2020-10-13 11:18:07 +00:00
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# Copyright The PyTorch Lightning team.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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2020-11-01 00:04:25 +00:00
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import time
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2020-10-06 17:54:37 +00:00
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import pytest
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2020-11-01 00:04:25 +00:00
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import pytorch_lightning.utilities.xla_device_utils as xla_utils
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2020-12-02 13:05:11 +00:00
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from pytorch_lightning.utilities import XLA_AVAILABLE, TPU_AVAILABLE
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2020-10-06 17:54:37 +00:00
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from tests.base.develop_utils import pl_multi_process_test
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2020-11-26 23:37:48 +00:00
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if XLA_AVAILABLE:
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2020-10-06 17:54:37 +00:00
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import torch_xla.core.xla_model as xm
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2020-11-01 00:04:25 +00:00
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2020-10-06 17:54:37 +00:00
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2020-12-02 13:05:11 +00:00
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# lets hope that in or env we have installed XLA only for TPU devices, otherwise, it is testing in the cycle "if I am true test that I am true :D"
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2020-10-06 17:54:37 +00:00
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@pytest.mark.skipif(XLA_AVAILABLE, reason="test requires torch_xla to be absent")
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def test_tpu_device_absence():
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"""Check tpu_device_exists returns None when torch_xla is not available"""
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2020-11-01 00:04:25 +00:00
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assert xla_utils.XLADeviceUtils.tpu_device_exists() is None
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2020-10-06 17:54:37 +00:00
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2020-12-02 13:05:11 +00:00
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@pytest.mark.skipif(not TPU_AVAILABLE, reason="test requires torch_xla to be installed")
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@pl_multi_process_test
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2020-10-06 17:54:37 +00:00
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def test_tpu_device_presence():
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"""Check tpu_device_exists returns True when TPU is available"""
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2020-11-01 00:04:25 +00:00
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assert xla_utils.XLADeviceUtils.tpu_device_exists() is True
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2020-10-06 17:54:37 +00:00
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2020-12-02 13:05:11 +00:00
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def test_result_returns_within_20_seconds():
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2020-11-01 00:04:25 +00:00
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"""Check that pl_multi_process returns within 10 seconds"""
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start = time.time()
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result = xla_utils.pl_multi_process(time.sleep)(25)
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end = time.time()
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elapsed_time = int(end - start)
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2020-12-02 13:05:11 +00:00
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assert elapsed_time <= 20
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2020-11-01 00:04:25 +00:00
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assert result is False
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