Reduce iteration space ranges from 3 dimensions

UCL / openqcd-oneapi

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Reduce iteration space ranges from 3 dimensions #12

Closed tkoskela closed 2 years ago

tkoskela commented 2 years ago

Investigate nd_range<3> and nd_item<3> produced by dpct. Can these be reduced to 1 dimension?

tkoskela commented 2 years ago

The code currently uses a global size VOLUME/2 and a local size 128. These are passed to the CUDA kernels. The SYCL code generated by dpct mimics this behaviour by passing a local and a global size to the nd_range. The simplest approach is to just reduce the local and global ranges to 1D. It could be interesting to just pass simple 1D ranges to the lambda functions in sycl.