mirror of https://github.com/hpcaitech/ColossalAI
48 lines
1.2 KiB
Python
48 lines
1.2 KiB
Python
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#!/usr/bin/env python
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# -*- encoding: utf-8 -*-
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import torch
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import torch.nn as nn
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from torch import Tensor
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from torch.optim import Optimizer
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from colossalai.utils import clip_grad_norm_fp32
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class ColossalaiOptimizer(Optimizer):
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def __init__(self, optim: Optimizer):
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self.optim = optim
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@property
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def param_groups(self):
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return self.optim.param_groups
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@property
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def defaults(self):
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return self.optim.defaults
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def add_param_group(self, *args, **kwargs):
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return self.optim.add_param_group(*args, **kwargs)
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def step(self, *args, **kwargs):
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return self.optim.step(*args, **kwargs)
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def zero_grad(self, *args, **kwargs):
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self.optim.zero_grad(*args, **kwargs)
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def load_state_dict(self, *args, **kwargs):
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self.optim.load_state_dict(*args, **kwargs)
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def state_dict(self):
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return self.optim.state_dict()
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def backward(self, loss: Tensor):
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loss.backward()
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def backward_by_grad(self, tensor: Tensor, grad: Tensor):
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torch.autograd.backward(tensors=tensor, grad_tensors=grad)
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def clip_grad_norm(self, model: nn.Module, max_norm: float):
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if max_norm > 0.0:
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clip_grad_norm_fp32(model.parameters(), max_norm)
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