deepseekrzz
commited on
Commit
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Parent(s):
9005c29
Set `model_type` to `llama` (#6)
Browse files- Set `model_type` to `llama` (0b511b8f454d3a4502e08b8da9d551bdb1c6dc78)
- config.json +29 -50
- configuration_deepseek.py +0 -206
- modeling_deepseek.py +0 -1916
config.json
CHANGED
@@ -1,52 +1,31 @@
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"num_experts_per_tok": null,
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"num_hidden_layers": 30,
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"num_key_value_heads": 32,
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"pretraining_tp": 1,
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"q_lora_rank": null,
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"qk_nope_head_dim": 0,
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"qk_rope_head_dim": null,
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"rms_norm_eps": 1e-06,
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"rope_scaling": null,
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"rope_theta": 10000,
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"routed_scaling_factor": 1.0,
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"scoring_func": null,
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"seq_aux": true,
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"tie_word_embeddings": false,
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"topk_group": 1,
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"topk_method": "group_limited_greedy",
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"torch_dtype": "bfloat16",
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"transformers_version": "4.33.1",
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"use_cache": true,
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"v_head_dim": null,
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"vocab_size": 102400
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}
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{
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"architectures": [
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"LlamaForCausalLM"
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],
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"attention_bias": false,
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"attention_dropout": 0.0,
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"bos_token_id": 100000,
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"eos_token_id": 100001,
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"hidden_act": "silu",
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"hidden_size": 4096,
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"initializer_range": 0.02,
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"intermediate_size": 11008,
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"max_position_embeddings": 4096,
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"model_type": "llama",
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"num_attention_heads": 32,
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"num_hidden_layers": 30,
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"num_key_value_heads": 32,
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"pretraining_tp": 1,
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"quantization": {
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"group_size": 64,
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"bits": 8
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},
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"rms_norm_eps": 1e-06,
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"rope_scaling": null,
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"rope_theta": 10000,
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"tie_word_embeddings": false,
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"torch_dtype": "bfloat16",
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"transformers_version": "4.33.1",
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"use_cache": true,
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"vocab_size": 102400
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}
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configuration_deepseek.py
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from transformers.configuration_utils import PretrainedConfig
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from transformers.utils import logging
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logger = logging.get_logger(__name__)
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DEEPSEEK_PRETRAINED_CONFIG_ARCHIVE_MAP = {}
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class DeepseekConfig(PretrainedConfig):
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r"""
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This is the configuration class to store the configuration of a [`DeepseekModel`]. It is used to instantiate an DeepSeek
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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 DeepSeek-V2.
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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 102400):
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Vocabulary size of the Deep model. Defines the number of different tokens that can be represented by the
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`inputs_ids` passed when calling [`DeepseekModel`]
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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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moe_intermediate_size (`int`, *optional*, defaults to 1407):
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Dimension of the MoE 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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n_shared_experts (`int`, *optional*, defaults to None):
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Number of shared experts, None means dense model.
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n_routed_experts (`int`, *optional*, defaults to None):
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Number of routed experts, None means dense model.
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routed_scaling_factor (`float`, *optional*, defaults to 1.0):
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Scaling factor or routed experts.
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topk_method (`str`, *optional*, defaults to `gready`):
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Topk method used in routed gate.
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n_group (`int`, *optional*, defaults to None):
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Number of groups for routed experts.
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topk_group (`int`, *optional*, defaults to None):
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Number of selected groups for each token(for each token, ensuring the selected experts is only within `topk_group` groups).
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num_experts_per_tok (`int`, *optional*, defaults to None):
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Number of selected experts, None means dense model.
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moe_layer_freq (`int`, *optional*, defaults to 1):
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The frequency of the MoE layer: one expert layer for every `moe_layer_freq - 1` dense layers.
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first_k_dense_replace (`int`, *optional*, defaults to 0):
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Number of dense layers in shallow layers(embed->dense->dense->...->dense->moe->moe...->lm_head).
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\--k dense layers--/
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norm_topk_prob (`bool`, *optional*, defaults to False):
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Whether to normalize the weights of the routed experts.
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scoring_func (`str`, *optional*, defaults to 'softmax'):
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Method of computing expert weights.
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aux_loss_alpha (`float`, *optional*, defaults to 0.001):
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Auxiliary loss weight coefficient.
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seq_aux = (`bool`, *optional*, defaults to True):
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Whether to compute the auxiliary loss for each individual sample.
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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.
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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/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.
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attention_bias (`bool`, defaults to `False`, *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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```python
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>>> from transformers import DeepseekModel, DeepseekConfig
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>>> # Initializing a Deepseek style configuration
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>>> configuration = DeepseekConfig()
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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 = "deepseek"
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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=102400,
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hidden_size=4096,
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intermediate_size=11008,
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moe_intermediate_size = 1407,
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num_hidden_layers=30,
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num_attention_heads=32,
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num_key_value_heads=32,
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n_shared_experts = None,
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n_routed_experts = None,
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ep_size = 1,
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routed_scaling_factor = 1.0,
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kv_lora_rank = 512,
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q_lora_rank = 1536,
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qk_rope_head_dim = 64,
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v_head_dim = 128,
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qk_nope_head_dim = 128,
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topk_method = 'gready',
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n_group = None,
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topk_group = None,
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num_experts_per_tok = None,
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moe_layer_freq = 1,
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first_k_dense_replace = 0,
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norm_topk_prob = False,
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scoring_func = 'softmax',
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aux_loss_alpha = 0.001,
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seq_aux = True,
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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=100000,
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eos_token_id=100001,
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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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**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.moe_intermediate_size = moe_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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self.n_shared_experts = n_shared_experts
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self.n_routed_experts = n_routed_experts
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self.ep_size = ep_size
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self.routed_scaling_factor = routed_scaling_factor
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self.kv_lora_rank = kv_lora_rank
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self.q_lora_rank = q_lora_rank
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self.qk_rope_head_dim = qk_rope_head_dim
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self.v_head_dim = v_head_dim
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self.qk_nope_head_dim = qk_nope_head_dim
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self.topk_method = topk_method
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self.n_group = n_group
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self.topk_group = topk_group
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self.num_experts_per_tok = num_experts_per_tok
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self.moe_layer_freq = moe_layer_freq
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self.first_k_dense_replace = first_k_dense_replace
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self.norm_topk_prob = norm_topk_prob
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self.scoring_func = scoring_func
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self.aux_loss_alpha = aux_loss_alpha
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self.seq_aux = seq_aux
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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.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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modeling_deepseek.py
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# coding=utf-8
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# Copyright 2023 DeepSeek-AI and The HuggingFace Inc. team. All rights reserved.
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#
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# This code is based on EleutherAI's GPT-NeoX library and the GPT-NeoX
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# and OPT implementations in this library. It has been modified from its
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# original forms to accommodate minor architectural differences compared
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# to GPT-NeoX and OPT used by the Meta AI team that trained the model.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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""" PyTorch DeepSeek model."""
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import math
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import warnings
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from typing import List, Optional, Tuple, Union
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import torch
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import torch.nn.functional as F
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import torch.utils.checkpoint
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from torch import nn
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from torch.nn import BCEWithLogitsLoss, CrossEntropyLoss, MSELoss
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from transformers.activations import ACT2FN
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from transformers.cache_utils import Cache, DynamicCache
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from transformers.modeling_attn_mask_utils import (
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AttentionMaskConverter,
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_prepare_4d_attention_mask,
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_prepare_4d_causal_attention_mask,
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)
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from transformers.modeling_outputs import (
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BaseModelOutputWithPast,
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CausalLMOutputWithPast,
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SequenceClassifierOutputWithPast,
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)
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from transformers.modeling_utils import PreTrainedModel
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from transformers.pytorch_utils import (
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ALL_LAYERNORM_LAYERS,
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is_torch_greater_or_equal_than_1_13,
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)
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from transformers.utils import (
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add_start_docstrings,
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add_start_docstrings_to_model_forward,
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is_flash_attn_2_available,
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is_flash_attn_greater_or_equal_2_10,
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logging,
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replace_return_docstrings,
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)
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from transformers.utils.import_utils import is_torch_fx_available
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from .configuration_deepseek import DeepseekV2Config
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import torch.distributed as dist
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import numpy as np
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if is_flash_attn_2_available():
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from flash_attn import flash_attn_func, flash_attn_varlen_func
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from flash_attn.bert_padding import index_first_axis, pad_input, unpad_input # noqa
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# This makes `_prepare_4d_causal_attention_mask` a leaf function in the FX graph.
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# It means that the function will not be traced through and simply appear as a node in the graph.
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if is_torch_fx_available():
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if not is_torch_greater_or_equal_than_1_13:
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import torch.fx
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_prepare_4d_causal_attention_mask = torch.fx.wrap(_prepare_4d_causal_attention_mask)
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logger = logging.get_logger(__name__)
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_CONFIG_FOR_DOC = "DeepseekV2Config"
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def _get_unpad_data(attention_mask):
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seqlens_in_batch = attention_mask.sum(dim=-1, dtype=torch.int32)
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indices = torch.nonzero(attention_mask.flatten(), as_tuple=False).flatten()
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max_seqlen_in_batch = seqlens_in_batch.max().item()
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cu_seqlens = F.pad(
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torch.cumsum(seqlens_in_batch, dim=0, dtype=torch.torch.int32), (1, 0)
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)
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return (
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indices,
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cu_seqlens,
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max_seqlen_in_batch,
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)
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class DeepseekV2RMSNorm(nn.Module):
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def __init__(self, hidden_size, eps=1e-6):
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"""
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DeepseekV2RMSNorm is equivalent to T5LayerNorm
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"""
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super().__init__()
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self.weight = nn.Parameter(torch.ones(hidden_size))
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self.variance_epsilon = eps
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def forward(self, hidden_states):
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input_dtype = hidden_states.dtype
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hidden_states = hidden_states.to(torch.float32)
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variance = hidden_states.pow(2).mean(-1, keepdim=True)
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hidden_states = hidden_states * torch.rsqrt(variance + self.variance_epsilon)
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return self.weight * hidden_states.to(input_dtype)
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ALL_LAYERNORM_LAYERS.append(DeepseekV2RMSNorm)
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class DeepseekV2RotaryEmbedding(nn.Module):
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def __init__(self, dim, max_position_embeddings=2048, base=10000, device=None):
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super().__init__()
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self.dim = dim
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self.max_position_embeddings = max_position_embeddings
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self.base = base
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inv_freq = 1.0 / (
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self.base ** (torch.arange(0, self.dim, 2).float().to(device) / self.dim)
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)
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self.register_buffer("inv_freq", inv_freq, persistent=False)
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# Build here to make `torch.jit.trace` work.
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self._set_cos_sin_cache(
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seq_len=max_position_embeddings,
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device=self.inv_freq.device,
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dtype=torch.get_default_dtype(),
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)
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self.max_seq_len_cached = None
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def _set_cos_sin_cache(self, seq_len, device, dtype):
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self.max_seq_len_cached = seq_len
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t = torch.arange(
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self.max_seq_len_cached, device=device, dtype=self.inv_freq.dtype
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)
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freqs = torch.outer(t, self.inv_freq.to(t.device))
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# Different from paper, but it uses a different permutation in order to obtain the same calculation
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emb = torch.cat((freqs, freqs), dim=-1)
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self.register_buffer("cos_cached", emb.cos().to(dtype), persistent=False)
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self.register_buffer("sin_cached", emb.sin().to(dtype), persistent=False)
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def forward(self, x, seq_len=None):
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# x: [bs, num_attention_heads, seq_len, head_size]
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if self.max_seq_len_cached is None or seq_len > self.max_seq_len_cached:
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self._set_cos_sin_cache(seq_len=seq_len, device=x.device, dtype=x.dtype)
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return (
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self.cos_cached[:seq_len].to(dtype=x.dtype),
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self.sin_cached[:seq_len].to(dtype=x.dtype),
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)
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# Copied from transformers.models.llama.modeling_llama.LlamaLinearScalingRotaryEmbedding with Llama->DeepseekV2
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class DeepseekV2LinearScalingRotaryEmbedding(DeepseekV2RotaryEmbedding):
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"""DeepseekV2RotaryEmbedding extended with linear scaling. Credits to the Reddit user /u/kaiokendev"""
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def __init__(
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self,
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dim,
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max_position_embeddings=2048,
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base=10000,
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device=None,
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scaling_factor=1.0,
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):
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self.scaling_factor = scaling_factor
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super().__init__(dim, max_position_embeddings, base, device)
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def _set_cos_sin_cache(self, seq_len, device, dtype):
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self.max_seq_len_cached = seq_len
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t = torch.arange(
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self.max_seq_len_cached, device=device, dtype=self.inv_freq.dtype
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)
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t = t / self.scaling_factor
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178 |
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freqs = torch.outer(t, self.inv_freq)
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# Different from paper, but it uses a different permutation in order to obtain the same calculation
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emb = torch.cat((freqs, freqs), dim=-1)
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self.register_buffer("cos_cached", emb.cos().to(dtype), persistent=False)
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self.register_buffer("sin_cached", emb.sin().to(dtype), persistent=False)
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184 |
-
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185 |
-
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# Copied from transformers.models.llama.modeling_llama.LlamaDynamicNTKScalingRotaryEmbedding with Llama->DeepseekV2
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class DeepseekV2DynamicNTKScalingRotaryEmbedding(DeepseekV2RotaryEmbedding):
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"""DeepseekV2RotaryEmbedding extended with Dynamic NTK scaling. Credits to the Reddit users /u/bloc97 and /u/emozilla"""
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189 |
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def __init__(
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self,
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dim,
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max_position_embeddings=2048,
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base=10000,
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device=None,
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scaling_factor=1.0,
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):
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self.scaling_factor = scaling_factor
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super().__init__(dim, max_position_embeddings, base, device)
|
200 |
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def _set_cos_sin_cache(self, seq_len, device, dtype):
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self.max_seq_len_cached = seq_len
|
203 |
-
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if seq_len > self.max_position_embeddings:
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base = self.base * (
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(self.scaling_factor * seq_len / self.max_position_embeddings)
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- (self.scaling_factor - 1)
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) ** (self.dim / (self.dim - 2))
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inv_freq = 1.0 / (
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base ** (torch.arange(0, self.dim, 2).float().to(device) / self.dim)
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)
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self.register_buffer("inv_freq", inv_freq, persistent=False)
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213 |
-
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t = torch.arange(
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self.max_seq_len_cached, device=device, dtype=self.inv_freq.dtype
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-
)
|
217 |
-
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freqs = torch.outer(t, self.inv_freq)
|
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# Different from paper, but it uses a different permutation in order to obtain the same calculation
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emb = torch.cat((freqs, freqs), dim=-1)
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self.register_buffer("cos_cached", emb.cos().to(dtype), persistent=False)
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self.register_buffer("sin_cached", emb.sin().to(dtype), persistent=False)
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223 |
-
|
224 |
-
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225 |
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# Inverse dim formula to find dim based on number of rotations
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226 |
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def yarn_find_correction_dim(
|
227 |
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num_rotations, dim, base=10000, max_position_embeddings=2048
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):
|
229 |
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return (dim * math.log(max_position_embeddings / (num_rotations * 2 * math.pi))) / (
|
230 |
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2 * math.log(base)
|
231 |
-
)
|
232 |
-
|
233 |
-
|
234 |
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# Find dim range bounds based on rotations
|
235 |
-
def yarn_find_correction_range(
|
236 |
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low_rot, high_rot, dim, base=10000, max_position_embeddings=2048
|
237 |
-
):
|
238 |
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low = math.floor(
|
239 |
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yarn_find_correction_dim(low_rot, dim, base, max_position_embeddings)
|
240 |
-
)
|
241 |
-
high = math.ceil(
|
242 |
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yarn_find_correction_dim(high_rot, dim, base, max_position_embeddings)
|
243 |
-
)
|
244 |
-
return max(low, 0), min(high, dim - 1) # Clamp values just in case
|
245 |
-
|
246 |
-
|
247 |
-
def yarn_get_mscale(scale=1, mscale=1):
|
248 |
-
if scale <= 1:
|
249 |
-
return 1.0
|
250 |
-
return 0.1 * mscale * math.log(scale) + 1.0
|
251 |
-
|
252 |
-
|
253 |
-
def yarn_linear_ramp_mask(min, max, dim):
|
254 |
-
if min == max:
|
255 |
-
max += 0.001 # Prevent singularity
|
256 |
-
|
257 |
-
linear_func = (torch.arange(dim, dtype=torch.float32) - min) / (max - min)
|
258 |
-
ramp_func = torch.clamp(linear_func, 0, 1)
|
259 |
-
return ramp_func
|
260 |
-
|
261 |
-
|
262 |
-
class DeepseekV2YarnRotaryEmbedding(DeepseekV2RotaryEmbedding):
|
263 |
-
|
264 |
-
def __init__(
|
265 |
-
self,
|
266 |
-
dim,
|
267 |
-
max_position_embeddings=2048,
|
268 |
-
base=10000,
|
269 |
-
device=None,
|
270 |
-
scaling_factor=1.0,
|
271 |
-
original_max_position_embeddings=4096,
|
272 |
-
beta_fast=32,
|
273 |
-
beta_slow=1,
|
274 |
-
mscale=1,
|
275 |
-
mscale_all_dim=0,
|
276 |
-
):
|
277 |
-
self.scaling_factor = scaling_factor
|
278 |
-
self.original_max_position_embeddings = original_max_position_embeddings
|
279 |
-
self.beta_fast = beta_fast
|
280 |
-
self.beta_slow = beta_slow
|
281 |
-
self.mscale = mscale
|
282 |
-
self.mscale_all_dim = mscale_all_dim
|
283 |
-
super().__init__(dim, max_position_embeddings, base, device)
|
284 |
-
|
285 |
-
def _set_cos_sin_cache(self, seq_len, device, dtype):
|
286 |
-
self.max_seq_len_cached = seq_len
|
287 |
-
dim = self.dim
|
288 |
-
|
289 |
-
freq_extra = 1.0 / (
|
290 |
-
self.base
|
291 |
-
** (torch.arange(0, dim, 2, dtype=torch.float32, device=device) / dim)
|
292 |
-
)
|
293 |
-
freq_inter = 1.0 / (
|
294 |
-
self.scaling_factor
|
295 |
-
* self.base
|
296 |
-
** (torch.arange(0, dim, 2, dtype=torch.float32, device=device) / dim)
|
297 |
-
)
|
298 |
-
|
299 |
-
low, high = yarn_find_correction_range(
|
300 |
-
self.beta_fast,
|
301 |
-
self.beta_slow,
|
302 |
-
dim,
|
303 |
-
self.base,
|
304 |
-
self.original_max_position_embeddings,
|
305 |
-
)
|
306 |
-
inv_freq_mask = 1.0 - yarn_linear_ramp_mask(low, high, dim // 2).to(
|
307 |
-
device=device, dtype=torch.float32
|
308 |
-
)
|
309 |
-
inv_freq = freq_inter * (1 - inv_freq_mask) + freq_extra * inv_freq_mask
|
310 |
-
self.register_buffer("inv_freq", inv_freq, persistent=False)
|
311 |
-
|
312 |
-
t = torch.arange(seq_len, device=device, dtype=torch.float32)
|
313 |
-
|
314 |
-
freqs = torch.outer(t, inv_freq)
|
315 |
-
|
316 |
-
_mscale = float(
|
317 |
-
yarn_get_mscale(self.scaling_factor, self.mscale)
|
318 |
-
/ yarn_get_mscale(self.scaling_factor, self.mscale_all_dim)
|
319 |
-
)
|
320 |
-
|
321 |
-
emb = torch.cat((freqs, freqs), dim=-1)
|
322 |
-
self.register_buffer(
|
323 |
-
"cos_cached", (emb.cos() * _mscale).to(dtype), persistent=False
|
324 |
-
)
|
325 |
-
self.register_buffer(
|
326 |
-
"sin_cached", (emb.sin() * _mscale).to(dtype), persistent=False
|
327 |
-
)
|
328 |
-
|
329 |
-
|
330 |
-
# Copied from transformers.models.llama.modeling_llama.rotate_half
|
331 |
-
def rotate_half(x):
|
332 |
-
"""Rotates half the hidden dims of the input."""
|
333 |
-
x1 = x[..., : x.shape[-1] // 2]
|
334 |
-
x2 = x[..., x.shape[-1] // 2 :]
|
335 |
-
return torch.cat((-x2, x1), dim=-1)
|
336 |
-
|
337 |
-
|
338 |
-
# Copied from transformers.models.llama.modeling_llama.apply_rotary_pos_emb
|
339 |
-
def apply_rotary_pos_emb(q, k, cos, sin, position_ids, unsqueeze_dim=1):
|
340 |
-
"""Applies Rotary Position Embedding to the query and key tensors.
|
341 |
-
|
342 |
-
Args:
|
343 |
-
q (`torch.Tensor`): The query tensor.
|
344 |
-
k (`torch.Tensor`): The key tensor.
|
345 |
-
cos (`torch.Tensor`): The cosine part of the rotary embedding.
|
346 |
-
sin (`torch.Tensor`): The sine part of the rotary embedding.
|
347 |
-
position_ids (`torch.Tensor`):
|
348 |
-
The position indices of the tokens corresponding to the query and key tensors. For example, this can be
|
349 |
-
used to pass offsetted position ids when working with a KV-cache.
|
350 |
-
unsqueeze_dim (`int`, *optional*, defaults to 1):
|
351 |
-
The 'unsqueeze_dim' argument specifies the dimension along which to unsqueeze cos[position_ids] and
|
352 |
-
sin[position_ids] so that they can be properly broadcasted to the dimensions of q and k. For example, note
|
353 |
-
that cos[position_ids] and sin[position_ids] have the shape [batch_size, seq_len, head_dim]. Then, if q and
|
354 |
-
k have the shape [batch_size, heads, seq_len, head_dim], then setting unsqueeze_dim=1 makes
|
355 |
-
cos[position_ids] and sin[position_ids] broadcastable to the shapes of q and k. Similarly, if q and k have
|
356 |
-
the shape [batch_size, seq_len, heads, head_dim], then set unsqueeze_dim=2.
|
357 |
-
Returns:
|
358 |
-
`tuple(torch.Tensor)` comprising of the query and key tensors rotated using the Rotary Position Embedding.
|
359 |
-
"""
|
360 |
-
cos = cos[position_ids].unsqueeze(unsqueeze_dim)
|
361 |
-
sin = sin[position_ids].unsqueeze(unsqueeze_dim)
|
362 |
-
|
363 |
-
b, h, s, d = q.shape
|
364 |
-
q = q.view(b, h, s, d // 2, 2).transpose(4, 3).reshape(b, h, s, d)
|
365 |
-
|
366 |
-
b, h, s, d = k.shape
|
367 |
-
k = k.view(b, h, s, d // 2, 2).transpose(4, 3).reshape(b, h, s, d)
|
368 |
-
|
369 |
-
q_embed = (q * cos) + (rotate_half(q) * sin)
|
370 |
-
k_embed = (k * cos) + (rotate_half(k) * sin)
|
371 |
-
return q_embed, k_embed
|
372 |
-
|
373 |
-
|
374 |
-
class DeepseekV2MLP(nn.Module):
|
375 |
-
def __init__(self, config, hidden_size=None, intermediate_size=None):
|
376 |
-
super().__init__()
|
377 |
-
self.config = config
|
378 |
-
self.hidden_size = config.hidden_size if hidden_size is None else hidden_size
|
379 |
-
self.intermediate_size = (
|
380 |
-
config.intermediate_size if intermediate_size is None else intermediate_size
|
381 |
-
)
|
382 |
-
|
383 |
-
self.gate_proj = nn.Linear(self.hidden_size, self.intermediate_size, bias=False)
|
384 |
-
self.up_proj = nn.Linear(self.hidden_size, self.intermediate_size, bias=False)
|
385 |
-
self.down_proj = nn.Linear(self.intermediate_size, self.hidden_size, bias=False)
|
386 |
-
self.act_fn = ACT2FN[config.hidden_act]
|
387 |
-
|
388 |
-
def forward(self, x):
|
389 |
-
down_proj = self.down_proj(self.act_fn(self.gate_proj(x)) * self.up_proj(x))
|
390 |
-
return down_proj
|
391 |
-
|
392 |
-
|
393 |
-
class MoEGate(nn.Module):
|
394 |
-
def __init__(self, config):
|
395 |
-
super().__init__()
|
396 |
-
self.config = config
|
397 |
-
self.top_k = config.num_experts_per_tok
|
398 |
-
self.n_routed_experts = config.n_routed_experts
|
399 |
-
self.routed_scaling_factor = config.routed_scaling_factor
|
400 |
-
self.scoring_func = config.scoring_func
|
401 |
-
self.alpha = config.aux_loss_alpha
|
402 |
-
self.seq_aux = config.seq_aux
|
403 |
-
self.topk_method = config.topk_method
|
404 |
-
self.n_group = config.n_group
|
405 |
-
self.topk_group = config.topk_group
|
406 |
-
|
407 |
-
# topk selection algorithm
|
408 |
-
self.norm_topk_prob = config.norm_topk_prob
|
409 |
-
self.gating_dim = config.hidden_size
|
410 |
-
self.weight = nn.Parameter(
|
411 |
-
torch.empty((self.n_routed_experts, self.gating_dim))
|
412 |
-
)
|
413 |
-
self.reset_parameters()
|
414 |
-
|
415 |
-
def reset_parameters(self) -> None:
|
416 |
-
import torch.nn.init as init
|
417 |
-
|
418 |
-
init.kaiming_uniform_(self.weight, a=math.sqrt(5))
|
419 |
-
|
420 |
-
def forward(self, hidden_states):
|
421 |
-
bsz, seq_len, h = hidden_states.shape
|
422 |
-
### compute gating score
|
423 |
-
hidden_states = hidden_states.view(-1, h)
|
424 |
-
logits = F.linear(
|
425 |
-
hidden_states.type(torch.float32), self.weight.type(torch.float32), None
|
426 |
-
)
|
427 |
-
if self.scoring_func == "softmax":
|
428 |
-
scores = logits.softmax(dim=-1, dtype=torch.float32)
|
429 |
-
else:
|
430 |
-
raise NotImplementedError(
|
431 |
-
f"insupportable scoring function for MoE gating: {self.scoring_func}"
|
432 |
-
)
|
433 |
-
|
434 |
-
### select top-k experts
|
435 |
-
if self.topk_method == "greedy":
|
436 |
-
topk_weight, topk_idx = torch.topk(
|
437 |
-
scores, k=self.top_k, dim=-1, sorted=False
|
438 |
-
)
|
439 |
-
elif self.topk_method == "group_limited_greedy":
|
440 |
-
group_scores = (
|
441 |
-
scores.view(bsz * seq_len, self.n_group, -1).max(dim=-1).values
|
442 |
-
) # [n, n_group]
|
443 |
-
group_idx = torch.topk(
|
444 |
-
group_scores, k=self.topk_group, dim=-1, sorted=False
|
445 |
-
)[
|
446 |
-
1
|
447 |
-
] # [n, top_k_group]
|
448 |
-
group_mask = torch.zeros_like(group_scores) # [n, n_group]
|
449 |
-
group_mask.scatter_(1, group_idx, 1) # [n, n_group]
|
450 |
-
score_mask = (
|
451 |
-
group_mask.unsqueeze(-1)
|
452 |
-
.expand(
|
453 |
-
bsz * seq_len, self.n_group, self.n_routed_experts // self.n_group
|
454 |
-
)
|
455 |
-
.reshape(bsz * seq_len, -1)
|
456 |
-
) # [n, e]
|
457 |
-
tmp_scores = scores.masked_fill(~score_mask.bool(), 0.0) # [n, e]
|
458 |
-
topk_weight, topk_idx = torch.topk(
|
459 |
-
tmp_scores, k=self.top_k, dim=-1, sorted=False
|
460 |
-
)
|
461 |
-
|
462 |
-
### norm gate to sum 1
|
463 |
-
if self.top_k > 1 and self.norm_topk_prob:
|
464 |
-
denominator = topk_weight.sum(dim=-1, keepdim=True) + 1e-20
|
465 |
-
topk_weight = topk_weight / denominator
|
466 |
-
else:
|
467 |
-
topk_weight = topk_weight * self.routed_scaling_factor
|
468 |
-
### expert-level computation auxiliary loss
|
469 |
-
if self.training and self.alpha > 0.0:
|
470 |
-
scores_for_aux = scores
|
471 |
-
aux_topk = self.top_k
|
472 |
-
# always compute aux loss based on the naive greedy topk method
|
473 |
-
topk_idx_for_aux_loss = topk_idx.view(bsz, -1)
|
474 |
-
if self.seq_aux:
|
475 |
-
scores_for_seq_aux = scores_for_aux.view(bsz, seq_len, -1)
|
476 |
-
ce = torch.zeros(
|
477 |
-
bsz, self.n_routed_experts, device=hidden_states.device
|
478 |
-
)
|
479 |
-
ce.scatter_add_(
|
480 |
-
1,
|
481 |
-
topk_idx_for_aux_loss,
|
482 |
-
torch.ones(bsz, seq_len * aux_topk, device=hidden_states.device),
|
483 |
-
).div_(seq_len * aux_topk / self.n_routed_experts)
|
484 |
-
aux_loss = (ce * scores_for_seq_aux.mean(dim=1)).sum(
|
485 |
-
dim=1
|
486 |
-
).mean() * self.alpha
|
487 |
-
else:
|
488 |
-
mask_ce = F.one_hot(
|
489 |
-
topk_idx_for_aux_loss.view(-1), num_classes=self.n_routed_experts
|
490 |
-
)
|
491 |
-
ce = mask_ce.float().mean(0)
|
492 |
-
Pi = scores_for_aux.mean(0)
|
493 |
-
fi = ce * self.n_routed_experts
|
494 |
-
aux_loss = (Pi * fi).sum() * self.alpha
|
495 |
-
else:
|
496 |
-
aux_loss = None
|
497 |
-
return topk_idx, topk_weight, aux_loss
|
498 |
-
|
499 |
-
|
500 |
-
class AddAuxiliaryLoss(torch.autograd.Function):
|
501 |
-
"""
|
502 |
-
The trick function of adding auxiliary (aux) loss,
|
503 |
-
which includes the gradient of the aux loss during backpropagation.
|
504 |
-
"""
|
505 |
-
|
506 |
-
@staticmethod
|
507 |
-
def forward(ctx, x, loss):
|
508 |
-
assert loss.numel() == 1
|
509 |
-
ctx.dtype = loss.dtype
|
510 |
-
ctx.required_aux_loss = loss.requires_grad
|
511 |
-
return x
|
512 |
-
|
513 |
-
@staticmethod
|
514 |
-
def backward(ctx, grad_output):
|
515 |
-
grad_loss = None
|
516 |
-
if ctx.required_aux_loss:
|
517 |
-
grad_loss = torch.ones(1, dtype=ctx.dtype, device=grad_output.device)
|
518 |
-
return grad_output, grad_loss
|
519 |
-
|
520 |
-
|
521 |
-
class DeepseekV2MoE(nn.Module):
|
522 |
-
"""
|
523 |
-
A mixed expert module containing shared experts.
|
524 |
-
"""
|
525 |
-
|
526 |
-
def __init__(self, config):
|
527 |
-
super().__init__()
|
528 |
-
self.config = config
|
529 |
-
self.num_experts_per_tok = config.num_experts_per_tok
|
530 |
-
|
531 |
-
if hasattr(config, "ep_size") and config.ep_size > 1:
|
532 |
-
assert config.ep_size == dist.get_world_size()
|
533 |
-
self.ep_size = config.ep_size
|
534 |
-
self.experts_per_rank = config.n_routed_experts // config.ep_size
|
535 |
-
self.ep_rank = dist.get_rank()
|
536 |
-
self.experts = nn.ModuleList(
|
537 |
-
[
|
538 |
-
(
|
539 |
-
DeepseekV2MLP(
|
540 |
-
config, intermediate_size=config.moe_intermediate_size
|
541 |
-
)
|
542 |
-
if i >= self.ep_rank * self.experts_per_rank
|
543 |
-
and i < (self.ep_rank + 1) * self.experts_per_rank
|
544 |
-
else None
|
545 |
-
)
|
546 |
-
for i in range(config.n_routed_experts)
|
547 |
-
]
|
548 |
-
)
|
549 |
-
else:
|
550 |
-
self.ep_size = 1
|
551 |
-
self.experts_per_rank = config.n_routed_experts
|
552 |
-
self.ep_rank = 0
|
553 |
-
self.experts = nn.ModuleList(
|
554 |
-
[
|
555 |
-
DeepseekV2MLP(config, intermediate_size=config.moe_intermediate_size)
|
556 |
-
for i in range(config.n_routed_experts)
|
557 |
-
]
|
558 |
-
)
|
559 |
-
self.gate = MoEGate(config)
|
560 |
-
if config.n_shared_experts is not None:
|
561 |
-
intermediate_size = config.moe_intermediate_size * config.n_shared_experts
|
562 |
-
self.shared_experts = DeepseekV2MLP(
|
563 |
-
config=config, intermediate_size=intermediate_size
|
564 |
-
)
|
565 |
-
|
566 |
-
def forward(self, hidden_states):
|
567 |
-
identity = hidden_states
|
568 |
-
orig_shape = hidden_states.shape
|
569 |
-
topk_idx, topk_weight, aux_loss = self.gate(hidden_states)
|
570 |
-
hidden_states = hidden_states.view(-1, hidden_states.shape[-1])
|
571 |
-
flat_topk_idx = topk_idx.view(-1)
|
572 |
-
if self.training:
|
573 |
-
hidden_states = hidden_states.repeat_interleave(
|
574 |
-
self.num_experts_per_tok, dim=0
|
575 |
-
)
|
576 |
-
y = torch.empty_like(hidden_states)
|
577 |
-
for i, expert in enumerate(self.experts):
|
578 |
-
y[flat_topk_idx == i] = expert(hidden_states[flat_topk_idx == i])
|
579 |
-
y = (y.view(*topk_weight.shape, -1) * topk_weight.unsqueeze(-1)).sum(dim=1)
|
580 |
-
y = y.view(*orig_shape)
|
581 |
-
y = AddAuxiliaryLoss.apply(y, aux_loss)
|
582 |
-
else:
|
583 |
-
y = self.moe_infer(hidden_states, topk_idx, topk_weight).view(*orig_shape)
|
584 |
-
if self.config.n_shared_experts is not None:
|
585 |
-
y = y + self.shared_experts(identity)
|
586 |
-
return y
|
587 |
-
|
588 |
-
@torch.no_grad()
|
589 |
-
def moe_infer(self, x, topk_ids, topk_weight):
|
590 |
-
cnts = topk_ids.new_zeros((topk_ids.shape[0], len(self.experts)))
|
591 |
-
cnts.scatter_(1, topk_ids, 1)
|
592 |
-
tokens_per_expert = cnts.sum(dim=0)
|
593 |
-
idxs = topk_ids.view(-1).argsort()
|
594 |
-
sorted_tokens = x[idxs // topk_ids.shape[1]]
|
595 |
-
sorted_tokens_shape = sorted_tokens.shape
|
596 |
-
if self.ep_size > 1:
|
597 |
-
tokens_per_ep_rank = tokens_per_expert.view(self.ep_size, -1).sum(dim=1)
|
598 |
-
tokens_per_expert_group = tokens_per_expert.new_empty(
|
599 |
-
tokens_per_expert.shape[0]
|
600 |
-
)
|
601 |
-
dist.all_to_all_single(tokens_per_expert_group, tokens_per_expert)
|
602 |
-
output_splits = (
|
603 |
-
tokens_per_expert_group.view(self.ep_size, -1)
|
604 |
-
.sum(1)
|
605 |
-
.cpu()
|
606 |
-
.numpy()
|
607 |
-
.tolist()
|
608 |
-
)
|
609 |
-
gathered_tokens = sorted_tokens.new_empty(
|
610 |
-
tokens_per_expert_group.sum(dim=0).cpu().item(), sorted_tokens.shape[1]
|
611 |
-
)
|
612 |
-
input_split_sizes = tokens_per_ep_rank.cpu().numpy().tolist()
|
613 |
-
dist.all_to_all(
|
614 |
-
list(gathered_tokens.split(output_splits)),
|
615 |
-
list(sorted_tokens.split(input_split_sizes)),
|
616 |
-
)
|
617 |
-
tokens_per_expert_post_gather = tokens_per_expert_group.view(
|
618 |
-
self.ep_size, self.experts_per_rank
|
619 |
-
).sum(dim=0)
|
620 |
-
gatherd_idxs = np.zeros(shape=(gathered_tokens.shape[0],), dtype=np.int32)
|
621 |
-
s = 0
|
622 |
-
for i, k in enumerate(tokens_per_expert_group.cpu().numpy()):
|
623 |
-
gatherd_idxs[s : s + k] = i % self.experts_per_rank
|
624 |
-
s += k
|
625 |
-
gatherd_idxs = gatherd_idxs.argsort()
|
626 |
-
sorted_tokens = gathered_tokens[gatherd_idxs]
|
627 |
-
tokens_per_expert = tokens_per_expert_post_gather
|
628 |
-
tokens_per_expert = tokens_per_expert.cpu().numpy()
|
629 |
-
|
630 |
-
outputs = []
|
631 |
-
start_idx = 0
|
632 |
-
for i, num_tokens in enumerate(tokens_per_expert):
|
633 |
-
end_idx = start_idx + num_tokens
|
634 |
-
if num_tokens == 0:
|
635 |
-
continue
|
636 |
-
expert = self.experts[i + self.ep_rank * self.experts_per_rank]
|
637 |
-
tokens_for_this_expert = sorted_tokens[start_idx:end_idx]
|
638 |
-
expert_out = expert(tokens_for_this_expert)
|
639 |
-
outputs.append(expert_out)
|
640 |
-
start_idx = end_idx
|
641 |
-
|
642 |
-
outs = torch.cat(outputs, dim=0) if len(outputs) else sorted_tokens.new_empty(0)
|
643 |
-
if self.ep_size > 1:
|
644 |
-
new_x = torch.empty_like(outs)
|
645 |
-
new_x[gatherd_idxs] = outs
|
646 |
-
gathered_tokens = new_x.new_empty(*sorted_tokens_shape)
|
647 |
-
dist.all_to_all(
|
648 |
-
list(gathered_tokens.split(input_split_sizes)),
|
649 |
-
list(new_x.split(output_splits)),
|
650 |
-
)
|
651 |
-
outs = gathered_tokens
|
652 |
-
|
653 |
-
new_x = torch.empty_like(outs)
|
654 |
-
new_x[idxs] = outs
|
655 |
-
final_out = (
|
656 |
-
new_x.view(*topk_ids.shape, -1)
|
657 |
-
.type(topk_weight.dtype)
|
658 |
-
.mul_(topk_weight.unsqueeze(dim=-1))
|
659 |
-
.sum(dim=1)
|
660 |
-
.type(new_x.dtype)
|
661 |
-
)
|
662 |
-
return final_out
|
663 |
-
|
664 |
-
|
665 |
-
# Copied from transformers.models.llama.modeling_llama.repeat_kv
|
666 |
-
def repeat_kv(hidden_states: torch.Tensor, n_rep: int) -> torch.Tensor:
|
667 |
-
"""
|
668 |
-
This is the equivalent of torch.repeat_interleave(x, dim=1, repeats=n_rep). The hidden states go from (batch,
|
669 |
-
num_key_value_heads, seqlen, head_dim) to (batch, num_attention_heads, seqlen, head_dim)
|
670 |
-
"""
|
671 |
-
batch, num_key_value_heads, slen, head_dim = hidden_states.shape
|
672 |
-
if n_rep == 1:
|
673 |
-
return hidden_states
|
674 |
-
hidden_states = hidden_states[:, :, None, :, :].expand(
|
675 |
-
batch, num_key_value_heads, n_rep, slen, head_dim
|
676 |
-
)
|
677 |
-
return hidden_states.reshape(batch, num_key_value_heads * n_rep, slen, head_dim)
|
678 |
-
|
679 |
-
|
680 |
-
# Copied from transformers.models.llama.modeling_llama.LlamaAttention with Llama->DeepseekV2
|
681 |
-
class DeepseekV2Attention(nn.Module):
|
682 |
-
"""Multi-headed attention from 'Attention Is All You Need' paper"""
|
683 |
-
|
684 |
-
def __init__(self, config: DeepseekV2Config, layer_idx: Optional[int] = None):
|
685 |
-
super().__init__()
|
686 |
-
self.config = config
|
687 |
-
self.layer_idx = layer_idx
|
688 |
-
if layer_idx is None:
|
689 |
-
logger.warning_once(
|
690 |
-
f"Instantiating {self.__class__.__name__} without passing `layer_idx` is not recommended and will "
|
691 |
-
"to errors during the forward call, if caching is used. Please make sure to provide a `layer_idx` "
|
692 |
-
"when creating this class."
|
693 |
-
)
|
694 |
-
|
695 |
-
self.attention_dropout = config.attention_dropout
|
696 |
-
self.hidden_size = config.hidden_size
|
697 |
-
self.num_heads = config.num_attention_heads
|
698 |
-
|
699 |
-
self.max_position_embeddings = config.max_position_embeddings
|
700 |
-
self.rope_theta = config.rope_theta
|
701 |
-
self.q_lora_rank = config.q_lora_rank
|
702 |
-
self.qk_rope_head_dim = config.qk_rope_head_dim
|
703 |
-
self.kv_lora_rank = config.kv_lora_rank
|
704 |
-
self.v_head_dim = config.v_head_dim
|
705 |
-
self.qk_nope_head_dim = config.qk_nope_head_dim
|
706 |
-
self.q_head_dim = config.qk_nope_head_dim + config.qk_rope_head_dim
|
707 |
-
|
708 |
-
self.is_causal = True
|
709 |
-
|
710 |
-
if self.q_lora_rank is None:
|
711 |
-
self.q_proj = nn.Linear(
|
712 |
-
self.hidden_size, self.num_heads * self.q_head_dim, bias=False
|
713 |
-
)
|
714 |
-
else:
|
715 |
-
self.q_a_proj = nn.Linear(
|
716 |
-
self.hidden_size, config.q_lora_rank, bias=config.attention_bias
|
717 |
-
)
|
718 |
-
self.q_a_layernorm = DeepseekV2RMSNorm(config.q_lora_rank)
|
719 |
-
self.q_b_proj = nn.Linear(
|
720 |
-
config.q_lora_rank, self.num_heads * self.q_head_dim, bias=False
|
721 |
-
)
|
722 |
-
|
723 |
-
self.kv_a_proj_with_mqa = nn.Linear(
|
724 |
-
self.hidden_size,
|
725 |
-
config.kv_lora_rank + config.qk_rope_head_dim,
|
726 |
-
bias=config.attention_bias,
|
727 |
-
)
|
728 |
-
self.kv_a_layernorm = DeepseekV2RMSNorm(config.kv_lora_rank)
|
729 |
-
self.kv_b_proj = nn.Linear(
|
730 |
-
config.kv_lora_rank,
|
731 |
-
self.num_heads
|
732 |
-
* (self.q_head_dim - self.qk_rope_head_dim + self.v_head_dim),
|
733 |
-
bias=False,
|
734 |
-
)
|
735 |
-
|
736 |
-
self.o_proj = nn.Linear(
|
737 |
-
self.num_heads * self.v_head_dim,
|
738 |
-
self.hidden_size,
|
739 |
-
bias=config.attention_bias,
|
740 |
-
)
|
741 |
-
self._init_rope()
|
742 |
-
|
743 |
-
self.softmax_scale = self.q_head_dim ** (-0.5)
|
744 |
-
if self.config.rope_scaling is not None:
|
745 |
-
mscale_all_dim = self.config.rope_scaling.get("mscale_all_dim", 0)
|
746 |
-
scaling_factor = self.config.rope_scaling["factor"]
|
747 |
-
if mscale_all_dim:
|
748 |
-
mscale = yarn_get_mscale(scaling_factor, mscale_all_dim)
|
749 |
-
self.softmax_scale = self.softmax_scale * mscale * mscale
|
750 |
-
|
751 |
-
def _init_rope(self):
|
752 |
-
if self.config.rope_scaling is None:
|
753 |
-
self.rotary_emb = DeepseekV2RotaryEmbedding(
|
754 |
-
self.qk_rope_head_dim,
|
755 |
-
max_position_embeddings=self.max_position_embeddings,
|
756 |
-
base=self.rope_theta,
|
757 |
-
)
|
758 |
-
else:
|
759 |
-
scaling_type = self.config.rope_scaling["type"]
|
760 |
-
scaling_factor = self.config.rope_scaling["factor"]
|
761 |
-
if scaling_type == "linear":
|
762 |
-
self.rotary_emb = DeepseekV2LinearScalingRotaryEmbedding(
|
763 |
-
self.qk_rope_head_dim,
|
764 |
-
max_position_embeddings=self.max_position_embeddings,
|
765 |
-
scaling_factor=scaling_factor,
|
766 |
-
base=self.rope_theta,
|
767 |
-
)
|
768 |
-
elif scaling_type == "dynamic":
|
769 |
-
self.rotary_emb = DeepseekV2DynamicNTKScalingRotaryEmbedding(
|
770 |
-
self.qk_rope_head_dim,
|
771 |
-
max_position_embeddings=self.max_position_embeddings,
|
772 |
-
scaling_factor=scaling_factor,
|
773 |
-
base=self.rope_theta,
|
774 |
-
)
|
775 |
-
elif scaling_type == "yarn":
|
776 |
-
kwargs = {
|
777 |
-
key: self.config.rope_scaling[key]
|
778 |
-
for key in [
|
779 |
-
"original_max_position_embeddings",
|
780 |
-
"beta_fast",
|
781 |
-
"beta_slow",
|
782 |
-
"mscale",
|
783 |
-
"mscale_all_dim",
|
784 |
-
]
|
785 |
-
if key in self.config.rope_scaling
|
786 |
-
}
|
787 |
-
self.rotary_emb = DeepseekV2YarnRotaryEmbedding(
|
788 |
-
self.qk_rope_head_dim,
|
789 |
-
max_position_embeddings=self.max_position_embeddings,
|
790 |
-
scaling_factor=scaling_factor,
|
791 |
-
base=self.rope_theta,
|
792 |
-
**kwargs,
|
793 |
-
)
|
794 |
-
else:
|
795 |
-
raise ValueError(f"Unknown RoPE scaling type {scaling_type}")
|
796 |
-
|
797 |
-
def _shape(self, tensor: torch.Tensor, seq_len: int, bsz: int):
|
798 |
-
return (
|
799 |
-
tensor.view(bsz, seq_len, self.num_heads, self.v_head_dim)
|
800 |
-
.transpose(1, 2)
|
801 |
-
.contiguous()
|
802 |
-
)
|
803 |
-
|
804 |
-
def forward(
|
805 |
-
self,
|
806 |
-
hidden_states: torch.Tensor,
|
807 |
-
attention_mask: Optional[torch.Tensor] = None,
|
808 |
-
position_ids: Optional[torch.LongTensor] = None,
|
809 |
-
past_key_value: Optional[Cache] = None,
|
810 |
-
output_attentions: bool = False,
|
811 |
-
use_cache: bool = False,
|
812 |
-
**kwargs,
|
813 |
-
) -> Tuple[torch.Tensor, Optional[torch.Tensor], Optional[Tuple[torch.Tensor]]]:
|
814 |
-
if "padding_mask" in kwargs:
|
815 |
-
warnings.warn(
|
816 |
-
"Passing `padding_mask` is deprecated and will be removed in v4.37. Please make sure use `attention_mask` instead.`"
|
817 |
-
)
|
818 |
-
bsz, q_len, _ = hidden_states.size()
|
819 |
-
|
820 |
-
if self.q_lora_rank is None:
|
821 |
-
q = self.q_proj(hidden_states)
|
822 |
-
else:
|
823 |
-
q = self.q_b_proj(self.q_a_layernorm(self.q_a_proj(hidden_states)))
|
824 |
-
q = q.view(bsz, q_len, self.num_heads, self.q_head_dim).transpose(1, 2)
|
825 |
-
q_nope, q_pe = torch.split(
|
826 |
-
q, [self.qk_nope_head_dim, self.qk_rope_head_dim], dim=-1
|
827 |
-
)
|
828 |
-
|
829 |
-
compressed_kv = self.kv_a_proj_with_mqa(hidden_states)
|
830 |
-
compressed_kv, k_pe = torch.split(
|
831 |
-
compressed_kv, [self.kv_lora_rank, self.qk_rope_head_dim], dim=-1
|
832 |
-
)
|
833 |
-
k_pe = k_pe.view(bsz, q_len, 1, self.qk_rope_head_dim).transpose(1, 2)
|
834 |
-
kv = (
|
835 |
-
self.kv_b_proj(self.kv_a_layernorm(compressed_kv))
|
836 |
-
.view(bsz, q_len, self.num_heads, self.qk_nope_head_dim + self.v_head_dim)
|
837 |
-
.transpose(1, 2)
|
838 |
-
)
|
839 |
-
|
840 |
-
k_nope, value_states = torch.split(
|
841 |
-
kv, [self.qk_nope_head_dim, self.v_head_dim], dim=-1
|
842 |
-
)
|
843 |
-
kv_seq_len = value_states.shape[-2]
|
844 |
-
if past_key_value is not None:
|
845 |
-
if self.layer_idx is None:
|
846 |
-
raise ValueError(
|
847 |
-
f"The cache structure has changed since version v4.36. If you are using {self.__class__.__name__} "
|
848 |
-
"for auto-regressive decoding with k/v caching, please make sure to initialize the attention class "
|
849 |
-
"with a layer index."
|
850 |
-
)
|
851 |
-
kv_seq_len += past_key_value.get_usable_length(kv_seq_len, self.layer_idx)
|
852 |
-
cos, sin = self.rotary_emb(value_states, seq_len=kv_seq_len)
|
853 |
-
|
854 |
-
q_pe, k_pe = apply_rotary_pos_emb(q_pe, k_pe, cos, sin, position_ids)
|
855 |
-
|
856 |
-
query_states = k_pe.new_empty(bsz, self.num_heads, q_len, self.q_head_dim)
|
857 |
-
query_states[:, :, :, : self.qk_nope_head_dim] = q_nope
|
858 |
-
query_states[:, :, :, self.qk_nope_head_dim :] = q_pe
|
859 |
-
|
860 |
-
key_states = k_pe.new_empty(bsz, self.num_heads, q_len, self.q_head_dim)
|
861 |
-
key_states[:, :, :, : self.qk_nope_head_dim] = k_nope
|
862 |
-
key_states[:, :, :, self.qk_nope_head_dim :] = k_pe
|
863 |
-
if past_key_value is not None:
|
864 |
-
cache_kwargs = {"sin": sin, "cos": cos} # Specific to RoPE models
|
865 |
-
key_states, value_states = past_key_value.update(
|
866 |
-
key_states, value_states, self.layer_idx, cache_kwargs
|
867 |
-
)
|
868 |
-
|
869 |
-
attn_weights = (
|
870 |
-
torch.matmul(query_states, key_states.transpose(2, 3)) * self.softmax_scale
|
871 |
-
)
|
872 |
-
|
873 |
-
if attn_weights.size() != (bsz, self.num_heads, q_len, kv_seq_len):
|
874 |
-
raise ValueError(
|
875 |
-
f"Attention weights should be of size {(bsz, self.num_heads, q_len, kv_seq_len)}, but is"
|
876 |
-
f" {attn_weights.size()}"
|
877 |
-
)
|
878 |
-
assert attention_mask is not None
|
879 |
-
if attention_mask is not None:
|
880 |
-
if attention_mask.size() != (bsz, 1, q_len, kv_seq_len):
|
881 |
-
raise ValueError(
|
882 |
-
f"Attention mask should be of size {(bsz, 1, q_len, kv_seq_len)}, but is {attention_mask.size()}"
|
883 |
-
)
|
884 |
-
attn_weights = attn_weights + attention_mask
|
885 |
-
|
886 |
-
# upcast attention to fp32
|
887 |
-
attn_weights = nn.functional.softmax(
|
888 |
-
attn_weights, dim=-1, dtype=torch.float32
|
889 |
-
).to(query_states.dtype)
|
890 |
-
attn_weights = nn.functional.dropout(
|
891 |
-
attn_weights, p=self.attention_dropout, training=self.training
|
892 |
-
)
|
893 |
-
attn_output = torch.matmul(attn_weights, value_states)
|
894 |
-
|
895 |
-
if attn_output.size() != (bsz, self.num_heads, q_len, self.v_head_dim):
|
896 |
-
raise ValueError(
|
897 |
-
f"`attn_output` should be of size {(bsz, self.num_heads, q_len, self.v_head_dim)}, but is"
|
898 |
-
f" {attn_output.size()}"
|
899 |
-
)
|
900 |
-
|
901 |
-
attn_output = attn_output.transpose(1, 2).contiguous()
|
902 |
-
|
903 |
-
attn_output = attn_output.reshape(bsz, q_len, self.num_heads * self.v_head_dim)
|
904 |
-
|
905 |
-
attn_output = self.o_proj(attn_output)
|
906 |
-
|
907 |
-
if not output_attentions:
|
908 |
-
attn_weights = None
|
909 |
-
|
910 |
-
return attn_output, attn_weights, past_key_value
|
911 |
-
|
912 |
-
|
913 |
-
# Copied from transformers.models.llama.modeling_llama.LlamaFlashAttention2 with Llama->DeepseekV2
|
914 |
-
class DeepseekV2FlashAttention2(DeepseekV2Attention):
|
915 |
-
"""
|
916 |
-
DeepseekV2 flash attention module. This module inherits from `DeepseekV2Attention` as the weights of the module stays
|
917 |
-
untouched. The only required change would be on the forward pass where it needs to correctly call the public API of
|
918 |
-
flash attention and deal with padding tokens in case the input contains any of them.
|
919 |
-
"""
|
920 |
-
|
921 |
-
def __init__(self, *args, **kwargs):
|
922 |
-
super().__init__(*args, **kwargs)
|
923 |
-
|
924 |
-
# TODO: Should be removed once Flash Attention for RoCm is bumped to 2.1.
|
925 |
-
# 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.
|
926 |
-
# 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).
|
927 |
-
self._flash_attn_uses_top_left_mask = not is_flash_attn_greater_or_equal_2_10()
|
928 |
-
|
929 |
-
def forward(
|
930 |
-
self,
|
931 |
-
hidden_states: torch.Tensor,
|
932 |
-
attention_mask: Optional[torch.LongTensor] = None,
|
933 |
-
position_ids: Optional[torch.LongTensor] = None,
|
934 |
-
past_key_value: Optional[Cache] = None,
|
935 |
-
output_attentions: bool = False,
|
936 |
-
use_cache: bool = False,
|
937 |
-
**kwargs,
|
938 |
-
) -> Tuple[torch.Tensor, Optional[torch.Tensor], Optional[Tuple[torch.Tensor]]]:
|
939 |
-
# DeepseekV2FlashAttention2 attention does not support output_attentions
|
940 |
-
if "padding_mask" in kwargs:
|
941 |
-
warnings.warn(
|
942 |
-
"Passing `padding_mask` is deprecated and will be removed in v4.37. Please make sure use `attention_mask` instead.`"
|
943 |
-
)
|
944 |
-
|
945 |
-
# overwrite attention_mask with padding_mask
|
946 |
-
attention_mask = kwargs.pop("padding_mask")
|
947 |
-
|
948 |
-
output_attentions = False
|
949 |
-
|
950 |
-
bsz, q_len, _ = hidden_states.size()
|
951 |
-
|
952 |
-
if self.q_lora_rank is None:
|
953 |
-
q = self.q_proj(hidden_states)
|
954 |
-
else:
|
955 |
-
q = self.q_b_proj(self.q_a_layernorm(self.q_a_proj(hidden_states)))
|
956 |
-
q = q.view(bsz, q_len, self.num_heads, self.q_head_dim).transpose(1, 2)
|
957 |
-
q_nope, q_pe = torch.split(
|
958 |
-
q, [self.qk_nope_head_dim, self.qk_rope_head_dim], dim=-1
|
959 |
-
)
|
960 |
-
|
961 |
-
# Flash attention requires the input to have the shape
|
962 |
-
# batch_size x seq_length x head_dim x hidden_dim
|
963 |
-
# therefore we just need to keep the original shape
|
964 |
-
compressed_kv = self.kv_a_proj_with_mqa(hidden_states)
|
965 |
-
compressed_kv, k_pe = torch.split(
|
966 |
-
compressed_kv, [self.kv_lora_rank, self.qk_rope_head_dim], dim=-1
|
967 |
-
)
|
968 |
-
k_pe = k_pe.view(bsz, q_len, 1, self.qk_rope_head_dim).transpose(1, 2)
|
969 |
-
kv = (
|
970 |
-
self.kv_b_proj(self.kv_a_layernorm(compressed_kv))
|
971 |
-
.view(bsz, q_len, self.num_heads, self.qk_nope_head_dim + self.v_head_dim)
|
972 |
-
.transpose(1, 2)
|
973 |
-
)
|
974 |
-
|
975 |
-
k_nope, value_states = torch.split(
|
976 |
-
kv, [self.qk_nope_head_dim, self.v_head_dim], dim=-1
|
977 |
-
)
|
978 |
-
kv_seq_len = value_states.shape[-2]
|
979 |
-
|
980 |
-
kv_seq_len = value_states.shape[-2]
|
981 |
-
if past_key_value is not None:
|
982 |
-
kv_seq_len += past_key_value.get_usable_length(kv_seq_len, self.layer_idx)
|
983 |
-
|
984 |
-
cos, sin = self.rotary_emb(value_states, seq_len=kv_seq_len)
|
985 |
-
q_pe, k_pe = apply_rotary_pos_emb(q_pe, k_pe, cos, sin, position_ids)
|
986 |
-
|
987 |
-
query_states = k_pe.new_empty(bsz, self.num_heads, q_len, self.q_head_dim)
|
988 |
-
query_states[:, :, :, : self.qk_nope_head_dim] = q_nope
|
989 |
-
query_states[:, :, :, self.qk_nope_head_dim :] = q_pe
|
990 |
-
|
991 |
-
key_states = k_pe.new_empty(bsz, self.num_heads, q_len, self.q_head_dim)
|
992 |
-
key_states[:, :, :, : self.qk_nope_head_dim] = k_nope
|
993 |
-
key_states[:, :, :, self.qk_nope_head_dim :] = k_pe
|
994 |
-
|
995 |
-
if self.q_head_dim != self.v_head_dim:
|
996 |
-
value_states = F.pad(value_states, [0, self.q_head_dim - self.v_head_dim])
|
997 |
-
|
998 |
-
if past_key_value is not None:
|
999 |
-
cache_kwargs = {"sin": sin, "cos": cos} # Specific to RoPE models
|
1000 |
-
key_states, value_states = past_key_value.update(
|
1001 |
-
key_states, value_states, self.layer_idx, cache_kwargs
|
1002 |
-
)
|
1003 |
-
|
1004 |
-
# 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
|
1005 |
-
# to be able to avoid many of these transpose/reshape/view.
|
1006 |
-
query_states = query_states.transpose(1, 2)
|
1007 |
-
key_states = key_states.transpose(1, 2)
|
1008 |
-
value_states = value_states.transpose(1, 2)
|
1009 |
-
|
1010 |
-
dropout_rate = self.attention_dropout if self.training else 0.0
|
1011 |
-
|
1012 |
-
# In PEFT, usually we cast the layer norms in float32 for training stability reasons
|
1013 |
-
# therefore the input hidden states gets silently casted in float32. Hence, we need
|
1014 |
-
# cast them back in the correct dtype just to be sure everything works as expected.
|
1015 |
-
# This might slowdown training & inference so it is recommended to not cast the LayerNorms
|
1016 |
-
# in fp32. (DeepseekV2RMSNorm handles it correctly)
|
1017 |
-
|
1018 |
-
input_dtype = query_states.dtype
|
1019 |
-
if input_dtype == torch.float32:
|
1020 |
-
# Handle the case where the model is quantized
|
1021 |
-
if hasattr(self.config, "_pre_quantization_dtype"):
|
1022 |
-
target_dtype = self.config._pre_quantization_dtype
|
1023 |
-
elif torch.is_autocast_enabled():
|
1024 |
-
target_dtype = torch.get_autocast_gpu_dtype()
|
1025 |
-
else:
|
1026 |
-
target_dtype = self.q_proj.weight.dtype if self.q_lora_rank is None else self.q_a_proj.weight.dtype
|
1027 |
-
|
1028 |
-
logger.warning_once(
|
1029 |
-
f"The input hidden states seems to be silently casted in float32, this might be related to"
|
1030 |
-
f" the fact you have upcasted embedding or layer norm layers in float32. We will cast back the input in"
|
1031 |
-
f" {target_dtype}."
|
1032 |
-
)
|
1033 |
-
|
1034 |
-
query_states = query_states.to(target_dtype)
|
1035 |
-
key_states = key_states.to(target_dtype)
|
1036 |
-
value_states = value_states.to(target_dtype)
|
1037 |
-
|
1038 |
-
attn_output = self._flash_attention_forward(
|
1039 |
-
query_states,
|
1040 |
-
key_states,
|
1041 |
-
value_states,
|
1042 |
-
attention_mask,
|
1043 |
-
q_len,
|
1044 |
-
dropout=dropout_rate,
|
1045 |
-
softmax_scale=self.softmax_scale,
|
1046 |
-
)
|
1047 |
-
if self.q_head_dim != self.v_head_dim:
|
1048 |
-
attn_output = attn_output[:, :, :, : self.v_head_dim]
|
1049 |
-
|
1050 |
-
attn_output = attn_output.reshape(
|
1051 |
-
bsz, q_len, self.num_heads * self.v_head_dim
|
1052 |
-
).contiguous()
|
1053 |
-
attn_output = self.o_proj(attn_output)
|
1054 |
-
|
1055 |
-
if not output_attentions:
|
1056 |
-
attn_weights = None
|
1057 |
-
|
1058 |
-
return attn_output, attn_weights, past_key_value
|
1059 |
-
|
1060 |
-
def _flash_attention_forward(
|
1061 |
-
self,
|
1062 |
-
query_states,
|
1063 |
-
key_states,
|
1064 |
-
value_states,
|
1065 |
-
attention_mask,
|
1066 |
-
query_length,
|
1067 |
-
dropout=0.0,
|
1068 |
-
softmax_scale=None,
|
1069 |
-
):
|
1070 |
-
"""
|
1071 |
-
Calls the forward method of Flash Attention - if the input hidden states contain at least one padding token
|
1072 |
-
first unpad the input, then computes the attention scores and pad the final attention scores.
|
1073 |
-
|
1074 |
-
Args:
|
1075 |
-
query_states (`torch.Tensor`):
|
1076 |
-
Input query states to be passed to Flash Attention API
|
1077 |
-
key_states (`torch.Tensor`):
|
1078 |
-
Input key states to be passed to Flash Attention API
|
1079 |
-
value_states (`torch.Tensor`):
|
1080 |
-
Input value states to be passed to Flash Attention API
|
1081 |
-
attention_mask (`torch.Tensor`):
|
1082 |
-
The padding mask - corresponds to a tensor of size `(batch_size, seq_len)` where 0 stands for the
|
1083 |
-
position of padding tokens and 1 for the position of non-padding tokens.
|
1084 |
-
dropout (`int`, *optional*):
|
1085 |
-
Attention dropout
|
1086 |
-
softmax_scale (`float`, *optional*):
|
1087 |
-
The scaling of QK^T before applying softmax. Default to 1 / sqrt(head_dim)
|
1088 |
-
"""
|
1089 |
-
if not self._flash_attn_uses_top_left_mask:
|
1090 |
-
causal = self.is_causal
|
1091 |
-
else:
|
1092 |
-
# TODO: Remove the `query_length != 1` check once Flash Attention for RoCm is bumped to 2.1. For details, please see the comment in DeepseekV2FlashAttention2 __init__.
|
1093 |
-
causal = self.is_causal and query_length != 1
|
1094 |
-
|
1095 |
-
# Contains at least one padding token in the sequence
|
1096 |
-
if attention_mask is not None:
|
1097 |
-
batch_size = query_states.shape[0]
|
1098 |
-
(
|
1099 |
-
query_states,
|
1100 |
-
key_states,
|
1101 |
-
value_states,
|
1102 |
-
indices_q,
|
1103 |
-
cu_seq_lens,
|
1104 |
-
max_seq_lens,
|
1105 |
-
) = self._upad_input(
|
1106 |
-
query_states, key_states, value_states, attention_mask, query_length
|
1107 |
-
)
|
1108 |
-
|
1109 |
-
cu_seqlens_q, cu_seqlens_k = cu_seq_lens
|
1110 |
-
max_seqlen_in_batch_q, max_seqlen_in_batch_k = max_seq_lens
|
1111 |
-
|
1112 |
-
attn_output_unpad = flash_attn_varlen_func(
|
1113 |
-
query_states,
|
1114 |
-
key_states,
|
1115 |
-
value_states,
|
1116 |
-
cu_seqlens_q=cu_seqlens_q,
|
1117 |
-
cu_seqlens_k=cu_seqlens_k,
|
1118 |
-
max_seqlen_q=max_seqlen_in_batch_q,
|
1119 |
-
max_seqlen_k=max_seqlen_in_batch_k,
|
1120 |
-
dropout_p=dropout,
|
1121 |
-
softmax_scale=softmax_scale,
|
1122 |
-
causal=causal,
|
1123 |
-
)
|
1124 |
-
|
1125 |
-
attn_output = pad_input(
|
1126 |
-
attn_output_unpad, indices_q, batch_size, query_length
|
1127 |
-
)
|
1128 |
-
else:
|
1129 |
-
attn_output = flash_attn_func(
|
1130 |
-
query_states,
|
1131 |
-
key_states,
|
1132 |
-
value_states,
|
1133 |
-
dropout,
|
1134 |
-
softmax_scale=softmax_scale,
|
1135 |
-
causal=causal,
|
1136 |
-
)
|
1137 |
-
|
1138 |
-
return attn_output
|
1139 |
-
|
1140 |
-
def _upad_input(
|
1141 |
-
self, query_layer, key_layer, value_layer, attention_mask, query_length
|
1142 |
-
):
|
1143 |
-
indices_k, cu_seqlens_k, max_seqlen_in_batch_k = _get_unpad_data(attention_mask)
|
1144 |
-
batch_size, kv_seq_len, num_key_value_heads, head_dim = key_layer.shape
|
1145 |
-
|
1146 |
-
key_layer = index_first_axis(
|
1147 |
-
key_layer.reshape(batch_size * kv_seq_len, num_key_value_heads, head_dim),
|
1148 |
-
indices_k,
|
1149 |
-
)
|
1150 |
-
value_layer = index_first_axis(
|
1151 |
-
value_layer.reshape(batch_size * kv_seq_len, num_key_value_heads, head_dim),
|
1152 |
-
indices_k,
|
1153 |
-
)
|
1154 |
-
if query_length == kv_seq_len:
|
1155 |
-
query_layer = index_first_axis(
|
1156 |
-
query_layer.reshape(batch_size * kv_seq_len, self.num_heads, head_dim),
|
1157 |
-
indices_k,
|
1158 |
-
)
|
1159 |
-
cu_seqlens_q = cu_seqlens_k
|
1160 |
-
max_seqlen_in_batch_q = max_seqlen_in_batch_k
|
1161 |
-
indices_q = indices_k
|
1162 |
-
elif query_length == 1:
|
1163 |
-
max_seqlen_in_batch_q = 1
|
1164 |
-
cu_seqlens_q = torch.arange(
|
1165 |
-
batch_size + 1, dtype=torch.int32, device=query_layer.device
|
1166 |
-
) # There is a memcpy here, that is very bad.
|
1167 |
-
indices_q = cu_seqlens_q[:-1]
|
1168 |
-
query_layer = query_layer.squeeze(1)
|
1169 |
-
else:
|
1170 |
-
# The -q_len: slice assumes left padding.
|
1171 |
-
attention_mask = attention_mask[:, -query_length:]
|
1172 |
-
query_layer, indices_q, cu_seqlens_q, max_seqlen_in_batch_q = unpad_input(
|
1173 |
-
query_layer, attention_mask
|
1174 |
-
)
|
1175 |
-
|
1176 |
-
return (
|
1177 |
-
query_layer,
|
1178 |
-
key_layer,
|
1179 |
-
value_layer,
|
1180 |
-
indices_q,
|
1181 |
-
(cu_seqlens_q, cu_seqlens_k),
|
1182 |
-
(max_seqlen_in_batch_q, max_seqlen_in_batch_k),
|
1183 |
-
)
|
1184 |
-
|
1185 |
-
|
1186 |
-
ATTENTION_CLASSES = {
|
1187 |
-
"eager": DeepseekV2Attention,
|
1188 |
-
"flash_attention_2": DeepseekV2FlashAttention2,
|
1189 |
-
}
|
1190 |
-
|
1191 |
-
|
1192 |
-
class DeepseekV2DecoderLayer(nn.Module):
|
1193 |
-
def __init__(self, config: DeepseekV2Config, layer_idx: int):
|
1194 |
-
super().__init__()
|
1195 |
-
self.hidden_size = config.hidden_size
|
1196 |
-
|
1197 |
-
self.self_attn = ATTENTION_CLASSES[config._attn_implementation](
|
1198 |
-
config=config, layer_idx=layer_idx
|
1199 |
-
)
|
1200 |
-
|
1201 |
-
self.mlp = (
|
1202 |
-
DeepseekV2MoE(config)
|
1203 |
-
if (
|
1204 |
-
config.n_routed_experts is not None
|
1205 |
-
and layer_idx >= config.first_k_dense_replace
|
1206 |
-
and layer_idx % config.moe_layer_freq == 0
|
1207 |
-
)
|
1208 |
-
else DeepseekV2MLP(config)
|
1209 |
-
)
|
1210 |
-
self.input_layernorm = DeepseekV2RMSNorm(
|
1211 |
-
config.hidden_size, eps=config.rms_norm_eps
|
1212 |
-
)
|
1213 |
-
self.post_attention_layernorm = DeepseekV2RMSNorm(
|
1214 |
-
config.hidden_size, eps=config.rms_norm_eps
|
1215 |
-
)
|
1216 |
-
|
1217 |
-
def forward(
|
1218 |
-
self,
|
1219 |
-
hidden_states: torch.Tensor,
|
1220 |
-
attention_mask: Optional[torch.Tensor] = None,
|
1221 |
-
position_ids: Optional[torch.LongTensor] = None,
|
1222 |
-
past_key_value: Optional[Tuple[torch.Tensor]] = None,
|
1223 |
-
output_attentions: Optional[bool] = False,
|
1224 |
-
use_cache: Optional[bool] = False,
|
1225 |
-
**kwargs,
|
1226 |
-
) -> Tuple[
|
1227 |
-
torch.FloatTensor, Optional[Tuple[torch.FloatTensor, torch.FloatTensor]]
|
1228 |
-
]:
|
1229 |
-
"""
|
1230 |
-
Args:
|
1231 |
-
hidden_states (`torch.FloatTensor`): input to the layer of shape `(batch, seq_len, embed_dim)`
|
1232 |
-
attention_mask (`torch.FloatTensor`, *optional*):
|
1233 |
-
attention mask of size `(batch_size, sequence_length)` if flash attention is used or `(batch_size, 1,
|
1234 |
-
query_sequence_length, key_sequence_length)` if default attention is used.
|
1235 |
-
output_attentions (`bool`, *optional*):
|
1236 |
-
Whether or not to return the attentions tensors of all attention layers. See `attentions` under
|
1237 |
-
returned tensors for more detail.
|
1238 |
-
use_cache (`bool`, *optional*):
|
1239 |
-
If set to `True`, `past_key_values` key value states are returned and can be used to speed up decoding
|
1240 |
-
(see `past_key_values`).
|
1241 |
-
past_key_value (`Tuple(torch.FloatTensor)`, *optional*): cached past key and value projection states
|
1242 |
-
"""
|
1243 |
-
if "padding_mask" in kwargs:
|
1244 |
-
warnings.warn(
|
1245 |
-
"Passing `padding_mask` is deprecated and will be removed in v4.37. Please make sure use `attention_mask` instead.`"
|
1246 |
-
)
|
1247 |
-
residual = hidden_states
|
1248 |
-
|
1249 |
-
hidden_states = self.input_layernorm(hidden_states)
|
1250 |
-
|
1251 |
-
# Self Attention
|
1252 |
-
hidden_states, self_attn_weights, present_key_value = self.self_attn(
|
1253 |
-
hidden_states=hidden_states,
|
1254 |
-
attention_mask=attention_mask,
|
1255 |
-
position_ids=position_ids,
|
1256 |
-
past_key_value=past_key_value,
|
1257 |
-
output_attentions=output_attentions,
|
1258 |
-
use_cache=use_cache,
|
1259 |
-
**kwargs,
|
1260 |
-
)
|
1261 |
-
hidden_states = residual + hidden_states
|
1262 |
-
|
1263 |
-
# Fully Connected
|
1264 |
-
residual = hidden_states
|
1265 |
-
hidden_states = self.post_attention_layernorm(hidden_states)
|
1266 |
-
hidden_states = self.mlp(hidden_states)
|
1267 |
-
hidden_states = residual + hidden_states
|
1268 |
-
|
1269 |
-
outputs = (hidden_states,)
|
1270 |
-
|
1271 |
-
if output_attentions:
|
1272 |
-
outputs += (self_attn_weights,)
|
1273 |
-
|
1274 |
-
if use_cache:
|
1275 |
-
outputs += (present_key_value,)
|
1276 |
-
|
1277 |
-
return outputs
|
1278 |
-
|
1279 |
-
|
1280 |
-
DeepseekV2_START_DOCSTRING = r"""
|
1281 |
-
This model inherits from [`PreTrainedModel`]. Check the superclass documentation for the generic methods the
|
1282 |
-
library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads
|
1283 |
-
etc.)
|
1284 |
-
|
1285 |
-
This model is also a PyTorch [torch.nn.Module](https://pytorch.org/docs/stable/nn.html#torch.nn.Module) subclass.
|
1286 |
-
Use it as a regular PyTorch Module and refer to the PyTorch documentation for all matter related to general usage
|
1287 |
-
and behavior.
|
1288 |
-
|
1289 |
-
Parameters:
|
1290 |
-
config ([`DeepseekV2Config`]):
|
1291 |
-
Model configuration class with all the parameters of the model. Initializing with a config file does not
|
1292 |
-
load the weights associated with the model, only the configuration. Check out the
|
1293 |
-
[`~PreTrainedModel.from_pretrained`] method to load the model weights.
|
1294 |
-
"""
|
1295 |
-
|
1296 |
-
|
1297 |
-
@add_start_docstrings(
|
1298 |
-
"The bare DeepseekV2 Model outputting raw hidden-states without any specific head on top.",
|
1299 |
-
DeepseekV2_START_DOCSTRING,
|
1300 |
-
)
|
1301 |
-
class DeepseekV2PreTrainedModel(PreTrainedModel):
|
1302 |
-
config_class = DeepseekV2Config
|
1303 |
-
base_model_prefix = "model"
|
1304 |
-
supports_gradient_checkpointing = True
|
1305 |
-
_no_split_modules = ["DeepseekV2DecoderLayer"]
|
1306 |
-
_skip_keys_device_placement = "past_key_values"
|
1307 |
-
_supports_flash_attn_2 = True
|
1308 |
-
_supports_cache_class = True
|
1309 |
-
|
1310 |
-
def _init_weights(self, module):
|
1311 |
-
std = self.config.initializer_range
|
1312 |
-
if isinstance(module, nn.Linear):
|
1313 |
-
module.weight.data.normal_(mean=0.0, std=std)
|
1314 |
-
if module.bias is not None:
|
1315 |
-
module.bias.data.zero_()
|
1316 |
-
elif isinstance(module, nn.Embedding):
|
1317 |
-
module.weight.data.normal_(mean=0.0, std=std)
|
1318 |
-
if module.padding_idx is not None:
|
1319 |
-
module.weight.data[module.padding_idx].zero_()
|
1320 |
-
|
1321 |
-
|
1322 |
-
DeepseekV2_INPUTS_DOCSTRING = r"""
|
1323 |
-
Args:
|
1324 |
-
input_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`):
|
1325 |
-
Indices of input sequence tokens in the vocabulary. Padding will be ignored by default should you provide
|
1326 |
-
it.
|
1327 |
-
|
1328 |
-
Indices can be obtained using [`AutoTokenizer`]. See [`PreTrainedTokenizer.encode`] and
|
1329 |
-
[`PreTrainedTokenizer.__call__`] for details.
|
1330 |
-
|
1331 |
-
[What are input IDs?](../glossary#input-ids)
|
1332 |
-
attention_mask (`torch.Tensor` of shape `(batch_size, sequence_length)`, *optional*):
|
1333 |
-
Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:
|
1334 |
-
|
1335 |
-
- 1 for tokens that are **not masked**,
|
1336 |
-
- 0 for tokens that are **masked**.
|
1337 |
-
|
1338 |
-
[What are attention masks?](../glossary#attention-mask)
|
1339 |
-
|
1340 |
-
Indices can be obtained using [`AutoTokenizer`]. See [`PreTrainedTokenizer.encode`] and
|
1341 |
-
[`PreTrainedTokenizer.__call__`] for details.
|
1342 |
-
|
1343 |
-
If `past_key_values` is used, optionally only the last `input_ids` have to be input (see
|
1344 |
-
`past_key_values`).
|
1345 |
-
|
1346 |
-
If you want to change padding behavior, you should read [`modeling_opt._prepare_decoder_attention_mask`]
|
1347 |
-
and modify to your needs. See diagram 1 in [the paper](https://arxiv.org/abs/1910.13461) for more
|
1348 |
-
information on the default strategy.
|
1349 |
-
|
1350 |
-
- 1 indicates the head is **not masked**,
|
1351 |
-
- 0 indicates the head is **masked**.
|
1352 |
-
position_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`, *optional*):
|
1353 |
-
Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0,
|
1354 |
-
config.n_positions - 1]`.
|
1355 |
-
|
1356 |
-
[What are position IDs?](../glossary#position-ids)
|
1357 |
-
past_key_values (`Cache` or `tuple(tuple(torch.FloatTensor))`, *optional*):
|
1358 |
-
Pre-computed hidden-states (key and values in the self-attention blocks and in the cross-attention
|
1359 |
-
blocks) that can be used to speed up sequential decoding. This typically consists in the `past_key_values`
|
1360 |
-
returned by the model at a previous stage of decoding, when `use_cache=True` or `config.use_cache=True`.
|
1361 |
-
|
1362 |
-
Two formats are allowed:
|
1363 |
-
- a [`~cache_utils.Cache`] instance;
|
1364 |
-
- Tuple of `tuple(torch.FloatTensor)` of length `config.n_layers`, with each tuple having 2 tensors of
|
1365 |
-
shape `(batch_size, num_heads, sequence_length, embed_size_per_head)`). This is also known as the legacy
|
1366 |
-
cache format.
|
1367 |
-
|
1368 |
-
The model will output the same cache format that is fed as input. If no `past_key_values` are passed, the
|
1369 |
-
legacy cache format will be returned.
|
1370 |
-
|
1371 |
-
If `past_key_values` are used, the user can optionally input only the last `input_ids` (those that don't
|
1372 |
-
have their past key value states given to this model) of shape `(batch_size, 1)` instead of all `input_ids`
|
1373 |
-
of shape `(batch_size, sequence_length)`.
|
1374 |
-
inputs_embeds (`torch.FloatTensor` of shape `(batch_size, sequence_length, hidden_size)`, *optional*):
|
1375 |
-
Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This
|
1376 |
-
is useful if you want more control over how to convert `input_ids` indices into associated vectors than the
|
1377 |
-
model's internal embedding lookup matrix.
|
1378 |
-
use_cache (`bool`, *optional*):
|
1379 |
-
If set to `True`, `past_key_values` key value states are returned and can be used to speed up decoding (see
|
1380 |
-
`past_key_values`).
|
1381 |
-
output_attentions (`bool`, *optional*):
|
1382 |
-
Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned
|
1383 |
-
tensors for more detail.
|
1384 |
-
output_hidden_states (`bool`, *optional*):
|
1385 |
-
Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for
|
1386 |
-
more detail.
|
1387 |
-
return_dict (`bool`, *optional*):
|
1388 |
-
Whether or not to return a [`~utils.ModelOutput`] instead of a plain tuple.
|
1389 |
-
"""
|
1390 |
-
|
1391 |
-
|
1392 |
-
@add_start_docstrings(
|
1393 |
-
"The bare DeepseekV2 Model outputting raw hidden-states without any specific head on top.",
|
1394 |
-
DeepseekV2_START_DOCSTRING,
|
1395 |
-
)
|
1396 |
-
class DeepseekV2Model(DeepseekV2PreTrainedModel):
|
1397 |
-
"""
|
1398 |
-
Transformer decoder consisting of *config.num_hidden_layers* layers. Each layer is a [`DeepseekV2DecoderLayer`]
|
1399 |
-
|
1400 |
-
Args:
|
1401 |
-
config: DeepseekV2Config
|
1402 |
-
"""
|
1403 |
-
|
1404 |
-
def __init__(self, config: DeepseekV2Config):
|
1405 |
-
super().__init__(config)
|
1406 |
-
self.padding_idx = config.pad_token_id
|
1407 |
-
self.vocab_size = config.vocab_size
|
1408 |
-
|
1409 |
-
self.embed_tokens = nn.Embedding(
|
1410 |
-
config.vocab_size, config.hidden_size, self.padding_idx
|
1411 |
-
)
|
1412 |
-
self.layers = nn.ModuleList(
|
1413 |
-
[
|
1414 |
-
DeepseekV2DecoderLayer(config, layer_idx)
|
1415 |
-
for layer_idx in range(config.num_hidden_layers)
|
1416 |
-
]
|
1417 |
-
)
|
1418 |
-
self._use_flash_attention_2 = config._attn_implementation == "flash_attention_2"
|
1419 |
-
self.norm = DeepseekV2RMSNorm(config.hidden_size, eps=config.rms_norm_eps)
|
1420 |
-
|
1421 |
-
self.gradient_checkpointing = False
|
1422 |
-
# Initialize weights and apply final processing
|
1423 |
-
self.post_init()
|
1424 |
-
|
1425 |
-
def get_input_embeddings(self):
|
1426 |
-
return self.embed_tokens
|
1427 |
-
|
1428 |
-
def set_input_embeddings(self, value):
|
1429 |
-
self.embed_tokens = value
|
1430 |
-
|
1431 |
-
@add_start_docstrings_to_model_forward(DeepseekV2_INPUTS_DOCSTRING)
|
1432 |
-
def forward(
|
1433 |
-
self,
|
1434 |
-
input_ids: torch.LongTensor = None,
|
1435 |
-
attention_mask: Optional[torch.Tensor] = None,
|
1436 |
-
position_ids: Optional[torch.LongTensor] = None,
|
1437 |
-
past_key_values: Optional[List[torch.FloatTensor]] = None,
|
1438 |
-
inputs_embeds: Optional[torch.FloatTensor] = None,
|
1439 |
-
use_cache: Optional[bool] = None,
|
1440 |
-
output_attentions: Optional[bool] = None,
|
1441 |
-
output_hidden_states: Optional[bool] = None,
|
1442 |
-
return_dict: Optional[bool] = None,
|
1443 |
-
) -> Union[Tuple, BaseModelOutputWithPast]:
|
1444 |
-
output_attentions = (
|
1445 |
-
output_attentions
|
1446 |
-
if output_attentions is not None
|
1447 |
-
else self.config.output_attentions
|
1448 |
-
)
|
1449 |
-
output_hidden_states = (
|
1450 |
-
output_hidden_states
|
1451 |
-
if output_hidden_states is not None
|
1452 |
-
else self.config.output_hidden_states
|
1453 |
-
)
|
1454 |
-
use_cache = use_cache if use_cache is not None else self.config.use_cache
|
1455 |
-
|
1456 |
-
return_dict = (
|
1457 |
-
return_dict if return_dict is not None else self.config.use_return_dict
|
1458 |
-
)
|
1459 |
-
|
1460 |
-
# retrieve input_ids and inputs_embeds
|
1461 |
-
if input_ids is not None and inputs_embeds is not None:
|
1462 |
-
raise ValueError(
|
1463 |
-
"You cannot specify both input_ids and inputs_embeds at the same time"
|
1464 |
-
)
|
1465 |
-
elif input_ids is not None:
|
1466 |
-
batch_size, seq_length = input_ids.shape[:2]
|
1467 |
-
elif inputs_embeds is not None:
|
1468 |
-
batch_size, seq_length = inputs_embeds.shape[:2]
|
1469 |
-
else:
|
1470 |
-
raise ValueError("You have to specify either input_ids or inputs_embeds")
|
1471 |
-
|
1472 |
-
if self.gradient_checkpointing and self.training:
|
1473 |
-
if use_cache:
|
1474 |
-
logger.warning_once(
|
1475 |
-
"`use_cache=True` is incompatible with gradient checkpointing. Setting `use_cache=False`transformers."
|
1476 |
-
)
|
1477 |
-
use_cache = False
|
1478 |
-
|
1479 |
-
past_key_values_length = 0
|
1480 |
-
if use_cache:
|
1481 |
-
use_legacy_cache = not isinstance(past_key_values, Cache)
|
1482 |
-
if use_legacy_cache:
|
1483 |
-
past_key_values = DynamicCache.from_legacy_cache(past_key_values)
|
1484 |
-
past_key_values_length = past_key_values.get_usable_length(seq_length)
|
1485 |
-
|
1486 |
-
if position_ids is None:
|
1487 |
-
device = input_ids.device if input_ids is not None else inputs_embeds.device
|
1488 |
-
position_ids = torch.arange(
|
1489 |
-
past_key_values_length,
|
1490 |
-
seq_length + past_key_values_length,
|
1491 |
-
dtype=torch.long,
|
1492 |
-
device=device,
|
1493 |
-
)
|
1494 |
-
position_ids = position_ids.unsqueeze(0)
|
1495 |
-
|
1496 |
-
if inputs_embeds is None:
|
1497 |
-
inputs_embeds = self.embed_tokens(input_ids)
|
1498 |
-
|
1499 |
-
if self._use_flash_attention_2:
|
1500 |
-
# 2d mask is passed through the layers
|
1501 |
-
attention_mask = (
|
1502 |
-
attention_mask
|
1503 |
-
if (attention_mask is not None and 0 in attention_mask)
|
1504 |
-
else None
|
1505 |
-
)
|
1506 |
-
else:
|
1507 |
-
# 4d mask is passed through the layers
|
1508 |
-
attention_mask = _prepare_4d_causal_attention_mask(
|
1509 |
-
attention_mask,
|
1510 |
-
(batch_size, seq_length),
|
1511 |
-
inputs_embeds,
|
1512 |
-
past_key_values_length,
|
1513 |
-
)
|
1514 |
-
|
1515 |
-
# embed positions
|
1516 |
-
hidden_states = inputs_embeds
|
1517 |
-
|
1518 |
-
# decoder layers
|
1519 |
-
all_hidden_states = () if output_hidden_states else None
|
1520 |
-
all_self_attns = () if output_attentions else None
|
1521 |
-
next_decoder_cache = None
|
1522 |
-
|
1523 |
-
for decoder_layer in self.layers:
|
1524 |
-
if output_hidden_states:
|
1525 |
-
all_hidden_states += (hidden_states,)
|
1526 |
-
|
1527 |
-
if self.gradient_checkpointing and self.training:
|
1528 |
-
layer_outputs = self._gradient_checkpointing_func(
|
1529 |
-
decoder_layer.__call__,
|
1530 |
-
hidden_states,
|
1531 |
-
attention_mask,
|
1532 |
-
position_ids,
|
1533 |
-
past_key_values,
|
1534 |
-
output_attentions,
|
1535 |
-
use_cache,
|
1536 |
-
)
|
1537 |
-
else:
|
1538 |
-
layer_outputs = decoder_layer(
|
1539 |
-
hidden_states,
|
1540 |
-
attention_mask=attention_mask,
|
1541 |
-
position_ids=position_ids,
|
1542 |
-
past_key_value=past_key_values,
|
1543 |
-
output_attentions=output_attentions,
|
1544 |
-
use_cache=use_cache,
|
1545 |
-
)
|
1546 |
-
|
1547 |
-
hidden_states = layer_outputs[0]
|
1548 |
-
|
1549 |
-
if use_cache:
|
1550 |
-
next_decoder_cache = layer_outputs[2 if output_attentions else 1]
|
1551 |
-
|
1552 |
-
if output_attentions:
|
1553 |
-
all_self_attns += (layer_outputs[1],)
|
1554 |
-
|
1555 |
-
hidden_states = self.norm(hidden_states)
|
1556 |
-
|
1557 |
-
# add hidden states from the last decoder layer
|
1558 |
-
if output_hidden_states:
|
1559 |
-
all_hidden_states += (hidden_states,)
|
1560 |
-
|
1561 |
-
next_cache = None
|
1562 |
-
if use_cache:
|
1563 |
-
next_cache = (
|
1564 |
-
next_decoder_cache.to_legacy_cache()
|
1565 |
-
if use_legacy_cache
|
1566 |
-
else next_decoder_cache
|
1567 |
-
)
|
1568 |
-
if not return_dict:
|
1569 |
-
return tuple(
|
1570 |
-
v
|
1571 |
-
for v in [hidden_states, next_cache, all_hidden_states, all_self_attns]
|
1572 |
-
if v is not None
|
1573 |
-
)
|
1574 |
-
return BaseModelOutputWithPast(
|
1575 |
-
last_hidden_state=hidden_states,
|
1576 |
-
past_key_values=next_cache,
|
1577 |
-
hidden_states=all_hidden_states,
|
1578 |
-
attentions=all_self_attns,
|
1579 |
-
)
|
1580 |
-
|
1581 |
-
|
1582 |
-
class DeepseekV2ForCausalLM(DeepseekV2PreTrainedModel):
|
1583 |
-
_tied_weights_keys = ["lm_head.weight"]
|
1584 |
-
|
1585 |
-
def __init__(self, config):
|
1586 |
-
super().__init__(config)
|
1587 |
-
self.model = DeepseekV2Model(config)
|
1588 |
-
self.vocab_size = config.vocab_size
|
1589 |
-
self.lm_head = nn.Linear(config.hidden_size, config.vocab_size, bias=False)
|
1590 |
-
|
1591 |
-
# Initialize weights and apply final processing
|
1592 |
-
self.post_init()
|
1593 |
-
|
1594 |
-
def get_input_embeddings(self):
|
1595 |
-
return self.model.embed_tokens
|
1596 |
-
|
1597 |
-
def set_input_embeddings(self, value):
|
1598 |
-
self.model.embed_tokens = value
|
1599 |
-
|
1600 |
-
def get_output_embeddings(self):
|
1601 |
-
return self.lm_head
|
1602 |
-
|
1603 |
-
def set_output_embeddings(self, new_embeddings):
|
1604 |
-
self.lm_head = new_embeddings
|
1605 |
-
|
1606 |
-
def set_decoder(self, decoder):
|
1607 |
-
self.model = decoder
|
1608 |
-
|
1609 |
-
def get_decoder(self):
|
1610 |
-
return self.model
|
1611 |
-
|
1612 |
-
@add_start_docstrings_to_model_forward(DeepseekV2_INPUTS_DOCSTRING)
|
1613 |
-
@replace_return_docstrings(
|
1614 |
-
output_type=CausalLMOutputWithPast, config_class=_CONFIG_FOR_DOC
|
1615 |
-
)
|
1616 |
-
def forward(
|
1617 |
-
self,
|
1618 |
-
input_ids: torch.LongTensor = None,
|
1619 |
-
attention_mask: Optional[torch.Tensor] = None,
|
1620 |
-
position_ids: Optional[torch.LongTensor] = None,
|
1621 |
-
past_key_values: Optional[List[torch.FloatTensor]] = None,
|
1622 |
-
inputs_embeds: Optional[torch.FloatTensor] = None,
|
1623 |
-
labels: Optional[torch.LongTensor] = None,
|
1624 |
-
use_cache: Optional[bool] = None,
|
1625 |
-
output_attentions: Optional[bool] = None,
|
1626 |
-
output_hidden_states: Optional[bool] = None,
|
1627 |
-
return_dict: Optional[bool] = None,
|
1628 |
-
) -> Union[Tuple, CausalLMOutputWithPast]:
|
1629 |
-
r"""
|
1630 |
-
Args:
|
1631 |
-
labels (`torch.LongTensor` of shape `(batch_size, sequence_length)`, *optional*):
|
1632 |
-
Labels for computing the masked language modeling loss. Indices should either be in `[0, transformers.,
|
1633 |
-
config.vocab_size]` or -100 (see `input_ids` docstring). Tokens with indices set to `-100` are ignored
|
1634 |
-
(masked), the loss is only computed for the tokens with labels in `[0, transformers., config.vocab_size]`.
|
1635 |
-
|
1636 |
-
Returns:
|
1637 |
-
|
1638 |
-
Example:
|
1639 |
-
|
1640 |
-
```python
|
1641 |
-
>>> from transformers import AutoTokenizer, DeepseekV2ForCausalLM
|
1642 |
-
|
1643 |
-
>>> model = DeepseekV2ForCausalLM.from_pretrained(PATH_TO_CONVERTED_WEIGHTS)
|
1644 |
-
>>> tokenizer = AutoTokenizer.from_pretrained(PATH_TO_CONVERTED_TOKENIZER)
|
1645 |
-
|
1646 |
-
>>> prompt = "Hey, are you conscious? Can you talk to me?"
|
1647 |
-
>>> inputs = tokenizer(prompt, return_tensors="pt")
|
1648 |
-
|
1649 |
-
>>> # Generate
|
1650 |
-
>>> generate_ids = model.generate(inputs.input_ids, max_length=30)
|
1651 |
-
>>> tokenizer.batch_decode(generate_ids, skip_special_tokens=True, clean_up_tokenization_spaces=False)[0]
|
1652 |
-
"Hey, are you conscious? Can you talk to me?\nI'm not conscious, but I can talk to you."
|
1653 |
-
```"""
|
1654 |
-
output_attentions = (
|
1655 |
-
output_attentions
|
1656 |
-
if output_attentions is not None
|
1657 |
-
else self.config.output_attentions
|
1658 |
-
)
|
1659 |
-
output_hidden_states = (
|
1660 |
-
output_hidden_states
|
1661 |
-
if output_hidden_states is not None
|
1662 |
-
else self.config.output_hidden_states
|
1663 |
-
)
|
1664 |
-
return_dict = (
|
1665 |
-
return_dict if return_dict is not None else self.config.use_return_dict
|
1666 |
-
)
|
1667 |
-
|
1668 |
-
# decoder outputs consists of (dec_features, layer_state, dec_hidden, dec_attn)
|
1669 |
-
outputs = self.model(
|
1670 |
-
input_ids=input_ids,
|
1671 |
-
attention_mask=attention_mask,
|
1672 |
-
position_ids=position_ids,
|
1673 |
-
past_key_values=past_key_values,
|
1674 |
-
inputs_embeds=inputs_embeds,
|
1675 |
-
use_cache=use_cache,
|
1676 |
-
output_attentions=output_attentions,
|
1677 |
-
output_hidden_states=output_hidden_states,
|
1678 |
-
return_dict=return_dict,
|
1679 |
-
)
|
1680 |
-
|
1681 |
-
hidden_states = outputs[0]
|
1682 |
-
logits = self.lm_head(hidden_states)
|
1683 |
-
logits = logits.float()
|
1684 |
-
|
1685 |
-
loss = None
|
1686 |
-
if labels is not None:
|
1687 |
-
# Shift so that tokens < n predict n
|
1688 |
-
shift_logits = logits[..., :-1, :].contiguous()
|
1689 |
-
shift_labels = labels[..., 1:].contiguous()
|
1690 |
-
# Flatten the tokens
|
1691 |
-
loss_fct = CrossEntropyLoss()
|
1692 |
-
shift_logits = shift_logits.view(-1, self.config.vocab_size)
|
1693 |
-
shift_labels = shift_labels.view(-1)
|
1694 |
-
# Enable model parallelism
|
1695 |
-
shift_labels = shift_labels.to(shift_logits.device)
|
1696 |
-
loss = loss_fct(shift_logits, shift_labels)
|
1697 |
-
|
1698 |
-
if not return_dict:
|
1699 |
-
output = (logits,) + outputs[1:]
|
1700 |
-
return (loss,) + output if loss is not None else output
|
1701 |
-
|
1702 |
-
return CausalLMOutputWithPast(
|
1703 |
-
loss=loss,
|
1704 |
-
logits=logits,
|
1705 |
-
past_key_values=outputs.past_key_values,
|
1706 |
-
hidden_states=outputs.hidden_states,
|
1707 |
-
attentions=outputs.attentions,
|
1708 |
-
)
|
1709 |
-
|
1710 |
-
def prepare_inputs_for_generation(
|
1711 |
-
self,
|
1712 |
-
input_ids,
|
1713 |
-
past_key_values=None,
|
1714 |
-
attention_mask=None,
|
1715 |
-
inputs_embeds=None,
|
1716 |
-
**kwargs,
|
1717 |
-
):
|
1718 |
-
if past_key_values is not None:
|
1719 |
-
if isinstance(past_key_values, Cache):
|
1720 |
-
cache_length = past_key_values.get_seq_length()
|
1721 |
-
past_length = past_key_values.seen_tokens
|
1722 |
-
max_cache_length = past_key_values.get_max_length()
|
1723 |
-
else:
|
1724 |
-
cache_length = past_length = past_key_values[0][0].shape[2]
|
1725 |
-
max_cache_length = None
|
1726 |
-
|
1727 |
-
# Keep only the unprocessed tokens:
|
1728 |
-
# 1 - If the length of the attention_mask exceeds the length of input_ids, then we are in a setting where
|
1729 |
-
# some of the inputs are exclusivelly passed as part of the cache (e.g. when passing input_embeds as
|
1730 |
-
# input)
|
1731 |
-
if (
|
1732 |
-
attention_mask is not None
|
1733 |
-
and attention_mask.shape[1] > input_ids.shape[1]
|
1734 |
-
):
|
1735 |
-
input_ids = input_ids[:, -(attention_mask.shape[1] - past_length) :]
|
1736 |
-
# 2 - If the past_length is smaller than input_ids', then input_ids holds all input tokens. We can discard
|
1737 |
-
# input_ids based on the past_length.
|
1738 |
-
elif past_length < input_ids.shape[1]:
|
1739 |
-
input_ids = input_ids[:, past_length:]
|
1740 |
-
# 3 - Otherwise (past_length >= input_ids.shape[1]), let's assume input_ids only has unprocessed tokens.
|
1741 |
-
|
1742 |
-
# If we are about to go beyond the maximum cache length, we need to crop the input attention mask.
|
1743 |
-
if (
|
1744 |
-
max_cache_length is not None
|
1745 |
-
and attention_mask is not None
|
1746 |
-
and cache_length + input_ids.shape[1] > max_cache_length
|
1747 |
-
):
|
1748 |
-
attention_mask = attention_mask[:, -max_cache_length:]
|
1749 |
-
|
1750 |
-
position_ids = kwargs.get("position_ids", None)
|
1751 |
-
if attention_mask is not None and position_ids is None:
|
1752 |
-
# create position_ids on the fly for batch generation
|
1753 |
-
position_ids = attention_mask.long().cumsum(-1) - 1
|
1754 |
-
position_ids.masked_fill_(attention_mask == 0, 1)
|
1755 |
-
if past_key_values:
|
1756 |
-
position_ids = position_ids[:, -input_ids.shape[1] :]
|
1757 |
-
|
1758 |
-
# if `inputs_embeds` are passed, we only want to use them in the 1st generation step
|
1759 |
-
if inputs_embeds is not None and past_key_values is None:
|
1760 |
-
model_inputs = {"inputs_embeds": inputs_embeds}
|
1761 |
-
else:
|
1762 |
-
model_inputs = {"input_ids": input_ids}
|
1763 |
-
|
1764 |
-
model_inputs.update(
|
1765 |
-
{
|
1766 |
-
"position_ids": position_ids,
|
1767 |
-
"past_key_values": past_key_values,
|
1768 |
-
"use_cache": kwargs.get("use_cache"),
|
1769 |
-
"attention_mask": attention_mask,
|
1770 |
-
}
|
1771 |
-
)
|
1772 |
-
return model_inputs
|
1773 |
-
|
1774 |
-
@staticmethod
|
1775 |
-
def _reorder_cache(past_key_values, beam_idx):
|
1776 |
-
reordered_past = ()
|
1777 |
-
for layer_past in past_key_values:
|
1778 |
-
reordered_past += (
|
1779 |
-
tuple(
|
1780 |
-
past_state.index_select(0, beam_idx.to(past_state.device))
|
1781 |
-
for past_state in layer_past
|
1782 |
-
),
|
1783 |
-
)
|
1784 |
-
return reordered_past
|
1785 |
-
|
1786 |
-
|
1787 |
-
@add_start_docstrings(
|
1788 |
-
"""
|
1789 |
-
The DeepseekV2 Model transformer with a sequence classification head on top (linear layer).
|
1790 |
-
|
1791 |
-
[`DeepseekV2ForSequenceClassification`] uses the last token in order to do the classification, as other causal models
|
1792 |
-
(e.g. GPT-2) do.
|
1793 |
-
|
1794 |
-
Since it does classification on the last token, it requires to know the position of the last token. If a
|
1795 |
-
`pad_token_id` is defined in the configuration, it finds the last token that is not a padding token in each row. If
|
1796 |
-
no `pad_token_id` is defined, it simply takes the last value in each row of the batch. Since it cannot guess the
|
1797 |
-
padding tokens when `inputs_embeds` are passed instead of `input_ids`, it does the same (take the last value in
|
1798 |
-
each row of the batch).
|
1799 |
-
""",
|
1800 |
-
DeepseekV2_START_DOCSTRING,
|
1801 |
-
)
|
1802 |
-
class DeepseekV2ForSequenceClassification(DeepseekV2PreTrainedModel):
|
1803 |
-
def __init__(self, config):
|
1804 |
-
super().__init__(config)
|
1805 |
-
self.num_labels = config.num_labels
|
1806 |
-
self.model = DeepseekV2Model(config)
|
1807 |
-
self.score = nn.Linear(config.hidden_size, self.num_labels, bias=False)
|
1808 |
-
|
1809 |
-
# Initialize weights and apply final processing
|
1810 |
-
self.post_init()
|
1811 |
-
|
1812 |
-
def get_input_embeddings(self):
|
1813 |
-
return self.model.embed_tokens
|
1814 |
-
|
1815 |
-
def set_input_embeddings(self, value):
|
1816 |
-
self.model.embed_tokens = value
|
1817 |
-
|
1818 |
-
@add_start_docstrings_to_model_forward(DeepseekV2_INPUTS_DOCSTRING)
|
1819 |
-
def forward(
|
1820 |
-
self,
|
1821 |
-
input_ids: torch.LongTensor = None,
|
1822 |
-
attention_mask: Optional[torch.Tensor] = None,
|
1823 |
-
position_ids: Optional[torch.LongTensor] = None,
|
1824 |
-
past_key_values: Optional[List[torch.FloatTensor]] = None,
|
1825 |
-
inputs_embeds: Optional[torch.FloatTensor] = None,
|
1826 |
-
labels: Optional[torch.LongTensor] = None,
|
1827 |
-
use_cache: Optional[bool] = None,
|
1828 |
-
output_attentions: Optional[bool] = None,
|
1829 |
-
output_hidden_states: Optional[bool] = None,
|
1830 |
-
return_dict: Optional[bool] = None,
|
1831 |
-
) -> Union[Tuple, SequenceClassifierOutputWithPast]:
|
1832 |
-
r"""
|
1833 |
-
labels (`torch.LongTensor` of shape `(batch_size,)`, *optional*):
|
1834 |
-
Labels for computing the sequence classification/regression loss. Indices should be in `[0, transformers.,
|
1835 |
-
config.num_labels - 1]`. If `config.num_labels == 1` a regression loss is computed (Mean-Square loss), If
|
1836 |
-
`config.num_labels > 1` a classification loss is computed (Cross-Entropy).
|
1837 |
-
"""
|
1838 |
-
return_dict = (
|
1839 |
-
return_dict if return_dict is not None else self.config.use_return_dict
|
1840 |
-
)
|
1841 |
-
|
1842 |
-
transformer_outputs = self.model(
|
1843 |
-
input_ids,
|
1844 |
-
attention_mask=attention_mask,
|
1845 |
-
position_ids=position_ids,
|
1846 |
-
past_key_values=past_key_values,
|
1847 |
-
inputs_embeds=inputs_embeds,
|
1848 |
-
use_cache=use_cache,
|
1849 |
-
output_attentions=output_attentions,
|
1850 |
-
output_hidden_states=output_hidden_states,
|
1851 |
-
return_dict=return_dict,
|
1852 |
-
)
|
1853 |
-
hidden_states = transformer_outputs[0]
|
1854 |
-
logits = self.score(hidden_states)
|
1855 |
-
|
1856 |
-
if input_ids is not None:
|
1857 |
-
batch_size = input_ids.shape[0]
|
1858 |
-
else:
|
1859 |
-
batch_size = inputs_embeds.shape[0]
|
1860 |
-
|
1861 |
-
if self.config.pad_token_id is None and batch_size != 1:
|
1862 |
-
raise ValueError(
|
1863 |
-
"Cannot handle batch sizes > 1 if no padding token is defined."
|
1864 |
-
)
|
1865 |
-
if self.config.pad_token_id is None:
|
1866 |
-
sequence_lengths = -1
|
1867 |
-
else:
|
1868 |
-
if input_ids is not None:
|
1869 |
-
sequence_lengths = (
|
1870 |
-
torch.eq(input_ids, self.config.pad_token_id).int().argmax(-1) - 1
|
1871 |
-
).to(logits.device)
|
1872 |
-
else:
|
1873 |
-
sequence_lengths = -1
|
1874 |
-
|
1875 |
-
pooled_logits = logits[
|
1876 |
-
torch.arange(batch_size, device=logits.device), sequence_lengths
|
1877 |
-
]
|
1878 |
-
|
1879 |
-
loss = None
|
1880 |
-
if labels is not None:
|
1881 |
-
labels = labels.to(logits.device)
|
1882 |
-
if self.config.problem_type is None:
|
1883 |
-
if self.num_labels == 1:
|
1884 |
-
self.config.problem_type = "regression"
|
1885 |
-
elif self.num_labels > 1 and (
|
1886 |
-
labels.dtype == torch.long or labels.dtype == torch.int
|
1887 |
-
):
|
1888 |
-
self.config.problem_type = "single_label_classification"
|
1889 |
-
else:
|
1890 |
-
self.config.problem_type = "multi_label_classification"
|
1891 |
-
|
1892 |
-
if self.config.problem_type == "regression":
|
1893 |
-
loss_fct = MSELoss()
|
1894 |
-
if self.num_labels == 1:
|
1895 |
-
loss = loss_fct(pooled_logits.squeeze(), labels.squeeze())
|
1896 |
-
else:
|
1897 |
-
loss = loss_fct(pooled_logits, labels)
|
1898 |
-
elif self.config.problem_type == "single_label_classification":
|
1899 |
-
loss_fct = CrossEntropyLoss()
|
1900 |
-
loss = loss_fct(
|
1901 |
-
pooled_logits.view(-1, self.num_labels), labels.view(-1)
|
1902 |
-
)
|
1903 |
-
elif self.config.problem_type == "multi_label_classification":
|
1904 |
-
loss_fct = BCEWithLogitsLoss()
|
1905 |
-
loss = loss_fct(pooled_logits, labels)
|
1906 |
-
if not return_dict:
|
1907 |
-
output = (pooled_logits,) + transformer_outputs[1:]
|
1908 |
-
return ((loss,) + output) if loss is not None else output
|
1909 |
-
|
1910 |
-
return SequenceClassifierOutputWithPast(
|
1911 |
-
loss=loss,
|
1912 |
-
logits=pooled_logits,
|
1913 |
-
past_key_values=transformer_outputs.past_key_values,
|
1914 |
-
hidden_states=transformer_outputs.hidden_states,
|
1915 |
-
attentions=transformer_outputs.attentions,
|
1916 |
-
)
|
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