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convert : fix autoawq gemma (#6704)

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* fix autoawq quantized gemma model convert error

using autoawq to quantize gemma model will include a lm_head.weight tensor in model-00001-of-00002.safetensors. it result in this situation that convert-hf-to-gguf.py can't map lm_head.weight. skip loading this tensor could prevent this error.

* change code to full string match and print necessary message

change code to full string match and print a short message to inform users that lm_head.weight has been skipped.

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Co-authored-by: Zheng.Deng <32841220+CUGfred@users.noreply.github.com>
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Zheng.Deng 2024-04-17 04:51:07 +08:00 committed by GitHub
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convert-hf-to-gguf.py
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@ -2458,6 +2458,12 @@ class GemmaModel(Model):
tensor_map = gguf.get_tensor_name_map(self.model_arch, block_count)
for name, data_torch in self.get_tensors():
# lm_head is not used in llama.cpp, while autoawq will include this tensor in model
# To prevent errors, skip loading lm_head.weight.
if name == "lm_head.weight":
print(f"Skipping get tensor {name!r} in safetensors so that convert can end normally.")
continue
old_dtype = data_torch.dtype
# convert any unsupported data types to float32