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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.
from llamafactory.v1.accelerator.interface import DistributedInterface
from llamafactory.v1.config.arg_parser import get_args
from llamafactory.v1.core.model_engine import ModelEngine
def test_init_on_meta():
model_args, *_ = get_args(
dict(
model="llamafactory/tiny-random-qwen3",
init_config={"name": "init_on_meta"},
)
)
model_engine = ModelEngine(model_args=model_args)
assert model_engine.model.device.type == "meta"
def test_init_on_rank0():
model_args, *_ = get_args(
dict(
model="llamafactory/tiny-random-qwen3",
init_config={"name": "init_on_rank0"},
)
)
model_engine = ModelEngine(model_args=model_args)
if DistributedInterface().get_rank() == 0:
assert model_engine.model.device.type == "cpu"
else:
assert model_engine.model.device.type == "meta"
def test_init_on_default():
model_args, *_ = get_args(
dict(
model="llamafactory/tiny-random-qwen3",
init_config={"name": "init_on_default"},
)
)
model_engine = ModelEngine(model_args=model_args)
assert model_engine.model.device == DistributedInterface().current_device
if __name__ == "__main__":
"""
python tests_v1/plugins/model_plugins/test_init_plugin.py
"""
test_init_on_meta()
test_init_on_rank0()
test_init_on_default()
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