47 lines
1.8 KiB
Python
47 lines
1.8 KiB
Python
# Copyright The Lightning AI 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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import pytest
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from lightning.fabric.accelerators.xla import _XLA_AVAILABLE, XLAAccelerator
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from tests_fabric.helpers.runif import RunIf
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@RunIf(tpu=True)
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def test_auto_device_count():
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# this depends on the chip used, e.g. with v4-8 we expect 4
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# there's no easy way to test it without copying the `auto_device_count` so just check that its greater than 1
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assert XLAAccelerator.auto_device_count() > 1
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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 `is_available` returns True when TPU is available."""
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assert not XLAAccelerator.is_available()
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@pytest.mark.parametrize("devices", [1, 8])
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def test_get_parallel_devices(devices, tpu_available):
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expected = XLAAccelerator.get_parallel_devices(devices)
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assert len(expected) == devices
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def test_get_parallel_devices_raises(tpu_available):
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with pytest.raises(ValueError, match="devices` can only be"):
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XLAAccelerator.get_parallel_devices(0)
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with pytest.raises(ValueError, match="devices` can only be"):
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XLAAccelerator.get_parallel_devices(5)
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with pytest.raises(ValueError, match="Could not parse.*anything-else'"):
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XLAAccelerator.get_parallel_devices("anything-else")
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