DPCT1097

Intel® DPC++ Compatibility Tool Developer Guide and Reference

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ID 768918

Date 7/13/2023

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Public

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DPCT1097

Message

The function <backward function name> may require the workspace used to save intermediate results from function <forward function name>. By default, a workspace from engine_ext is selected according to the source data pointer, but this may be incorrect and cause a workspace data race. You may need to rewrite this code.

Detailed Help

You can manually pass a dnnl::memory object generated from the forward function to the backward function.

For example, this original CUDA* code:

  cudnnLRNCrossChannelForward(handle, ...);
  ...
  cudnnLRNCrossChannelBackward(handle, ...);

results in the following migrated SYCL* code:

  handle.lrn_forward(...);
  ...
  handle.lrn_backward(...);

which is manually adjusted to:

  dnnl::memory workspace;
  handle.lrn_forward(..., &workspace);
  ...
  handle.lrn_backward(..., &workspace);

Suggestions to Fix

You may need to adjust the original code.

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Intel® DPC++ Compatibility Tool Developer Guide and Reference

DPCT1097

Message

Detailed Help

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