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68 行
1.8 KiB
68 行
1.8 KiB
import os
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from distutils.version import LooseVersion
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import pkg_resources
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from mlagents.torch_utils import cpu_utils
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from mlagents.trainers.settings import TorchSettings
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from mlagents_envs.logging_util import get_logger
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logger = get_logger(__name__)
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def assert_torch_installed():
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# Check that torch version 1.6.0 or later has been installed. If not, refer
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# user to the PyTorch webpage for install instructions.
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torch_pkg = None
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try:
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torch_pkg = pkg_resources.get_distribution("torch")
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except pkg_resources.DistributionNotFound:
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pass
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assert torch_pkg is not None and LooseVersion(torch_pkg.version) >= LooseVersion(
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"1.6.0"
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), (
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"A compatible version of PyTorch was not installed. Please visit the PyTorch homepage "
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+ "(https://pytorch.org/get-started/locally/) and follow the instructions to install. "
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+ "Version 1.6.0 and later are supported."
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)
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assert_torch_installed()
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# This should be the only place that we import torch directly.
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# Everywhere else is caught by the banned-modules setting for flake8
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import torch # noqa I201
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torch.set_num_threads(cpu_utils.get_num_threads_to_use())
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os.environ["KMP_BLOCKTIME"] = "0"
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_device = torch.device("cpu")
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def set_torch_config(torch_settings: TorchSettings) -> None:
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global _device
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if torch_settings.device is None:
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device_str = "cuda" if torch.cuda.is_available() else "cpu"
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else:
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device_str = torch_settings.device
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_device = torch.device(device_str)
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if _device.type == "cuda":
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torch.set_default_tensor_type(torch.cuda.FloatTensor)
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else:
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torch.set_default_tensor_type(torch.FloatTensor)
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logger.info(f"default Torch device: {_device}")
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# Initialize to default settings
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set_torch_config(TorchSettings(device=None))
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nn = torch.nn
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def default_device():
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return _device
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