modelscope / modelscope/DiffSynth-Studio
T5 fp8 inference problem
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- Python
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Description
I set t5 for fp8 dtype, but got this error:
DiffSynth-Studio/diffsynth/models/wan_video_text_encoder.py", line 31, in forward
x = x * torch.rsqrt(x.float().pow(2).mean(dim=-1, keepdim=True) +
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
RuntimeError: Promotion for Float8 Types is not supported, attempted to promote Float8_e4m3fn and Float
Due to the .float(), which made dtype error, is that normal?
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Research direction
Start in diffsynth/models/wan_video_text_encoder.py at line 31 and reproduce the T5 fp8 inference error shown in the report. Determine whether the dtype promotion failure is expected there; done means the reported inference path no longer produces this error or the behavior is clearly documented.
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Assessment
- Tech stack
- python, pytorch
- Domain
- machine-learning
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100