245 lines
7.8 KiB
Python
245 lines
7.8 KiB
Python
import os
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import pytest
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from torch.utils.data import DataLoader
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import tests.base.develop_pipelines as tpipes
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from pytorch_lightning import Trainer
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from pytorch_lightning.utilities.exceptions import MisconfigurationException
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from tests.base import EvalModelTemplate
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from tests.base.datasets import TrialMNIST
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from tests.base.develop_utils import pl_multi_process_test
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try:
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import torch_xla
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import torch_xla.distributed.xla_multiprocessing as xmp
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SERIAL_EXEC = xmp.MpSerialExecutor()
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# TODO: The tests are aborted if the following lines are uncommented. Must be resolved with XLA team
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# device = torch_xla.core.xla_model.xla_device()
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# device_type = torch_xla.core.xla_model.xla_device_hw(device)
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# TPU_AVAILABLE = device_type == 'TPU'
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except ImportError:
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TPU_AVAILABLE = False
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else:
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TPU_AVAILABLE = True
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_LARGER_DATASET = TrialMNIST(download=True, num_samples=2000, digits=(0, 1, 2, 5, 8))
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# 8 cores needs a big dataset
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def _serial_train_loader():
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return DataLoader(_LARGER_DATASET, batch_size=32)
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@pytest.mark.skipif(not TPU_AVAILABLE, reason="test requires TPU machine")
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@pl_multi_process_test
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def test_model_tpu_cores_1(tmpdir):
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"""Make sure model trains on TPU."""
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trainer_options = dict(
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default_root_dir=tmpdir,
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progress_bar_refresh_rate=0,
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max_epochs=1,
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distributed_backend='tpu',
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tpu_cores=1,
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limit_train_batches=0.4,
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limit_val_batches=0.4,
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)
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model = EvalModelTemplate()
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tpipes.run_model_test(trainer_options, model, on_gpu=False, with_hpc=False)
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@pytest.mark.parametrize('tpu_core', [1, 5])
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@pytest.mark.skipif(not TPU_AVAILABLE, reason="test requires TPU machine")
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@pl_multi_process_test
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def test_model_tpu_index(tmpdir, tpu_core):
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"""Make sure model trains on TPU."""
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trainer_options = dict(
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default_root_dir=tmpdir,
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progress_bar_refresh_rate=0,
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max_epochs=1,
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distributed_backend='tpu',
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tpu_cores=[tpu_core],
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limit_train_batches=0.4,
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limit_val_batches=0.4,
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)
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model = EvalModelTemplate()
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tpipes.run_model_test(trainer_options, model, on_gpu=False, with_hpc=False)
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assert torch_xla._XLAC._xla_get_default_device() == f'xla:{tpu_core}'
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@pytest.mark.skipif(not TPU_AVAILABLE, reason="test requires TPU machine")
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@pl_multi_process_test
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def test_model_tpu_cores_8(tmpdir):
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"""Make sure model trains on TPU."""
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trainer_options = dict(
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default_root_dir=tmpdir,
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progress_bar_refresh_rate=0,
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max_epochs=1,
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distributed_backend='tpu',
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tpu_cores=8,
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limit_train_batches=0.4,
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limit_val_batches=0.4,
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)
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model = EvalModelTemplate()
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# 8 cores needs a big dataset
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model.train_dataloader = _serial_train_loader
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model.val_dataloader = _serial_train_loader
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tpipes.run_model_test(trainer_options, model, on_gpu=False, with_hpc=False)
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@pytest.mark.skipif(not TPU_AVAILABLE, reason="test requires TPU machine")
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@pl_multi_process_test
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def test_model_16bit_tpu_cores_1(tmpdir):
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"""Make sure model trains on TPU."""
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trainer_options = dict(
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default_root_dir=tmpdir,
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precision=16,
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progress_bar_refresh_rate=0,
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max_epochs=1,
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distributed_backend='tpu',
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tpu_cores=1,
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limit_train_batches=0.4,
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limit_val_batches=0.4,
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)
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model = EvalModelTemplate()
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tpipes.run_model_test(trainer_options, model, on_gpu=False)
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assert os.environ.get('XLA_USE_BF16') == str(1), "XLA_USE_BF16 was not set in environment variables"
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@pytest.mark.parametrize('tpu_core', [1, 5])
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@pytest.mark.skipif(not TPU_AVAILABLE, reason="test requires TPU machine")
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@pl_multi_process_test
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def test_model_16bit_tpu_index(tmpdir, tpu_core):
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"""Make sure model trains on TPU."""
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trainer_options = dict(
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default_root_dir=tmpdir,
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precision=16,
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progress_bar_refresh_rate=0,
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train_percent_check=0.4,
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val_percent_check=0.2,
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max_epochs=1,
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distributed_backend='tpu',
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tpu_cores=[tpu_core],
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limit_train_batches=0.4,
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limit_val_batches=0.4,
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)
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model = EvalModelTemplate()
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tpipes.run_model_test(trainer_options, model, on_gpu=False)
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assert torch_xla._XLAC._xla_get_default_device() == f'xla:{tpu_core}'
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assert os.environ.get('XLA_USE_BF16') == str(1), "XLA_USE_BF16 was not set in environment variables"
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@pytest.mark.skipif(not TPU_AVAILABLE, reason="test requires TPU machine")
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@pl_multi_process_test
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def test_model_16bit_tpu_cores_8(tmpdir):
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"""Make sure model trains on TPU."""
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trainer_options = dict(
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default_root_dir=tmpdir,
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precision=16,
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progress_bar_refresh_rate=0,
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max_epochs=1,
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distributed_backend='tpu',
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tpu_cores=8,
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limit_train_batches=0.4,
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limit_val_batches=0.4,
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)
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model = EvalModelTemplate()
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# 8 cores needs a big dataset
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model.train_dataloader = _serial_train_loader
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model.val_dataloader = _serial_train_loader
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tpipes.run_model_test(trainer_options, model, on_gpu=False, with_hpc=False)
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@pytest.mark.skipif(not TPU_AVAILABLE, reason="test requires TPU machine")
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@pl_multi_process_test
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def test_model_tpu_early_stop(tmpdir):
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"""Test if single TPU core training works"""
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model = EvalModelTemplate()
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trainer = Trainer(
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early_stop_callback=True,
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default_root_dir=tmpdir,
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progress_bar_refresh_rate=0,
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max_epochs=50,
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limit_train_batches=10,
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limit_val_batches=10,
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distributed_backend='tpu',
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tpu_cores=1,
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)
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trainer.fit(model)
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@pytest.mark.skipif(not TPU_AVAILABLE, reason="test requires TPU machine")
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@pl_multi_process_test
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def test_tpu_grad_norm(tmpdir):
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"""Test if grad_norm works on TPU."""
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trainer_options = dict(
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default_root_dir=tmpdir,
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progress_bar_refresh_rate=0,
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max_epochs=1,
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distributed_backend='tpu',
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tpu_cores=1,
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limit_train_batches=0.4,
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limit_val_batches=0.4,
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gradient_clip_val=0.1,
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)
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model = EvalModelTemplate()
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tpipes.run_model_test(trainer_options, model, on_gpu=False, with_hpc=False)
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@pytest.mark.skipif(not TPU_AVAILABLE, reason="test requires TPU machine")
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@pl_multi_process_test
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def test_dataloaders_passed_to_fit(tmpdir):
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"""Test if dataloaders passed to trainer works on TPU"""
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model = EvalModelTemplate()
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trainer = Trainer(default_root_dir=tmpdir, max_epochs=1, distributed_backend='tpu', tpu_cores=8)
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result = trainer.fit(model, train_dataloader=model.train_dataloader(), val_dataloaders=model.val_dataloader())
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assert result, "TPU doesn't work with dataloaders passed to fit()."
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@pytest.mark.parametrize(
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['tpu_cores', 'expected_tpu_id'],
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[pytest.param(1, None), pytest.param(8, None), pytest.param([1], 1), pytest.param([8], 8)],
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)
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def test_tpu_id_to_be_as_expected(tpu_cores, expected_tpu_id):
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"""Test if trainer.tpu_id is set as expected"""
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assert Trainer(tpu_cores=tpu_cores).tpu_id == expected_tpu_id
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def test_tpu_misconfiguration():
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"""Test if trainer.tpu_id is set as expected"""
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with pytest.raises(MisconfigurationException, match="`tpu_cores` can only be"):
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Trainer(
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tpu_cores=[1, 8], distributed_backend='tpu',
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)
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# @patch('pytorch_lightning.trainer.trainer.XLA_AVAILABLE', False)
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@pytest.mark.skipif(TPU_AVAILABLE, reason="test requires missing TPU")
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def test_exception_when_no_tpu_found(tmpdir):
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"""Test if exception is thrown when xla devices are not available"""
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model = EvalModelTemplate()
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trainer = Trainer(
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default_root_dir=tmpdir,
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max_epochs=1,
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train_percent_check=0.4,
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val_percent_check=0.2,
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distributed_backend='tpu',
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tpu_cores=8,
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)
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with pytest.raises(MisconfigurationException, match='PyTorch XLA not installed.'):
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trainer.fit(model)
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