a previously created descriptor before the descriptor can be used for FFT computations in a particular MPI process. The DftiCommitDescriptorDM function performs all initialization that facilitates the actual FFT computation. For the current implementation, it may involve exploring many different factorizations of the input length to search for a highly efficient computation method.

Any changes of configuration parameters of a committed descriptor via the set value function (see Descriptor Configuration Functions) requires a re-committal of the descriptor before a computation function can be invoked. Typically, this committal function is called right before a computation function call (see FFT Computation Functions).

Return Values

The function returns DFTI_NO_ERROR when completes successfully. If the function fails, it returns a value of another error class constant (for the list of constants, refer to Error Codes).

Prototype

   
MKL_LONG DftiCommitDescriptorDM(DFTI_DESCRIPTOR_DM_HANDLE handle);