【Hackathon 4th No.102】给AutoConverter增加新的模型组网的支持 AlbertModel #5626

megemini · 2023-04-12T06:52:57Z

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【Hackathon 4th No.102】给AutoConverter增加新的模型组网的支持 AlbertModel

Hackathon 4th No.102 这个任务里面有5个模型，我计划每个模型单独提PR，这个PR是处理 albert 模型。

使用的测试模型 hf-internal-testing/tiny-random-AlbertModel

反馈几个问题：

AlbertForQuestionAnswering 模型无法测试，transformers 的这个模型与 paddlenlp 有点区别：

class AlbertForQuestionAnswering(AlbertPreTrainedModel):
    _keys_to_ignore_on_load_unexpected = [r"pooler"]

    def __init__(self, config: AlbertConfig):
        super().__init__(config)
        self.num_labels = config.num_labels

        self.albert = AlbertModel(config, add_pooling_layer=False) # 注意这里
        self.qa_outputs = nn.Linear(config.hidden_size, config.num_labels)

        # Initialize weights and apply final processing
        self.post_init()

transformers 的 albert 没有添加 pooling 层，而 paddle 是有的，导致无法做name mapping。
请问这个要怎么处理？

AlbertForMaskedLM 与 AlbertForPretraining 参考 BertModel 同样无法测试。

@wj-Mcat 请评审，谢谢！：）

…nto albert_auto_converter

paddle-bot · 2023-04-12T06:53:02Z

Thanks for your contribution!

codecov · 2023-04-12T10:55:00Z

Codecov Report

Merging #5626 (af80b45) into develop (413fd2f) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop    #5626      +/-   ##
===========================================
+ Coverage    59.58%   59.59%   +0.01%     
===========================================
  Files          483      483              
  Lines        68102    68121      +19     
===========================================
+ Hits         40581    40600      +19     
  Misses       27521    27521

Impacted Files	Coverage Δ
paddlenlp/transformers/albert/modeling.py	`86.19% <100.00%> (+0.61%)`	⬆️

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megemini · 2023-04-12T11:46:21Z

刚看了一下 PaddleNLP-CI 失败的原因，好象是别的测试用例出错了？

wj-Mcat · 2023-04-13T03:08:02Z

刚看了一下 PaddleNLP-CI 失败的原因，好象是别的测试用例出错了？

是得，这个你暂时不用管。

wj-Mcat · 2023-04-13T03:18:10Z

transformers 的 albert 没有添加 pooling 层，而 paddle 是有的，导致无法做name mapping。请问这个要怎么处理？

transformers 源码中也是通过add_pooling_layer来控制是否添加pooler，所以这里有可能有pooler 层，这里你暂时加上pooler 的映射，只不过会抛 warning 。

AlbertForMaskedLM 与 AlbertForPretraining 也是同样来处理。

wj-Mcat · 2023-04-13T03:19:50Z

paddlenlp/transformers/albert/modeling.py

@@ -357,6 +358,118 @@ class AlbertPretrainedModel(PretrainedModel):
    pretrained_init_configuration = ALBERT_PRETRAINED_INIT_CONFIGURATION
    pretrained_resource_files_map = ALBERT_PRETRAINED_RESOURCE_FILES_MAP

+    @classmethod
+    def _get_name_mappings(cls, config: AlbertConfig) -> List[StateDictNameMapping]:
+        mappings: list[StateDictNameMapping] = []


这个变量定义在这里没有用到，故可以删除。

wj-Mcat · 2023-04-13T03:22:03Z

tests/transformers/albert/test_modeling.py

+            # ("AlbertForMaskedLM",),   TODO: need to tie weights
+            # ("AlbertForPretraining",),   TODO: need to tie weights
+            ("AlbertForMultipleChoice",),
+            # ("AlbertForQuestionAnswering",), TODO: transformers NOT add the last pool layer before qa_outputs


可通过 architectures 来控制 pooler 的映射。

wj-Mcat · 2023-04-13T03:23:37Z

tests/transformers/albert/test_modeling.py

+            # ("AlbertForMaskedLM",),   TODO: need to tie weights
+            # ("AlbertForPretraining",),   TODO: need to tie weights


等 #5623 合入之后就可以用 tie_weights 了。

…nto albert_auto_converter

megemini · 2023-04-13T07:18:03Z

之前 AlbertForQuestionAnswering 不过测的原因找到了，不是 pool 层的问题，是之前 name mapping 写错了，已经修改好，并且单测通过。
关于 add_pooling_layer，这个参数在 transformers 代码里面是写死的：

class AlbertForQuestionAnswering(AlbertPreTrainedModel):
  _keys_to_ignore_on_load_unexpected = [r"pooler"]

  def __init__(self, config: AlbertConfig):
      super().__init__(config)
      self.num_labels = config.num_labels

      self.albert = AlbertModel(config, add_pooling_layer=False) # 注意这里
      self.qa_outputs = nn.Linear(config.hidden_size, config.num_labels)

      # Initialize weights and apply final processing
      self.post_init()

在 transformers 的 config.json 中也没有这个配置项：

{
"_name_or_path": "tiny_models/albert/AlbertForQuestionAnswering",
"architectures": [
  "AlbertForQuestionAnswering"
],
"attention_probs_dropout_prob": 0.1,
"bos_token_id": 2,
"classifier_dropout_prob": 0.1,
"embedding_size": 128,
"eos_token_id": 3,
"hidden_act": "gelu",
"hidden_dropout_prob": 0.1,
"hidden_size": 36,
"initializer_range": 0.02,
"inner_group_num": 1,
"intermediate_size": 37,
"layer_norm_eps": 1e-12,
"max_position_embeddings": 512,
"model_type": "albert",
"num_attention_heads": 6,
"num_hidden_groups": 6,
"num_hidden_layers": 6,
"pad_token_id": 0,
"position_embedding_type": "absolute",
"torch_dtype": "float32",
"transformers_version": "4.28.0.dev0",
"type_vocab_size": 16,
"vocab_size": 30000
}

而在 paddlenlp.transformers 中是个配置项：

class AlbertModel(AlbertPretrainedModel):
  def __init__(self, config: AlbertConfig):
      ...
      if config.add_pooling_layer:  # 注意这里
          self.pooler = nn.Linear(config.hidden_size, config.hidden_size)
          self.pooler_activation = nn.Tanh()
      else:
          self.pooler = None
          self.pooler_activation = None

      self.init_weights()

当用 from_pretrained 引入模型的时候，默认将 add_pooling_layer 设为 True。

这样一般用没啥问题，因为模型的 logits 输出不走 pool 层，问题是，这时候 pool 层其实是随机初始化的，如果有人要用这个输出，那么结果是不可预测的。

我这里把 pool 层做了个判断：

      if config.add_pooling_layer:
          model_mappings.extend(
              [
                  ["pooler.weight", "pooler.weight", "transpose"],
                  ["pooler.bias", "pooler.bias"],
              ]
          )

请帮忙看看这样处理行不行？

谢谢！

sijunhe · 2023-04-13T10:48:11Z

AlbertForMaskedLM 与 AlbertForPretraining 可以暂时不需要，处理好AlbertForQuestionAnswering即可

megemini · 2023-04-14T03:02:18Z

AlbertForMaskedLM 与 AlbertForPretraining 可以暂时不需要，处理好AlbertForQuestionAnswering即可

嗯 AlbertForQuestionAnswering 已经处理好了～

sijunhe · 2023-04-14T03:08:45Z

需要merge develop一下哈

…nto albert_auto_converter

megemini · 2023-04-14T04:27:49Z

需要merge develop一下哈

搞定，请评审，谢谢！

sijunhe · 2023-04-14T05:45:22Z

请帮忙看看这样处理行不行？

谢谢！

没问题的

PR is good now

sijunhe

lgtm

megemini added 2 commits April 12, 2023 14:31

[Add]Add AlbertModel to AutoConverter

6f01e2e

Merge branch 'develop' of https://github.com/PaddlePaddle/PaddleNLP i…

13e935d

…nto albert_auto_converter

paddle-bot bot added contributor status: proposed labels Apr 12, 2023

megemini mentioned this pull request Apr 12, 2023

【PaddlePaddle Hackathon 第四期】任务总览 PaddlePaddle/Paddle#51281

Closed

[Change]Add classifier.bias to suppress warning

e0e60f5

wj-Mcat previously requested changes Apr 13, 2023

View reviewed changes

megemini added 2 commits April 13, 2023 14:52

[Fix]Fix AlbertForQuestionAnswering name mapping

6deaf28

Merge branch 'develop' of https://github.com/PaddlePaddle/PaddleNLP i…

c0b2eb1

…nto albert_auto_converter

sijunhe added the hackathon label Apr 13, 2023

megemini added 3 commits April 14, 2023 11:40

[Fix]Fix conflict

c4bdcd1

Merge branch 'develop' of https://github.com/PaddlePaddle/PaddleNLP i…

5b3d809

…nto albert_auto_converter

[Fix]Fix lint style

af80b45

sijunhe approved these changes Apr 14, 2023

View reviewed changes

sijunhe merged commit 65db5e5 into PaddlePaddle:develop Apr 14, 2023

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【Hackathon 4th No.102】给AutoConverter增加新的模型组网的支持 AlbertModel #5626

【Hackathon 4th No.102】给AutoConverter增加新的模型组网的支持 AlbertModel #5626

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		# ("AlbertForMaskedLM",), TODO: need to tie weights
		# ("AlbertForPretraining",), TODO: need to tie weights

【Hackathon 4th No.102】给AutoConverter增加新的模型组网的支持 AlbertModel #5626

【Hackathon 4th No.102】给AutoConverter增加新的模型组网的支持 AlbertModel #5626

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megemini commented Apr 12, 2023

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