add SDXL model example to INC 3.x

examples/.config/model_params_pytorch_3x.json

@@ -147,6 +147,13 @@
         "main_script": "run_clm_no_trainer.py",
         "batch_size": 1
       },
+      "sdxl_ipex_sq":{
+        "model_src_dir": "diffusion_model/diffusers/stable_diffusion/smooth_quant",
+        "dataset_location": "",
+        "input_model": "",
+        "main_script": "main.py",
+        "batch_size": 1
+      },
       "resnet18_mixed_precision": {
         "model_src_dir": "cv/mixed_precision",
         "dataset_location": "/tf_dataset/pytorch/ImageNet/raw",

examples/3.x_api/pytorch/diffusion_model/diffusers/stable_diffusion/smooth_quant/README.md

@@ -0,0 +1,83 @@
+Step-by-Step
+============
+This document describes the step-by-step instructions to run [stable diffusion XL model](https://huggingface.co/stabilityai/stable-diffusion-xl-base-1.0) using Smooth Quantization to accelerate inference while maintain the quality of output image.
+
+# Prerequisite
+
+## Environment
+Recommend python 3.9 or higher version.
+
+```shell
+pip install -r requirements.txt
+```
+**Note**: IPEX along with torch require nightly version (2.4) for compatibility. Please refer to [installation](https://intel.github.io/intel-extension-for-pytorch/index.html#installation?platform=cpu&version=main&os=linux%2fwsl2&package=source). 
+
+# Run
+
+To quantize the model:
+```bash
+python sdxl_smooth_quant.py --model_name_or_path stabilityai/stable-diffusion-xl-base-1.0 --quantize --alpha 0.44 --output_dir "./saved_results"
+```
+or
+```bash
+sh run_quant.sh --alpha=0.44
+```
+To load a quantized model:
+```bash
+python sdxl_smooth_quant.py --model_name_or_path stabilityai/stable-diffusion-xl-base-1.0 --quantize --load --int8
+```
+or
+```bash
+sh run_quant.sh --int8=true
+```
+
+# Results
+## Image Generated
+
+With caption `"A brown and white dog runs on some brown grass near a Frisbee that is just sailing above the ground."`, results of fp32 model and int8 model are listed left and right respectively.
+
+<p float="left">
+  <img src="./images/fp32.jpg" width = "300" height = "300" alt="bf16" align=center />
+  <img src="./images/int8.jpg" width = "300" height = "300" alt="int8" align=center />
+</p>
+
+## CLIP evaluation
+We have also evaluated CLIP scores on 5000 samples from COCO2014 validation dataset for FP32 model and INT8 model. CLIP results are listed below.
+
+| Precision            | FP32  | INT8  | 
+|----------------------|-------|-------|
+| CLIP on COCO2014 val  | 32.05 | 31.77 |
+
+We're using the mlperf_sd_inference [repo](https://github.com/ahmadki/mlperf_sd_inference) to evaluate CLIP scores. In order to support evaluation on quantized model,
+we made some modification on the script (`main.py`). Please use as following:
+```bash
+git clone https://github.com/ahmadki/mlperf_sd_inference.git
+cd mlperf_sd_inference
+mv ../main.py ./
+```
+After setting the environment as instructed in the repo, you can execute the modified `main.py` script to generate images:
+```bash
+python main.py \
+    --model-id stabilityai/stable-diffusion-xl-base-1.0 \
+    --quantized-unet ./saved_results \  # quantized model saving path, should include `qconfig.json` and `quantized_model.pt`
+    --precision fp32 \ 
+    --guidance 8.0 \
+    --steps 20 \
+    --iters 200 \  # change to 5000 for the full 5k dataset
+    --latent-path latents.pt \
+    --base-output-dir ./output
+```
+Then you can compute CLIP score using the images generated by the quantized model:
+```bash
+mv ./output/stabilityai--stable-diffusion-xl-base-1.0__euler__20__8.0__fp32/* ./output/  # switch directory
+rm -rf ./output/stabilityai--stable-diffusion-xl-base-1.0__euler__20__8.0__fp32/
+
+python clip/clip_score.py \
+    --tsv-file captions_5k.tsv \
+    --image-folder ./output \  # folder with the generated images
+    --device "cpu"     
+```
+Or you can use the bash script for all steps above:
+```bash
+sh run_benchmark.sh --mode=accuracy --int8=true
+```