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"""Modified from https://github.com/kijai/ComfyUI-MochiWrapper
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"""
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import torch
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import torch.nn as nn
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def autocast_model_forward(cls, origin_dtype, *inputs, **kwargs):
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weight_dtype = cls.weight.dtype
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cls.to(origin_dtype)
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inputs = [input.to(origin_dtype) for input in inputs]
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out = cls.original_forward(*inputs, **kwargs)
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cls.to(weight_dtype)
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return out
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def replace_parameters_by_name(module, name_keywords, device):
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from torch import nn
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for name, param in list(module.named_parameters(recurse=False)):
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if any(keyword in name for keyword in name_keywords):
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if isinstance(param, nn.Parameter):
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tensor = param.data
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delattr(module, name)
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setattr(module, name, tensor.to(device=device))
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for child_name, child_module in module.named_children():
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replace_parameters_by_name(child_module, name_keywords, device)
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def convert_model_weight_to_float8(model, exclude_module_name=['embed_tokens']):
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for name, module in model.named_modules():
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flag = False
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for _exclude_module_name in exclude_module_name:
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if _exclude_module_name in name:
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flag = True
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if flag:
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continue
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for param_name, param in module.named_parameters():
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flag = False
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for _exclude_module_name in exclude_module_name:
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if _exclude_module_name in param_name:
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flag = True
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if flag:
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continue
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param.data = param.data.to(torch.float8_e4m3fn)
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def convert_weight_dtype_wrapper(module, origin_dtype):
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for name, module in module.named_modules():
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if name == "" or "embed_tokens" in name:
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continue
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original_forward = module.forward
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if hasattr(module, "weight") and module.weight is not None:
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setattr(module, "original_forward", original_forward)
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setattr(
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module,
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"forward",
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lambda *inputs, m=module, **kwargs: autocast_model_forward(m, origin_dtype, *inputs, **kwargs)
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)
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