DPCT1097

Intel® DPC++ Compatibility Tool Developer Guide and Reference

Download PDF

ID 768918

Date 11/07/2023

Version

Public

A newer version of this document is available. Customers should click here to go to the newest version.

Visible to Intel only — GUID: GUID-1E267089-7F2F-4365-BB59-68EB177EC868

View Details

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.

Select Your Language

Using Intel.com Search

Quick Links

Recent Searches

Advanced Search

Only search in

Intel® DPC++ Compatibility Tool Developer Guide and Reference

DPCT1097

Message

Detailed Help

Suggestions to Fix