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Upload InternLMXComposer2ForCausalLM

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README.md ADDED
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+ ---
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+ library_name: transformers
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+ tags: []
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+ ---
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+
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+ # Model Card for Model ID
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+
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+ <!-- Provide a quick summary of what the model is/does. -->
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+
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+
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+ ## Model Details
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+
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+ ### Model Description
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+
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+ <!-- Provide a longer summary of what this model is. -->
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+
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+ This is the model card of a 🤗 transformers model that has been pushed on the Hub. This model card has been automatically generated.
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+
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+ - **Developed by:** [More Information Needed]
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+ - **Model type:** [More Information Needed]
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+ <!-- Provide the basic links for the model. -->
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+
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+ ## Uses
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+
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+ <!-- Address questions around how the model is intended to be used, including the foreseeable users of the model and those affected by the model. -->
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+
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+ ### Direct Use
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+
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+ <!-- This section is for the model use without fine-tuning or plugging into a larger ecosystem/app. -->
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+
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+ [More Information Needed]
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+
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+ ### Downstream Use [optional]
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+
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+ <!-- This section is for the model use when fine-tuned for a task, or when plugged into a larger ecosystem/app -->
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+
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+ [More Information Needed]
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+
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+ ### Out-of-Scope Use
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+
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+ <!-- This section addresses misuse, malicious use, and uses that the model will not work well for. -->
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+ [More Information Needed]
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+
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+ ## Bias, Risks, and Limitations
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+ <!-- This section is meant to convey both technical and sociotechnical limitations. -->
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+ [More Information Needed]
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+ ### Recommendations
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+ <!-- This section is meant to convey recommendations with respect to the bias, risk, and technical limitations. -->
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+ Users (both direct and downstream) should be made aware of the risks, biases and limitations of the model. More information needed for further recommendations.
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+
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+ ## How to Get Started with the Model
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+
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+ Use the code below to get started with the model.
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+ [More Information Needed]
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+
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+ ## Training Details
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+
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+ ### Training Data
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+ <!-- This should link to a Dataset Card, perhaps with a short stub of information on what the training data is all about as well as documentation related to data pre-processing or additional filtering. -->
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+ ### Training Procedure
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+ <!-- This relates heavily to the Technical Specifications. Content here should link to that section when it is relevant to the training procedure. -->
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+
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+ #### Preprocessing [optional]
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+ [More Information Needed]
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+ #### Training Hyperparameters
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+
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+ - **Training regime:** [More Information Needed] <!--fp32, fp16 mixed precision, bf16 mixed precision, bf16 non-mixed precision, fp16 non-mixed precision, fp8 mixed precision -->
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+
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+ #### Speeds, Sizes, Times [optional]
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+ <!-- This section provides information about throughput, start/end time, checkpoint size if relevant, etc. -->
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+ [More Information Needed]
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+ ## Evaluation
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+ Carbon emissions can be estimated using the [Machine Learning Impact calculator](https://mlco2.github.io/impact#compute) presented in [Lacoste et al. (2019)](https://arxiv.org/abs/1910.09700).
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+ - **Hardware Type:** [More Information Needed]
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+ - **Cloud Provider:** [More Information Needed]
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+ - **Compute Region:** [More Information Needed]
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+ - **Carbon Emitted:** [More Information Needed]
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+ ## Technical Specifications [optional]
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+ ### Model Architecture and Objective
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+ [More Information Needed]
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+ ### Compute Infrastructure
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+ #### Hardware
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build_mlp.py ADDED
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+ import math
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+ import re
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+
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+ import torch
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+ import torch.nn as nn
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+ from transformers import CLIPVisionModel
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+
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+
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+ def build_vision_tower():
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+ vision_tower = 'openai/clip-vit-large-patch14-336'
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+ return CLIPVisionTower(vision_tower)
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+
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+
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+ def build_vision_projector():
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+ projector_type = 'mlp2x_gelu'
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+ mm_hidden_size = 1024
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+ hidden_size = 4096
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+
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+ mlp_gelu_match = re.match(r'^mlp(\d+)x_gelu$', projector_type)
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+ if mlp_gelu_match:
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+ mlp_depth = int(mlp_gelu_match.group(1))
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+ modules = [nn.Linear(mm_hidden_size, hidden_size)]
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+ for _ in range(1, mlp_depth):
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+ modules.append(nn.GELU())
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+ modules.append(nn.Linear(hidden_size, hidden_size))
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+ return nn.Sequential(*modules)
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+
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+ if projector_type == 'identity':
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+ return IdentityMap()
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+
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+ raise ValueError(f'Unknown projector type: {projector_type}')
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+
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+
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+ class IdentityMap(nn.Module):
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+
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+ def __init__(self):
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+ super().__init__()
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+
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+ def forward(self, x, *args, **kwargs):
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+ return x
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+
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+ @property
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+ def config(self):
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+ return {'mm_projector_type': 'identity'}
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+
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+
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+ class CLIPVisionTower(nn.Module):
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+
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+ def __init__(self, vision_tower):
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+ super().__init__()
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+
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+ self.is_loaded = False
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+ self.is_resize_pos = False
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+
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+ self.vision_tower_name = vision_tower
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+ self.select_layer = -1
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+ self.select_feature = 'patch'
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+ self.load_model()
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+ self.resize_pos()
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+
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+ def load_model(self):
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+ self.vision_tower = CLIPVisionModel.from_pretrained(
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+ self.vision_tower_name)
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+ self.vision_tower.requires_grad_(False)
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+
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+ self.is_loaded = True
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+
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+ def resize_pos(self):
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+ pos_embed_checkpoint = self.vision_tower.vision_model.embeddings.position_embedding.weight
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+ pos_embed_checkpoint = pos_embed_checkpoint.unsqueeze(0)
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+ orig_size = 24
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+ new_size = 35
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+
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+ if pos_embed_checkpoint.shape[1] == new_size**2 + 1:
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+ self.is_resize_pos = True
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+ else:
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+ embedding_size = pos_embed_checkpoint.shape[-1]
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+ num_extra_tokens = 1
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+ new_num = new_size**2 + num_extra_tokens
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+ #print('Position interpolate from %dx%d to %dx%d' %
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+ # (orig_size, orig_size, new_size, new_size))
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+ extra_tokens = pos_embed_checkpoint[:, :num_extra_tokens]
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+ # only the position tokens are interpolated
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+ pos_tokens = pos_embed_checkpoint[:, num_extra_tokens:]
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+ pos_tokens = pos_tokens.reshape(-1, orig_size, orig_size,
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+ embedding_size).permute(
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+ 0, 3, 1, 2)
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+ pos_tokens = torch.nn.functional.interpolate(
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+ pos_tokens,
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+ size=(new_size, new_size),
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+ mode='bicubic',
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+ align_corners=False)
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+ pos_tokens = pos_tokens.permute(0, 2, 3, 1).flatten(1, 2)
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+ new_pos_embed = torch.cat((extra_tokens, pos_tokens), dim=1)
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+
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+ new_pos_embed = new_pos_embed.squeeze(0)
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+
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+ self.vision_tower.vision_model.embeddings.position_embedding = torch.nn.Embedding(
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+ new_num, 1024)
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+ self.vision_tower.vision_model.embeddings.position_embedding.weight = torch.nn.Parameter(
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+ new_pos_embed.to(pos_embed_checkpoint.dtype))
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+ self.vision_tower.vision_model.embeddings.position_ids = torch.arange(
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+ new_num).expand((1, -1))
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+
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+ self.is_resize_pos = True
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+
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+ def feature_select(self, image_forward_outs):
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+ image_features = image_forward_outs.hidden_states[self.select_layer]
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+ if self.select_feature == 'patch':
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+ image_features = image_features[:, 1:]
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+ elif self.select_feature == 'cls_patch':
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+ image_features = image_features
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+ else:
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+ raise ValueError(
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+ f'Unexpected select feature: {self.select_feature}')
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+ return image_features
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+
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+ def forward(self, images):
119
+ if not self.is_loaded:
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+ self.load_model()
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+ if type(images) is list:
122
+ image_features = []
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+ for image in images:
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+ image_forward_out = self.vision_tower(
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+ image.to(device=self.device,
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+ dtype=self.dtype).unsqueeze(0),
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+ output_hidden_states=True)
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+ image_feature = self.feature_select(image_forward_out).to(
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+ image.dtype)
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+ image_features.append(image_feature)
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+ else:
132
+ image_forward_outs = self.vision_tower(
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+ images.to(device=self.device, dtype=self.dtype),
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+ output_hidden_states=True)
135
+ image_features = self.feature_select(image_forward_outs).to(
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+ images.dtype)
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+
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+ return image_features
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+
140
+ @property
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+ def dummy_feature(self):
142
+ return torch.zeros(
143
+ 1, self.hidden_size, device=self.device, dtype=self.dtype)
144
+
145
+ @property
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+ def dtype(self):
147
+ return self.vision_tower.dtype
148
+
149
+ @property
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+ def device(self):
151
+ return self.vision_tower.device
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+
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+ @property
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+ def config(self):
155
+ if self.is_loaded:
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+ return self.vision_tower.config
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+ else:
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+ return self.cfg_only
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+
160
+ @property
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+ def hidden_size(self):
162
+ return self.config.hidden_size
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+
164
+ @property
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+ def num_patches(self):
166
+ return (self.config.image_size // self.config.patch_size)**2
167
+
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+
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+ class PLoRA(nn.Linear):
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+
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+ def __init__(self,
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+ in_features: int,
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+ out_features: int,
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+ bias: bool = True,
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+ device=None,
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+ dtype=None,
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+ lora_r=8,
178
+ lora_alpha=16,
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+ lora_dropout=0.05,
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+ lora_len=0,
181
+ **kwargs) -> None:
182
+ super().__init__(in_features, out_features, bias, device, dtype)
183
+ self.lora_r = lora_r
184
+ self.lora_alpha = lora_alpha
185
+ self.lora_len = lora_len
186
+ if lora_dropout > 0.:
187
+ self.lora_dropout = nn.Dropout(p=lora_dropout)
188
+ else:
189
+ self.lora_dropout = lambda x: x
190
+ self.lora_scaling = self.lora_alpha / self.lora_r
191
+
192
+ self.Plora_A = nn.Linear(
193
+ in_features, self.lora_r, bias=False, device=device, dtype=dtype)
194
+ self.Plora_B = nn.Linear(
195
+ self.lora_r, out_features, bias=False, device=device, dtype=dtype)
196
+
197
+ self.reset_parameters()
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+
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+ def reset_parameters(self):
200
+ if hasattr(self, 'lora_A'):
201
+ # initialize A the same way as the default for nn.Linear and B to zero
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+ nn.init.kaiming_uniform_(self.lora_A.weight, a=math.sqrt(5))
203
+ nn.init.zeros_(self.lora_B.weight)
204
+
205
+ def forward(self, x, im_mask=None):
206
+ res = super().forward(x)
207
+ if im_mask is not None:
208
+ if torch.sum(im_mask) > 0:
209
+ part_x = x[im_mask]
210
+ res[im_mask] += self.Plora_B(
211
+ self.Plora_A(
212
+ self.lora_dropout(part_x))) * self.lora_scaling
213
+ else:
214
+ part_x = x[:, :1]
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+ res[:, :1] += self.Plora_B(
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+ self.Plora_A(self.lora_dropout(part_x))) * 0
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+ return res
config.json ADDED
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+ {
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+ "_name_or_path": "ckpts/internlm-xcomposer2-vl-7b-dpo/bs128_ep1_mg0_bt0.1_lr1e-5_VLFeedback/merged",
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+ "architectures": [
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+ "InternLMXComposer2ForCausalLM"
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+ ],
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+ "auto_map": {
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+ "AutoConfig": "configuration_internlm_xcomposer2.InternLMXcomposer2Config",
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+ "AutoModel": "modeling_internlm_xcomposer2.InternLMXComposer2ForCausalLM",
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+ "AutoModelForCausalLM": "modeling_internlm_xcomposer2.InternLMXComposer2ForCausalLM"
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+ },
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+ "bias": false,
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+ "bos_token_id": 1,
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+ "eos_token_id": 2,
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+ "hidden_act": "silu",
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+ "hidden_size": 4096,
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+ "ignore_index": -100,
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+ "image_token_index": 92544,
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+ "img_size": 490,
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+ "initializer_range": 0.02,
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+ "intermediate_size": 14336,
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+ "max_length": 4096,
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+ "max_position_embeddings": 32768,
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+ "model_type": "internlm",
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+ "num_attention_heads": 32,
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+ "num_hidden_layers": 32,
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+ "num_key_value_heads": 8,
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+ "pad_token_id": 2,
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+ "rms_norm_eps": 1e-05,
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+ "rope_scaling": {
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+ "factor": 1.0,
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+ "type": "dynamic"
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+ },
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+ "rope_theta": 1000000,
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+ "tie_word_embeddings": false,
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+ "torch_dtype": "float16",
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+ "transformers_version": "4.41.0",
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+ "use_cache": false,
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+ "vocab_size": 92544
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+ }
configuration_internlm_xcomposer2.py ADDED
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+ # coding=utf-8
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+ # Copyright (c) InternLM. 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
6
+ # 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.
8
+ #
9
+ # Licensed under the Apache License, Version 2.0 (the "License");
10
+ # you may not use this file except in compliance with the License.
11
+ # You may obtain a copy of the License at
12
+ #
13
+ # http://www.apache.org/licenses/LICENSE-2.0
14
+ #
15
+ # Unless required by applicable law or agreed to in writing, software
16
+ # distributed under the License is distributed on an "AS IS" BASIS,
17
+ # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18
+ # See the License for the specific language governing permissions and
19
+ # limitations under the License.
20
+ """ InternLM model configuration"""
21
+
22
+ from transformers.configuration_utils import PretrainedConfig
23
+ from transformers.utils import logging
24
+
25
+ logger = logging.get_logger(__name__)
26
+
27
+ INTERNLM_PRETRAINED_CONFIG_ARCHIVE_MAP = {}
28
+
29
+
30
+ class InternLMXcomposer2Config(PretrainedConfig):
31
+ r"""
32
+ This is the configuration class to store the configuration of a [`InternLMModel`]. It is used to instantiate
33
+ an InternLM model according to the specified arguments, defining the model architecture. Instantiating a
34
+ configuration with the defaults will yield a similar configuration to that of the InternLM-7B.
35
+
36
+ Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the
37
+ documentation from [`PretrainedConfig`] for more information.
38
+
39
+
40
+ Args:
41
+ vocab_size (`int`, *optional*, defaults to 32000):
42
+ Vocabulary size of the InternLM model. Defines the number of different tokens that can be represented by the
43
+ `inputs_ids` passed when calling [`InternLMModel`]
44
+ hidden_size (`int`, *optional*, defaults to 4096):
45
+ Dimension of the hidden representations.
46
+ intermediate_size (`int`, *optional*, defaults to 11008):
47
+ Dimension of the MLP representations.
48
+ num_hidden_layers (`int`, *optional*, defaults to 32):
49
+ Number of hidden layers in the Transformer encoder.
50
+ num_attention_heads (`int`, *optional*, defaults to 32):
51
+ Number of attention heads for each attention layer in the Transformer encoder.
52
+ num_key_value_heads (`int`, *optional*):
53
+ This is the number of key_value heads that should be used to implement Grouped Query Attention. If
54
+ `num_key_value_heads=num_attention_heads`, the model will use Multi Head Attention (MHA), if
55
+ `num_key_value_heads=1 the model will use Multi Query Attention (MQA) otherwise GQA is used. When
56
+ converting a multi-head checkpoint to a GQA checkpoint, each group key and value head should be constructed
57
+ by meanpooling all the original heads within that group. For more details checkout [this
58
+ paper](https://arxiv.org/pdf/2305.13245.pdf). If it is not specified, will default to
59
+ `num_attention_heads`.
60
+ hidden_act (`str` or `function`, *optional*, defaults to `"silu"`):
61
+ The non-linear activation function (function or string) in the decoder.
62
+ max_position_embeddings (`int`, *optional*, defaults to 2048):
63
+ The maximum sequence length that this model might ever be used with. Typically set this to something large
64
+ just in case (e.g., 512 or 1024 or 2048).
65
+ initializer_range (`float`, *optional*, defaults to 0.02):
66
+ The standard deviation of the truncated_normal_initializer for initializing all weight matrices.
67
+ rms_norm_eps (`float`, *optional*, defaults to 1e-12):
68
+ The epsilon used by the rms normalization layers.
69
+ use_cache (`bool`, *optional*, defaults to `True`):
70
+ Whether or not the model should return the last key/values attentions (not used by all models). Only
71
+ relevant if `config.is_decoder=True`.
72
+ tie_word_embeddings(`bool`, *optional*, defaults to `False`):
73
+ Whether to tie weight embeddings
74
+ Example:
75
+
76
+ ```python
77
+ >>> from transformers import InternLMModel, InternLMConfig
78
+
79
+ >>> # Initializing a InternLM internlm-7b style configuration
80
+ >>> configuration = InternLMConfig()
81
+
82
+ >>> # Initializing a model from the internlm-7b style configuration
83
+ >>> model = InternLMModel(configuration)
84
+
85
+ >>> # Accessing the model configuration
86
+ >>> configuration = model.config
87
+ ```"""
88
+ model_type = "internlm"
89
+ _auto_class = "AutoConfig"
90
+
91
+ def __init__( # pylint: disable=W0102
92
+ self,
93
+ vocab_size=103168,
94
+ hidden_size=4096,
95
+ intermediate_size=11008,
96
+ num_hidden_layers=32,
97
+ num_attention_heads=32,
98
+ num_key_value_heads=None,
99
+ hidden_act="silu",
100
+ max_position_embeddings=2048,
101
+ initializer_range=0.02,
102
+ rms_norm_eps=1e-6,
103
+ use_cache=True,
104
+ pad_token_id=0,
105
+ bos_token_id=1,
106
+ eos_token_id=2,
107
+ tie_word_embeddings=False,
108
+ bias=True,
109
+ rope_theta=10000,
110
+ rope_scaling=None,
111
+ **kwargs,
112
+ ):
113
+ self.vocab_size = vocab_size
114
+ self.max_position_embeddings = max_position_embeddings
115
+ self.hidden_size = hidden_size
116
+ self.intermediate_size = intermediate_size
117
+ self.num_hidden_layers = num_hidden_layers
118
+ self.num_attention_heads = num_attention_heads
119
+ self.bias = bias
120
+
121
+ if num_key_value_heads is None:
122
+ num_key_value_heads = num_attention_heads
123
+ self.num_key_value_heads = num_key_value_heads
124
+
125
+ self.hidden_act = hidden_act
126
+ self.initializer_range = initializer_range
127
+ self.rms_norm_eps = rms_norm_eps
128
+ self.use_cache = use_cache
129
+ self.rope_theta = rope_theta
130
+ self.rope_scaling = rope_scaling
131
+ self._rope_scaling_validation()
132
+ super().__init__(
133
+ pad_token_id=pad_token_id,
134
+ bos_token_id=bos_token_id,
135
+ eos_token_id=eos_token_id,
136
+ tie_word_embeddings=tie_word_embeddings,
137
+ **kwargs,
138
+ )
139
+
140
+ def _rope_scaling_validation(self):
141
+ """
142
+ Validate the `rope_scaling` configuration.
143
+ """
144
+ if self.rope_scaling is None:
145
+ return
146
+
147
+ if not isinstance(self.rope_scaling, dict) or len(self.rope_scaling) != 2:
148
+ raise ValueError(
149
+ "`rope_scaling` must be a dictionary with with two fields, `type` and `factor`, "
150
+ f"got {self.rope_scaling}"
151
+ )
152
+ rope_scaling_type = self.rope_scaling.get("type", None)
153
+ rope_scaling_factor = self.rope_scaling.get("factor", None)
154
+ if rope_scaling_type is None or rope_scaling_type not in ["linear", "dynamic"]:
155
+ raise ValueError(
156
+ f"`rope_scaling`'s type field must be one of ['linear', 'dynamic'], got {rope_scaling_type}"
157
+ )
158
+ if rope_scaling_factor is None or not isinstance(rope_scaling_factor, float) or rope_scaling_factor < 1.0:
159
+ raise ValueError(f"`rope_scaling`'s factor field must be a float >= 1, got {rope_scaling_factor}")
generation_config.json ADDED
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+ "max_length": 1600,
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+ "pad_token_id": 2,
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+ "transformers_version": "4.41.0",
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+ "use_cache": false
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+ }
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+ }
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+ }
modeling_internlm2.py ADDED
@@ -0,0 +1,965 @@
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
+ # # Copyright (c) InternLM. All rights reserved.
2
+ #
3
+ # This code is based on EleutherAI's GPT-NeoX library and the GPT-NeoX
4
+ # and OPT implementations in this library. It has been modified from its
5
+ # original forms to accommodate minor architectural differences compared
6
+ # to GPT-NeoX and OPT used by the Meta AI team that trained the model.
7
+ #
8
+ # Licensed under the Apache License, Version 2.0 (the "License");
9
+ # you may not use this file except in compliance with the License.
10
+ # You may obtain a copy of the License at
11
+ #
12
+ # http://www.apache.org/licenses/LICENSE-2.0
13
+ #
14
+ # Unless required by applicable law or agreed to in writing, software
15
+ # distributed under the License is distributed on an "AS IS" BASIS,
16
+ # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17
+ # See the License for the specific language governing permissions and
18
+ # limitations under the License.
19
+ """PyTorch InternLM2 model."""
20
+ import math
21
+ import warnings
22
+ from typing import List, Optional, Tuple, Union
23
+
24
+ import torch
25
+ import torch.utils.checkpoint
26
+ from einops import rearrange
27
+ from torch import nn
28
+ from transformers.activations import ACT2FN
29
+ from transformers.modeling_outputs import BaseModelOutputWithPast
30
+ from transformers.modeling_utils import PreTrainedModel
31
+ from transformers.utils import (add_start_docstrings,
32
+ add_start_docstrings_to_model_forward, logging)
33
+
34
+ try:
35
+ from transformers.generation.streamers import BaseStreamer
36
+ except: # noqa # pylint: disable=bare-except
37
+ BaseStreamer = None
38
+
39
+ from .build_mlp import PLoRA
40
+ from .configuration_internlm_xcomposer2 import InternLMXcomposer2Config as InternLM2Config
41
+ logger = logging.get_logger(__name__)
42
+
43
+ _CONFIG_FOR_DOC = 'InternLM2Config'
44
+
45
+
46
+ # Copied from transformers.models.bart.modeling_bart._make_causal_mask
47
+ def _make_causal_mask(input_ids_shape: torch.Size,
48
+ dtype: torch.dtype,
49
+ device: torch.device,
50
+ past_key_values_length: int = 0):
51
+ """Make causal mask used for bi-directional self-attention."""
52
+ bsz, tgt_len = input_ids_shape
53
+ mask = torch.full((tgt_len, tgt_len),
54
+ torch.tensor(torch.finfo(dtype).min, device=device),
55
+ device=device)
56
+ mask_cond = torch.arange(mask.size(-1), device=device)
57
+ mask.masked_fill_(mask_cond < (mask_cond + 1).view(mask.size(-1), 1), 0)
58
+ mask = mask.to(dtype)
59
+
60
+ if past_key_values_length > 0:
61
+ mask = torch.cat([
62
+ torch.zeros(
63
+ tgt_len, past_key_values_length, dtype=dtype, device=device),
64
+ mask
65
+ ],
66
+ dim=-1)
67
+ return mask[None, None, :, :].expand(bsz, 1, tgt_len,
68
+ tgt_len + past_key_values_length)
69
+
70
+
71
+ # Copied from transformers.models.bart.modeling_bart._expand_mask
72
+ def _expand_mask(mask: torch.Tensor,
73
+ dtype: torch.dtype,
74
+ tgt_len: Optional[int] = None):
75
+ """Expands attention_mask from `[bsz, seq_len]` to `[bsz, 1, tgt_seq_len,
76
+ src_seq_len]`."""
77
+ bsz, src_len = mask.size()
78
+ tgt_len = tgt_len if tgt_len is not None else src_len
79
+
80
+ expanded_mask = mask[:, None, None, :].expand(bsz, 1, tgt_len,
81
+ src_len).to(dtype)
82
+
83
+ inverted_mask = 1.0 - expanded_mask
84
+
85
+ return inverted_mask.masked_fill(
86
+ inverted_mask.to(torch.bool),
87
+ torch.finfo(dtype).min)
88
+
89
+
90
+ class InternLM2RMSNorm(nn.Module):
91
+
92
+ def __init__(self, hidden_size, eps=1e-6):
93
+ """InternLM2RMSNorm is equivalent to T5LayerNorm."""
94
+ super().__init__()
95
+ self.weight = nn.Parameter(torch.ones(hidden_size))
96
+ self.variance_epsilon = eps
97
+
98
+ def forward(self, hidden_states):
99
+ input_dtype = hidden_states.dtype
100
+ hidden_states = hidden_states.to(torch.float32)
101
+ variance = hidden_states.pow(2).mean(-1, keepdim=True)
102
+ hidden_states = hidden_states * torch.rsqrt(variance +
103
+ self.variance_epsilon)
104
+ return self.weight * hidden_states.to(input_dtype)
105
+
106
+
107
+ class InternLM2RotaryEmbedding(nn.Module):
108
+
109
+ def __init__(self,
110
+ dim,
111
+ max_position_embeddings=2048,
112
+ base=10000,
113
+ device=None):
114
+ super().__init__()
115
+
116
+ self.dim = dim
117
+ self.max_position_embeddings = max_position_embeddings
118
+ self.base = base
119
+ inv_freq = 1.0 / (
120
+ self.base
121
+ **(torch.arange(0, self.dim, 2).float().to(device) / self.dim))
122
+ self.register_buffer('inv_freq', inv_freq, persistent=False)
123
+
124
+ # Build here to make `torch.jit.trace` work.
125
+ self._set_cos_sin_cache(
126
+ seq_len=max_position_embeddings,
127
+ device=self.inv_freq.device,
128
+ dtype=torch.get_default_dtype())
129
+
130
+ def _set_cos_sin_cache(self, seq_len, device, dtype):
131
+ self.max_seq_len_cached = seq_len
132
+ t = torch.arange(
133
+ self.max_seq_len_cached, device=device, dtype=self.inv_freq.dtype)
134
+
135
+ freqs = torch.einsum('i,j->ij', t, self.inv_freq)
136
+ # Different from paper, but it uses a different permutation in order to obtain the same calculation
137
+ emb = torch.cat((freqs, freqs), dim=-1)
138
+ self.register_buffer(
139
+ 'cos_cached', emb.cos().to(dtype), persistent=False)
140
+ self.register_buffer(
141
+ 'sin_cached', emb.sin().to(dtype), persistent=False)
142
+
143
+ def forward(self, x, seq_len=None):
144
+ # x: [bs, num_attention_heads, seq_len, head_size]
145
+ if seq_len > self.max_seq_len_cached:
146
+ self._set_cos_sin_cache(
147
+ seq_len=seq_len, device=x.device, dtype=x.dtype)
148
+
149
+ return (
150
+ self.cos_cached[:seq_len].to(dtype=x.dtype),
151
+ self.sin_cached[:seq_len].to(dtype=x.dtype),
152
+ )
153
+
154
+
155
+ class InternLM2LinearScalingRotaryEmbedding(InternLM2RotaryEmbedding):
156
+ """InternLM2RotaryEmbedding extended with linear scaling.
157
+
158
+ Credits to the Reddit user /u/kaiokendev
159
+ """
160
+
161
+ def __init__(self,
162
+ dim,
163
+ max_position_embeddings=2048,
164
+ base=10000,
165
+ device=None,
166
+ scaling_factor=1.0):
167
+ self.scaling_factor = scaling_factor
168
+ super().__init__(dim, max_position_embeddings, base, device)
169
+
170
+ def _set_cos_sin_cache(self, seq_len, device, dtype):
171
+ self.max_seq_len_cached = seq_len
172
+ t = torch.arange(
173
+ self.max_seq_len_cached, device=device, dtype=self.inv_freq.dtype)
174
+ t = t / self.scaling_factor
175
+
176
+ freqs = torch.einsum('i,j->ij', t, self.inv_freq)
177
+ # Different from paper, but it uses a different permutation in order to obtain the same calculation
178
+ emb = torch.cat((freqs, freqs), dim=-1)
179
+ self.register_buffer(
180
+ 'cos_cached', emb.cos().to(dtype), persistent=False)
181
+ self.register_buffer(
182
+ 'sin_cached', emb.sin().to(dtype), persistent=False)
183
+
184
+
185
+ class InternLM2DynamicNTKScalingRotaryEmbedding(InternLM2RotaryEmbedding):
186
+ """InternLM2RotaryEmbedding extended with Dynamic NTK scaling.
187
+
188
+ Credits to the Reddit users /u/bloc97 and /u/emozilla.
189
+ """
190
+
191
+ def __init__(self,
192
+ dim,
193
+ max_position_embeddings=2048,
194
+ base=10000,
195
+ device=None,
196
+ scaling_factor=1.0):
197
+ self.scaling_factor = scaling_factor
198
+ super().__init__(dim, max_position_embeddings, base, device)
199
+
200
+ def _set_cos_sin_cache(self, seq_len, device, dtype):
201
+ self.max_seq_len_cached = seq_len
202
+
203
+ if seq_len > self.max_position_embeddings:
204
+ base = self.base * ((self.scaling_factor * seq_len /
205
+ self.max_position_embeddings) -
206
+ (self.scaling_factor - 1))**(
207
+ self.dim / (self.dim - 2))
208
+ inv_freq = 1.0 / (
209
+ base
210
+ **(torch.arange(0, self.dim, 2).float().to(device) / self.dim))
211
+ self.register_buffer('inv_freq', inv_freq, persistent=False)
212
+
213
+ t = torch.arange(
214
+ self.max_seq_len_cached, device=device, dtype=self.inv_freq.dtype)
215
+
216
+ freqs = torch.einsum('i,j->ij', t, self.inv_freq)
217
+ # Different from paper, but it uses a different permutation in order to obtain the same calculation
218
+ emb = torch.cat((freqs, freqs), dim=-1)
219
+ self.register_buffer(
220
+ 'cos_cached', emb.cos().to(dtype), persistent=False)
221
+ self.register_buffer(
222
+ 'sin_cached', emb.sin().to(dtype), persistent=False)
223
+
224
+
225
+ def rotate_half(x):
226
+ """Rotates half the hidden dims of the input."""
227
+ x1 = x[..., :x.shape[-1] // 2]
228
+ x2 = x[..., x.shape[-1] // 2:]
229
+ return torch.cat((-x2, x1), dim=-1)
230
+
231
+
232
+ def apply_rotary_pos_emb(q, k, cos, sin, position_ids):
233
+ # The first two dimensions of cos and sin are always 1, so we can `squeeze` them.
234
+ cos = cos.squeeze(1).squeeze(0) # [seq_len, dim]
235
+ sin = sin.squeeze(1).squeeze(0) # [seq_len, dim]
236
+ cos = cos.unsqueeze(0).unsqueeze(0).expand(len(position_ids), -1, -1, -1)
237
+ sin = sin.unsqueeze(0).unsqueeze(0).expand(len(position_ids), -1, -1, -1)
238
+ if q.size(2) == 1:
239
+ q_embed = (q * cos[:, :, -1:, :]) + (
240
+ rotate_half(q) * sin[:, :, -1:, :])
241
+ else:
242
+ q_embed = (q * cos) + (rotate_half(q) * sin)
243
+
244
+ if k.size(2) == 1:
245
+ k_embed = (k * cos[:, :, -1:, :]) + (
246
+ rotate_half(k) * sin[:, :, -1:, :])
247
+ else:
248
+ k_embed = (k * cos) + (rotate_half(k) * sin)
249
+
250
+ return q_embed, k_embed
251
+
252
+
253
+ class InternLM2MLP(nn.Module):
254
+
255
+ def __init__(self, config):
256
+ super().__init__()
257
+ self.config = config
258
+ self.hidden_size = config.hidden_size
259
+ self.intermediate_size = config.intermediate_size
260
+
261
+ self.w1 = PLoRA(
262
+ self.hidden_size,
263
+ self.intermediate_size,
264
+ bias=False,
265
+ lora_r=256,
266
+ lora_alpha=256,
267
+ lora_len=576)
268
+ self.w3 = PLoRA(
269
+ self.hidden_size,
270
+ self.intermediate_size,
271
+ bias=False,
272
+ lora_r=256,
273
+ lora_alpha=256,
274
+ lora_len=576)
275
+ self.w2 = PLoRA(
276
+ self.intermediate_size,
277
+ self.hidden_size,
278
+ bias=False,
279
+ lora_r=256,
280
+ lora_alpha=256,
281
+ lora_len=576)
282
+
283
+ self.act_fn = ACT2FN[config.hidden_act]
284
+
285
+ def forward(self, x, im_mask):
286
+ down_proj = self.w2(
287
+ self.act_fn(self.w1(x, im_mask)) * self.w3(x, im_mask), im_mask)
288
+
289
+ return down_proj
290
+
291
+
292
+ def repeat_kv(hidden_states: torch.Tensor, n_rep: int) -> torch.Tensor:
293
+ """This is the equivalent of torch.repeat_interleave(x, dim=1,
294
+ repeats=n_rep).
295
+
296
+ The hidden states go from (batch, num_key_value_heads, seqlen, head_dim) to
297
+ (batch, num_attention_heads, seqlen, head_dim)
298
+ """
299
+ batch, num_key_value_heads, slen, head_dim = hidden_states.shape
300
+ if n_rep == 1:
301
+ return hidden_states
302
+ hidden_states = hidden_states[:, :,
303
+ None, :, :].expand(batch,
304
+ num_key_value_heads,
305
+ n_rep, slen, head_dim)
306
+ return hidden_states.reshape(batch, num_key_value_heads * n_rep, slen,
307
+ head_dim)
308
+
309
+
310
+ class InternLM2Attention(nn.Module):
311
+ """Multi-headed attention from 'Attention Is All You Need' paper."""
312
+
313
+ def __init__(self, config: InternLM2Config):
314
+ super().__init__()
315
+ self.config = config
316
+ self.hidden_size = config.hidden_size
317
+ self.num_heads = config.num_attention_heads
318
+ self.head_dim = self.hidden_size // self.num_heads
319
+ self.num_key_value_heads = config.num_key_value_heads
320
+ self.num_key_value_groups = self.num_heads // self.num_key_value_heads
321
+ self.max_position_embeddings = config.max_position_embeddings
322
+ self.is_causal = True
323
+
324
+ if (self.head_dim * self.num_heads) != self.hidden_size:
325
+ raise ValueError(
326
+ f'hidden_size must be divisible by num_heads (got `hidden_size`: {self.hidden_size}'
327
+ f' and `num_heads`: {self.num_heads}).')
328
+
329
+ self.wqkv = PLoRA(
330
+ self.hidden_size,
331
+ (self.num_heads + 2 * self.num_key_value_heads) * self.head_dim,
332
+ bias=config.bias,
333
+ lora_r=256,
334
+ lora_alpha=256,
335
+ lora_len=576)
336
+
337
+ self.wo = PLoRA(
338
+ self.num_heads * self.head_dim,
339
+ self.hidden_size,
340
+ bias=config.bias,
341
+ lora_r=256,
342
+ lora_alpha=256,
343
+ lora_len=576)
344
+ self._init_rope()
345
+
346
+ def _init_rope(self):
347
+ if self.config.rope_scaling is None:
348
+ self.rotary_emb = InternLM2RotaryEmbedding(
349
+ self.head_dim,
350
+ max_position_embeddings=self.max_position_embeddings,
351
+ base=self.config.rope_theta,
352
+ )
353
+ else:
354
+ scaling_type = self.config.rope_scaling['type']
355
+ scaling_factor = self.config.rope_scaling['factor']
356
+ if scaling_type == 'dynamic':
357
+ self.rotary_emb = InternLM2DynamicNTKScalingRotaryEmbedding(
358
+ self.head_dim,
359
+ max_position_embeddings=self.max_position_embeddings,
360
+ base=self.config.rope_theta,
361
+ scaling_factor=scaling_factor)
362
+ else:
363
+ raise ValueError(
364
+ "Currently we only support rotary embedding's type being 'dynamic'."
365
+ )
366
+ return self.rotary_emb
367
+
368
+ def _shape(self, tensor: torch.Tensor, seq_len: int, bsz: int):
369
+ return tensor.view(bsz, seq_len, self.num_heads,
370
+ self.head_dim).transpose(1, 2).contiguous()
371
+
372
+ def forward(
373
+ self,
374
+ hidden_states: torch.Tensor,
375
+ attention_mask: Optional[torch.Tensor] = None,
376
+ position_ids: Optional[torch.LongTensor] = None,
377
+ past_key_value: Optional[Tuple[torch.Tensor]] = None,
378
+ output_attentions: bool = False,
379
+ use_cache: bool = False,
380
+ im_mask: Optional[Tuple[torch.Tensor]] = None,
381
+ **kwargs,
382
+ ) -> Tuple[torch.Tensor, Optional[torch.Tensor],
383
+ Optional[Tuple[torch.Tensor]]]:
384
+ if 'padding_mask' in kwargs:
385
+ warnings.warn(
386
+ 'Passing `padding_mask` is deprecated and will be removed in v4.37. '
387
+ 'Please make sure use `attention_mask` instead.`')
388
+
389
+ bsz, q_len, _ = hidden_states.size()
390
+
391
+ qkv_states = self.wqkv(hidden_states, im_mask)
392
+
393
+ qkv_states = rearrange(
394
+ qkv_states,
395
+ 'b q (h gs d) -> b q h gs d',
396
+ gs=2 + self.num_key_value_groups,
397
+ d=self.head_dim,
398
+ )
399
+
400
+ query_states = qkv_states[..., :self.num_key_value_groups, :]
401
+ query_states = rearrange(query_states, 'b q h gs d -> b q (h gs) d')
402
+ key_states = qkv_states[..., -2, :]
403
+ value_states = qkv_states[..., -1, :]
404
+
405
+ query_states = query_states.transpose(1, 2)
406
+ key_states = key_states.transpose(1, 2)
407
+ value_states = value_states.transpose(1, 2)
408
+
409
+ kv_seq_len = key_states.shape[-2]
410
+ if past_key_value is not None:
411
+ kv_seq_len += past_key_value[0].shape[-2]
412
+ cos, sin = self.rotary_emb(value_states, seq_len=kv_seq_len)
413
+ query_states, key_states = apply_rotary_pos_emb(
414
+ query_states, key_states, cos, sin, position_ids)
415
+
416
+ if past_key_value is not None:
417
+ # reuse k, v, self_attention
418
+ key_states = torch.cat([past_key_value[0], key_states], dim=2)
419
+ value_states = torch.cat([past_key_value[1], value_states], dim=2)
420
+
421
+ past_key_value = (key_states, value_states) if use_cache else None
422
+
423
+ key_states = repeat_kv(key_states, self.num_key_value_groups)
424
+ value_states = repeat_kv(value_states, self.num_key_value_groups)
425
+
426
+ attn_weights = torch.matmul(query_states, key_states.transpose(
427
+ 2, 3)) / math.sqrt(self.head_dim)
428
+
429
+ if attn_weights.size() != (bsz, self.num_heads, q_len, kv_seq_len):
430
+ raise ValueError(
431
+ f'Attention weights should be of size {(bsz, self.num_heads, q_len, kv_seq_len)}, but is'
432
+ f' {attn_weights.size()}')
433
+
434
+ if attention_mask is not None:
435
+ if attention_mask.size() != (bsz, 1, q_len, kv_seq_len):
436
+ raise ValueError(
437
+ f'Attention mask should be of size {(bsz, 1, q_len, kv_seq_len)}, but is {attention_mask.size()}'
438
+ )
439
+ attn_weights = attn_weights + attention_mask
440
+
441
+ # upcast attention to fp32
442
+ attn_weights = nn.functional.softmax(
443
+ attn_weights, dim=-1, dtype=torch.float32).to(query_states.dtype)
444
+ attn_output = torch.matmul(attn_weights, value_states)
445
+
446
+ if attn_output.size() != (bsz, self.num_heads, q_len, self.head_dim):
447
+ raise ValueError(
448
+ f'`attn_output` should be of size {(bsz, self.num_heads, q_len, self.head_dim)}, but is'
449
+ f' {attn_output.size()}')
450
+
451
+ attn_output = attn_output.transpose(1, 2).contiguous()
452
+ attn_output = attn_output.reshape(bsz, q_len, self.hidden_size)
453
+
454
+ attn_output = self.wo(attn_output, im_mask)
455
+
456
+ if not output_attentions:
457
+ attn_weights = None
458
+
459
+ return attn_output, attn_weights, past_key_value
460
+
461
+
462
+ class InternLM2FlashAttention2(InternLM2Attention):
463
+ """InternLM2 flash attention module.
464
+
465
+ This module inherits from `InternLM2Attention` as the weights of the module
466
+ stays untouched. The only required change would be on the forward pass
467
+ where it needs to correctly call the public API of flash attention and deal
468
+ with padding tokens in case the input contains any of them.
469
+ """
470
+
471
+ def forward(
472
+ self,
473
+ hidden_states: torch.Tensor,
474
+ attention_mask: Optional[torch.LongTensor] = None,
475
+ position_ids: Optional[torch.LongTensor] = None,
476
+ past_key_value: Optional[Tuple[torch.Tensor]] = None,
477
+ output_attentions: bool = False,
478
+ use_cache: bool = False,
479
+ im_mask: Optional[Tuple[torch.Tensor]] = None,
480
+ **kwargs,
481
+ ) -> Tuple[torch.Tensor, Optional[torch.Tensor],
482
+ Optional[Tuple[torch.Tensor]]]:
483
+ # InternLM2FlashAttention2 attention does not support output_attentions
484
+ if 'padding_mask' in kwargs:
485
+ warnings.warn(
486
+ 'Passing `padding_mask` is deprecated and will be removed in v4.37. '
487
+ 'Please make sure use `attention_mask` instead.`')
488
+
489
+ # overwrite attention_mask with padding_mask
490
+ attention_mask = kwargs.pop('padding_mask')
491
+
492
+ output_attentions = False
493
+
494
+ bsz, q_len, _ = hidden_states.size()
495
+
496
+ qkv_states = self.wqkv(hidden_states, im_mask)
497
+
498
+ qkv_states = rearrange(
499
+ qkv_states,
500
+ 'b q (h gs d) -> b q h gs d',
501
+ gs=self.num_heads + 2 * self.num_key_value_heads,
502
+ d=self.head_dim,
503
+ q=q_len,
504
+ )
505
+
506
+ query_states = qkv_states[..., :self.num_key_value_groups, :]
507
+ query_states = rearrange(query_states, 'b q h gs d -> b q (h gs) d')
508
+ key_states = qkv_states[..., -2, :]
509
+ value_states = qkv_states[..., -1, :]
510
+
511
+ kv_seq_len = key_states.shape[-2]
512
+ if past_key_value is not None:
513
+ kv_seq_len += past_key_value[0].shape[-2]
514
+
515
+ cos, sin = self.rotary_emb(value_states, seq_len=kv_seq_len)
516
+
517
+ query_states, key_states = apply_rotary_pos_emb(
518
+ query_states, key_states, cos, sin, position_ids)
519
+
520
+ if past_key_value is not None:
521
+ # reuse k, v, self_attention
522
+ key_states = torch.cat([past_key_value[0], key_states], dim=2)
523
+ value_states = torch.cat([past_key_value[1], value_states], dim=2)
524
+
525
+ past_key_value = (key_states, value_states) if use_cache else None
526
+
527
+ query_states = query_states.transpose(1, 2)
528
+ key_states = key_states.transpose(1, 2)
529
+ value_states = value_states.transpose(1, 2)
530
+
531
+ dropout_rate = 0.0 if not self.training else self.attention_dropout
532
+
533
+ # In PEFT, usually we cast the layer norms in float32 for training stability reasons
534
+ # therefore the input hidden states gets silently casted in float32. Hence, we need
535
+ # cast them back in the correct dtype just to be sure everything works as expected.
536
+ # This might slowdown training & inference so it is recommended to not cast the LayerNorms
537
+ # in fp32. (InternLM2RMSNorm handles it correctly)
538
+
539
+ input_dtype = query_states.dtype
540
+ if input_dtype == torch.float32:
541
+ # Handle the case where the model is quantized
542
+ if hasattr(self.config, '_pre_quantization_dtype'):
543
+ target_dtype = self.config._pre_quantization_dtype
544
+ else:
545
+ target_dtype = self.q_proj.weight.dtype
546
+
547
+ logger.warning_once(
548
+ f'The input hidden states seems to be silently casted in float32, this might be related to'
549
+ f' the fact you have upcasted embedding or layer norm layers in float32. We will cast back '
550
+ f'the input in {target_dtype}.')
551
+
552
+ query_states = query_states.to(target_dtype)
553
+ key_states = key_states.to(target_dtype)
554
+ value_states = value_states.to(target_dtype)
555
+
556
+ attn_output = self._flash_attention_forward(
557
+ query_states,
558
+ key_states,
559
+ value_states,
560
+ attention_mask,
561
+ q_len,
562
+ dropout=dropout_rate)
563
+
564
+ attn_output = attn_output.reshape(bsz, q_len,
565
+ self.hidden_size).contiguous()
566
+ attn_output = self.wo(attn_output, im_mask)
567
+
568
+ if not output_attentions:
569
+ attn_weights = None
570
+
571
+ return attn_output, attn_weights, past_key_value
572
+
573
+
574
+ class InternLM2DecoderLayer(nn.Module):
575
+
576
+ def __init__(self, config: InternLM2Config):
577
+ super().__init__()
578
+ self.hidden_size = config.hidden_size
579
+ self.attention = (
580
+ InternLM2Attention(config=config)
581
+ if not getattr(config, '_flash_attn_2_enabled', False) else
582
+ InternLM2FlashAttention2(config=config))
583
+ self.feed_forward = InternLM2MLP(config)
584
+ self.attention_norm = InternLM2RMSNorm(
585
+ config.hidden_size, eps=config.rms_norm_eps)
586
+ self.ffn_norm = InternLM2RMSNorm(
587
+ config.hidden_size, eps=config.rms_norm_eps)
588
+
589
+ def forward(
590
+ self,
591
+ hidden_states: torch.Tensor,
592
+ attention_mask: Optional[torch.Tensor] = None,
593
+ position_ids: Optional[torch.LongTensor] = None,
594
+ past_key_value: Optional[Tuple[torch.Tensor]] = None,
595
+ output_attentions: Optional[bool] = False,
596
+ use_cache: Optional[bool] = False,
597
+ im_mask: Optional[Tuple[torch.Tensor]] = None,
598
+ **kwargs,
599
+ ) -> Tuple[torch.FloatTensor, Optional[Tuple[torch.FloatTensor,
600
+ torch.FloatTensor]]]:
601
+ """
602
+ Args:
603
+ hidden_states (`torch.FloatTensor`): input to the layer of shape `(batch, seq_len, embed_dim)`
604
+ attention_mask (`torch.FloatTensor`, *optional*):
605
+ attention mask of size `(batch_size, sequence_length)` if flash attention is used or `(batch_size, 1,
606
+ query_sequence_length, key_sequence_length)` if default attention is used.
607
+ output_attentions (`bool`, *optional*):
608
+ Whether or not to return the attentions tensors of all attention layers. See `attentions` under
609
+ returned tensors for more detail.
610
+ use_cache (`bool`, *optional*):
611
+ If set to `True`, `past_key_values` key value states are returned and can be used to speed up decoding
612
+ (see `past_key_values`).
613
+ past_key_value (`Tuple(torch.FloatTensor)`, *optional*): cached past key and value projection states
614
+ """
615
+ if 'padding_mask' in kwargs:
616
+ warnings.warn(
617
+ 'Passing `padding_mask` is deprecated and will be removed in v4.37. '
618
+ 'Please make sure use `attention_mask` instead.`')
619
+
620
+ residual = hidden_states
621
+
622
+ hidden_states = self.attention_norm(hidden_states)
623
+
624
+ # Self Attention
625
+ hidden_states, self_attn_weights, present_key_value = self.attention(
626
+ hidden_states=hidden_states,
627
+ attention_mask=attention_mask,
628
+ position_ids=position_ids,
629
+ past_key_value=past_key_value,
630
+ output_attentions=output_attentions,
631
+ use_cache=use_cache,
632
+ im_mask=im_mask,
633
+ **kwargs,
634
+ )
635
+ hidden_states = residual + hidden_states
636
+
637
+ # Fully Connected
638
+ residual = hidden_states
639
+ hidden_states = self.ffn_norm(hidden_states)
640
+ hidden_states = self.feed_forward(hidden_states, im_mask)
641
+ hidden_states = residual + hidden_states
642
+
643
+ outputs = (hidden_states, )
644
+
645
+ if output_attentions:
646
+ outputs += (self_attn_weights, )
647
+
648
+ if use_cache:
649
+ outputs += (present_key_value, )
650
+
651
+ return outputs
652
+
653
+
654
+ InternLM2_START_DOCSTRING = r"""
655
+ This model inherits from [`PreTrainedModel`]. Check the superclass documentation for the generic methods the
656
+ library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads
657
+ etc.)
658
+
659
+ This model is also a PyTorch [torch.nn.Module](https://pytorch.org/docs/stable/nn.html#torch.nn.Module) subclass.
660
+ Use it as a regular PyTorch Module and refer to the PyTorch documentation for all matter related to general usage
661
+ and behavior.
662
+
663
+ Parameters:
664
+ config ([`InternLM2Config`]):
665
+ Model configuration class with all the parameters of the model. Initializing with a config file does not
666
+ load the weights associated with the model, only the configuration. Check out the
667
+ [`~PreTrainedModel.from_pretrained`] method to load the model weights.
668
+ """
669
+
670
+
671
+ @add_start_docstrings(
672
+ 'The bare InternLM2 Model outputting raw hidden-states without any specific head on top.',
673
+ InternLM2_START_DOCSTRING,
674
+ )
675
+ class InternLM2PreTrainedModel(PreTrainedModel):
676
+ config_class = InternLM2Config
677
+ base_model_prefix = 'model'
678
+ supports_gradient_checkpointing = True
679
+ _no_split_modules = ['InternLM2DecoderLayer']
680
+ _skip_keys_device_placement = 'past_key_values'
681
+ _supports_flash_attn_2 = True
682
+
683
+ def _init_weights(self, module):
684
+ std = self.config.initializer_range
685
+ if isinstance(module, nn.Linear):
686
+ module.weight.data.normal_(mean=0.0, std=std)
687
+ if module.bias is not None:
688
+ module.bias.data.zero_()
689
+ elif isinstance(module, nn.Embedding):
690
+ module.weight.data.normal_(mean=0.0, std=std)
691
+ if module.padding_idx is not None:
692
+ module.weight.data[module.padding_idx].zero_()
693
+
694
+
695
+ InternLM2_INPUTS_DOCSTRING = r"""
696
+ Args:
697
+ input_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`):
698
+ Indices of input sequence tokens in the vocabulary. Padding will be ignored by default should you provide
699
+ it.
700
+
701
+ Indices can be obtained using [`AutoTokenizer`]. See [`PreTrainedTokenizer.encode`] and
702
+ [`PreTrainedTokenizer.__call__`] for details.
703
+
704
+ [What are input IDs?](../glossary#input-ids)
705
+ attention_mask (`torch.Tensor` of shape `(batch_size, sequence_length)`, *optional*):
706
+ Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:
707
+
708
+ - 1 for tokens that are **not masked**,
709
+ - 0 for tokens that are **masked**.
710
+
711
+ [What are attention masks?](../glossary#attention-mask)
712
+
713
+ Indices can be obtained using [`AutoTokenizer`]. See [`PreTrainedTokenizer.encode`] and
714
+ [`PreTrainedTokenizer.__call__`] for details.
715
+
716
+ If `past_key_values` is used, optionally only the last `input_ids` have to be input (see
717
+ `past_key_values`).
718
+
719
+ If you want to change padding behavior, you should read [`modeling_opt._prepare_decoder_attention_mask`]
720
+ and modify to your needs. See diagram 1 in [the paper](https://arxiv.org/abs/1910.13461) for more
721
+ information on the default strategy.
722
+
723
+ - 1 indicates the head is **not masked**,
724
+ - 0 indicates the head is **masked**.
725
+ position_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`, *optional*):
726
+ Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0,
727
+ config.n_positions - 1]`.
728
+
729
+ [What are position IDs?](../glossary#position-ids)
730
+ past_key_values (`tuple(tuple(torch.FloatTensor))`, *optional*, returned when `use_cache=True` is passed or
731
+ when `config.use_cache=True`):
732
+ Tuple of `tuple(torch.FloatTensor)` of length `config.n_layers`, with each tuple having 2 tensors of shape
733
+ `(batch_size, num_heads, sequence_length, embed_size_per_head)`) and 2 additional tensors of shape
734
+ `(batch_size, num_heads, decoder_sequence_length, embed_size_per_head)`.
735
+
736
+ Contains pre-computed hidden-states (key and values in the self-attention blocks and in the cross-attention
737
+ blocks) that can be used (see `past_key_values` input) to speed up sequential decoding.
738
+
739
+ If `past_key_values` are used, the user can optionally input only the last `input_ids` (those that don't
740
+ have their past key value states given to this model) of shape `(batch_size, 1)` instead of all `input_ids`
741
+ of shape `(batch_size, sequence_length)`.
742
+ inputs_embeds (`torch.FloatTensor` of shape `(batch_size, sequence_length, hidden_size)`, *optional*):
743
+ Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This
744
+ is useful if you want more control over how to convert `input_ids` indices into associated vectors than the
745
+ model's internal embedding lookup matrix.
746
+ use_cache (`bool`, *optional*):
747
+ If set to `True`, `past_key_values` key value states are returned and can be used to speed up decoding (see
748
+ `past_key_values`).
749
+ output_attentions (`bool`, *optional*):
750
+ Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned
751
+ tensors for more detail.
752
+ output_hidden_states (`bool`, *optional*):
753
+ Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for
754
+ more detail.
755
+ return_dict (`bool`, *optional*):
756
+ Whether or not to return a [`~utils.ModelOutput`] instead of a plain tuple.
757
+ """
758
+
759
+
760
+ @add_start_docstrings(
761
+ 'The bare InternLM2 Model outputting raw hidden-states without any specific head on top.',
762
+ InternLM2_START_DOCSTRING,
763
+ )
764
+ class InternLM2Model(InternLM2PreTrainedModel):
765
+ """Transformer decoder consisting of *config.num_hidden_layers* layers.
766
+ Each layer is a [`InternLM2DecoderLayer`]
767
+
768
+ Args:
769
+ config: InternLM2Config
770
+ """
771
+
772
+ _auto_class = 'AutoModel'
773
+
774
+ def __init__(self, config: InternLM2Config):
775
+ super().__init__(config)
776
+ self.padding_idx = config.pad_token_id
777
+ self.vocab_size = config.vocab_size
778
+
779
+ self.tok_embeddings = nn.Embedding(config.vocab_size,
780
+ config.hidden_size,
781
+ self.padding_idx)
782
+ self.layers = nn.ModuleList([
783
+ InternLM2DecoderLayer(config)
784
+ for _ in range(config.num_hidden_layers)
785
+ ])
786
+ self.norm = InternLM2RMSNorm(
787
+ config.hidden_size, eps=config.rms_norm_eps)
788
+
789
+ self.gradient_checkpointing = False
790
+ # Initialize weights and apply final processing
791
+ self.post_init()
792
+
793
+ def get_input_embeddings(self):
794
+ return self.tok_embeddings
795
+
796
+ def set_input_embeddings(self, value):
797
+ self.tok_embeddings = value
798
+
799
+ # Copied from transformers.models.bart.modeling_bart.BartDecoder._prepare_decoder_attention_mask
800
+ def _prepare_decoder_attention_mask(self, attention_mask, input_shape,
801
+ inputs_embeds, past_key_values_length):
802
+ # create causal mask
803
+ # [bsz, seq_len] -> [bsz, 1, tgt_seq_len, src_seq_len]
804
+ combined_attention_mask = None
805
+ if input_shape[-1] > 1:
806
+ combined_attention_mask = _make_causal_mask(
807
+ input_shape,
808
+ inputs_embeds.dtype,
809
+ device=inputs_embeds.device,
810
+ past_key_values_length=past_key_values_length,
811
+ )
812
+
813
+ if attention_mask is not None:
814
+ # [bsz, seq_len] -> [bsz, 1, tgt_seq_len, src_seq_len]
815
+ expanded_attn_mask = _expand_mask(
816
+ attention_mask, inputs_embeds.dtype,
817
+ tgt_len=input_shape[-1]).to(inputs_embeds.device)
818
+ combined_attention_mask = (
819
+ expanded_attn_mask if combined_attention_mask is None else
820
+ expanded_attn_mask + combined_attention_mask)
821
+
822
+ return combined_attention_mask
823
+
824
+ @add_start_docstrings_to_model_forward(InternLM2_INPUTS_DOCSTRING)
825
+ def forward(self,
826
+ input_ids: torch.LongTensor = None,
827
+ attention_mask: Optional[torch.Tensor] = None,
828
+ position_ids: Optional[torch.LongTensor] = None,
829
+ past_key_values: Optional[List[torch.FloatTensor]] = None,
830
+ inputs_embeds: Optional[torch.FloatTensor] = None,
831
+ use_cache: Optional[bool] = None,
832
+ output_attentions: Optional[bool] = None,
833
+ output_hidden_states: Optional[bool] = None,
834
+ return_dict: Optional[bool] = None,
835
+ **kwargs) -> Union[Tuple, BaseModelOutputWithPast]:
836
+
837
+ im_mask = kwargs.get('im_mask', None)
838
+
839
+ output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions
840
+ output_hidden_states = (
841
+ output_hidden_states if output_hidden_states is not None else
842
+ self.config.output_hidden_states)
843
+ use_cache = use_cache if use_cache is not None else self.config.use_cache
844
+
845
+ return_dict = return_dict if return_dict is not None else self.config.use_return_dict
846
+
847
+ # retrieve input_ids and inputs_embeds
848
+ if input_ids is not None and inputs_embeds is not None:
849
+ raise ValueError(
850
+ 'You cannot specify both input_ids and inputs_embeds at the same time'
851
+ )
852
+ elif input_ids is not None:
853
+ batch_size, seq_length = input_ids.shape[:2]
854
+ elif inputs_embeds is not None:
855
+ batch_size, seq_length = inputs_embeds.shape[:2]
856
+ else:
857
+ raise ValueError(
858
+ 'You have to specify either input_ids or inputs_embeds')
859
+
860
+ seq_length_with_past = seq_length
861
+ past_key_values_length = 0
862
+ if past_key_values is not None:
863
+ past_key_values_length = past_key_values[0][0].shape[2]
864
+ seq_length_with_past = seq_length_with_past + past_key_values_length
865
+
866
+ if position_ids is None:
867
+ device = input_ids.device if input_ids is not None else inputs_embeds.device
868
+ position_ids = torch.arange(
869
+ past_key_values_length,
870
+ seq_length + past_key_values_length,
871
+ dtype=torch.long,
872
+ device=device)
873
+ position_ids = position_ids.unsqueeze(0)
874
+
875
+ if inputs_embeds is None:
876
+ inputs_embeds = self.tok_embeddings(input_ids)
877
+ im_mask = torch.zeros(inputs_embeds.shape[:2]).to(
878
+ inputs_embeds.device).bool()
879
+ # embed positions
880
+ if attention_mask is None:
881
+ attention_mask = torch.ones((batch_size, seq_length_with_past),
882
+ dtype=torch.bool,
883
+ device=inputs_embeds.device)
884
+ attention_mask = self._prepare_decoder_attention_mask(
885
+ attention_mask, (batch_size, seq_length), inputs_embeds,
886
+ past_key_values_length)
887
+
888
+ # embed positions
889
+ hidden_states = inputs_embeds
890
+
891
+ if self.gradient_checkpointing and self.training:
892
+ if use_cache:
893
+ logger.warning_once(
894
+ '`use_cache=True` is incompatible with gradient checkpointing. Setting `use_cache=False`...'
895
+ )
896
+ use_cache = False
897
+
898
+ # decoder layers
899
+ all_hidden_states = () if output_hidden_states else None
900
+ all_self_attns = () if output_attentions else None
901
+ next_decoder_cache = () if use_cache else None
902
+
903
+ for idx, decoder_layer in enumerate(self.layers):
904
+ if output_hidden_states:
905
+ all_hidden_states += (hidden_states, )
906
+
907
+ past_key_value = past_key_values[
908
+ idx] if past_key_values is not None else None
909
+
910
+ if self.gradient_checkpointing and self.training:
911
+
912
+ def create_custom_forward(module):
913
+
914
+ def custom_forward(*inputs):
915
+ # None for past_key_value
916
+ return module(*inputs, output_attentions, None,
917
+ im_mask)
918
+
919
+ return custom_forward
920
+
921
+ layer_outputs = torch.utils.checkpoint.checkpoint(
922
+ create_custom_forward(decoder_layer),
923
+ hidden_states,
924
+ attention_mask,
925
+ position_ids,
926
+ None,
927
+ )
928
+ else:
929
+ layer_outputs = decoder_layer(
930
+ hidden_states,
931
+ attention_mask=attention_mask,
932
+ position_ids=position_ids,
933
+ past_key_value=past_key_value,
934
+ output_attentions=output_attentions,
935
+ use_cache=use_cache,
936
+ im_mask=im_mask,
937
+ )
938
+
939
+ hidden_states = layer_outputs[0]
940
+
941
+ if use_cache:
942
+ next_decoder_cache += (
943
+ layer_outputs[2 if output_attentions else 1], )
944
+
945
+ if output_attentions:
946
+ all_self_attns += (layer_outputs[1], )
947
+
948
+ hidden_states = self.norm(hidden_states)
949
+
950
+ # add hidden states from the last decoder layer
951
+ if output_hidden_states:
952
+ all_hidden_states += (hidden_states, )
953
+
954
+ next_cache = next_decoder_cache if use_cache else None
955
+ if not return_dict:
956
+ return tuple(
957
+ v for v in
958
+ [hidden_states, next_cache, all_hidden_states, all_self_attns]
959
+ if v is not None)
960
+ return BaseModelOutputWithPast(
961
+ last_hidden_state=hidden_states,
962
+ past_key_values=next_cache,
963
+ hidden_states=all_hidden_states,
964
+ attentions=all_self_attns,
965
+ )
modeling_internlm_xcomposer2.py ADDED
@@ -0,0 +1,612 @@
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
+ # # Copyright (c) InternLM. All rights reserved.
2
+ #
3
+ # This code is based on EleutherAI's GPT-NeoX library and the GPT-NeoX
4
+ # and OPT implementations in this library. It has been modified from its
5
+ # original forms to accommodate minor architectural differences compared
6
+ # to GPT-NeoX and OPT used by the Meta AI team that trained the model.
7
+ #
8
+ # Licensed under the Apache License, Version 2.0 (the "License");
9
+ # you may not use this file except in compliance with the License.
10
+ # You may obtain a copy of the License at
11
+ #
12
+ # http://www.apache.org/licenses/LICENSE-2.0
13
+ #
14
+ # Unless required by applicable law or agreed to in writing, software
15
+ # distributed under the License is distributed on an "AS IS" BASIS,
16
+ # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17
+ # See the License for the specific language governing permissions and
18
+ # limitations under the License.
19
+ """PyTorch InternLMXComposer2 model."""
20
+ import copy
21
+ import queue
22
+ import threading
23
+ from typing import List, Optional, Tuple, Union
24
+
25
+ import torch
26
+ import torch.utils.checkpoint
27
+ from PIL import Image
28
+ from torch import nn
29
+ from torch.nn import CrossEntropyLoss
30
+ from torchvision import transforms
31
+ from torchvision.transforms.functional import InterpolationMode
32
+ from transformers.modeling_outputs import CausalLMOutputWithPast
33
+ from transformers.utils import (add_start_docstrings_to_model_forward,
34
+ replace_return_docstrings)
35
+
36
+ try:
37
+ from transformers.generation.streamers import BaseStreamer
38
+ except: # noqa # pylint: disable=bare-except
39
+ BaseStreamer = None
40
+
41
+ from .build_mlp import build_vision_projector, build_vision_tower
42
+ from .configuration_internlm_xcomposer2 import InternLMXcomposer2Config
43
+ from .modeling_internlm2 import (InternLM2_INPUTS_DOCSTRING, InternLM2Model,
44
+ InternLM2PreTrainedModel)
45
+
46
+ _CONFIG_FOR_DOC = 'InternLMXcomposer2Config'
47
+
48
+
49
+ class InternLMXComposer2ForCausalLM(InternLM2PreTrainedModel):
50
+ _auto_class = 'AutoModelForCausalLM'
51
+
52
+ _tied_weights_keys = ['output.weight']
53
+
54
+ def __init__(self, config):
55
+ super().__init__(config)
56
+ self.model = InternLM2Model(config)
57
+ self.vocab_size = config.vocab_size
58
+ self.output = nn.Linear(
59
+ config.hidden_size, config.vocab_size, bias=False)
60
+ self.tokenizer = None
61
+
62
+ self.max_length = config.max_length
63
+ print(f'Set max length to {self.max_length}')
64
+ # Initialize weights and apply final processing
65
+ self.post_init()
66
+
67
+ self.vit = build_vision_tower()
68
+ self.vision_proj = build_vision_projector()
69
+
70
+ self.vis_processor = transforms.Compose([
71
+ transforms.Resize((config.img_size, config.img_size),
72
+ interpolation=InterpolationMode.BICUBIC),
73
+ transforms.ToTensor(),
74
+ transforms.Normalize((0.48145466, 0.4578275, 0.40821073),
75
+ (0.26862954, 0.26130258, 0.27577711)),
76
+ ])
77
+
78
+ def _set_gradient_checkpointing(self, module, value=False):
79
+ if isinstance(module, InternLM2Model):
80
+ module.gradient_checkpointing = value
81
+ if value:
82
+ self.vit.vision_tower.vision_model.encoder.gradient_checkpointing = value
83
+
84
+ def get_input_embeddings(self):
85
+ return self.model.tok_embeddings
86
+
87
+ def set_input_embeddings(self, value):
88
+ self.model.tok_embeddings = value
89
+
90
+ def get_output_embeddings(self):
91
+ return self.output
92
+
93
+ def set_output_embeddings(self, new_embeddings):
94
+ self.output = new_embeddings
95
+
96
+ def set_decoder(self, decoder):
97
+ self.model = decoder
98
+
99
+ def get_decoder(self):
100
+ return self.model
101
+
102
+ def encode_text(self, text, add_special_tokens=False):
103
+ token = self.tokenizer(
104
+ text, return_tensors='pt',
105
+ add_special_tokens=add_special_tokens).input_ids.to(self.device)
106
+ embs = self.model.tok_embeddings(token)
107
+ return embs
108
+
109
+ def encode_img(self, image):
110
+ if image is None:
111
+ return None
112
+ if isinstance(image, str):
113
+ image = Image.open(image).convert('RGB')
114
+ image = self.vis_processor(image).unsqueeze(0).to(self.device)
115
+ else:
116
+ assert isinstance(image, torch.Tensor)
117
+
118
+ img_embeds, atts_img, img_target = self.img2emb(image)
119
+ return img_embeds
120
+
121
+ def img2emb(self, image):
122
+ img_embeds = self.vision_proj(self.vit(image.to(self.device)))
123
+ atts_img = torch.ones(
124
+ img_embeds.size()[:-1], dtype=torch.long).to(img_embeds.device)
125
+
126
+ img_target = torch.ones(
127
+ img_embeds.size()[:2], dtype=torch.long).to(
128
+ img_embeds.device) * -100
129
+
130
+ return img_embeds, atts_img, img_target
131
+
132
+ def prompt_wrap(self, img_embeds, prompt):
133
+ batch_size = img_embeds.shape[0]
134
+ p_before, p_after = prompt.split('<ImageHere>')
135
+ p_before_tokens = self.tokenizer(
136
+ p_before, return_tensors='pt',
137
+ add_special_tokens=True).to(img_embeds.device)
138
+
139
+ p_before_embeds = self.model.tok_embeddings(
140
+ p_before_tokens.input_ids).expand(batch_size, -1, -1)
141
+ wrapped_img_embeds = torch.cat([p_before_embeds, img_embeds], dim=1)
142
+
143
+ wrapped_atts_img = torch.ones(
144
+ wrapped_img_embeds.size()[:-1],
145
+ dtype=torch.long).to(img_embeds.device)
146
+
147
+ wrapped_target = torch.ones(
148
+ batch_size, wrapped_img_embeds.shape[1], dtype=torch.long).to(
149
+ img_embeds.device) * -100
150
+
151
+ return wrapped_img_embeds, wrapped_atts_img, wrapped_target
152
+
153
+ def text2emb(self, text, add_special=False):
154
+ to_regress_tokens = self.tokenizer(
155
+ text,
156
+ return_tensors='pt',
157
+ padding='longest',
158
+ truncation=True,
159
+ max_length=self.max_length,
160
+ add_special_tokens=add_special).to(self.device)
161
+
162
+ targets = self.mask_human_targets(to_regress_tokens.input_ids)
163
+ targets = targets.to(self.device)
164
+ return to_regress_tokens, targets
165
+
166
+ def interleav_wrap_chat(self, tokenizer, query, image, history, meta_instruction):
167
+ prompt = ''
168
+ if meta_instruction:
169
+ prompt += f"""[UNUSED_TOKEN_146]system\n{meta_instruction}[UNUSED_TOKEN_145]\n"""
170
+ for record in history:
171
+ prompt += f"""[UNUSED_TOKEN_146]user\n{record[0]}[UNUSED_TOKEN_145]\n[UNUSED_TOKEN_146]assistant\n{record[1]}[UNUSED_TOKEN_145]\n"""
172
+ prompt += f"""[UNUSED_TOKEN_146]user\n{query}[UNUSED_TOKEN_145]\n[UNUSED_TOKEN_146]assistant\n"""
173
+
174
+ im_len = image.shape[1]
175
+ image_nums = len(image)
176
+ parts = prompt.split('<ImageHere>')
177
+ wrap_embeds, wrap_im_mask = [], []
178
+ temp_len = 0
179
+
180
+ if len(parts) != image_nums + 1:
181
+ raise ValueError('Invalid <ImageHere> prompt format.')
182
+
183
+ for idx, part in enumerate(parts):
184
+ if len(part) > 0:
185
+ part_tokens = tokenizer(part, return_tensors='pt').to(self.device)
186
+ part_embeds = self.model.tok_embeddings(
187
+ part_tokens.input_ids)
188
+ wrap_embeds.append(part_embeds)
189
+ wrap_im_mask.append(torch.zeros(part_embeds.shape[:2]))
190
+ temp_len += part_embeds.shape[1]
191
+ if idx < image_nums:
192
+ wrap_embeds.append(image[idx].unsqueeze(0))
193
+ wrap_im_mask.append(torch.ones(1, image[idx].shape[0]))
194
+ temp_len += im_len
195
+
196
+ if temp_len > self.max_length:
197
+ break
198
+
199
+ wrap_embeds = torch.cat(wrap_embeds, dim=1)
200
+ wrap_im_mask = torch.cat(wrap_im_mask, dim=1)
201
+ wrap_embeds = wrap_embeds[:, :self.max_length].to(self.device)
202
+ wrap_im_mask = wrap_im_mask[:, :self.max_length].to(self.device).bool()
203
+ inputs = {
204
+ 'inputs_embeds': wrap_embeds
205
+ }
206
+ return inputs, wrap_im_mask
207
+
208
+ def interleav_wrap(self, img_list, text_list):
209
+ wrap_embeds_list, wrap_atts_list = [], []
210
+ wrap_target_list, wrap_im_mask_list = [], []
211
+
212
+ for image, text in zip(img_list, text_list):
213
+ img_embeds, atts_img, img_target = self.img2emb(image)
214
+ text = text[0]
215
+ parts = text.split('<ImageHere>')
216
+ wrap_tokens, wrap_embeds, wrap_atts, wrap_im_mask = [], [], [], []
217
+ temp_len = 0
218
+ image_nums, im_len = img_embeds.shape[:2]
219
+ need_bos = True
220
+ for idx, part in enumerate(parts):
221
+ if len(part) > 0:
222
+ part_tokens = self.tokenizer(
223
+ part,
224
+ return_tensors='pt',
225
+ padding='longest',
226
+ add_special_tokens=need_bos).to(self.device)
227
+ if need_bos:
228
+ need_bos = False
229
+ wrap_tokens.append(part_tokens.input_ids)
230
+ part_embeds = self.model.tok_embeddings(
231
+ part_tokens.input_ids)
232
+ wrap_embeds.append(part_embeds)
233
+ wrap_atts.append(part_tokens.attention_mask)
234
+ wrap_im_mask.append(
235
+ torch.zeros(part_embeds.shape[:2]).to(self.device))
236
+
237
+ temp_len += part_embeds.shape[1]
238
+ if idx < image_nums:
239
+ wrap_tokens.append(img_target[idx].unsqueeze(0))
240
+ wrap_embeds.append(img_embeds[idx].unsqueeze(0))
241
+ wrap_atts.append(atts_img[idx].unsqueeze(0))
242
+ wrap_im_mask.append(
243
+ torch.ones_like(atts_img[idx].unsqueeze(0)))
244
+
245
+ temp_len += im_len
246
+ if temp_len > self.max_length:
247
+ break
248
+
249
+ wrap_tokens = torch.cat(wrap_tokens, dim=1)
250
+ wrap_embeds = torch.cat(wrap_embeds, dim=1)
251
+ wrap_atts = torch.cat(wrap_atts, dim=1)
252
+ wrap_im_mask = torch.cat(wrap_im_mask, dim=1)
253
+
254
+ wrap_target = self.mask_human_targets(wrap_tokens).to(self.device)
255
+
256
+ wrap_embeds = wrap_embeds[:, :self.max_length].to(self.device)
257
+ wrap_atts = wrap_atts[:, :self.max_length].to(self.device)
258
+ wrap_target = wrap_target[:, :self.max_length].to(self.device)
259
+ wrap_im_mask = wrap_im_mask[:, :self.max_length].to(self.device)
260
+
261
+ wrap_embeds_list.append(wrap_embeds)
262
+ wrap_atts_list.append(wrap_atts)
263
+ wrap_target_list.append(wrap_target)
264
+ wrap_im_mask_list.append(wrap_im_mask)
265
+
266
+ wrap_embeds = torch.cat(wrap_embeds_list)
267
+ wrap_atts = torch.cat(wrap_atts_list)
268
+ wrap_target = torch.cat(wrap_target_list)
269
+ wrap_im_mask = torch.cat(wrap_im_mask_list)
270
+ return wrap_embeds, wrap_atts, wrap_target, wrap_im_mask
271
+
272
+ def mask_human_targets(self, input_ids, pure=False):
273
+ target_batch = []
274
+ for bs in range(input_ids.shape[0]):
275
+ ids = input_ids[bs]
276
+ targets = copy.deepcopy(ids)
277
+ end_count = 0
278
+ last_eoa = 0
279
+ for i, temp_id in enumerate(ids):
280
+ if temp_id == 92542:
281
+ if end_count % 2 == 0:
282
+ targets[last_eoa:i + 6] = -100
283
+ else:
284
+ last_eoa = i + 1
285
+ end_count += 1
286
+ # # eos and following pad
287
+ elif temp_id == 2:
288
+ # loss on eos, but not on pad
289
+ targets[i + 1:] = -100
290
+ break
291
+ # trunction, end at last question
292
+ if temp_id != 2 and end_count % 2 == 0:
293
+ # mask all after the last answer
294
+ targets[last_eoa + 1:] = -100
295
+ target_batch.append(targets.unsqueeze(0))
296
+ target_batch = torch.cat(target_batch, dim=0)
297
+ return target_batch
298
+
299
+ @add_start_docstrings_to_model_forward(InternLM2_INPUTS_DOCSTRING)
300
+ @replace_return_docstrings(
301
+ output_type=CausalLMOutputWithPast, config_class=_CONFIG_FOR_DOC)
302
+ def forward(self,
303
+ input_ids: torch.LongTensor = None,
304
+ attention_mask: Optional[torch.Tensor] = None,
305
+ position_ids: Optional[torch.LongTensor] = None,
306
+ past_key_values: Optional[List[torch.FloatTensor]] = None,
307
+ inputs_embeds: Optional[torch.FloatTensor] = None,
308
+ labels: Optional[torch.LongTensor] = None,
309
+ use_cache: Optional[bool] = None,
310
+ output_attentions: Optional[bool] = None,
311
+ output_hidden_states: Optional[bool] = None,
312
+ return_dict: Optional[bool] = None,
313
+ **kwargs) -> Union[Tuple, CausalLMOutputWithPast]:
314
+ r"""
315
+ Args:
316
+ labels (`torch.LongTensor` of shape `(batch_size, sequence_length)`, *optional*):
317
+ Labels for computing the masked language modeling loss. Indices should either be in `[0, ...,
318
+ config.vocab_size]` or -100 (see `input_ids` docstring). Tokens with indices set to `-100` are ignored
319
+ (masked), the loss is only computed for the tokens with labels in `[0, ..., config.vocab_size]`.
320
+ Returns:
321
+ """
322
+
323
+ samples = kwargs.get('samples', None)
324
+ if samples:
325
+ if samples['data_type'][0] == 'text':
326
+ has_img = False
327
+ elif samples['data_type'][0] == 'multi':
328
+ has_img = True
329
+ else:
330
+ raise NotImplementedError
331
+
332
+ # encode text
333
+ text = samples['text_input']
334
+ # encode image
335
+ if has_img:
336
+ image = samples['image']
337
+ to_regress_embeds, attention_mask, targets, im_mask = self.interleav_wrap(
338
+ image, text)
339
+ else:
340
+ to_regress_tokens, targets = self.text2emb(
341
+ text, add_special=True)
342
+ to_regress_embeds = self.model.tok_embeddings(
343
+ to_regress_tokens.input_ids)
344
+ attention_mask = to_regress_tokens.attention_mask
345
+ im_mask = torch.zeros(to_regress_embeds.shape[:2]).cuda()
346
+
347
+ inputs_embeds = to_regress_embeds[:, :self.max_length]
348
+ attention_mask = attention_mask[:, :self.max_length]
349
+ targets = targets[:, :self.max_length]
350
+ im_mask = im_mask[:, :self.max_length].bool()
351
+ labels = targets
352
+ else:
353
+ im_mask = kwargs.get('im_mask', None)
354
+ if im_mask is None and inputs_embeds is not None:
355
+ im_mask = torch.zeros(inputs_embeds.shape[:2]).to(
356
+ inputs_embeds.device)
357
+ im_mask = im_mask.bool()
358
+
359
+ output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions
360
+ output_hidden_states = (
361
+ output_hidden_states if output_hidden_states is not None else
362
+ self.config.output_hidden_states)
363
+ return_dict = return_dict if return_dict is not None else self.config.use_return_dict
364
+
365
+ # decoder outputs consists of (dec_features, layer_state, dec_hidden, dec_attn)
366
+ outputs = self.model(
367
+ input_ids=input_ids,
368
+ attention_mask=attention_mask,
369
+ position_ids=position_ids,
370
+ past_key_values=past_key_values,
371
+ inputs_embeds=inputs_embeds,
372
+ use_cache=use_cache,
373
+ output_attentions=output_attentions,
374
+ output_hidden_states=output_hidden_states,
375
+ return_dict=return_dict,
376
+ im_mask=im_mask,
377
+ )
378
+
379
+ hidden_states = outputs[0]
380
+ logits = self.output(hidden_states)
381
+ logits = logits.float()
382
+
383
+ loss = None
384
+ if labels is not None:
385
+ # Shift so that tokens < n predict n
386
+ shift_logits = logits[..., :-1, :].contiguous()
387
+ shift_labels = labels[..., 1:].contiguous()
388
+ # Flatten the tokens
389
+ loss_fct = CrossEntropyLoss()
390
+ shift_logits = shift_logits.view(-1, self.config.vocab_size)
391
+ shift_labels = shift_labels.view(-1)
392
+ # Enable model parallelism
393
+ shift_labels = shift_labels.to(shift_logits.device)
394
+ loss = loss_fct(shift_logits, shift_labels)
395
+
396
+ if not return_dict:
397
+ output = (logits, ) + outputs[1:]
398
+ return (loss, ) + output if loss is not None else output
399
+
400
+ return CausalLMOutputWithPast(
401
+ loss=loss,
402
+ logits=logits,
403
+ past_key_values=outputs.past_key_values,
404
+ hidden_states=outputs.hidden_states,
405
+ attentions=outputs.attentions,
406
+ )
407
+
408
+ def prepare_inputs_for_generation(self,
409
+ input_ids,
410
+ past_key_values=None,
411
+ attention_mask=None,
412
+ inputs_embeds=None,
413
+ im_mask=None,
414
+ **kwargs):
415
+ if past_key_values is not None:
416
+ past_length = past_key_values[0][0].shape[2]
417
+
418
+ # Some generation methods already pass only the last input ID
419
+ if input_ids.shape[1] > past_length:
420
+ remove_prefix_length = past_length
421
+ else:
422
+ # Default to old behavior: keep only final ID
423
+ remove_prefix_length = input_ids.shape[1] - 1
424
+
425
+ input_ids = input_ids[:, remove_prefix_length:]
426
+
427
+ position_ids = kwargs.get('position_ids', None)
428
+ if attention_mask is not None and position_ids is None:
429
+ # create position_ids on the fly for batch generation
430
+ position_ids = attention_mask.long().cumsum(-1) - 1
431
+ position_ids.masked_fill_(attention_mask == 0, 1)
432
+ if past_key_values:
433
+ position_ids = position_ids[:, -input_ids.shape[1]:]
434
+
435
+ # if `inputs_embeds` are passed, we only want to use them in the 1st generation step
436
+ if inputs_embeds is not None and past_key_values is None:
437
+ model_inputs = {'inputs_embeds': inputs_embeds}
438
+ else:
439
+ model_inputs = {'input_ids': input_ids}
440
+
441
+ im_mask = im_mask
442
+
443
+ model_inputs.update({
444
+ 'position_ids': position_ids,
445
+ 'past_key_values': past_key_values,
446
+ 'use_cache': kwargs.get('use_cache'),
447
+ 'attention_mask': attention_mask,
448
+ 'im_mask': im_mask,
449
+ })
450
+ return model_inputs
451
+
452
+ @staticmethod
453
+ def _reorder_cache(past_key_values, beam_idx):
454
+ reordered_past = ()
455
+ for layer_past in past_key_values:
456
+ reordered_past += (tuple(
457
+ past_state.index_select(0, beam_idx.to(past_state.device))
458
+ for past_state in layer_past), )
459
+ return reordered_past
460
+
461
+ def build_inputs(self,
462
+ tokenizer,
463
+ query: str,
464
+ history: List[Tuple[str, str]] = [],
465
+ meta_instruction=''):
466
+ prompt = ''
467
+ if meta_instruction:
468
+ prompt += f"""<s>[UNUSED_TOKEN_146]system\n{meta_instruction}[UNUSED_TOKEN_145]\n"""
469
+ else:
470
+ prompt += '<s>'
471
+ for record in history:
472
+ prompt += f"""[UNUSED_TOKEN_146]user\n{record[0]}[UNUSED_TOKEN_145]\n[UNUSED_TOKEN_146]assistant\n{record[1]}[UNUSED_TOKEN_145]\n"""
473
+ prompt += f"""[UNUSED_TOKEN_146]user\n{query}[UNUSED_TOKEN_145]\n[UNUSED_TOKEN_146]assistant\n"""
474
+ return tokenizer([prompt], return_tensors='pt')
475
+
476
+ @torch.no_grad()
477
+ def chat(
478
+ self,
479
+ tokenizer,
480
+ query: str,
481
+ image: torch.Tensor = None,
482
+ history: List[Tuple[str, str]] = [],
483
+ streamer: Optional[BaseStreamer] = None,
484
+ max_new_tokens: int = 1024,
485
+ do_sample: bool = True,
486
+ temperature: float = 1.0,
487
+ top_p: float = 0.8,
488
+ repetition_penalty: float=1.005,
489
+ meta_instruction:
490
+ str = 'You are an AI assistant whose name is InternLM-XComposer (浦语·灵笔).\n'
491
+ '- InternLM-XComposer (浦语·灵笔) is a multi-modality conversational language model that is developed by Shanghai AI Laboratory (上海人工智能实验室). It is designed to be helpful, honest, and harmless.\n'
492
+ '- InternLM-XComposer (浦语·灵笔) can understand and communicate fluently in the language chosen by the user such as English and 中文.\n'
493
+ '- InternLM-XComposer (浦语·灵笔) is capable of comprehending and articulating responses effectively based on the provided image.',
494
+ **kwargs,
495
+ ):
496
+ if image is None:
497
+ inputs = self.build_inputs(tokenizer, query, history, meta_instruction)
498
+ im_mask = torch.zeros(inputs['input_ids'].shape[:2]).cuda().bool()
499
+ else:
500
+ image = self.encode_img(image)
501
+ inputs, im_mask = self.interleav_wrap_chat(tokenizer, query, image, history, meta_instruction)
502
+ inputs = {
503
+ k: v.to(self.device)
504
+ for k, v in inputs.items() if torch.is_tensor(v)
505
+ }
506
+ # also add end-of-assistant token in eos token id to avoid unnecessary generation
507
+ eos_token_id = [
508
+ tokenizer.eos_token_id,
509
+ tokenizer.convert_tokens_to_ids(['[UNUSED_TOKEN_145]'])[0]
510
+ ]
511
+ outputs = self.generate(
512
+ **inputs,
513
+ streamer=streamer,
514
+ max_new_tokens=max_new_tokens,
515
+ do_sample=do_sample,
516
+ temperature=temperature,
517
+ top_p=top_p,
518
+ eos_token_id=eos_token_id,
519
+ repetition_penalty=repetition_penalty,
520
+ im_mask=im_mask,
521
+ **kwargs,
522
+ )
523
+ if image is None:
524
+ outputs = outputs[0].cpu().tolist()[len(inputs['input_ids'][0]):]
525
+ else:
526
+ outputs = outputs[0].cpu().tolist()
527
+ response = tokenizer.decode(outputs, skip_special_tokens=True)
528
+ response = response.split('[UNUSED_TOKEN_145]')[0]
529
+ history = history + [(query, response)]
530
+ return response, history
531
+
532
+ @torch.no_grad()
533
+ def stream_chat(
534
+ self,
535
+ tokenizer,
536
+ query: str,
537
+ history: List[Tuple[str, str]] = [],
538
+ max_new_tokens: int = 1024,
539
+ do_sample: bool = True,
540
+ temperature: float = 0.8,
541
+ top_p: float = 0.8,
542
+ **kwargs,
543
+ ):
544
+ """Return a generator in format: (response, history) Eg.
545
+
546
+ ('你好,有什么可以帮助您的吗', [('你好', '你好,有什么可以帮助您的吗')]) ('你好,有什么可以帮助您的吗?', [('你好',
547
+ '你好,有什么可以帮助您的吗?')])
548
+ """
549
+ if BaseStreamer is None:
550
+ raise ModuleNotFoundError(
551
+ 'The version of `transformers` is too low. Please make sure '
552
+ 'that you have installed `transformers>=4.28.0`.')
553
+
554
+ response_queue = queue.Queue(maxsize=20)
555
+
556
+ class ChatStreamer(BaseStreamer):
557
+
558
+ def __init__(self, tokenizer) -> None:
559
+ super().__init__()
560
+ self.tokenizer = tokenizer
561
+ self.queue = response_queue
562
+ self.query = query
563
+ self.history = history
564
+ self.response = ''
565
+ self.received_inputs = False
566
+ self.queue.put(
567
+ (self.response, history + [(self.query, self.response)]))
568
+
569
+ def put(self, value):
570
+ if len(value.shape) > 1 and value.shape[0] > 1:
571
+ raise ValueError('ChatStreamer only supports batch size 1')
572
+ elif len(value.shape) > 1:
573
+ value = value[0]
574
+
575
+ if not self.received_inputs:
576
+ # The first received value is input_ids, ignore here
577
+ self.received_inputs = True
578
+ return
579
+
580
+ token = self.tokenizer.decode([value[-1]],
581
+ skip_special_tokens=True)
582
+ if token.strip() != '[UNUSED_TOKEN_145]':
583
+ self.response = self.response + token
584
+ history = self.history + [(self.query, self.response)]
585
+ self.queue.put((self.response, history))
586
+
587
+ def end(self):
588
+ self.queue.put(None)
589
+
590
+ def stream_producer():
591
+ return self.chat(
592
+ tokenizer=tokenizer,
593
+ query=query,
594
+ streamer=ChatStreamer(tokenizer=tokenizer),
595
+ history=history,
596
+ max_new_tokens=max_new_tokens,
597
+ do_sample=do_sample,
598
+ temperature=temperature,
599
+ top_p=top_p,
600
+ **kwargs,
601
+ )
602
+
603
+ def consumer():
604
+ producer = threading.Thread(target=stream_producer)
605
+ producer.start()
606
+ while True:
607
+ res = response_queue.get()
608
+ if res is None:
609
+ return
610
+ yield res
611
+
612
+ return consumer()