Add vlm examples, bugfix

examples/3.x_api/pytorch/multimodal-modeling/quantization/auto_round/Llava/README.md

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+
+Step-by-Step
+============
+This document describes the step-by-step instructions to run [VLM quantization for Llava](https://huggingface.co/liuhaotian/llava-v1.5-7b) using AutoRound Quantization.
+
+# Run Quantization on Multimodal Models
+
+In this example, we introduce an straight-forward way to execute quantization on some popular multimodal models such as LLaVA. 
+
+Please note that LLAVA quantized model is currently only support inference with **auto_round** format.
+
+## Install
+If you are not using Linux, do NOT proceed, see instructions for [macOS](https://github.com/haotian-liu/LLaVA/blob/main/docs/macOS.md) and [Windows](https://github.com/haotian-liu/LLaVA/blob/main/docs/Windows.md).
+
+1. Clone this repository and navigate to LLaVA folder
+```shell
+git clone https://github.com/haotian-liu/LLaVA.git
+cd LLaVA
+```
+
+2. Install Package
+```
+pip install --upgrade pip  # enable PEP 660 support
+pip install -e .
+```
+
+## Download the calibration/Evaluation data
+
+Our calibration process resembles the official visual instruction tuning process. To align the official implementation of [LLaVA](https://github.com/haotian-liu/LLaVA/tree/main?tab=readme-ov-file#visual-instruction-tuning)
+
+Please download the annotation of the final mixture our instruction tuning data [llava_v1_5_mix665k.json](https://huggingface.co/datasets/liuhaotian/LLaVA-Instruct-150K/blob/main/llava_v1_5_mix665k.json), and download the images from constituting datasets:
+
+COCO: [train2017](http://images.cocodataset.org/zips/train2017.zip), and unzip the image folder to any directory you desire.
+
+Please refer to [llava_eval_datasets](https://github.com/haotian-liu/LLaVA/blob/main/docs/Evaluation.md#scripts) to download the textVQA dataset for evaluation usage
+
+<br />
+
+## 2. Run Examples
+Enter into the examples folder and install requirements
+
+```bash
+pip install -r requirements.txt
+```
+
+- **Default Settings:**
+```bash
+CUDA_VISIBLE_DEVICES=0 python3 main.py --model_name liuhaotian/llava-v1.5-7b  --bits 4 --group_size 128 --quantize
+```
+
+## 3. Results
+Using [COCO 2017](https://cocodataset.org/) and [LLaVA-Instruct-150K](https://huggingface.co/datasets/liuhaotian/LLaVA-Instruct-150K) datasets for quantization calibration, and TextVQA dataset for evaluation. When the vision components are not involved in quantization, it is able to achieve accuracy loss within 1%. The results for fake quantized LLava-7b are as follows:
+| Model | Config | Precision | Hyperparameter | Accuracy% | Relative drop |
+|  :----: | :----: | :----: | :----: | :----: | :----: |
+| liuhaotian/llava-v1.5-7b | - | FP16 | - | 58.21 | - |
+| liuhaotian/llava-v1.5-7b | W4G128 | FP16 | with vision | 56.39 | -3.13% |
+| liuhaotian/llava-v1.5-7b | W4G128 | FP16 | w/o vision | 58.08 | -0.22% |
+
+
+## 4. Known Issues
+* huggingface format model is not support yet, e.g. llava-1.5-7b-hf
+* Setting seqlen to 2048 is not working yet.
+
+
+## 5. Environment
+
+PyTorch 1.8 or higher version is needed
+
+
+## Reference
+If you find SignRound useful for your research, please cite our paper:
+```bash
+@article{cheng2023optimize,
+  title={Optimize Weight Rounding via Signed Gradient Descent for the Quantization of LLMs},
+  author={Cheng, Wenhua and Zhang, Weiwei and Shen, Haihao and Cai, Yiyang and He, Xin and Lv, Kaokao},
+  journal={arXiv preprint arXiv:2309.05516},
+  year={2023}
+}
+```
+
+
+