don't push them
This commit is contained in:
Arthur Zucker
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# 🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨
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# This file was automatically generated from <path_to_diff_file.py>.
|
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# Do NOT edit this file manually as any edits will be overwritten by the generation of
|
||||
# the file from the diff. If any change should be done, please apply the change to the
|
||||
# diff.py file directly.
|
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# 🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨
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from ...configuration_utils import PretrainedConfig
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class MyNewModelConfig(PretrainedConfig):
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r"""
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This is the configuration class to store the configuration of a [`MyNewModelModel`]. It is used to instantiate an MyNewModel
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model according to the specified arguments, defining the model architecture. Instantiating a configuration with the
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defaults will yield a similar configuration to that of the MyNewModel-7B.
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Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the
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documentation from [`PretrainedConfig`] for more information.
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Args:
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vocab_size (`int`, *optional*, defaults to 32000):
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Vocabulary size of the MyNewModel model. Defines the number of different tokens that can be represented by the
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`inputs_ids` passed when calling [`MyNewModelModel`]
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hidden_size (`int`, *optional*, defaults to 4096):
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Dimension of the hidden representations.
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intermediate_size (`int`, *optional*, defaults to 11008):
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Dimension of the MLP representations.
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num_hidden_layers (`int`, *optional*, defaults to 32):
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Number of hidden layers in the Transformer decoder.
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num_attention_heads (`int`, *optional*, defaults to 32):
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Number of attention heads for each attention layer in the Transformer decoder.
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num_key_value_heads (`int`, *optional*):
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This is the number of key_value heads that should be used to implement Grouped Query Attention. If
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`num_key_value_heads=num_attention_heads`, the model will use Multi Head Attention (MHA), if
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`num_key_value_heads=1 the model will use Multi Query Attention (MQA) otherwise GQA is used. When
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converting a multi-head checkpoint to a GQA checkpoint, each group key and value head should be constructed
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by meanpooling all the original heads within that group. For more details checkout [this
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paper](https://arxiv.org/pdf/2305.13245.pdf). If it is not specified, will default to
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`num_attention_heads`.
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hidden_act (`str` or `function`, *optional*, defaults to `"silu"`):
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The non-linear activation function (function or string) in the decoder.
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max_position_embeddings (`int`, *optional*, defaults to 2048):
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The maximum sequence length that this model might ever be used with. MyNewModel 1 supports up to 2048 tokens,
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MyNewModel 2 up to 4096, CodeMyNewModel up to 16384.
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initializer_range (`float`, *optional*, defaults to 0.02):
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The standard deviation of the truncated_normal_initializer for initializing all weight matrices.
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rms_norm_eps (`float`, *optional*, defaults to 1e-06):
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The epsilon used by the rms normalization layers.
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use_cache (`bool`, *optional*, defaults to `True`):
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Whether or not the model should return the last key/values attentions (not used by all models). Only
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relevant if `config.is_decoder=True`.
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pad_token_id (`int`, *optional*):
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Padding token id.
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bos_token_id (`int`, *optional*, defaults to 1):
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Beginning of stream token id.
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eos_token_id (`int`, *optional*, defaults to 2):
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End of stream token id.
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pretraining_tp (`int`, *optional*, defaults to 1):
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Experimental feature. Tensor parallelism rank used during pretraining. Please refer to [this
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document](https://huggingface.co/docs/transformers/main/perf_train_gpu_many#tensor-parallelism) to understand more about it. This value is
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necessary to ensure exact reproducibility of the pretraining results. Please refer to [this
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issue](https://github.com/pytorch/pytorch/issues/76232).
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tie_word_embeddings (`bool`, *optional*, defaults to `False`):
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Whether to tie weight embeddings
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rope_theta (`float`, *optional*, defaults to 10000.0):
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The base period of the RoPE embeddings.
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rope_scaling (`Dict`, *optional*):
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Dictionary containing the scaling configuration for the RoPE embeddings. Currently supports two scaling
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strategies: linear and dynamic. Their scaling factor must be a float greater than 1. The expected format is
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`{"type": strategy name, "factor": scaling factor}`. When using this flag, don't update
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`max_position_embeddings` to the expected new maximum. See the following thread for more information on how
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these scaling strategies behave:
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https://www.reddit.com/r/LocalMyNewModel/comments/14mrgpr/dynamically_scaled_rope_further_increases/. This is an
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experimental feature, subject to breaking API changes in future versions.
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attention_bias (`bool`, *optional*, defaults to `False`):
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Whether to use a bias in the query, key, value and output projection layers during self-attention.
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attention_dropout (`float`, *optional*, defaults to 0.0):
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The dropout ratio for the attention probabilities.
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mlp_bias (`bool`, *optional*, defaults to `False`):
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Whether to use a bias in up_proj, down_proj and gate_proj layers in the MLP layers.
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```python
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>>> from transformers import MyNewModelModel, MyNewModelConfig
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>>> # Initializing a MyNewModel my_new_model-7b style configuration
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>>> configuration = MyNewModelConfig()
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>>> # Initializing a model from the my_new_model-7b style configuration
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>>> model = MyNewModelModel(configuration)
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>>> # Accessing the model configuration
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>>> configuration = model.config
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```"""
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model_type = "my_new_model"
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keys_to_ignore_at_inference = ["past_key_values"]
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def __init__(
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self,
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vocab_size=32000,
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hidden_size=4096,
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intermediate_size=11008,
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num_hidden_layers=32,
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num_attention_heads=32,
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num_key_value_heads=None,
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hidden_act="silu",
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max_position_embeddings=2048,
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initializer_range=0.02,
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rms_norm_eps=1e-6,
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use_cache=True,
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pad_token_id=None,
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bos_token_id=1,
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eos_token_id=2,
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pretraining_tp=1,
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tie_word_embeddings=False,
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rope_theta=10000.0,
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rope_scaling=None,
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attention_bias=False,
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attention_dropout=0.0,
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mlp_bias=True,
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new_param=0,
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**kwargs,
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):
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self.mlp_bias = mlp_bias
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self.new_param = new_param
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self.vocab_size = vocab_size
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self.max_position_embeddings = max_position_embeddings
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self.hidden_size = hidden_size
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self.intermediate_size = intermediate_size
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self.num_hidden_layers = num_hidden_layers
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self.num_attention_heads = num_attention_heads
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# for backward compatibility
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if num_key_value_heads is None:
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num_key_value_heads = num_attention_heads
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self.num_key_value_heads = num_key_value_heads
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self.hidden_act = hidden_act
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self.initializer_range = initializer_range
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self.rms_norm_eps = rms_norm_eps
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self.pretraining_tp = pretraining_tp
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self.use_cache = use_cache
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self.rope_theta = rope_theta
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self.rope_scaling = rope_scaling
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self._rope_scaling_validation()
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self.attention_bias = attention_bias
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self.attention_dropout = attention_dropout
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super().__init__(
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pad_token_id=pad_token_id,
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bos_token_id=bos_token_id,
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eos_token_id=eos_token_id,
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tie_word_embeddings=tie_word_embeddings,
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**kwargs,
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)
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def _rope_scaling_validation(self):
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"""
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Validate the `rope_scaling` configuration.
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"""
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if self.rope_scaling is None:
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return
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if not isinstance(self.rope_scaling, dict) or len(self.rope_scaling) != 2:
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raise ValueError(
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"`rope_scaling` must be a dictionary with two fields, `type` and `factor`, " f"got {self.rope_scaling}"
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)
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rope_scaling_type = self.rope_scaling.get("type", None)
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rope_scaling_factor = self.rope_scaling.get("factor", None)
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if rope_scaling_type is None or rope_scaling_type not in ["linear", "dynamic"]:
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raise ValueError(
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f"`rope_scaling`'s type field must be one of ['linear', 'dynamic'], got {rope_scaling_type}"
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)
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if rope_scaling_factor is None or not isinstance(rope_scaling_factor, float) or rope_scaling_factor <= 1.0:
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raise ValueError(f"`rope_scaling`'s factor field must be a float > 1, got {rope_scaling_factor}")
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@ -1,170 +0,0 @@
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# 🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨
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# This file was automatically generated from <path_to_diff_file.py>.
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# Do NOT edit this file manually as any edits will be overwritten by the generation of
|
||||
# the file from the diff. If any change should be done, please apply the change to the
|
||||
# diff.py file directly.
|
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# 🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨
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class MyNewModel2Config(PretrainedConfig):
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r"""
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This is the configuration class to store the configuration of a [`MyNewModel2Model`]. It is used to instantiate an MyNewModel2
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model according to the specified arguments, defining the model architecture. Instantiating a configuration with the
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defaults will yield a similar configuration to that of the MyNewModel2-7B.
|
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Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the
|
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documentation from [`PretrainedConfig`] for more information.
|
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Args:
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vocab_size (`int`, *optional*, defaults to 32000):
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Vocabulary size of the MyNewModel2 model. Defines the number of different tokens that can be represented by the
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`inputs_ids` passed when calling [`MyNewModel2Model`]
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hidden_size (`int`, *optional*, defaults to 4096):
|
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Dimension of the hidden representations.
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intermediate_size (`int`, *optional*, defaults to 11008):
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Dimension of the MLP representations.
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num_hidden_layers (`int`, *optional*, defaults to 32):
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Number of hidden layers in the Transformer decoder.
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num_attention_heads (`int`, *optional*, defaults to 32):
|
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Number of attention heads for each attention layer in the Transformer decoder.
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num_key_value_heads (`int`, *optional*):
|
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This is the number of key_value heads that should be used to implement Grouped Query Attention. If
|
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`num_key_value_heads=num_attention_heads`, the model will use Multi Head Attention (MHA), if
|
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`num_key_value_heads=1 the model will use Multi Query Attention (MQA) otherwise GQA is used. When
|
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converting a multi-head checkpoint to a GQA checkpoint, each group key and value head should be constructed
|
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by meanpooling all the original heads within that group. For more details checkout [this
|
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paper](https://arxiv.org/pdf/2305.13245.pdf). If it is not specified, will default to
|
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`num_attention_heads`.
|
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hidden_act (`str` or `function`, *optional*, defaults to `"silu"`):
|
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The non-linear activation function (function or string) in the decoder.
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max_position_embeddings (`int`, *optional*, defaults to 2048):
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The maximum sequence length that this model might ever be used with. MyNewModel2 1 supports up to 2048 tokens,
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MyNewModel2 2 up to 4096, CodeMyNewModel2 up to 16384.
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initializer_range (`float`, *optional*, defaults to 0.02):
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The standard deviation of the truncated_normal_initializer for initializing all weight matrices.
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rms_norm_eps (`float`, *optional*, defaults to 1e-06):
|
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The epsilon used by the rms normalization layers.
|
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use_cache (`bool`, *optional*, defaults to `True`):
|
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Whether or not the model should return the last key/values attentions (not used by all models). Only
|
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relevant if `config.is_decoder=True`.
|
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pad_token_id (`int`, *optional*):
|
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Padding token id.
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bos_token_id (`int`, *optional*, defaults to 1):
|
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Beginning of stream token id.
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eos_token_id (`int`, *optional*, defaults to 2):
|
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End of stream token id.
|
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pretraining_tp (`int`, *optional*, defaults to 1):
|
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Experimental feature. Tensor parallelism rank used during pretraining. Please refer to [this
|
||||
document](https://huggingface.co/docs/transformers/main/perf_train_gpu_many#tensor-parallelism) to understand more about it. This value is
|
||||
necessary to ensure exact reproducibility of the pretraining results. Please refer to [this
|
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issue](https://github.com/pytorch/pytorch/issues/76232).
|
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tie_word_embeddings (`bool`, *optional*, defaults to `False`):
|
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Whether to tie weight embeddings
|
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rope_theta (`float`, *optional*, defaults to 10000.0):
|
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The base period of the RoPE embeddings.
|
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rope_scaling (`Dict`, *optional*):
|
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Dictionary containing the scaling configuration for the RoPE embeddings. Currently supports two scaling
|
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strategies: linear and dynamic. Their scaling factor must be a float greater than 1. The expected format is
|
||||
`{"type": strategy name, "factor": scaling factor}`. When using this flag, don't update
|
||||
`max_position_embeddings` to the expected new maximum. See the following thread for more information on how
|
||||
these scaling strategies behave:
|
||||
https://www.reddit.com/r/LocalMyNewModel2/comments/14mrgpr/dynamically_scaled_rope_further_increases/. This is an
|
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experimental feature, subject to breaking API changes in future versions.
|
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attention_bias (`bool`, *optional*, defaults to `False`):
|
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Whether to use a bias in the query, key, value and output projection layers during self-attention.
|
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attention_dropout (`float`, *optional*, defaults to 0.0):
|
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The dropout ratio for the attention probabilities.
|
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mlp_bias (`bool`, *optional*, defaults to `False`):
|
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Whether to use a bias in up_proj, down_proj and gate_proj layers in the MLP layers.
|
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```python
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>>> from transformers import MyNewModel2Model, MyNewModel2Config
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>>> # Initializing a MyNewModel2 my_new_model2-7b style configuration
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>>> configuration = MyNewModel2Config()
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>>> # Initializing a model from the my_new_model2-7b style configuration
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>>> model = MyNewModel2Model(configuration)
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>>> # Accessing the model configuration
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>>> configuration = model.config
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```"""
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model_type = "my_new_model2"
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keys_to_ignore_at_inference = ["past_key_values"]
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def __init__(
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self,
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vocab_size=32000,
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hidden_size=4096,
|
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intermediate_size=11008,
|
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num_hidden_layers=32,
|
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num_attention_heads=32,
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num_key_value_heads=None,
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hidden_act="silu",
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max_position_embeddings=2048,
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initializer_range=0.02,
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rms_norm_eps=1e-6,
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use_cache=True,
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pad_token_id=None,
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bos_token_id=1,
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eos_token_id=2,
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pretraining_tp=1,
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tie_word_embeddings=False,
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rope_theta=10000.0,
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rope_scaling=None,
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attention_bias=False,
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attention_dropout=0.0,
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mlp_bias=False,
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**kwargs,
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):
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self.vocab_size = vocab_size
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self.max_position_embeddings = max_position_embeddings
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self.hidden_size = hidden_size
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self.intermediate_size = intermediate_size
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self.num_hidden_layers = num_hidden_layers
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self.num_attention_heads = num_attention_heads
|
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|
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# for backward compatibility
|
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if num_key_value_heads is None:
|
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num_key_value_heads = num_attention_heads
|
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|
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self.num_key_value_heads = num_key_value_heads
|
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self.hidden_act = hidden_act
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self.initializer_range = initializer_range
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self.rms_norm_eps = rms_norm_eps
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self.pretraining_tp = pretraining_tp
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self.use_cache = use_cache
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self.rope_theta = rope_theta
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self.rope_scaling = rope_scaling
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self._rope_scaling_validation()
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self.attention_bias = attention_bias
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self.attention_dropout = attention_dropout
|
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self.mlp_bias = mlp_bias
|
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|
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super().__init__(
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pad_token_id=pad_token_id,
|
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bos_token_id=bos_token_id,
|
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eos_token_id=eos_token_id,
|
||||
tie_word_embeddings=tie_word_embeddings,
|
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**kwargs,
|
||||
)
|
||||
|
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def _rope_scaling_validation(self):
|
||||
"""
|
||||
Validate the `rope_scaling` configuration.
|
||||
"""
|
||||
if self.rope_scaling is None:
|
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return
|
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|
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if not isinstance(self.rope_scaling, dict) or len(self.rope_scaling) != 2:
|
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raise ValueError(
|
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"`rope_scaling` must be a dictionary with two fields, `type` and `factor`, " f"got {self.rope_scaling}"
|
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)
|
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rope_scaling_type = self.rope_scaling.get("type", None)
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rope_scaling_factor = self.rope_scaling.get("factor", None)
|
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if rope_scaling_type is None or rope_scaling_type not in ["linear", "dynamic"]:
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raise ValueError(
|
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f"`rope_scaling`'s type field must be one of ['linear', 'dynamic'], got {rope_scaling_type}"
|
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)
|
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if rope_scaling_factor is None or not isinstance(rope_scaling_factor, float) or rope_scaling_factor <= 1.0:
|
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raise ValueError(f"`rope_scaling`'s factor field must be a float > 1, got {rope_scaling_factor}")
|
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|
|
@ -1,127 +0,0 @@
|
|||
# 🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨
|
||||
# This file was automatically generated from <path_to_diff_file.py>.
|
||||
# Do NOT edit this file manually as any edits will be overwritten by the generation of
|
||||
# the file from the diff. If any change should be done, please apply the change to the
|
||||
# diff.py file directly.
|
||||
# 🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨
|
||||
# Example where we only want to overwrite the defaults of an init
|
||||
|
||||
|
||||
class NewModelConfig(PretrainedConfig):
|
||||
r"""
|
||||
This is the configuration class to store the configuration of a [`NewModelModel`]. It is used to instantiate an NewModel
|
||||
model according to the specified arguments, defining the model architecture. Instantiating a configuration with the
|
||||
defaults will yield a similar configuration to that of the NewModel-7B.
|
||||
e.g. [google/new_model-7b](https://huggingface.co/google/new_model-7b)
|
||||
Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the
|
||||
documentation from [`PretrainedConfig`] for more information.
|
||||
Args:
|
||||
vocab_size (`int`, *optional*, defaults to 256000):
|
||||
Vocabulary size of the NewModel model. Defines the number of different tokens that can be represented by the
|
||||
`inputs_ids` passed when calling [`NewModelModel`]
|
||||
hidden_size (`int`, *optional*, defaults to 3072):
|
||||
Dimension of the hidden representations.
|
||||
intermediate_size (`int`, *optional*, defaults to 24576):
|
||||
Dimension of the MLP representations.
|
||||
num_hidden_layers (`int`, *optional*, defaults to 28):
|
||||
Number of hidden layers in the Transformer decoder.
|
||||
num_attention_heads (`int`, *optional*, defaults to 16):
|
||||
Number of attention heads for each attention layer in the Transformer decoder.
|
||||
num_key_value_heads (`int`, *optional*, defaults to 16):
|
||||
This is the number of key_value heads that should be used to implement Grouped Query Attention. If
|
||||
`num_key_value_heads=num_attention_heads`, the model will use Multi Head Attention (MHA), if
|
||||
`num_key_value_heads=1 the model will use Multi Query Attention (MQA) otherwise GQA is used. When
|
||||
converting a multi-head checkpoint to a GQA checkpoint, each group key and value head should be constructed
|
||||
by meanpooling all the original heads within that group. For more details checkout [this
|
||||
paper](https://arxiv.org/pdf/2305.13245.pdf). If it is not specified, will default to
|
||||
`num_attention_heads`.
|
||||
head_dim (`int`, *optional*, defaults to 256):
|
||||
The attention head dimension.
|
||||
hidden_act (`str` or `function`, *optional*, defaults to `"gelu_pytorch_tanh"`):
|
||||
The legacy activation function. It is overwritten by the `hidden_activation`.
|
||||
hidden_activation (`str` or `function`, *optional*):
|
||||
The non-linear activation function (function or string) in the decoder. Will default to `"gelu_pytorch_tanh"`
|
||||
if not specified. `"gelu_pytorch_tanh"` uses an approximation of the `"gelu"` activation function.
|
||||
max_position_embeddings (`int`, *optional*, defaults to 8192):
|
||||
The maximum sequence length that this model might ever be used with.
|
||||
initializer_range (`float`, *optional*, defaults to 0.02):
|
||||
The standard deviation of the truncated_normal_initializer for initializing all weight matrices.
|
||||
rms_norm_eps (`float`, *optional*, defaults to 1e-06):
|
||||
The epsilon used by the rms normalization layers.
|
||||
use_cache (`bool`, *optional*, defaults to `True`):
|
||||
Whether or not the model should return the last key/values attentions (not used by all models). Only
|
||||
relevant if `config.is_decoder=True`.
|
||||
pad_token_id (`int`, *optional*, defaults to 0):
|
||||
Padding token id.
|
||||
eos_token_id (`int`, *optional*, defaults to 1):
|
||||
End of stream token id.
|
||||
bos_token_id (`int`, *optional*, defaults to 2):
|
||||
Beginning of stream token id.
|
||||
tie_word_embeddings (`bool`, *optional*, defaults to `True`):
|
||||
Whether to tie weight embeddings
|
||||
rope_theta (`float`, *optional*, defaults to 10000.0):
|
||||
The base period of the RoPE embeddings.
|
||||
attention_bias (`bool`, defaults to `False`, *optional*, defaults to `False`):
|
||||
Whether to use a bias in the query, key, value and output projection layers during self-attention.
|
||||
attention_dropout (`float`, *optional*, defaults to 0.0):
|
||||
The dropout ratio for the attention probabilities.
|
||||
```python
|
||||
>>> from transformers import NewModelModel, NewModelConfig
|
||||
>>> # Initializing a NewModel new_model-7b style configuration
|
||||
>>> configuration = NewModelConfig()
|
||||
>>> # Initializing a model from the new_model-7b style configuration
|
||||
>>> model = NewModelModel(configuration)
|
||||
>>> # Accessing the model configuration
|
||||
>>> configuration = model.config
|
||||
```"""
|
||||
|
||||
model_type = "new_model"
|
||||
keys_to_ignore_at_inference = ["past_key_values"]
|
||||
|
||||
def __init__(
|
||||
self,
|
||||
vocab_size=256030,
|
||||
hidden_size=64,
|
||||
intermediate_size=90,
|
||||
num_hidden_layers=28,
|
||||
num_attention_heads=16,
|
||||
num_key_value_heads=16,
|
||||
head_dim=256,
|
||||
hidden_act="gelu_pytorch_tanh",
|
||||
hidden_activation=None,
|
||||
max_position_embeddings=1500,
|
||||
initializer_range=0.02,
|
||||
rms_norm_eps=1e-6,
|
||||
use_cache=True,
|
||||
pad_token_id=0,
|
||||
eos_token_id=1,
|
||||
bos_token_id=2,
|
||||
tie_word_embeddings=True,
|
||||
rope_theta=10000.0,
|
||||
attention_bias=False,
|
||||
attention_dropout=0.0,
|
||||
):
|
||||
self.vocab_size = vocab_size
|
||||
self.max_position_embeddings = max_position_embeddings
|
||||
self.hidden_size = hidden_size
|
||||
self.intermediate_size = intermediate_size
|
||||
self.num_hidden_layers = num_hidden_layers
|
||||
self.num_attention_heads = num_attention_heads
|
||||
self.head_dim = head_dim
|
||||
self.num_key_value_heads = num_key_value_heads
|
||||
self.hidden_act = hidden_act
|
||||
self.hidden_activation = hidden_activation
|
||||
self.initializer_range = initializer_range
|
||||
self.rms_norm_eps = rms_norm_eps
|
||||
self.use_cache = use_cache
|
||||
self.rope_theta = rope_theta
|
||||
self.attention_bias = attention_bias
|
||||
self.attention_dropout = attention_dropout
|
||||
|
||||
super().__init__(
|
||||
pad_token_id=pad_token_id,
|
||||
bos_token_id=bos_token_id,
|
||||
eos_token_id=eos_token_id,
|
||||
tie_word_embeddings=tie_word_embeddings,
|
||||
**kwargs,
|
||||
)
|
||||
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
|
|
@ -1,8 +0,0 @@
|
|||
# 🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨
|
||||
# This file was automatically generated from <path_to_diff_file.py>.
|
||||
# Do NOT edit this file manually as any edits will be overwritten by the generation of
|
||||
# the file from the diff. If any change should be done, please apply the change to the
|
||||
# diff.py file directly.
|
||||
# 🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨
|
||||
# Example where we only want to overwrite the defaults of an init
|
||||
|
||||
|
|
@ -1,974 +0,0 @@
|
|||
# 🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨
|
||||
# This file was automatically generated from <path_to_diff_file.py>.
|
||||
# Do NOT edit this file manually as any edits will be overwritten by the generation of
|
||||
# the file from the diff. If any change should be done, please apply the change to the
|
||||
# diff.py file directly.
|
||||
# 🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨
|
||||
import math
|
||||
from typing import List, Optional, Tuple, Union
|
||||
|
||||
import torch
|
||||
import torch.nn.functional as F
|
||||
import torch.utils.checkpoint
|
||||
from torch import nn
|
||||
|
||||
from transformers import Cache
|
||||
|
||||
from ...activations import ACT2FN
|
||||
from ...cache_utils import Cache, StaticCache
|
||||
from ...modeling_attn_mask_utils import AttentionMaskConverter
|
||||
from ...modeling_outputs import (
|
||||
BaseModelOutputWithPast,
|
||||
)
|
||||
from ...modeling_utils import PreTrainedModel
|
||||
from ...utils import (
|
||||
add_start_docstrings,
|
||||
add_start_docstrings_to_model_forward,
|
||||
is_flash_attn_2_available,
|
||||
is_flash_attn_greater_or_equal_2_10,
|
||||
logging,
|
||||
)
|
||||
from .configuration_super import SuperConfig
|
||||
|
||||
|
||||
if is_flash_attn_2_available():
|
||||
from flash_attn import flash_attn_func, flash_attn_varlen_func
|
||||
from flash_attn.bert_padding import index_first_axis, pad_input, unpad_input # noqa
|
||||
|
||||
|
||||
logger = logging.get_logger(__name__)
|
||||
|
||||
|
||||
def _get_unpad_data(attention_mask):
|
||||
seqlens_in_batch = attention_mask.sum(dim=-1, dtype=torch.int32)
|
||||
indices = torch.nonzero(attention_mask.flatten(), as_tuple=False).flatten()
|
||||
max_seqlen_in_batch = seqlens_in_batch.max().item()
|
||||
cu_seqlens = F.pad(torch.cumsum(seqlens_in_batch, dim=0, dtype=torch.int32), (1, 0))
|
||||
return (
|
||||
indices,
|
||||
cu_seqlens,
|
||||
max_seqlen_in_batch,
|
||||
)
|
||||
|
||||
|
||||
class SuperRMSNorm(nn.Module):
|
||||
def __init__(self, hidden_size, eps=1e-6):
|
||||
"""
|
||||
SuperRMSNorm is equivalent to T5LayerNorm
|
||||
"""
|
||||
super().__init__()
|
||||
self.weight = nn.Parameter(torch.ones(hidden_size))
|
||||
self.variance_epsilon = eps
|
||||
|
||||
def forward(self, hidden_states):
|
||||
input_dtype = hidden_states.dtype
|
||||
hidden_states = hidden_states.to(torch.float32)
|
||||
variance = hidden_states.pow(2).mean(-1, keepdim=True)
|
||||
hidden_states = hidden_states * torch.rsqrt(variance + self.variance_epsilon)
|
||||
return self.weight * hidden_states.to(input_dtype)
|
||||
|
||||
|
||||
class SuperRotaryEmbedding(nn.Module):
|
||||
def __init__(self, dim, max_position_embeddings=2048, base=10000, device=None, scaling_factor=1.0):
|
||||
super().__init__()
|
||||
self.scaling_factor = scaling_factor
|
||||
self.dim = dim
|
||||
self.max_position_embeddings = max_position_embeddings
|
||||
self.base = base
|
||||
inv_freq = 1.0 / (self.base ** (torch.arange(0, self.dim, 2, dtype=torch.int64).float().to(device) / self.dim))
|
||||
self.register_buffer("inv_freq", inv_freq, persistent=False)
|
||||
# For BC we register cos and sin cached
|
||||
self.max_seq_len_cached = max_position_embeddings
|
||||
|
||||
@torch.no_grad()
|
||||
def forward(self, x, position_ids):
|
||||
# x: [bs, num_attention_heads, seq_len, head_size]
|
||||
inv_freq_expanded = self.inv_freq[None, :, None].float().expand(position_ids.shape[0], -1, 1)
|
||||
position_ids_expanded = position_ids[:, None, :].float()
|
||||
# Force float32 since bfloat16 loses precision on long contexts
|
||||
# See https://github.com/huggingface/transformers/pull/29285
|
||||
device_type = x.device.type
|
||||
device_type = device_type if isinstance(device_type, str) and device_type != "mps" else "cpu"
|
||||
with torch.autocast(device_type=device_type, enabled=False):
|
||||
freqs = (inv_freq_expanded.float() @ position_ids_expanded.float()).transpose(1, 2)
|
||||
emb = torch.cat((freqs, freqs), dim=-1)
|
||||
cos = emb.cos()
|
||||
sin = emb.sin()
|
||||
return cos.to(dtype=x.dtype), sin.to(dtype=x.dtype)
|
||||
|
||||
|
||||
class SuperLinearScalingRotaryEmbedding(SuperRotaryEmbedding):
|
||||
"""SuperRotaryEmbedding extended with linear scaling. Credits to the Reddit user /u/kaiokendev"""
|
||||
|
||||
def forward(self, x, position_ids):
|
||||
# difference to the original RoPE: a scaling factor is aplied to the position ids
|
||||
position_ids = position_ids.float() / self.scaling_factor
|
||||
cos, sin = super().forward(x, position_ids)
|
||||
return cos, sin
|
||||
|
||||
|
||||
class SuperDynamicNTKScalingRotaryEmbedding(SuperRotaryEmbedding):
|
||||
"""SuperRotaryEmbedding extended with Dynamic NTK scaling. Credits to the Reddit users /u/bloc97 and /u/emozilla"""
|
||||
|
||||
def forward(self, x, position_ids):
|
||||
# difference to the original RoPE: inv_freq is recomputed when the sequence length > original length
|
||||
seq_len = torch.max(position_ids) + 1
|
||||
if seq_len > self.max_position_embeddings:
|
||||
base = self.base * (
|
||||
(self.scaling_factor * seq_len / self.max_position_embeddings) - (self.scaling_factor - 1)
|
||||
) ** (self.dim / (self.dim - 2))
|
||||
inv_freq = 1.0 / (
|
||||
base ** (torch.arange(0, self.dim, 2, dtype=torch.int64).float().to(x.device) / self.dim)
|
||||
)
|
||||
self.register_buffer("inv_freq", inv_freq, persistent=False) # TODO joao: this may break with compilation
|
||||
|
||||
cos, sin = super().forward(x, position_ids)
|
||||
return cos, sin
|
||||
|
||||
|
||||
def rotate_half(x):
|
||||
"""Rotates half the hidden dims of the input."""
|
||||
x1 = x[..., : x.shape[-1] // 2]
|
||||
x2 = x[..., x.shape[-1] // 2 :]
|
||||
return torch.cat((-x2, x1), dim=-1)
|
||||
|
||||
|
||||
def apply_rotary_pos_emb(q, k, cos, sin, position_ids=None, unsqueeze_dim=1):
|
||||
"""Applies Rotary Position Embedding to the query and key tensors.
|
||||
|
||||
Args:
|
||||
q (`torch.Tensor`): The query tensor.
|
||||
k (`torch.Tensor`): The key tensor.
|
||||
cos (`torch.Tensor`): The cosine part of the rotary embedding.
|
||||
sin (`torch.Tensor`): The sine part of the rotary embedding.
|
||||
position_ids (`torch.Tensor`, *optional*):
|
||||
Deprecated and unused.
|
||||
unsqueeze_dim (`int`, *optional*, defaults to 1):
|
||||
The 'unsqueeze_dim' argument specifies the dimension along which to unsqueeze cos[position_ids] and
|
||||
sin[position_ids] so that they can be properly broadcasted to the dimensions of q and k. For example, note
|
||||
that cos[position_ids] and sin[position_ids] have the shape [batch_size, seq_len, head_dim]. Then, if q and
|
||||
k have the shape [batch_size, heads, seq_len, head_dim], then setting unsqueeze_dim=1 makes
|
||||
cos[position_ids] and sin[position_ids] broadcastable to the shapes of q and k. Similarly, if q and k have
|
||||
the shape [batch_size, seq_len, heads, head_dim], then set unsqueeze_dim=2.
|
||||
Returns:
|
||||
`tuple(torch.Tensor)` comprising of the query and key tensors rotated using the Rotary Position Embedding.
|
||||
"""
|
||||
cos = cos.unsqueeze(unsqueeze_dim)
|
||||
sin = sin.unsqueeze(unsqueeze_dim)
|
||||
q_embed = (q * cos) + (rotate_half(q) * sin)
|
||||
k_embed = (k * cos) + (rotate_half(k) * sin)
|
||||
return q_embed, k_embed
|
||||
|
||||
|
||||
class SuperMLP(nn.Module):
|
||||
def __init__(self, config):
|
||||
super().__init__()
|
||||
self.config = config
|
||||
self.hidden_size = config.hidden_size
|
||||
self.intermediate_size = config.intermediate_size
|
||||
self.gate_proj = nn.Linear(self.hidden_size, self.intermediate_size, bias=config.mlp_bias)
|
||||
self.up_proj = nn.Linear(self.hidden_size, self.intermediate_size, bias=config.mlp_bias)
|
||||
self.down_proj = nn.Linear(self.intermediate_size, self.hidden_size, bias=config.mlp_bias)
|
||||
self.act_fn = ACT2FN[config.hidden_act]
|
||||
|
||||
def forward(self, x):
|
||||
if self.config.pretraining_tp > 1:
|
||||
slice = self.intermediate_size // self.config.pretraining_tp
|
||||
gate_proj_slices = self.gate_proj.weight.split(slice, dim=0)
|
||||
up_proj_slices = self.up_proj.weight.split(slice, dim=0)
|
||||
down_proj_slices = self.down_proj.weight.split(slice, dim=1)
|
||||
|
||||
gate_proj = torch.cat(
|
||||
[F.linear(x, gate_proj_slices[i]) for i in range(self.config.pretraining_tp)], dim=-1
|
||||
)
|
||||
up_proj = torch.cat([F.linear(x, up_proj_slices[i]) for i in range(self.config.pretraining_tp)], dim=-1)
|
||||
|
||||
intermediate_states = (self.act_fn(gate_proj) * up_proj).split(slice, dim=2)
|
||||
down_proj = [
|
||||
F.linear(intermediate_states[i], down_proj_slices[i]) for i in range(self.config.pretraining_tp)
|
||||
]
|
||||
down_proj = sum(down_proj)
|
||||
else:
|
||||
down_proj = self.down_proj(self.act_fn(self.gate_proj(x)) * self.up_proj(x))
|
||||
|
||||
return down_proj
|
||||
|
||||
|
||||
def repeat_kv(hidden_states: torch.Tensor, n_rep: int) -> torch.Tensor:
|
||||
"""
|
||||
This is the equivalent of torch.repeat_interleave(x, dim=1, repeats=n_rep). The hidden states go from (batch,
|
||||
num_key_value_heads, seqlen, head_dim) to (batch, num_attention_heads, seqlen, head_dim)
|
||||
"""
|
||||
batch, num_key_value_heads, slen, head_dim = hidden_states.shape
|
||||
if n_rep == 1:
|
||||
return hidden_states
|
||||
hidden_states = hidden_states[:, :, None, :, :].expand(batch, num_key_value_heads, n_rep, slen, head_dim)
|
||||
return hidden_states.reshape(batch, num_key_value_heads * n_rep, slen, head_dim)
|
||||
|
||||
|
||||
class SuperAttention(nn.Module):
|
||||
"""Multi-headed attention from 'Attention Is All You Need' paper"""
|
||||
|
||||
def __init__(self, config: SuperConfig, layer_idx: Optional[int] = None):
|
||||
super().__init__()
|
||||
self.config = config
|
||||
self.layer_idx = layer_idx
|
||||
if layer_idx is None:
|
||||
logger.warning_once(
|
||||
f"Instantiating {self.__class__.__name__} without passing a `layer_idx` is not recommended and will "
|
||||
"lead to errors during the forward call if caching is used. Please make sure to provide a `layer_idx` "
|
||||
"when creating this class."
|
||||
)
|
||||
|
||||
self.attention_dropout = config.attention_dropout
|
||||
self.hidden_size = config.hidden_size
|
||||
self.num_heads = config.num_attention_heads
|
||||
self.head_dim = self.hidden_size // self.num_heads
|
||||
self.num_key_value_heads = config.num_key_value_heads
|
||||
self.num_key_value_groups = self.num_heads // self.num_key_value_heads
|
||||
self.max_position_embeddings = config.max_position_embeddings
|
||||
self.rope_theta = config.rope_theta
|
||||
self.is_causal = True
|
||||
|
||||
if (self.head_dim * self.num_heads) != self.hidden_size:
|
||||
raise ValueError(
|
||||
f"hidden_size must be divisible by num_heads (got `hidden_size`: {self.hidden_size}"
|
||||
f" and `num_heads`: {self.num_heads})."
|
||||
)
|
||||
|
||||
self.q_proj = nn.Linear(self.hidden_size, self.num_heads * self.head_dim, bias=config.attention_bias)
|
||||
self.k_proj = nn.Linear(self.hidden_size, self.num_key_value_heads * self.head_dim, bias=config.attention_bias)
|
||||
self.v_proj = nn.Linear(self.hidden_size, self.num_key_value_heads * self.head_dim, bias=config.attention_bias)
|
||||
self.o_proj = nn.Linear(self.hidden_size, self.hidden_size, bias=config.attention_bias)
|
||||
self._init_rope()
|
||||
|
||||
def _init_rope(self):
|
||||
if self.config.rope_scaling is None:
|
||||
self.rotary_emb = SuperRotaryEmbedding(
|
||||
self.head_dim,
|
||||
max_position_embeddings=self.max_position_embeddings,
|
||||
base=self.rope_theta,
|
||||
)
|
||||
else:
|
||||
scaling_type = self.config.rope_scaling["type"]
|
||||
scaling_factor = self.config.rope_scaling["factor"]
|
||||
if scaling_type == "linear":
|
||||
self.rotary_emb = SuperLinearScalingRotaryEmbedding(
|
||||
self.head_dim,
|
||||
max_position_embeddings=self.max_position_embeddings,
|
||||
scaling_factor=scaling_factor,
|
||||
base=self.rope_theta,
|
||||
)
|
||||
elif scaling_type == "dynamic":
|
||||
self.rotary_emb = SuperDynamicNTKScalingRotaryEmbedding(
|
||||
self.head_dim,
|
||||
max_position_embeddings=self.max_position_embeddings,
|
||||
scaling_factor=scaling_factor,
|
||||
base=self.rope_theta,
|
||||
)
|
||||
else:
|
||||
raise ValueError(f"Unknown RoPE scaling type {scaling_type}")
|
||||
|
||||
def forward(
|
||||
self,
|
||||
hidden_states: torch.Tensor,
|
||||
attention_mask: Optional[torch.Tensor] = None,
|
||||
position_ids: Optional[torch.LongTensor] = None,
|
||||
past_key_value: Optional[Cache] = None,
|
||||
output_attentions: bool = False,
|
||||
use_cache: bool = False,
|
||||
cache_position: Optional[torch.LongTensor] = None,
|
||||
) -> Tuple[torch.Tensor, Optional[torch.Tensor], Optional[Tuple[torch.Tensor]]]:
|
||||
bsz, q_len, _ = hidden_states.size()
|
||||
|
||||
if self.config.pretraining_tp > 1:
|
||||
key_value_slicing = (self.num_key_value_heads * self.head_dim) // self.config.pretraining_tp
|
||||
query_slices = self.q_proj.weight.split(
|
||||
(self.num_heads * self.head_dim) // self.config.pretraining_tp, dim=0
|
||||
)
|
||||
key_slices = self.k_proj.weight.split(key_value_slicing, dim=0)
|
||||
value_slices = self.v_proj.weight.split(key_value_slicing, dim=0)
|
||||
|
||||
query_states = [F.linear(hidden_states, query_slices[i]) for i in range(self.config.pretraining_tp)]
|
||||
query_states = torch.cat(query_states, dim=-1)
|
||||
|
||||
key_states = [F.linear(hidden_states, key_slices[i]) for i in range(self.config.pretraining_tp)]
|
||||
key_states = torch.cat(key_states, dim=-1)
|
||||
|
||||
value_states = [F.linear(hidden_states, value_slices[i]) for i in range(self.config.pretraining_tp)]
|
||||
value_states = torch.cat(value_states, dim=-1)
|
||||
|
||||
else:
|
||||
query_states = self.q_proj(hidden_states)
|
||||
key_states = self.k_proj(hidden_states)
|
||||
value_states = self.v_proj(hidden_states)
|
||||
|
||||
query_states = query_states.view(bsz, q_len, self.num_heads, self.head_dim).transpose(1, 2)
|
||||
key_states = key_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
|
||||
value_states = value_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
|
||||
|
||||
cos, sin = self.rotary_emb(value_states, position_ids)
|
||||
query_states, key_states = apply_rotary_pos_emb(query_states, key_states, cos, sin)
|
||||
|
||||
if past_key_value is not None:
|
||||
# sin and cos are specific to RoPE models; cache_position needed for the static cache
|
||||
cache_kwargs = {"sin": sin, "cos": cos, "cache_position": cache_position}
|
||||
key_states, value_states = past_key_value.update(key_states, value_states, self.layer_idx, cache_kwargs)
|
||||
|
||||
key_states = repeat_kv(key_states, self.num_key_value_groups)
|
||||
value_states = repeat_kv(value_states, self.num_key_value_groups)
|
||||
|
||||
attn_weights = torch.matmul(query_states, key_states.transpose(2, 3)) / math.sqrt(self.head_dim)
|
||||
|
||||
if attention_mask is not None: # no matter the length, we just slice it
|
||||
causal_mask = attention_mask[:, :, :, : key_states.shape[-2]]
|
||||
attn_weights = attn_weights + causal_mask
|
||||
|
||||
# upcast attention to fp32
|
||||
attn_weights = nn.functional.softmax(attn_weights, dim=-1, dtype=torch.float32).to(query_states.dtype)
|
||||
attn_weights = nn.functional.dropout(attn_weights, p=self.attention_dropout, training=self.training)
|
||||
attn_output = torch.matmul(attn_weights, value_states)
|
||||
|
||||
if attn_output.size() != (bsz, self.num_heads, q_len, self.head_dim):
|
||||
raise ValueError(
|
||||
f"`attn_output` should be of size {(bsz, self.num_heads, q_len, self.head_dim)}, but is"
|
||||
f" {attn_output.size()}"
|
||||
)
|
||||
|
||||
attn_output = attn_output.transpose(1, 2).contiguous()
|
||||
|
||||
attn_output = attn_output.reshape(bsz, q_len, self.hidden_size)
|
||||
|
||||
if self.config.pretraining_tp > 1:
|
||||
attn_output = attn_output.split(self.hidden_size // self.config.pretraining_tp, dim=2)
|
||||
o_proj_slices = self.o_proj.weight.split(self.hidden_size // self.config.pretraining_tp, dim=1)
|
||||
attn_output = sum([F.linear(attn_output[i], o_proj_slices[i]) for i in range(self.config.pretraining_tp)])
|
||||
else:
|
||||
attn_output = self.o_proj(attn_output)
|
||||
|
||||
if not output_attentions:
|
||||
attn_weights = None
|
||||
|
||||
return attn_output, attn_weights, past_key_value
|
||||
|
||||
|
||||
class SuperFlashAttention2(SuperAttention):
|
||||
"""
|
||||
Super flash attention module. This module inherits from `SuperAttention` as the weights of the module stays
|
||||
untouched. The only required change would be on the forward pass where it needs to correctly call the public API of
|
||||
flash attention and deal with padding tokens in case the input contains any of them.
|
||||
"""
|
||||
|
||||
def __init__(self, *args, **kwargs):
|
||||
super().__init__(*args, **kwargs)
|
||||
|
||||
# TODO: Should be removed once Flash Attention for RoCm is bumped to 2.1.
|
||||
# flash_attn<2.1 generates top-left aligned causal mask, while what is needed here is bottom-right alignement, that was made default for flash_attn>=2.1. This attribute is used to handle this difference. Reference: https://github.com/Dao-AILab/flash-attention/releases/tag/v2.1.0.
|
||||
# Beware that with flash_attn<2.1, using q_seqlen != k_seqlen (except for the case q_seqlen == 1) produces a wrong mask (top-left).
|
||||
self._flash_attn_uses_top_left_mask = not is_flash_attn_greater_or_equal_2_10()
|
||||
|
||||
def forward(
|
||||
self,
|
||||
hidden_states: torch.Tensor,
|
||||
attention_mask: Optional[torch.LongTensor] = None,
|
||||
position_ids: Optional[torch.LongTensor] = None,
|
||||
past_key_value: Optional[Cache] = None,
|
||||
output_attentions: bool = False,
|
||||
use_cache: bool = False,
|
||||
cache_position: Optional[torch.LongTensor] = None,
|
||||
) -> Tuple[torch.Tensor, Optional[torch.Tensor], Optional[Tuple[torch.Tensor]]]:
|
||||
if isinstance(past_key_value, StaticCache):
|
||||
raise ValueError(
|
||||
"`static` cache implementation is not compatible with `attn_implementation==flash_attention_2` "
|
||||
"make sure to use `sdpa` in the mean time, and open an issue at https://github.com/huggingface/transformers"
|
||||
)
|
||||
|
||||
output_attentions = False
|
||||
|
||||
bsz, q_len, _ = hidden_states.size()
|
||||
|
||||
query_states = self.q_proj(hidden_states)
|
||||
key_states = self.k_proj(hidden_states)
|
||||
value_states = self.v_proj(hidden_states)
|
||||
|
||||
# Flash attention requires the input to have the shape
|
||||
# batch_size x seq_length x head_dim x hidden_dim
|
||||
# therefore we just need to keep the original shape
|
||||
query_states = query_states.view(bsz, q_len, self.num_heads, self.head_dim).transpose(1, 2)
|
||||
key_states = key_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
|
||||
value_states = value_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
|
||||
|
||||
cos, sin = self.rotary_emb(value_states, position_ids)
|
||||
query_states, key_states = apply_rotary_pos_emb(query_states, key_states, cos, sin)
|
||||
|
||||
if past_key_value is not None:
|
||||
# sin and cos are specific to RoPE models; cache_position needed for the static cache
|
||||
cache_kwargs = {"sin": sin, "cos": cos, "cache_position": cache_position}
|
||||
key_states, value_states = past_key_value.update(key_states, value_states, self.layer_idx, cache_kwargs)
|
||||
|
||||
# TODO: These transpose are quite inefficient but Flash Attention requires the layout [batch_size, sequence_length, num_heads, head_dim]. We would need to refactor the KV cache
|
||||
# to be able to avoid many of these transpose/reshape/view.
|
||||
query_states = query_states.transpose(1, 2)
|
||||
key_states = key_states.transpose(1, 2)
|
||||
value_states = value_states.transpose(1, 2)
|
||||
|
||||
dropout_rate = self.attention_dropout if self.training else 0.0
|
||||
|
||||
# In PEFT, usually we cast the layer norms in float32 for training stability reasons
|
||||
# therefore the input hidden states gets silently casted in float32. Hence, we need
|
||||
# cast them back in the correct dtype just to be sure everything works as expected.
|
||||
# This might slowdown training & inference so it is recommended to not cast the LayerNorms
|
||||
# in fp32. (SuperRMSNorm handles it correctly)
|
||||
|
||||
input_dtype = query_states.dtype
|
||||
if input_dtype == torch.float32:
|
||||
if torch.is_autocast_enabled():
|
||||
target_dtype = torch.get_autocast_gpu_dtype()
|
||||
# Handle the case where the model is quantized
|
||||
elif hasattr(self.config, "_pre_quantization_dtype"):
|
||||
target_dtype = self.config._pre_quantization_dtype
|
||||
else:
|
||||
target_dtype = self.q_proj.weight.dtype
|
||||
|
||||
logger.warning_once(
|
||||
f"The input hidden states seems to be silently casted in float32, this might be related to"
|
||||
f" the fact you have upcasted embedding or layer norm layers in float32. We will cast back the input in"
|
||||
f" {target_dtype}."
|
||||
)
|
||||
|
||||
query_states = query_states.to(target_dtype)
|
||||
key_states = key_states.to(target_dtype)
|
||||
value_states = value_states.to(target_dtype)
|
||||
|
||||
attn_output = self._flash_attention_forward(
|
||||
query_states, key_states, value_states, attention_mask, q_len, dropout=dropout_rate
|
||||
)
|
||||
|
||||
attn_output = attn_output.reshape(bsz, q_len, self.hidden_size).contiguous()
|
||||
attn_output = self.o_proj(attn_output)
|
||||
|
||||
if not output_attentions:
|
||||
attn_weights = None
|
||||
|
||||
return attn_output, attn_weights, past_key_value
|
||||
|
||||
def _flash_attention_forward(
|
||||
self, query_states, key_states, value_states, attention_mask, query_length, dropout=0.0, softmax_scale=None
|
||||
):
|
||||
"""
|
||||
Calls the forward method of Flash Attention - if the input hidden states contain at least one padding token
|
||||
first unpad the input, then computes the attention scores and pad the final attention scores.
|
||||
|
||||
Args:
|
||||
query_states (`torch.Tensor`):
|
||||
Input query states to be passed to Flash Attention API
|
||||
key_states (`torch.Tensor`):
|
||||
Input key states to be passed to Flash Attention API
|
||||
value_states (`torch.Tensor`):
|
||||
Input value states to be passed to Flash Attention API
|
||||
attention_mask (`torch.Tensor`):
|
||||
The padding mask - corresponds to a tensor of size `(batch_size, seq_len)` where 0 stands for the
|
||||
position of padding tokens and 1 for the position of non-padding tokens.
|
||||
dropout (`float`):
|
||||
Attention dropout
|
||||
softmax_scale (`float`, *optional*):
|
||||
The scaling of QK^T before applying softmax. Default to 1 / sqrt(head_dim)
|
||||
"""
|
||||
if not self._flash_attn_uses_top_left_mask:
|
||||
causal = self.is_causal
|
||||
else:
|
||||
# TODO: Remove the `query_length != 1` check once Flash Attention for RoCm is bumped to 2.1. For details, please see the comment in SuperFlashAttention2 __init__.
|
||||
causal = self.is_causal and query_length != 1
|
||||
|
||||
# Contains at least one padding token in the sequence
|
||||
if attention_mask is not None:
|
||||
batch_size = query_states.shape[0]
|
||||
query_states, key_states, value_states, indices_q, cu_seq_lens, max_seq_lens = self._upad_input(
|
||||
query_states, key_states, value_states, attention_mask, query_length
|
||||
)
|
||||
|
||||
cu_seqlens_q, cu_seqlens_k = cu_seq_lens
|
||||
max_seqlen_in_batch_q, max_seqlen_in_batch_k = max_seq_lens
|
||||
|
||||
attn_output_unpad = flash_attn_varlen_func(
|
||||
query_states,
|
||||
key_states,
|
||||
value_states,
|
||||
cu_seqlens_q=cu_seqlens_q,
|
||||
cu_seqlens_k=cu_seqlens_k,
|
||||
max_seqlen_q=max_seqlen_in_batch_q,
|
||||
max_seqlen_k=max_seqlen_in_batch_k,
|
||||
dropout_p=dropout,
|
||||
softmax_scale=softmax_scale,
|
||||
causal=causal,
|
||||
)
|
||||
|
||||
attn_output = pad_input(attn_output_unpad, indices_q, batch_size, query_length)
|
||||
else:
|
||||
attn_output = flash_attn_func(
|
||||
query_states, key_states, value_states, dropout, softmax_scale=softmax_scale, causal=causal
|
||||
)
|
||||
|
||||
return attn_output
|
||||
|
||||
def _upad_input(self, query_layer, key_layer, value_layer, attention_mask, query_length):
|
||||
indices_k, cu_seqlens_k, max_seqlen_in_batch_k = _get_unpad_data(attention_mask)
|
||||
batch_size, kv_seq_len, num_key_value_heads, head_dim = key_layer.shape
|
||||
|
||||
key_layer = index_first_axis(
|
||||
key_layer.reshape(batch_size * kv_seq_len, num_key_value_heads, head_dim), indices_k
|
||||
)
|
||||
value_layer = index_first_axis(
|
||||
value_layer.reshape(batch_size * kv_seq_len, num_key_value_heads, head_dim), indices_k
|
||||
)
|
||||
if query_length == kv_seq_len:
|
||||
query_layer = index_first_axis(
|
||||
query_layer.reshape(batch_size * kv_seq_len, self.num_heads, head_dim), indices_k
|
||||
)
|
||||
cu_seqlens_q = cu_seqlens_k
|
||||
max_seqlen_in_batch_q = max_seqlen_in_batch_k
|
||||
indices_q = indices_k
|
||||
elif query_length == 1:
|
||||
max_seqlen_in_batch_q = 1
|
||||
cu_seqlens_q = torch.arange(
|
||||
batch_size + 1, dtype=torch.int32, device=query_layer.device
|
||||
) # There is a memcpy here, that is very bad.
|
||||
indices_q = cu_seqlens_q[:-1]
|
||||
query_layer = query_layer.squeeze(1)
|
||||
else:
|
||||
# The -q_len: slice assumes left padding.
|
||||
attention_mask = attention_mask[:, -query_length:]
|
||||
query_layer, indices_q, cu_seqlens_q, max_seqlen_in_batch_q = unpad_input(query_layer, attention_mask)
|
||||
|
||||
return (
|
||||
query_layer,
|
||||
key_layer,
|
||||
value_layer,
|
||||
indices_q,
|
||||
(cu_seqlens_q, cu_seqlens_k),
|
||||
(max_seqlen_in_batch_q, max_seqlen_in_batch_k),
|
||||
)
|
||||
|
||||
|
||||
class SuperSdpaAttention(SuperAttention):
|
||||
"""
|
||||
Super attention module using torch.nn.functional.scaled_dot_product_attention. This module inherits from
|
||||
`SuperAttention` as the weights of the module stays untouched. The only changes are on the forward pass to adapt to
|
||||
SDPA API.
|
||||
"""
|
||||
|
||||
# Adapted from SuperAttention.forward
|
||||
def forward(
|
||||
self,
|
||||
hidden_states: torch.Tensor,
|
||||
attention_mask: Optional[torch.Tensor] = None,
|
||||
position_ids: Optional[torch.LongTensor] = None,
|
||||
past_key_value: Optional[Cache] = None,
|
||||
output_attentions: bool = False,
|
||||
use_cache: bool = False,
|
||||
cache_position: Optional[torch.LongTensor] = None,
|
||||
) -> Tuple[torch.Tensor, Optional[torch.Tensor], Optional[Tuple[torch.Tensor]]]:
|
||||
if output_attentions:
|
||||
# TODO: Improve this warning with e.g. `model.config.attn_implementation = "manual"` once this is implemented.
|
||||
logger.warning_once(
|
||||
"SuperModel is using SuperSdpaAttention, but `torch.nn.functional.scaled_dot_product_attention` does not support `output_attentions=True`. Falling back to the manual attention implementation, "
|
||||
'but specifying the manual implementation will be required from Transformers version v5.0.0 onwards. This warning can be removed using the argument `attn_implementation="eager"` when loading the model.'
|
||||
)
|
||||
return super().forward(
|
||||
hidden_states=hidden_states,
|
||||
attention_mask=attention_mask,
|
||||
position_ids=position_ids,
|
||||
past_key_value=past_key_value,
|
||||
output_attentions=output_attentions,
|
||||
use_cache=use_cache,
|
||||
cache_position=cache_position,
|
||||
)
|
||||
|
||||
bsz, q_len, _ = hidden_states.size()
|
||||
|
||||
query_states = self.q_proj(hidden_states)
|
||||
key_states = self.k_proj(hidden_states)
|
||||
value_states = self.v_proj(hidden_states)
|
||||
|
||||
query_states = query_states.view(bsz, q_len, self.num_heads, self.head_dim).transpose(1, 2)
|
||||
key_states = key_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
|
||||
value_states = value_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
|
||||
|
||||
cos, sin = self.rotary_emb(value_states, position_ids)
|
||||
query_states, key_states = apply_rotary_pos_emb(query_states, key_states, cos, sin)
|
||||
|
||||
if past_key_value is not None:
|
||||
# sin and cos are specific to RoPE models; cache_position needed for the static cache
|
||||
cache_kwargs = {"sin": sin, "cos": cos, "cache_position": cache_position}
|
||||
key_states, value_states = past_key_value.update(key_states, value_states, self.layer_idx, cache_kwargs)
|
||||
|
||||
key_states = repeat_kv(key_states, self.num_key_value_groups)
|
||||
value_states = repeat_kv(value_states, self.num_key_value_groups)
|
||||
|
||||
causal_mask = attention_mask
|
||||
if attention_mask is not None:
|
||||
causal_mask = causal_mask[:, :, :, : key_states.shape[-2]]
|
||||
|
||||
# SDPA with memory-efficient backend is currently (torch==2.1.2) bugged with non-contiguous inputs with custom attn_mask,
|
||||
# Reference: https://github.com/pytorch/pytorch/issues/112577.
|
||||
if query_states.device.type == "cuda" and causal_mask is not None:
|
||||
query_states = query_states.contiguous()
|
||||
key_states = key_states.contiguous()
|
||||
value_states = value_states.contiguous()
|
||||
|
||||
# We dispatch to SDPA's Flash Attention or Efficient kernels via this `is_causal` if statement instead of an inline conditional assignment
|
||||
# in SDPA to support both torch.compile's dynamic shapes and full graph options. An inline conditional prevents dynamic shapes from compiling.
|
||||
is_causal = True if causal_mask is None and q_len > 1 else False
|
||||
|
||||
attn_output = torch.nn.functional.scaled_dot_product_attention(
|
||||
query_states,
|
||||
key_states,
|
||||
value_states,
|
||||
attn_mask=causal_mask,
|
||||
dropout_p=self.attention_dropout if self.training else 0.0,
|
||||
is_causal=is_causal,
|
||||
)
|
||||
|
||||
attn_output = attn_output.transpose(1, 2).contiguous()
|
||||
attn_output = attn_output.view(bsz, q_len, self.hidden_size)
|
||||
|
||||
attn_output = self.o_proj(attn_output)
|
||||
|
||||
return attn_output, None, past_key_value
|
||||
|
||||
|
||||
SUPER_ATTENTION_CLASSES = {
|
||||
"eager": SuperAttention,
|
||||
"flash_attention_2": SuperFlashAttention2,
|
||||
"sdpa": SuperSdpaAttention,
|
||||
}
|
||||
|
||||
|
||||
class SuperDecoderLayer(nn.Module):
|
||||
def __init__(self, config: SuperConfig, layer_idx: int):
|
||||
super().__init__()
|
||||
self.hidden_size = config.hidden_size
|
||||
|
||||
self.self_attn = SUPER_ATTENTION_CLASSES[config._attn_implementation](config=config, layer_idx=layer_idx)
|
||||
|
||||
self.mlp = SuperMLP(config)
|
||||
self.input_layernorm = SuperRMSNorm(config.hidden_size, eps=config.rms_norm_eps)
|
||||
self.post_attention_layernorm = SuperRMSNorm(config.hidden_size, eps=config.rms_norm_eps)
|
||||
|
||||
def forward(
|
||||
self,
|
||||
hidden_states: torch.Tensor,
|
||||
attention_mask: Optional[torch.Tensor] = None,
|
||||
position_ids: Optional[torch.LongTensor] = None,
|
||||
past_key_value: Optional[Cache] = None,
|
||||
output_attentions: Optional[bool] = False,
|
||||
use_cache: Optional[bool] = False,
|
||||
cache_position: Optional[torch.LongTensor] = None,
|
||||
) -> Tuple[torch.FloatTensor, Optional[Tuple[torch.FloatTensor, torch.FloatTensor]]]:
|
||||
"""
|
||||
Args:
|
||||
hidden_states (`torch.FloatTensor`): input to the layer of shape `(batch, seq_len, embed_dim)`
|
||||
attention_mask (`torch.FloatTensor`, *optional*):
|
||||
attention mask of size `(batch_size, sequence_length)` if flash attention is used or `(batch_size, 1,
|
||||
query_sequence_length, key_sequence_length)` if default attention is used.
|
||||
output_attentions (`bool`, *optional*):
|
||||
Whether or not to return the attentions tensors of all attention layers. See `attentions` under
|
||||
returned tensors for more detail.
|
||||
use_cache (`bool`, *optional*):
|
||||
If set to `True`, `past_key_values` key value states are returned and can be used to speed up decoding
|
||||
(see `past_key_values`).
|
||||
past_key_value (`Tuple(torch.FloatTensor)`, *optional*): cached past key and value projection states
|
||||
"""
|
||||
residual = hidden_states
|
||||
|
||||
hidden_states = self.input_layernorm(hidden_states)
|
||||
|
||||
# Self Attention
|
||||
hidden_states, self_attn_weights, present_key_value = self.self_attn(
|
||||
hidden_states=hidden_states,
|
||||
attention_mask=attention_mask,
|
||||
position_ids=position_ids,
|
||||
past_key_value=past_key_value,
|
||||
output_attentions=output_attentions,
|
||||
use_cache=use_cache,
|
||||
cache_position=cache_position,
|
||||
)
|
||||
hidden_states = residual + hidden_states
|
||||
|
||||
# Fully Connected
|
||||
residual = hidden_states
|
||||
hidden_states = self.post_attention_layernorm(hidden_states)
|
||||
hidden_states = self.mlp(hidden_states)
|
||||
hidden_states = residual + hidden_states
|
||||
|
||||
outputs = (hidden_states,)
|
||||
|
||||
if output_attentions:
|
||||
outputs += (self_attn_weights,)
|
||||
|
||||
if use_cache:
|
||||
outputs += (present_key_value,)
|
||||
|
||||
return outputs
|
||||
|
||||
|
||||
SUPER_START_DOCSTRING = r"""
|
||||
This model inherits from [`PreTrainedModel`]. Check the superclass documentation for the generic methods the
|
||||
library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads
|
||||
etc.)
|
||||
|
||||
This model is also a PyTorch [torch.nn.Module](https://pytorch.org/docs/stable/nn.html#torch.nn.Module) subclass.
|
||||
Use it as a regular PyTorch Module and refer to the PyTorch documentation for all matter related to general usage
|
||||
and behavior.
|
||||
|
||||
Parameters:
|
||||
config ([`SuperConfig`]):
|
||||
Model configuration class with all the parameters of the model. Initializing with a config file does not
|
||||
load the weights associated with the model, only the configuration. Check out the
|
||||
[`~PreTrainedModel.from_pretrained`] method to load the model weights.
|
||||
"""
|
||||
|
||||
|
||||
@add_start_docstrings(
|
||||
"The bare Super Model outputting raw hidden-states without any specific head on top.",
|
||||
SUPER_START_DOCSTRING,
|
||||
)
|
||||
class SuperPreTrainedModel(PreTrainedModel):
|
||||
config_class = SuperConfig
|
||||
base_model_prefix = "model"
|
||||
supports_gradient_checkpointing = True
|
||||
_no_split_modules = ["SuperDecoderLayer"]
|
||||
_skip_keys_device_placement = ["past_key_values"]
|
||||
_supports_flash_attn_2 = True
|
||||
_supports_sdpa = True
|
||||
_supports_cache_class = True
|
||||
_supports_quantized_cache = True
|
||||
_supports_static_cache = True
|
||||
|
||||
def _init_weights(self, module):
|
||||
std = self.config.initializer_range
|
||||
if isinstance(module, nn.Linear):
|
||||
module.weight.data.normal_(mean=0.0, std=std)
|
||||
if module.bias is not None:
|
||||
module.bias.data.zero_()
|
||||
elif isinstance(module, nn.Embedding):
|
||||
module.weight.data.normal_(mean=0.0, std=std)
|
||||
if module.padding_idx is not None:
|
||||
module.weight.data[module.padding_idx].zero_()
|
||||
|
||||
|
||||
SUPER_INPUTS_DOCSTRING = r"""
|
||||
Args:
|
||||
input_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`):
|
||||
Indices of input sequence tokens in the vocabulary. Padding will be ignored by default should you provide
|
||||
it.
|
||||
|
||||
Indices can be obtained using [`AutoTokenizer`]. See [`PreTrainedTokenizer.encode`] and
|
||||
[`PreTrainedTokenizer.__call__`] for details.
|
||||
|
||||
[What are input IDs?](../glossary#input-ids)
|
||||
attention_mask (`torch.Tensor` of shape `(batch_size, sequence_length)`, *optional*):
|
||||
Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:
|
||||
|
||||
- 1 for tokens that are **not masked**,
|
||||
- 0 for tokens that are **masked**.
|
||||
|
||||
[What are attention masks?](../glossary#attention-mask)
|
||||
|
||||
Indices can be obtained using [`AutoTokenizer`]. See [`PreTrainedTokenizer.encode`] and
|
||||
[`PreTrainedTokenizer.__call__`] for details.
|
||||
|
||||
If `past_key_values` is used, optionally only the last `input_ids` have to be input (see
|
||||
`past_key_values`).
|
||||
|
||||
If you want to change padding behavior, you should read [`modeling_opt._prepare_decoder_attention_mask`]
|
||||
and modify to your needs. See diagram 1 in [the paper](https://arxiv.org/abs/1910.13461) for more
|
||||
information on the default strategy.
|
||||
|
||||
- 1 indicates the head is **not masked**,
|
||||
- 0 indicates the head is **masked**.
|
||||
position_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`, *optional*):
|
||||
Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0,
|
||||
config.n_positions - 1]`.
|
||||
|
||||
[What are position IDs?](../glossary#position-ids)
|
||||
past_key_values (`Cache` or `tuple(tuple(torch.FloatTensor))`, *optional*):
|
||||
Pre-computed hidden-states (key and values in the self-attention blocks and in the cross-attention
|
||||
blocks) that can be used to speed up sequential decoding. This typically consists in the `past_key_values`
|
||||
returned by the model at a previous stage of decoding, when `use_cache=True` or `config.use_cache=True`.
|
||||
|
||||
Two formats are allowed:
|
||||
- a [`~cache_utils.Cache`] instance;
|
||||
- Tuple of `tuple(torch.FloatTensor)` of length `config.n_layers`, with each tuple having 2 tensors of
|
||||
shape `(batch_size, num_heads, sequence_length, embed_size_per_head)`). This is also known as the legacy
|
||||
cache format.
|
||||
|
||||
The model will output the same cache format that is fed as input. If no `past_key_values` are passed, the
|
||||
legacy cache format will be returned.
|
||||
|
||||
If `past_key_values` are used, the user can optionally input only the last `input_ids` (those that don't
|
||||
have their past key value states given to this model) of shape `(batch_size, 1)` instead of all `input_ids`
|
||||
of shape `(batch_size, sequence_length)`.
|
||||
inputs_embeds (`torch.FloatTensor` of shape `(batch_size, sequence_length, hidden_size)`, *optional*):
|
||||
Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This
|
||||
is useful if you want more control over how to convert `input_ids` indices into associated vectors than the
|
||||
model's internal embedding lookup matrix.
|
||||
use_cache (`bool`, *optional*):
|
||||
If set to `True`, `past_key_values` key value states are returned and can be used to speed up decoding (see
|
||||
`past_key_values`).
|
||||
output_attentions (`bool`, *optional*):
|
||||
Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned
|
||||
tensors for more detail.
|
||||
output_hidden_states (`bool`, *optional*):
|
||||
Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for
|
||||
more detail.
|
||||
return_dict (`bool`, *optional*):
|
||||
Whether or not to return a [`~utils.ModelOutput`] instead of a plain tuple.
|
||||
cache_position (`torch.LongTensor` of shape `(sequence_length)`, *optional*):
|
||||
Indices depicting the position of the input sequence tokens in the sequence. Contrarily to `position_ids`,
|
||||
this tensor is not affected by padding. It is used to update the cache in the correct position and to infer
|
||||
the complete sequence length.
|
||||
"""
|
||||
|
||||
|
||||
@add_start_docstrings(
|
||||
"The bare Super Model outputting raw hidden-states without any specific head on top.",
|
||||
SUPER_START_DOCSTRING,
|
||||
)
|
||||
class SuperModel(SuperPreTrainedModel):
|
||||
"""
|
||||
Transformer decoder consisting of *config.num_hidden_layers* layers. Each layer is a [`SuperDecoderLayer`]
|
||||
|
||||
Args:
|
||||
config: SuperConfig
|
||||
"""
|
||||
|
||||
def __init__(self, config: SuperConfig):
|
||||
super().__init__(config)
|
||||
self.padding_idx = config.pad_token_id
|
||||
self.vocab_size = config.vocab_size
|
||||
|
||||
self.embed_tokens = nn.Embedding(config.vocab_size, config.hidden_size, self.padding_idx)
|
||||
self.layers = nn.ModuleList(
|
||||
[SuperDecoderLayer(config, layer_idx) for layer_idx in range(config.num_hidden_layers)]
|
||||
)
|
||||
self.norm = SuperRMSNorm(config.hidden_size, eps=config.rms_norm_eps)
|
||||
self.gradient_checkpointing = False
|
||||
|
||||
# Initialize weights and apply final processing
|
||||
self.post_init()
|
||||
|
||||
def get_input_embeddings(self):
|
||||
return self.embed_tokens
|
||||
|
||||
def set_input_embeddings(self, value):
|
||||
self.embed_tokens = value
|
||||
|
||||
@add_start_docstrings_to_model_forward(SUPER_INPUTS_DOCSTRING)
|
||||
def forward(
|
||||
self,
|
||||
input_ids: torch.LongTensor = None,
|
||||
attention_mask: Optional[torch.Tensor] = None,
|
||||
position_ids: Optional[torch.LongTensor] = None,
|
||||
past_key_values: Optional[Union[Cache, List[torch.FloatTensor]]] = None,
|
||||
inputs_embeds: Optional[torch.FloatTensor] = None,
|
||||
use_cache: Optional[bool] = None,
|
||||
output_attentions: Optional[bool] = None,
|
||||
output_hidden_states: Optional[bool] = None,
|
||||
return_dict: Optional[bool] = None,
|
||||
cache_position: Optional[torch.LongTensor] = None,
|
||||
) -> Union[Tuple, BaseModelOutputWithPast]:
|
||||
out = super().forward(
|
||||
input_ids,
|
||||
attention_mask,
|
||||
position_ids,
|
||||
past_key_values,
|
||||
inputs_embeds,
|
||||
use_cache,
|
||||
output_attentions,
|
||||
output_hidden_states,
|
||||
return_dict,
|
||||
cache_position,
|
||||
)
|
||||
out.logits *= 2**4
|
||||
return out
|
||||
|
||||
def _update_causal_mask(
|
||||
self,
|
||||
attention_mask: torch.Tensor,
|
||||
input_tensor: torch.Tensor,
|
||||
cache_position: torch.Tensor,
|
||||
past_key_values: Cache,
|
||||
output_attentions: bool,
|
||||
):
|
||||
# TODO: As of torch==2.2.0, the `attention_mask` passed to the model in `generate` is 2D and of dynamic length even when the static
|
||||
# KV cache is used. This is an issue for torch.compile which then recaptures cudagraphs at each decode steps due to the dynamic shapes.
|
||||
# (`recording cudagraph tree for symint key 13`, etc.), which is VERY slow. A workaround is `@torch.compiler.disable`, but this prevents using
|
||||
# `fullgraph=True`. See more context in https://github.com/huggingface/transformers/pull/29114
|
||||
|
||||
if self.config._attn_implementation == "flash_attention_2":
|
||||
if attention_mask is not None and 0.0 in attention_mask:
|
||||
return attention_mask
|
||||
return None
|
||||
|
||||
# For SDPA, when possible, we will rely on its `is_causal` argument instead of its `attn_mask` argument, in
|
||||
# order to dispatch on Flash Attention 2. This feature is not compatible with static cache, as SDPA will fail
|
||||
# to infer the attention mask.
|
||||
past_seen_tokens = past_key_values.get_seq_length() if past_key_values is not None else 0
|
||||
using_static_cache = isinstance(past_key_values, StaticCache)
|
||||
|
||||
# When output attentions is True, sdpa implementation's forward method calls the eager implementation's forward
|
||||
if self.config._attn_implementation == "sdpa" and not using_static_cache and not output_attentions:
|
||||
if AttentionMaskConverter._ignore_causal_mask_sdpa(
|
||||
attention_mask,
|
||||
inputs_embeds=input_tensor,
|
||||
past_key_values_length=past_seen_tokens,
|
||||
is_training=self.training,
|
||||
):
|
||||
return None
|
||||
|
||||
dtype, device = input_tensor.dtype, input_tensor.device
|
||||
min_dtype = torch.finfo(dtype).min
|
||||
sequence_length = input_tensor.shape[1]
|
||||
if using_static_cache:
|
||||
target_length = past_key_values.get_max_length()
|
||||
else:
|
||||
target_length = (
|
||||
attention_mask.shape[-1]
|
||||
if isinstance(attention_mask, torch.Tensor)
|
||||
else past_seen_tokens + sequence_length + 1
|
||||
)
|
||||
|
||||
if attention_mask is not None and attention_mask.dim() == 4:
|
||||
# in this case we assume that the mask comes already in inverted form and requires no inversion or slicing
|
||||
if attention_mask.max() != 0:
|
||||
raise ValueError("Custom 4D attention mask should be passed in inverted form with max==0`")
|
||||
causal_mask = attention_mask
|
||||
else:
|
||||
causal_mask = torch.full(
|
||||
(sequence_length, target_length), fill_value=min_dtype, dtype=dtype, device=device
|
||||
)
|
||||
if sequence_length != 1:
|
||||
causal_mask = torch.triu(causal_mask, diagonal=1)
|
||||
causal_mask *= torch.arange(target_length, device=device) > cache_position.reshape(-1, 1)
|
||||
causal_mask = causal_mask[None, None, :, :].expand(input_tensor.shape[0], 1, -1, -1)
|
||||
if attention_mask is not None:
|
||||
causal_mask = causal_mask.clone() # copy to contiguous memory for in-place edit
|
||||
mask_length = attention_mask.shape[-1]
|
||||
padding_mask = causal_mask[:, :, :, :mask_length] + attention_mask[:, None, None, :]
|
||||
padding_mask = padding_mask == 0
|
||||
causal_mask[:, :, :, :mask_length] = causal_mask[:, :, :, :mask_length].masked_fill(
|
||||
padding_mask, min_dtype
|
||||
)
|
||||
if (
|
||||
self.config._attn_implementation == "sdpa"
|
||||
and attention_mask is not None
|
||||
and attention_mask.device.type == "cuda"
|
||||
and not output_attentions
|
||||
):
|
||||
# Attend to all tokens in fully masked rows in the causal_mask, for example the relevant first rows when
|
||||
# using left padding. This is required by F.scaled_dot_product_attention memory-efficient attention path.
|
||||
# Details: https://github.com/pytorch/pytorch/issues/110213
|
||||
causal_mask = AttentionMaskConverter._unmask_unattended(causal_mask, min_dtype)
|
||||
|
||||
return causal_mask
|
||||
Loading…
Reference in New Issue