set mixed_precision="fp16",but the model is not fp16

[starinskycc]

Describe the bug

I trained the control net of SDXL using the mixed prediction="fp16" parameter, but the trained model did not have the suffix. fp16. safetensors. But it's a 5G file. I see that the Controlnet on HuggFace will have a 5G file and a 2.5G file with fp16.

Reproduction

accelerate launch train_controlnet_sdxl.py --pretrained_model_name_or_path=$MODEL_DIR --output_dir=$OUTPUT_DIR --pretrained_vae_model_name_or_path=$VAE --dataset_name=/root/autodl-tmp/datasets/ --mixed_precision="fp16" --resolution=1024 --learning_rate=1e-5 --max_train_steps=20000 --validation_image "/root/test.jpg" --validation_prompt "bedroom" --validation_steps=500 --train_batch_size=2 --gradient_accumulation_steps=4 --report_to="wandb" --seed=42 --checkpointing_steps=2000 --cache_dir=/root/autodl-tmp/cache/

Logs

No response

System Info

diffuser 0.28 , linux, python 3.10.11

Who can help?

No response

[starinskycc]

not set

[starinskycc]

As long as I set --variant=fp16, can I output the ".fp16.safetensors" model ?

[bghira]

it's kind of annoying currently to actually export fp16 weights, but with just a few lines of python, you will have it done easily:

from diffusers.pipelines import DiffusionPipeline
import torch

model_id = 'username/model-name'
output_dir = '/path/to/new/pipeline'

pipeline = DiffusionPipeline.from_pretrained(model_id, torch_dtype=torch.float16)
pipeline.save_pretrained(output_dir, use_safetensors=True)

note that the name won't include '.fp16.' but you can manually rename it to include.

[starinskycc]

it's kind of annoying currently to actually export fp16 weights, but with just a few lines of python, you will have it done easily:

from diffusers.pipelines import DiffusionPipeline
import torch

model_id = 'username/model-name'
output_dir = '/path/to/new/pipeline'

pipeline = DiffusionPipeline.from_pretrained(model_id, torch_dtype=torch.float16)
pipeline.save_pretrained(output_dir, use_safetensors=True)

note that the name won't include '.fp16.' but you can manually rename it to include.

thank u

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