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fix #1316

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Former-commit-id: f4e4a04529a60b4c4ccc66cbf67f6e951fbc68d3
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hiyouga 2023-10-31 11:32:08 +08:00
parent 8fb1c94632
commit 6493f6d2e9
3 changed files with 11 additions and 20 deletions
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6
src/llmtuner/extras/template.py
View File

@ -249,7 +249,7 @@ register_template(
"{{system}}" "{{system}}"
], ],
prompt=[ prompt=[
"Human: {{query}}\nAssistant: " "Human: {{query}}\nAssistant:"
], ],
system=( system=(
"A chat between a curious user and an artificial intelligence assistant. " "A chat between a curious user and an artificial intelligence assistant. "
@ -272,7 +272,7 @@ register_template(
"<<SYS>>\n{{system}}\n<</SYS>>\n\n" "<<SYS>>\n{{system}}\n<</SYS>>\n\n"
], ],
prompt=[ prompt=[
"[INST] {{query}} [/INST] " "[INST] {{query}} [/INST]"
], ],
system=( system=(
"You are a helpful, respectful and honest assistant. " "You are a helpful, respectful and honest assistant. "
@ -298,7 +298,7 @@ register_template(
"<<SYS>>\n{{system}}\n<</SYS>>\n\n" "<<SYS>>\n{{system}}\n<</SYS>>\n\n"
], ],
prompt=[ prompt=[
"[INST] {{query}} [/INST] " "[INST] {{query}} [/INST]"
], ],
system="You are a helpful assistant. 你是一个乐于助人的助手。", system="You are a helpful assistant. 你是一个乐于助人的助手。",
sep=[] sep=[]

23
src/llmtuner/tuner/sft/trainer.py
View File

@ -35,26 +35,18 @@ class CustomSeq2SeqTrainer(Seq2SeqTrainer):
""" """
if self.args.predict_with_generate: if self.args.predict_with_generate:
assert self.tokenizer.padding_side == "left", "This method only accepts left-padded tensor." assert self.tokenizer.padding_side == "left", "This method only accepts left-padded tensor."
assert self.tokenizer.pad_token_id is not None, "Pad token is required."
prompt_len, label_len = inputs["input_ids"].size(-1), inputs["labels"].size(-1) prompt_len, label_len = inputs["input_ids"].size(-1), inputs["labels"].size(-1)
labels = inputs["labels"].clone()
if prompt_len > label_len: if prompt_len > label_len:
inputs["labels"] = self._pad_tensors_to_target_len(inputs["labels"], inputs["input_ids"]) inputs["labels"] = self._pad_tensors_to_target_len(inputs["labels"], inputs["input_ids"])
if label_len > prompt_len: if label_len > prompt_len:
inputs["input_ids"] = self._pad_tensors_to_target_len(inputs["input_ids"], inputs["labels"]) inputs["labels"] = inputs["labels"][:, :prompt_len] # truncate the labels instead of padding the inputs
if "attention_mask" in inputs:
inputs["attention_mask"] = self._pad_tensors_to_target_len(
inputs["attention_mask"], inputs["labels"], pad_token_id=0
)
if "position_ids" in inputs:
inputs["position_ids"] = self._pad_tensors_to_target_len(
inputs["position_ids"], inputs["labels"], pad_token_id=0
)
loss, generated_tokens, labels = super().prediction_step( loss, generated_tokens, _ = super().prediction_step(
model, inputs, prediction_loss_only=prediction_loss_only, ignore_keys=ignore_keys model, inputs, prediction_loss_only=prediction_loss_only, ignore_keys=ignore_keys
) )
if generated_tokens is not None and self.args.predict_with_generate: if generated_tokens is not None and self.args.predict_with_generate:
generated_tokens[:, :max(prompt_len, label_len)] = self.tokenizer.pad_token_id generated_tokens[:, :prompt_len] = self.tokenizer.pad_token_id
generated_tokens = generated_tokens.contiguous() generated_tokens = generated_tokens.contiguous()
return loss, generated_tokens, labels return loss, generated_tokens, labels
@ -62,14 +54,13 @@ class CustomSeq2SeqTrainer(Seq2SeqTrainer):
def _pad_tensors_to_target_len( def _pad_tensors_to_target_len(
self, self,
src_tensor: torch.Tensor, src_tensor: torch.Tensor,
tgt_tensor: torch.Tensor, tgt_tensor: torch.Tensor
pad_token_id: Optional[int] = None
) -> torch.Tensor: ) -> torch.Tensor:
r""" r"""
Pads the tensor to the same length as the target tensor. Pads the tensor to the same length as the target tensor.
""" """
pad_token_id = pad_token_id if pad_token_id is not None else self.tokenizer.pad_token_id assert self.tokenizer.pad_token_id is not None, "Pad token is required."
padded_tensor = pad_token_id * torch.ones_like(tgt_tensor) padded_tensor = self.tokenizer.pad_token_id * torch.ones_like(tgt_tensor)
padded_tensor[:, -src_tensor.shape[-1]:] = src_tensor # adopt left-padding padded_tensor[:, -src_tensor.shape[-1]:] = src_tensor # adopt left-padding
return padded_tensor.contiguous() # in contiguous memory return padded_tensor.contiguous() # in contiguous memory

2
src/llmtuner/tuner/sft/workflow.py
View File

@ -33,7 +33,7 @@ def run_sft(
data_collator = DataCollatorForSeq2Seq( data_collator = DataCollatorForSeq2Seq(
tokenizer=tokenizer, tokenizer=tokenizer,
pad_to_multiple_of=4, # for shift short attention pad_to_multiple_of=4 if tokenizer.padding_side == "right" else None, # for shift short attention
label_pad_token_id=IGNORE_INDEX if data_args.ignore_pad_token_for_loss else tokenizer.pad_token_id label_pad_token_id=IGNORE_INDEX if data_args.ignore_pad_token_for_loss else tokenizer.pad_token_id
) )