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42 lines
1.6 KiB
42 lines
1.6 KiB
from colossalai.tensor.spec import ShardPattern
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import torch
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from colossalai.tensor.op_wrapper import colo_op_impl
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from colossalai.tensor import ColoTensor
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from colossalai.nn.loss.loss_1d import VocabParallelCrossEntropyLoss1D
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@colo_op_impl(torch.nn.functional.cross_entropy)
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def colo_cross_entropy(types, args=(), kwargs=None, pg=None):
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arg_num = len(args)
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if arg_num > 0:
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input_tensor = args[0]
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if arg_num > 1:
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target = args[1]
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if arg_num > 2:
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weight = args[2]
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if 'input' in kwargs:
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input_tensor = kwargs.pop('input')
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if 'target' in kwargs:
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target = kwargs.pop('target')
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if 'weight' in kwargs:
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weight = kwargs.pop('weight')
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if not isinstance(input_tensor, ColoTensor):
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input_tensor = ColoTensor.init_from_torch_tensor(input_tensor)
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if isinstance(target, ColoTensor):
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target = target.torch_tensor()
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if input_tensor.is_gathered(): # Input is gathered
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# TODO(jzy) Shall we make the result of loss function a ColoTensor?
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return ColoTensor.init_from_torch_tensor(torch.nn.functional.cross_entropy(
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input_tensor.torch_tensor(), target, weight))
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elif input_tensor.has_spec() and input_tensor.shard_spec.num_action == 1: # Single Model Parallel Applied
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if input_tensor.shard_pattern == ShardPattern.Col:
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return ColoTensor.init_from_torch_tensor(
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VocabParallelCrossEntropyLoss1D()(input_tensor.torch_tensor(), target))
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else:
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raise NotImplementedError
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else:
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raise NotImplementedError
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