[BUG]
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Description
Describe the bug
cuda_exec.out: /content/cutlass/include/cutlass/integer_subbyte.h:96: cutlass::integer_subbyte<Bits, Signed>::integer_subbyte(int) [with int Bits = 4; bool Signed = true]: Assertion `value < upper_bound' failed.
Steps/Code to reproduce bug
A bug encountered in revisiting the examples09 file
Expected behavior
run and no bug
Environment details (please complete the following information):
-- T4 GPU
-- CMake Version: 3.30.2
-- CUTLASS 3.5.1
-- The CXX compiler identification is GNU 11.4.0
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- The CUDA compiler identification is NVIDIA 12.2.140
Additional context
I need help
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with examples09 and the assertion at cutlass/integer_subbyte.h:96, using the reported T4, CUDA 12.2, and CUTLASS 3.5.1 environment. Reproduce the failure and determine what input reaches the signed 4-bit integer_subbyte constructor; done means the example runs without the assertion.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- hpc
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100