Stale comment in `examples/cute/tutorial/hopper/wgmma_sm90.cu`

Open Beginner friendly

#3,340 opened on Jun 22, 2026 4 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 1/5
Estimated time: Under an hour
Newbie friendliness: 90/100

Issue type: Documentation
Clarity: Clearly specified
Activity status: Active
Tech stack: cpp
Domain: documentation

Research direction

Open examples/cute/tutorial/hopper/wgmma_sm90.cu and inspect the gemm_nt tiled copyA and copyB definitions. Correct the stale thread-layout comments to match the shown 16x8 layouts, then review the surrounding example to ensure both comments are consistent. Done means the comments no longer say 32x4 while the code uses 16x8.

Written by the indexing model from the issue text.

Description

? - Needs Triage CUTLASS C++ documentation inactive-30d

The comment for the gemm_nt's tiled copyA/B says the thread layout used is 32x4, but the used thread layout is 16x8.

  // Define the thread layouts (static)
  TiledCopy copyA = make_tiled_copy(Copy_Atom<SM80_CP_ASYNC_CACHEALWAYS<uint128_t>, TA>{},
                                    Layout<Shape<_16,_8>>{}, // Thr layout 32x4 m-major
                                    Layout<Shape< _8,_1>>{});// Val layout  8x1 m-major
  TiledCopy copyB = make_tiled_copy(Copy_Atom<SM80_CP_ASYNC_CACHEALWAYS<uint128_t>, TB>{},
                                    Layout<Shape<_16,_8>>{}, // Thr layout 32x4 n-major
                                    Layout<Shape< _8,_1>>{});// Val layout  8x1 n-major

Dominant language: C++
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