29 lines
1.0 KiB
Python
29 lines
1.0 KiB
Python
import torch
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# Utility class that stores detached, named losses in a rotating buffer for smooth metric outputting.
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class LossAccumulator:
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def __init__(self, buffer_sz=50):
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self.buffer_sz = buffer_sz
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self.buffers = {}
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def add_loss(self, name, tensor):
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if name not in self.buffers.keys():
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self.buffers[name] = (0, torch.zeros(self.buffer_sz), False)
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i, buf, filled = self.buffers[name]
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# Can take tensors or just plain python numbers.
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if isinstance(tensor, torch.Tensor):
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buf[i] = tensor.detach().cpu()
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else:
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buf[i] = tensor
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filled = i+1 >= self.buffer_sz or filled
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self.buffers[name] = ((i+1) % self.buffer_sz, buf, filled)
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def as_dict(self):
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result = {}
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for k, v in self.buffers.items():
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i, buf, filled = v
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if filled:
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result["loss_" + k] = torch.mean(buf)
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else:
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result["loss_" + k] = torch.mean(buf[:i])
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return result |