tma-illegal-instruction

tma-illegal-instruction is a System & environment troubleshooting skill for AI agents, published by facebookexperimental in the triton repository on GitHub. Skillspace rates tma-illegal-instruction D (59/100) and it passed the safety scan; the rating is based on static analysis only.

Diagnose CUDA "illegal instruction" / kernel crashes on Triton kernels that reference to TMA loads or stores (`make_tensor_descriptor`, `TensorDescriptor`, `descriptor.load`, `descriptor.store`, `tl.async_descriptor_load`, async TMA copies) as the source code line. Use when the user reports CUDA error 716, "an illegal instruction was encountered", segfault inside a TMA op, kernel hang followed by an illegal instruction trap, or a crash that only fires on the first or last tile of a launch. Covers the pattern where a TMA store/load is issued at an offset entirely past a tensor's shape — TMA does NOT silently mask out-of-bounds tile accesses; it traps. The root cause is almost never "missing in-kernel mask" — it is commonly a structural launcher / tile-mapping bug.

Grade

D

Quality

59 / 100

Safety

Passed

GitHub stars

178

Unproven: rated by static analysis only, not yet compared head-to-head.

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