DPCT1075

Intel® DPC++ Compatibility Tool Developer Guide and Reference

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ID 768918

Date 10/31/2024

Version

Public

Visible to Intel only — GUID: GUID-3ABDBD75-8AA8-4A50-88C7-32344838ABC3

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DPCT1075

NOTE:

This diagnostic message is no longer generated by Intel® DPC++ Compatibility Tool 2023.0 or later.

Message

Migration of cuFFT calls may be incorrect and require review.

Detailed Help

The warning is generated in the following cases:

In the original code one cuFFT handle may be associated with different streams, but Intel® DPC++ Compatibility Tool could not detect which stream was used by cuFFT calls.
In the migrated code one or more commit calls need to be used, but the Intel® DPC++ Compatibility Tool could not deduce how to generate the correct set of commit calls.

For example, this original CUDA* code:

  cufftPlan1d(plan, ...);
  cufftExecR2C(plan, ...); // this call is using default stream
  cufftSetStream(plan, s2);
  cufftExecR2C(plan, ...); // this call is using s2 stream

results in the following migrated SYCL* code:

  /*
  DPCT1075:0: Migration of cuFFT calls may be incorrect and requires review.
  */
  plan->commit(*s2); // wrong queue is used
  ...
  dft::compute_forward (...);
  ...                                  // missing commit call
  dft::compute_forward(...);

which is manually adjusted to:

  plan->commit(dpct::get_default_queue()); // using default queue
  ...
  dft::compute_forward (...);
  ...
  plan->commit(*s2); // added new commit call with *s2 queue
  dft::compute_forward(...);

Suggestions to Fix

Check that oneapi::mkl::dft::descriptor::commit() calls were generated correctly and are using the correct queue parameter. Fix the code if needed by adding missing commit calls and adjusting queue parameters.

Refer to the descriptor<precision, domain>::commit function for more information.

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Intel® DPC++ Compatibility Tool Developer Guide and Reference

DPCT1075

Message

Detailed Help

Suggestions to Fix