forked from mrq/DL-Art-School
80 lines
2.7 KiB
Python
80 lines
2.7 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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self.counters = {}
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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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if "_histogram" in name:
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tensor = torch.flatten(tensor.detach().cpu())
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self.buffers[name] = (0, torch.zeros((self.buffer_sz, tensor.shape[0])), False)
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else:
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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 '_histogram' in name:
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buf[i] = torch.flatten(tensor.detach().cpu())
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elif 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 increment_metric(self, name):
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if name not in self.counters.keys():
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self.counters[name] = 1
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else:
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self.counters[name] += 1
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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 '_histogram' in k:
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result["loss_" + k] = torch.flatten(buf)
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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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for k, v in self.counters.items():
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result[k] = v
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return result
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# Stores losses in an infinitely-sized list.
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class InfStorageLossAccumulator:
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def __init__(self):
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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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if "_histogram" in name:
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tensor = torch.flatten(tensor.detach().cpu())
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self.buffers[name] = []
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else:
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self.buffers[name] = []
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buf = self.buffers[name]
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# Can take tensors or just plain python numbers.
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if '_histogram' in name:
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buf.append(torch.flatten(tensor.detach().cpu()))
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elif isinstance(tensor, torch.Tensor):
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buf.append(tensor.detach().cpu())
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else:
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buf.append(tensor)
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def increment_metric(self, name):
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pass
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def as_dict(self):
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result = {}
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for k, buf in self.buffers.items():
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if '_histogram' in k:
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result["loss_" + k] = torch.flatten(buf)
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else:
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result["loss_" + k] = torch.mean(torch.stack(buf))
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return result |