Comments (6)
Hi,
由于不清楚你的任务设定(数据集大小、模型结构、温度以及其他超参等),所以很难给出一个准确判断。
不过从图上看,loss几乎降到了0,这点似乎不太正常,是训练集太小吗?
另外,有没有测试教师/学生模型的性能(F1或Acc指标)?有时loss说明不了太多问题
基于已有的信息,我建议搭建baseline模型做对比,比如移除crf层,不使用中间损失,看看效果如何。
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感谢您的回答
teacher使用的是Robert (12层)+crf,student 是bilstm+crf ,在42W大小的数据集上进行训练,在蒸馏到student 上后,测试集上出错的结果中很大一部分是crf 解码失误(BIES 不对 或者类型错误B-a,I-a,E-b),整体的F1值比直接训练bilstm+crf 还要低一点点。
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感谢您的回答
teacher使用的是Robert (12层)+crf,student 是bilstm+crf ,在42W大小的数据集上进行训练,在蒸馏到student 上后,测试集上出错的结果中很大一部分是crf 解码失误(BIES 不对 或者类型错误B-a,I-a,E-b),整体的F1值比直接训练bilstm+crf 还要低一点点。
Transformer和BiLSTM直接计算中间隐层的匹配会有些奇怪。有没有只用最后的kd_loss试试?
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尝试过,只对两个logits 求CE 或者KL ,都与直接训练效果相似,都比teacher的F1值低了1个点。除了bilstm+crf 还有什么很轻量级的模型适合做student的吗?目前的工作是在移动端的,所以对模型推理速度与大小限制很大
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只低1个点似乎不是很多?
或许你可以尝试下多教师蒸馏,将多个bilstm蒸馏到1个bilstm,有时可以获得比直接融合还好的效果。
另外,有一些针对CRF层蒸馏优化工作,比如可以参考这篇
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嗯嗯 感谢回答,既然蒸馏与直接训练得到的结果差不多,会不会可能对于ner任务与bilstm+crf模型来说蒸馏不是一个很好的方向。我去试试那篇文章的方法
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Related Issues (20)
- pre-trained student weights HOT 3
- Where to find gs4210.pkl file or how to generate it ? thanks HOT 2
- interpreting intermediate matches HOT 5
- Show the progress bar when training. HOT 3
- Picking right layers HOT 3
- How about the distillation effect of gpt2 ? HOT 2
- Does it support translation model? HOT 2
- 在VisionTransformer HOT 7
- 关于ner数据的处理 HOT 2
- notebook_examples/msra_ner.ipynb 运行报错 HOT 12
- 不同维度蒸馏有对应的例子吗,从768降到256 HOT 4
- msra_ner.ipynb最后的trainer.evaluate()显示CUDA out of memory,请问训练的显存要求是多大?十分感谢! HOT 2
- 老师,您好,请问有多任务多教师的蒸馏的demo吗? HOT 4
- 老师您好,我想问一下,比如roberta蒸馏到tinybert,中间的hidden是通过线性层拉到同样的维度去算mse,那在推理的时候岂不是这些经过梯度更新的线性层毫无作用?那请问这些线性层仅仅就是为了调整维度? HOT 2
- 蒸馏后的模型进行evaluate,报错AxisError: axis 2 is out of bounds for array of dimension 1 HOT 5
- 可以使用chatgpt蒸馏到bert或者T5吗? HOT 2
- 麻烦问下,目前支持llama模型吗 HOT 2
- 请问支持BERT-of-Theseus的蒸馏方式吗 HOT 3
- 学生模型权重初始化问题 HOT 2
- TextBrewer/src/textbrewer/distiller_utils.py get_outputs_from_batch fails tocheck dicts properly for maskedLM HOT 4
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