def test_strict_model_load_more_params(monkeypatch, tmpdir, tmpdir_server,
url_ckpt):
"""Tests use case where trainer saves the model, and user loads it from tags independently."""
# set $TORCH_HOME, which determines torch hub's cache path, to tmpdir
monkeypatch.setenv('TORCH_HOME', tmpdir)
model = BoringModel()
# Extra layer
model.c_d3 = torch.nn.Linear(32, 32)
# logger file to get meta
logger = tutils.get_default_logger(tmpdir)
# fit model
trainer = Trainer(
default_root_dir=tmpdir,
max_epochs=1,
limit_train_batches=2,
limit_val_batches=2,
logger=logger,
callbacks=[ModelCheckpoint(dirpath=tmpdir)],
)
trainer.fit(model)
# traning complete
assert trainer.state == TrainerState.FINISHED, f"Training failed with {trainer.state}"
# save model
new_weights_path = os.path.join(tmpdir, 'save_test.ckpt')
trainer.save_checkpoint(new_weights_path)
# load new model
hparams_path = os.path.join(tutils.get_data_path(logger, path_dir=tmpdir),
'hparams.yaml')
hparams_url = f'http://{tmpdir_server[0]}:{tmpdir_server[1]}/{os.path.basename(new_weights_path)}'
ckpt_path = hparams_url if url_ckpt else new_weights_path
BoringModel.load_from_checkpoint(
checkpoint_path=ckpt_path,
hparams_file=hparams_path,
strict=False,
)
with pytest.raises(
RuntimeError,
match=
r'Unexpected key\(s\) in state_dict: "c_d3.weight", "c_d3.bias"'):
BoringModel.load_from_checkpoint(
checkpoint_path=ckpt_path,
hparams_file=hparams_path,
strict=True,
)
def run_test_from_config(trainer_options, on_gpu, check_size=True):
"""Trains the default model with the given config."""
set_random_master_port()
reset_seed()
ckpt_path = trainer_options["weights_save_path"]
trainer_options.update(callbacks=[ModelCheckpoint(dirpath=ckpt_path)])
class TestModel(BoringModel):
def on_train_start(self) -> None:
expected_device = torch.device("cuda", self.trainer.local_rank) if on_gpu else torch.device("cpu")
assert self.device == expected_device
def training_epoch_end(self, outputs) -> None:
res = self.trainer.training_type_plugin.reduce(torch.tensor(1.0, device=self.device), reduce_op="sum")
assert res.sum() == self.trainer.training_type_plugin.world_size
model = TestModel()
trainer = Trainer(**trainer_options)
trainer.fit(model)
assert trainer.state.finished, f"Training failed with {trainer.state}"
trainer.test(model)
assert model.device == torch.device("cpu")
# Horovod should be initialized following training. If not, this will raise an exception.
if check_size:
assert hvd.size() == 2
if trainer.global_rank > 0:
return
# test model loading
pretrained_model = BoringModel.load_from_checkpoint(trainer.checkpoint_callback.best_model_path)
# test new model accuracy
test_loaders = model.test_dataloader()
if not isinstance(test_loaders, list):
test_loaders = [test_loaders]
for dataloader in test_loaders:
batch = next(iter(dataloader))
pretrained_model(batch)
# test HPC saving
trainer.checkpoint_connector.hpc_save(ckpt_path, trainer.logger)
# test HPC loading
checkpoint_path = trainer.checkpoint_connector.get_max_ckpt_path_from_folder(ckpt_path)
trainer.checkpoint_connector.restore(checkpoint_path)
if on_gpu:
trainer = Trainer(gpus=1, accelerator="horovod", max_epochs=1)
# Test the root_gpu property
assert trainer.root_gpu == hvd.local_rank()
def test_model_saving_loading(tmpdir):
"""Tests use case where trainer saves the model, and user loads it from tags independently."""
model = BoringModel()
# logger file to get meta
logger = tutils.get_default_logger(tmpdir)
# fit model
trainer = Trainer(
max_epochs=1,
limit_train_batches=2,
limit_val_batches=2,
logger=logger,
callbacks=[ModelCheckpoint(dirpath=tmpdir)],
default_root_dir=tmpdir,
)
trainer.fit(model)
# traning complete
assert trainer.state == TrainerState.FINISHED, f"Training failed with {trainer.state}"
# make a prediction
dataloaders = model.test_dataloader()
if not isinstance(dataloaders, list):
dataloaders = [dataloaders]
batch = next(iter(dataloaders[0]))
# generate preds before saving model
model.eval()
pred_before_saving = model(batch)
# save model
new_weights_path = os.path.join(tmpdir, 'save_test.ckpt')
trainer.save_checkpoint(new_weights_path)
# load new model
hparams_path = tutils.get_data_path(logger, path_dir=tmpdir)
hparams_path = os.path.join(hparams_path, 'hparams.yaml')
model_2 = BoringModel.load_from_checkpoint(
checkpoint_path=new_weights_path,
hparams_file=hparams_path,
)
model_2.eval()
# make prediction
# assert that both predictions are the same
new_pred = model_2(batch)
assert torch.all(torch.eq(pred_before_saving, new_pred)).item() == 1
def run_test_from_config(trainer_options, on_gpu, check_size=True):
"""Trains the default model with the given config."""
set_random_master_port()
reset_seed()
ckpt_path = trainer_options['weights_save_path']
trainer_options.update(callbacks=[ModelCheckpoint(dirpath=ckpt_path)])
model = BoringModel()
trainer = Trainer(**trainer_options)
trainer.fit(model)
assert trainer.state == TrainerState.FINISHED, f"Training failed with {trainer.state}"
# Horovod should be initialized following training. If not, this will raise an exception.
if check_size:
assert hvd.size() == 2
if trainer.global_rank > 0:
return
# test model loading
pretrained_model = BoringModel.load_from_checkpoint(
trainer.checkpoint_callback.best_model_path)
# test new model accuracy
test_loaders = model.test_dataloader()
if not isinstance(test_loaders, list):
test_loaders = [test_loaders]
for dataloader in test_loaders:
batch = next(iter(dataloader))
pretrained_model(batch)
# test HPC saving
trainer.checkpoint_connector.hpc_save(ckpt_path, trainer.logger)
# test HPC loading
checkpoint_path = trainer.checkpoint_connector.get_max_ckpt_path_from_folder(
ckpt_path)
trainer.checkpoint_connector.hpc_load(checkpoint_path, on_gpu=on_gpu)
if on_gpu:
trainer = Trainer(gpus=1, accelerator='horovod', max_epochs=1)
# Test the root_gpu property
assert trainer.root_gpu == hvd.local_rank()
