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add upcast_lmhead option

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Former-commit-id: 8cbe4e960983ace47f8b956cdc31411347592129
This commit is contained in:
hiyouga 2024-01-19 23:54:25 +08:00
parent ffde3d94bf
commit edf725208d
2 changed files with 5 additions and 1 deletions
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4
src/llmtuner/hparams/model_args.py
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@ -70,6 +70,10 @@ class ModelArguments:
default=False,
metadata={"help": "Whether or not to upcast the layernorm weights in fp32."}
)
upcast_lmhead_output: Optional[bool] = field(
default=False,
metadata={"help": "Whether or not to upcast the output of lm_head in fp32."}
)
hf_hub_token: Optional[str] = field(
default=None,
metadata={"help": "Auth token to log in with Hugging Face Hub."}

2
src/llmtuner/model/patcher.py
View File

@ -209,7 +209,7 @@ def _prepare_model_for_training(
model.config.use_cache = False # turn off when gradient checkpointing is enabled
logger.info("Gradient checkpointing enabled.")
if hasattr(model, output_layer_name):
if hasattr(model, output_layer_name) and model_args.upcast_lmhead_output:
def fp32_forward_post_hook(module: torch.nn.Module, args: Tuple[torch.Tensor], output: torch.Tensor):
return output.to(torch.float32)