dpo代码bug

[hizening]

https://github.com/FunAudioLLM/CosyVoice/blob/b048a2d6dbdced56db289d3d3b843ca5496ea7e6/cosyvoice/utils/executor.py#L169 total_loss_dict[k].append(v.item() * num_utts)是否应该修改成 total_loss_dict[k].append(v.sum().item() * num_utts)，会报错

[aluminumbox]

是的，可以改成v.mean().item()

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