43 lines
1.6 KiB
Python
43 lines
1.6 KiB
Python
# Copyright The PyTorch Lightning 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 lightning_lite.strategies import DDPStrategy
|
|
|
|
|
|
@pytest.mark.parametrize(
|
|
["process_group_backend", "device_str", "expected_process_group_backend"],
|
|
[
|
|
pytest.param("foo", "cpu", "foo"),
|
|
pytest.param("foo", "cuda:0", "foo"),
|
|
pytest.param(None, "cuda:0", "nccl"),
|
|
pytest.param(None, "cpu", "gloo"),
|
|
],
|
|
)
|
|
def test_ddp_process_group_backend(process_group_backend, device_str, expected_process_group_backend):
|
|
"""Test settings for process group backend."""
|
|
|
|
class MockDDPStrategy(DDPStrategy):
|
|
def __init__(self, root_device, process_group_backend):
|
|
self._root_device = root_device
|
|
super().__init__(process_group_backend=process_group_backend)
|
|
|
|
@property
|
|
def root_device(self):
|
|
return self._root_device
|
|
|
|
strategy = MockDDPStrategy(process_group_backend=process_group_backend, root_device=torch.device(device_str))
|
|
assert strategy._get_process_group_backend() == expected_process_group_backend
|