mmengine/tests/test_model/test_model_utils.py

78 lines
2.6 KiB
Python

# Copyright (c) OpenMMLab. All rights reserved.
import os
import pytest
import torch
import torch.nn as nn
from torch.distributed import destroy_process_group, init_process_group
from torch.nn.parallel import DataParallel, DistributedDataParallel
from mmengine.model import (MMDistributedDataParallel,
MMSeparateDistributedDataParallel,
is_model_wrapper, revert_sync_batchnorm)
from mmengine.registry import MODEL_WRAPPERS, Registry
@pytest.mark.skipif(
torch.__version__ == 'parrots', reason='not supported in parrots now')
def test_revert_syncbn():
# conv = ConvModule(3, 8, 2, norm_cfg=dict(type='SyncBN'))
conv = nn.Sequential(nn.Conv2d(3, 8, 2), nn.SyncBatchNorm(8))
x = torch.randn(1, 3, 10, 10)
# Expect a ValueError prompting that SyncBN is not supported on CPU
with pytest.raises(ValueError):
y = conv(x)
conv = revert_sync_batchnorm(conv)
y = conv(x)
assert y.shape == (1, 8, 9, 9)
def test_is_model_wrapper():
# Test basic module wrapper.
os.environ['MASTER_ADDR'] = '127.0.0.1'
os.environ['MASTER_PORT'] = '29510'
os.environ['RANK'] = str(0)
init_process_group(backend='gloo', rank=0, world_size=1)
model = nn.Linear(1, 1)
for wrapper in [
DistributedDataParallel, MMDistributedDataParallel,
MMSeparateDistributedDataParallel, DataParallel
]:
wrapper_model = wrapper(model)
assert is_model_wrapper(wrapper_model)
# Test `is_model_wrapper` can check model wrapper registered in custom
# registry.
CHILD_REGISTRY = Registry('test_is_model_wrapper', parent=MODEL_WRAPPERS)
class CustomModelWrapper(nn.Module):
def __init__(self, model):
super().__init__()
self.module = model
pass
CHILD_REGISTRY.register_module(module=CustomModelWrapper)
for wrapper in [
DistributedDataParallel, MMDistributedDataParallel,
MMSeparateDistributedDataParallel, DataParallel, CustomModelWrapper
]:
wrapper_model = wrapper(model)
assert is_model_wrapper(wrapper_model)
# Test `is_model_wrapper` will not check model wrapper in parent
# registry from a child registry.
for wrapper in [
DistributedDataParallel, MMDistributedDataParallel,
MMSeparateDistributedDataParallel, DataParallel
]:
wrapper_model = wrapper(model)
assert not is_model_wrapper(wrapper_model, registry=CHILD_REGISTRY)
wrapper_model = CustomModelWrapper(model)
assert is_model_wrapper(wrapper_model, registry=CHILD_REGISTRY)
destroy_process_group()