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# Copyright 2025 the LlamaFactory team.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import pytest
import torch
from transformers import AutoConfig, AutoModelForVision2Seq
from llamafactory.hparams import FinetuningArguments, ModelArguments
from llamafactory.model.adapter import init_adapter
@pytest.mark.parametrize("freeze_vision_tower", (False, True))
@pytest.mark.parametrize("freeze_multi_modal_projector", (False, True))
@pytest.mark.parametrize("freeze_language_model", (False, True))
def test_visual_full(freeze_vision_tower: bool, freeze_multi_modal_projector: bool, freeze_language_model: bool):
model_args = ModelArguments(model_name_or_path="Qwen/Qwen2-VL-2B-Instruct")
finetuning_args = FinetuningArguments(
finetuning_type="full",
freeze_vision_tower=freeze_vision_tower,
freeze_multi_modal_projector=freeze_multi_modal_projector,
freeze_language_model=freeze_language_model,
)
config = AutoConfig.from_pretrained(model_args.model_name_or_path)
with torch.device("meta"):
model = AutoModelForVision2Seq.from_config(config)
model = init_adapter(config, model, model_args, finetuning_args, is_trainable=True)
for name, param in model.named_parameters():
if any(key in name for key in ["visual.patch_embed", "visual.blocks"]):
assert param.requires_grad != freeze_vision_tower
elif "visual.merger" in name:
assert param.requires_grad != freeze_multi_modal_projector
else:
assert param.requires_grad != freeze_language_model
@pytest.mark.parametrize("freeze_vision_tower", (False, True))
def test_visual_lora(freeze_vision_tower: bool):
model_args = ModelArguments(model_name_or_path="Qwen/Qwen2-VL-2B-Instruct")
finetuning_args = FinetuningArguments(finetuning_type="lora", freeze_vision_tower=freeze_vision_tower)
config = AutoConfig.from_pretrained(model_args.model_name_or_path)
with torch.device("meta"):
model = AutoModelForVision2Seq.from_config(config)
model = init_adapter(config, model, model_args, finetuning_args, is_trainable=True)
trainable_params, frozen_params = set(), set()
for name, param in model.named_parameters():
if param.requires_grad:
trainable_params.add(name)
else:
frozen_params.add(name)
if freeze_vision_tower:
assert "base_model.model.visual.blocks.0.attn.qkv.lora_A.default.weight" not in trainable_params
else:
assert "base_model.model.visual.blocks.0.attn.qkv.lora_A.default.weight" in trainable_params
assert "merger" not in trainable_params
assert "base_model.model.model.layers.0.self_attn.q_proj.lora_A.default.weight" in trainable_params
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