GitHub - Cooperx521/PyramidDrop: (CVPR 2025) PyramidDrop: Accelerating Your Large Vision-Language Models via Pyramid Visual Redundancy Reduction (original) (raw)
PyramidDrop: Accelerating Your Large Vision-Language Models via Pyramid Visual Redundancy Reduction (CVPR 2025)
π― News
[2025.3.6] [Updateπ₯] Please place any models that need to be compatible with pdrop in this issue
[2025.2.27] π Our paper has been accepted by CVPR 2025!!!
[2024.10.24] π Our paper has been featured as #1 Paper of the day on HuggingFace Daily Papers.
[2024.10.23] π We release the paper at ArXiv and Huggingface!
π‘ Highlights
- π₯ Increasing Redundancy: We find that redundancy of image tokens is relatively minimal in the shallow layers and becomes progressively larger in deeper layers.
- π₯ Efficient Training: PyramidDrop can achieve a 40% training time and 55% inference FLOPs acceleration of LLaVA-NeXT with comparable performance.
- π₯ Efficient Inference: PyramidDrop could also serve as a plug-and-play strategy for inference acceleration without training, with better performance and lower inference cost than counterparts.
- π₯ High Compatibility: Our codebase support flash_attention_2, sdpa and eager attention pattern, and it can be easily migrated to different versions of Transformers.
π¨βπ» Todo
- Release the PDrop evaluation and training code of llava1.5
- Release the PDrop evaluation and training code of llava-next
- Support kv cache
- Support video llava
- Further simplify the code to facilitate migration to Qwen and different versions of Transformer.
π§ Install
- Clone this repository and navigate to PyramidDrop folder
git clone https://github.com/Cooperx521/PyramidDrop.git
cd PyramidDrop
- Install Package
conda create -n pdrop python=3.10 -y
conda activate pdrop
pip install --upgrade pip # enable PEP 660 support
pip install -e .
- Install additional packages for training
pip install -e ".[train]"
pip install flash-attn --no-build-isolation
βοΈ Quick Start
1. Core Implementation
The main implementation of PyramidDrop is in llava/model/modeling_llama_pdrop.py. The efficient forward process of LLM with PyramidDrop is in function pdrop_forward, and Rank & Drop is implemented in function pdrop_rank_drop. To prepare for PyramidDrop, the function prepare_inputs_labels_for_multimodal_pdrop collects the following parameters: the length of the text, the image placeholder position, and the number of image tokens. The length of the text is used only during inference to determine the position of the last instruction token. The entire multimodal forward process is encapsulated within the LlavaLlamaForCausalLM_PDrop class.
2. Compatibility
The current code implementation is based on transformers-4.37.2. If you want to run it on other versions of transformers, you only need to find modeling_llama.py and make some simple modifications. This includes adjusting the pdrop_forward and pdrop_rank_drop functions according to the specific transformer version.
If you want to use PyramidDrop on your own model, and if the LLM is based on llama, you can directly add these functions based on Core Implementation to run it easily. If the LLM is not based on llama, you will need to adjust these functions according to the forward function of your LLM.
Efficient Training
We can use PyramidDrop during the training process of LLaVA and Open-LLaVA-NeXT. Firstly, please prepare the data of pretraining and finetuning following the instructions of the two repositories above. Then you can directly use PyramidDrop to reduce training cost, code can be found in scripts/v1_5/pdrop_train and scripts/v1_6/pdrop_train.
Options to note:
--layer_list '[8,16,24]': the layers after which we apply rank & drop.--image_token_ratio_list "[0.5,0.25,0.125]": denote the image tokens ratio we retain at different stage, and this represents we obtain 50%, 25%, 12.5% after layer8, layer16, layer24. In this case, we have divided the forward pass into 4 stages, and Ξ» = 0.5.
Efficient Inference
We follow the original evaluation in LLaVA for most of benchmarks. For MMStar, DocVQA, InfoVQA, ChartQA OCRVQA we use VLMEvalKit.
See Evaluation.md to prepare for inference.
If you want to use PyramidDrop to operate efficient inference on original llava1.5 and llava-next, evaluation code can be found in scripts/v1_5/pdrop_eval and scripts/v1_6/pdrop_eval.
β€οΈ Acknowledgments
- LLaVA: the codebase we built upon. Thanks for their brilliant contributions to the community.
- Open-LLaVA-NeXT: Thanks for the impressive open-source implementation of LLaVA-NeXT series.
- VLMEvalKit: the amazing open-sourced suit for evaluating various LMMs!