diff --git a/multimodal/diffusion/stable-diffusion/diffusers/README.md b/multimodal/diffusion/stable-diffusion/diffusers/README.md new file mode 100644 index 0000000000000000000000000000000000000000..56c70a0ab3bacc9e912c4412f65841bade47264a --- /dev/null +++ b/multimodal/diffusion/stable-diffusion/diffusers/README.md @@ -0,0 +1,71 @@ +# Stable Diffusion + +## Model description + +Stable Diffusion is a latent text-to-image diffusion model. + +## Step 1: Installation + +- Install +```bash +wget http://files.deepspark.org.cn:880/deepspark/add-ons/deepspeed-0.14.3+corex.20240718020249-cp310-cp310-linux_x86_64.whl +wget http://files.deepspark.org.cn:880/deepspark/add-ons/diffusers-0.22.0-py3-none-any.whl +wget http://files.deepspark.org.cn:880/deepspark/add-ons/transformers-4.38.1-py3-none-any.whl +``` +```bash +pip3 install deepspeed-0.14.3+corex.20240718020249-cp310-cp310-linux_x86_64.whl +pip3 install diffusers-0.22.0-py3-none-any.whl +pip3 install transformers-4.38.1-py3-none-any.whl +pip3 install -r requirements.txt +pip3 install pillow --upgrade +``` + + +## Step 2: Preparing datasets +You just need to run the script, and it will automatically download the required data and weights. Or you can manually download the weights and data locally. + +dataset: download the lambdalabs/pokemon-blip-captions from [huggingface page](https://huggingface.co/datasets/lambdalabs/pokemon-blip-captions). + +weights: download the stabilityai/stable-diffusion-2-1-base from [huggingface page](https://huggingface.co/stabilityai/stable-diffusion-2-1-base). + +weights: download the runwayml/stable-diffusion-v1-5 from [huggingface page](https://huggingface.co/runwayml/stable-diffusion-v1-5). + + +weights: download the stabilityai/stable-diffusion-xl-base-1.0 from [huggingface page](https://huggingface.co/stabilityai/stable-diffusion-xl-base-1.0). + +weights: download the madebyollin/sdxl-vae-fp16-fix from [huggingface page](https://huggingface.co/madebyollin/sdxl-vae-fp16-fix). + +## Step 3: Training + +If you have downloaded the weights and data, please import the environment variables like below. +```bash +export MODEL_PATH=/path/to/sd_weights +export DATA_PATH=/path/to/data +export VAE_PATH=/path/to/vae_weights # only for sdxl +``` +### sd2.1 or sd1.5 +#### One GPU +```bash +bash run_sd_single.sh +``` +#### 8 GPUs +``` +bash run_sd_multi.sh +``` +### sdxl +#### 8 GPUs +```bash +bash run_sd_xl.sh +``` + +## Results +### sd2.1 + +GPUs | FPS +---- | --- +BI-V100 x8 | ips per gpu=16 +``` +## Reference + +- [diffusers](https://github.com/huggingface/diffusers) + diff --git a/multimodal/diffusion/stable-diffusion/diffusers/configs/default_config.yaml b/multimodal/diffusion/stable-diffusion/diffusers/configs/default_config.yaml new file mode 100644 index 0000000000000000000000000000000000000000..829e0b662c4539863654a9ac8fcfb40edc05b993 --- /dev/null +++ b/multimodal/diffusion/stable-diffusion/diffusers/configs/default_config.yaml @@ -0,0 +1,20 @@ +compute_environment: LOCAL_MACHINE +debug: false +deepspeed_config: + gradient_accumulation_steps: 1 + steps_per_print: 1 + zero3_init_flag: true + zero_stage: 0 +distributed_type: DEEPSPEED +downcast_bf16: 'no' +machine_rank: 0 +main_training_function: main +mixed_precision: fp16 +num_machines: 1 +num_processes: 16 +rdzv_backend: static +same_network: true +tpu_env: [] +tpu_use_cluster: false +tpu_use_sudo: false +use_cpu: false diff --git a/multimodal/diffusion/stable-diffusion/diffusers/configs/single_config.yaml b/multimodal/diffusion/stable-diffusion/diffusers/configs/single_config.yaml new file mode 100644 index 0000000000000000000000000000000000000000..a20a8a46bf7bd67787202621eb67757eb0b47311 --- /dev/null +++ b/multimodal/diffusion/stable-diffusion/diffusers/configs/single_config.yaml @@ -0,0 +1,20 @@ +compute_environment: LOCAL_MACHINE +debug: false +deepspeed_config: + gradient_accumulation_steps: 1 + steps_per_print: 1 + zero3_init_flag: true + zero_stage: 0 +distributed_type: DEEPSPEED +downcast_bf16: 'no' +machine_rank: 0 +main_training_function: main +mixed_precision: fp16 +num_machines: 1 +num_processes: 1 +rdzv_backend: static +same_network: true +tpu_env: [] +tpu_use_cluster: false +tpu_use_sudo: false +use_cpu: false diff --git a/multimodal/diffusion/stable-diffusion/diffusers/configs/zero2_config.yaml b/multimodal/diffusion/stable-diffusion/diffusers/configs/zero2_config.yaml new file mode 100644 index 0000000000000000000000000000000000000000..8ffdbbd1e9a315af2bce3960f7dfd37937cceaf3 --- /dev/null +++ b/multimodal/diffusion/stable-diffusion/diffusers/configs/zero2_config.yaml @@ -0,0 +1,23 @@ +compute_environment: LOCAL_MACHINE +debug: false +deepspeed_config: + gradient_accumulation_steps: 1 + gradient_clipping: 1.0 + offload_optimizer_device: none + offload_param_device: none + zero3_init_flag: false + zero_stage: 2 +distributed_type: DEEPSPEED +downcast_bf16: 'no' +enable_cpu_affinity: false +machine_rank: 0 +main_training_function: main +mixed_precision: fp16 +num_machines: 1 +num_processes: 16 +rdzv_backend: static +same_network: true +tpu_env: [] +tpu_use_cluster: false +tpu_use_sudo: false +use_cpu: false diff --git a/multimodal/diffusion/stable-diffusion/diffusers/requirements.txt b/multimodal/diffusion/stable-diffusion/diffusers/requirements.txt new file mode 100644 index 0000000000000000000000000000000000000000..7b23b4ce9d92d8fd40edc25d19d5a6cf8bd40ab7 --- /dev/null +++ b/multimodal/diffusion/stable-diffusion/diffusers/requirements.txt @@ -0,0 +1,5 @@ +accelerate +datasets +ftfy +Jinja2 +peft==0.7.0 diff --git a/multimodal/diffusion/stable-diffusion/diffusers/run_sd_1.5_multi.sh b/multimodal/diffusion/stable-diffusion/diffusers/run_sd_1.5_multi.sh new file mode 100755 index 0000000000000000000000000000000000000000..6f53ca5583114368a42656b6c012f2d5a60bd2b0 --- /dev/null +++ b/multimodal/diffusion/stable-diffusion/diffusers/run_sd_1.5_multi.sh @@ -0,0 +1,47 @@ +# Copyright (c) 2024, Shanghai Iluvatar CoreX Semiconductor Co., Ltd. +# All Rights Reserved. +# +# Licensed under the Apache License, Version 2.0 (the "License"); you may +# not use this file except in compliance with the License. You may obtain +# a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +# License for the specific language governing permissions and limitations +# under the License. + + +export CLIP_FLASH_ATTN=1 +export USE_NHWC_GN=1 +export USE_IXFORMER_GEGLU=1 +export USE_APEX_LN=1 +export ENABLE_FLASH_ATTENTION_WITH_IXDNN=1 +echo $ENABLE_FLASH_ATTENTION_WITH_IXDNN + +export MODEL_PATH=${MODEL_PATH:-runwayml/stable-diffusion-v1-5} +export DATASET_PATH=${DATASET_PATH:-lambdalabs/pokemon-blip-captions} + + +accelerate launch --config_file configs/default_config.yaml --mixed_precision="fp16" train_text_to_image.py \ + --pretrained_model_name_or_path=$MODEL_PATH \ + --dataset_name=$DATASET_PATH \ + --resolution=512 \ + --seed 42 \ + --center_crop \ + --random_flip \ + --train_batch_size=32 \ + --gradient_accumulation_steps=1 \ + --gradient_checkpointing \ + --learning_rate=1e-05 \ + --max_grad_norm=1 \ + --lr_scheduler="constant" \ + --lr_warmup_steps=0 \ + --output_dir="sd-pokemon-model-3" \ + --max_train_steps=100 \ + --NHWC \ + --dataloader_num_workers=32 \ + --apex_fused_adam + # --use_ema diff --git a/multimodal/diffusion/stable-diffusion/diffusers/run_sd_1.5_single.sh b/multimodal/diffusion/stable-diffusion/diffusers/run_sd_1.5_single.sh new file mode 100755 index 0000000000000000000000000000000000000000..b5e328c36b6becd8c742e4d5577aac4a4b9dea89 --- /dev/null +++ b/multimodal/diffusion/stable-diffusion/diffusers/run_sd_1.5_single.sh @@ -0,0 +1,46 @@ +# Copyright (c) 2024, Shanghai Iluvatar CoreX Semiconductor Co., Ltd. +# All Rights Reserved. +# +# Licensed under the Apache License, Version 2.0 (the "License"); you may +# not use this file except in compliance with the License. You may obtain +# a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +# License for the specific language governing permissions and limitations +# under the License. + + +export CLIP_FLASH_ATTN=1 +export USE_NHWC_GN=1 +export USE_IXFORMER_GEGLU=1 +export USE_APEX_LN=1 +export ENABLE_FLASH_ATTENTION_WITH_IXDNN=1 + +export MODEL_PATH=${MODEL_PATH:-runwayml/stable-diffusion-v1-5} +export DATASET_PATH=${DATASET_PATH:-lambdalabs/pokemon-blip-captions} + + +accelerate launch --config_file configs/single_config.yaml --mixed_precision="fp16" train_text_to_image.py \ + --pretrained_model_name_or_path=$MODEL_PATH \ + --dataset_name=$DATASET_PATH \ + --resolution=512 \ + --seed 42 \ + --center_crop \ + --random_flip \ + --train_batch_size=32 \ + --gradient_accumulation_steps=1 \ + --gradient_checkpointing \ + --learning_rate=1e-05 \ + --max_grad_norm=1 \ + --lr_scheduler="constant" \ + --lr_warmup_steps=0 \ + --output_dir="sd-pokemon-model-3" \ + --max_train_steps=100 \ + --NHWC \ + --dataloader_num_workers=32 \ + --apex_fused_adam + # --use_ema diff --git a/multimodal/diffusion/stable-diffusion/diffusers/run_sd_2.1_multi.sh b/multimodal/diffusion/stable-diffusion/diffusers/run_sd_2.1_multi.sh new file mode 100755 index 0000000000000000000000000000000000000000..830101960b320b949363056e408dab4c91431e54 --- /dev/null +++ b/multimodal/diffusion/stable-diffusion/diffusers/run_sd_2.1_multi.sh @@ -0,0 +1,50 @@ +# Copyright (c) 2024, Shanghai Iluvatar CoreX Semiconductor Co., Ltd. +# All Rights Reserved. +# +# Licensed under the Apache License, Version 2.0 (the "License"); you may +# not use this file except in compliance with the License. You may obtain +# a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +# License for the specific language governing permissions and limitations +# under the License. + + +export CLIP_FLASH_ATTN=1 +export USE_NHWC_GN=1 +export USE_IXFORMER_GEGLU=1 +export USE_APEX_LN=1 +export ENABLE_FLASH_ATTENTION_WITH_IXDNN=1 +echo $ENABLE_FLASH_ATTENTION_WITH_IXDNN + +export MODEL_PATH=${MODEL_PATH:-stabilityai/stable-diffusion-2-1-base} +export DATASET_PATH=${DATASET_PATH:-lambdalabs/pokemon-blip-captions} +echo $MODEL_PATH +echo $DATASET_PATH + +# cd /data/yili.li/Diffusers/diffusers/examples/text_to_image + +accelerate launch --config_file configs/default_config.yaml --mixed_precision="fp16" train_text_to_image.py \ + --pretrained_model_name_or_path=$MODEL_PATH \ + --dataset_name=$DATASET_PATH \ + --resolution=512 \ + --seed 42 \ + --center_crop \ + --random_flip \ + --train_batch_size=32 \ + --gradient_accumulation_steps=1 \ + --gradient_checkpointing \ + --learning_rate=1e-05 \ + --max_grad_norm=1 \ + --lr_scheduler="constant" \ + --lr_warmup_steps=0 \ + --output_dir="sd-pokemon-model-3" \ + --max_train_steps=100 \ + --NHWC \ + --dataloader_num_workers=32 \ + --apex_fused_adam + # --use_ema diff --git a/multimodal/diffusion/stable-diffusion/diffusers/run_sd_2.1_single.sh b/multimodal/diffusion/stable-diffusion/diffusers/run_sd_2.1_single.sh new file mode 100755 index 0000000000000000000000000000000000000000..7bc92db1c9e2bd4cd7a8297ee96448d2550350b1 --- /dev/null +++ b/multimodal/diffusion/stable-diffusion/diffusers/run_sd_2.1_single.sh @@ -0,0 +1,46 @@ +# Copyright (c) 2024, Shanghai Iluvatar CoreX Semiconductor Co., Ltd. +# All Rights Reserved. +# +# Licensed under the Apache License, Version 2.0 (the "License"); you may +# not use this file except in compliance with the License. You may obtain +# a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +# License for the specific language governing permissions and limitations +# under the License. + + +export CLIP_FLASH_ATTN=1 +export USE_NHWC_GN=1 +export USE_IXFORMER_GEGLU=1 +export USE_APEX_LN=1 +export ENABLE_FLASH_ATTENTION_WITH_IXDNN=1 + +export MODEL_PATH=${MODEL_PATH:-stabilityai/stable-diffusion-2-1-base} +export DATASET_PATH=${DATASET_PATH:-lambdalabs/pokemon-blip-captions} + + +accelerate launch --config_file configs/single_config.yaml --mixed_precision="fp16" train_text_to_image.py \ + --pretrained_model_name_or_path=$MODEL_PATH \ + --dataset_name=$DATASET_PATH \ + --resolution=512 \ + --seed 42 \ + --center_crop \ + --random_flip \ + --train_batch_size=32 \ + --gradient_accumulation_steps=1 \ + --gradient_checkpointing \ + --learning_rate=1e-05 \ + --max_grad_norm=1 \ + --lr_scheduler="constant" \ + --lr_warmup_steps=0 \ + --output_dir="sd-pokemon-model-3" \ + --max_train_steps=100 \ + --NHWC \ + --dataloader_num_workers=32 \ + --apex_fused_adam + # --use_ema diff --git a/multimodal/diffusion/stable-diffusion/diffusers/run_sd_xl.sh b/multimodal/diffusion/stable-diffusion/diffusers/run_sd_xl.sh new file mode 100755 index 0000000000000000000000000000000000000000..7f9cad5f2bb81be05f102005b112dc7d4b28fe5d --- /dev/null +++ b/multimodal/diffusion/stable-diffusion/diffusers/run_sd_xl.sh @@ -0,0 +1,51 @@ +# Copyright (c) 2024, Shanghai Iluvatar CoreX Semiconductor Co., Ltd. +# All Rights Reserved. +# +# Licensed under the Apache License, Version 2.0 (the "License"); you may +# not use this file except in compliance with the License. You may obtain +# a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +# License for the specific language governing permissions and limitations +# under the License. + + +export CLIP_FLASH_ATTN=1 +export USE_NHWC_GN=1 +export USE_IXFORMER_GEGLU=1 +export USE_APEX_LN=1 +export USE_NATIVE_ATTN=0 +export ENABLE_FLASH_ATTENTION_WITH_IXDNN=1 + +export MODEL_PATH=${MODEL_PATH:-stabilityai/stable-diffusion-xl-base-1.0} +export DATASET_PATH=${DATASET_PATH:-lambdalabs/pokemon-blip-captions} +export VAE_PATH=${VAE_PATH:-madebyollin/sdxl-vae-fp16-fix} + + +accelerate launch --config_file configs/zero2_config.yaml --mixed_precision="fp16" train_text_to_image_sdxl.py \ + --pretrained_model_name_or_path=$MODEL_PATH \ + --pretrained_vae_model_name_or_path=$VAE_PATH \ + --dataset_name=$DATASET_PATH \ + --resolution=512 \ + --seed 42 \ + --gradient_checkpointing \ + --center_crop \ + --random_flip \ + --train_batch_size=32 \ + --gradient_accumulation_steps=1 \ + --gradient_checkpointing \ + --learning_rate=1e-05 \ + --max_grad_norm=1 \ + --lr_scheduler="constant" \ + --lr_warmup_steps=0 \ + --output_dir="sd-pokemon-model-3" \ + --max_train_steps=100 \ + --dataloader_num_workers=32 \ + --NHWC \ + --apex_fused_adam + # --use_ema + diff --git a/multimodal/diffusion/stable-diffusion/diffusers/train_text_to_image.py b/multimodal/diffusion/stable-diffusion/diffusers/train_text_to_image.py new file mode 100644 index 0000000000000000000000000000000000000000..2efd5c4d1f069333307fb93619fc97678c68f4f2 --- /dev/null +++ b/multimodal/diffusion/stable-diffusion/diffusers/train_text_to_image.py @@ -0,0 +1,1145 @@ +# Copyright (c) 2024, Shanghai Iluvatar CoreX Semiconductor Co., Ltd. +# All Rights Reserved. +# +# Licensed under the Apache License, Version 2.0 (the "License"); you may +# not use this file except in compliance with the License. You may obtain +# a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +# License for the specific language governing permissions and limitations +# under the License. + + +#!/usr/bin/env python +# coding=utf-8 +# Copyright 2024 The HuggingFace Inc. team. All rights reserved. +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +import argparse +import logging +import math +import os +import random +import shutil +from pathlib import Path + +import accelerate +import datasets +import numpy as np +import torch +import torch.nn.functional as F +import torch.utils.checkpoint +import transformers +from accelerate import Accelerator +from accelerate.logging import get_logger +from accelerate.state import AcceleratorState +from accelerate.utils import ProjectConfiguration, set_seed +from datasets import load_dataset +from huggingface_hub import create_repo, upload_folder +from packaging import version +from torchvision import transforms +from tqdm.auto import tqdm +from transformers import CLIPTextModel, CLIPTokenizer +from transformers.utils import ContextManagers + +import diffusers +from diffusers import AutoencoderKL, DDPMScheduler, StableDiffusionPipeline, UNet2DConditionModel +from diffusers.optimization import get_scheduler +from diffusers.training_utils import EMAModel, compute_snr +from diffusers.utils import check_min_version, deprecate, is_wandb_available, make_image_grid +from diffusers.utils.hub_utils import load_or_create_model_card, populate_model_card +from diffusers.utils.import_utils import is_xformers_available +from diffusers.utils.torch_utils import is_compiled_module + + +if is_wandb_available(): + import wandb + + +# Will error if the minimal version of diffusers is not installed. Remove at your own risks. +check_min_version("0.27.0") + +logger = get_logger(__name__, log_level="INFO") + +DATASET_NAME_MAPPING = { + "lambdalabs/pokemon-blip-captions": ("image", "text"), +} + + +def save_model_card( + args, + repo_id: str, + images: list = None, + repo_folder: str = None, +): + img_str = "" + if len(images) > 0: + image_grid = make_image_grid(images, 1, len(args.validation_prompts)) + image_grid.save(os.path.join(repo_folder, "val_imgs_grid.png")) + img_str += "![val_imgs_grid](./val_imgs_grid.png)\n" + + model_description = f""" +# Text-to-image finetuning - {repo_id} + +This pipeline was finetuned from **{args.pretrained_model_name_or_path}** on the **{args.dataset_name}** dataset. Below are some example images generated with the finetuned pipeline using the following prompts: {args.validation_prompts}: \n +{img_str} + +## Pipeline usage + +You can use the pipeline like so: + +```python +from diffusers import DiffusionPipeline +import torch + +pipeline = DiffusionPipeline.from_pretrained("{repo_id}", torch_dtype=torch.float16) +prompt = "{args.validation_prompts[0]}" +image = pipeline(prompt).images[0] +image.save("my_image.png") +``` + +## Training info + +These are the key hyperparameters used during training: + +* Epochs: {args.num_train_epochs} +* Learning rate: {args.learning_rate} +* Batch size: {args.train_batch_size} +* Gradient accumulation steps: {args.gradient_accumulation_steps} +* Image resolution: {args.resolution} +* Mixed-precision: {args.mixed_precision} + +""" + wandb_info = "" + if is_wandb_available(): + wandb_run_url = None + if wandb.run is not None: + wandb_run_url = wandb.run.url + + if wandb_run_url is not None: + wandb_info = f""" +More information on all the CLI arguments and the environment are available on your [`wandb` run page]({wandb_run_url}). +""" + + model_description += wandb_info + + model_card = load_or_create_model_card( + repo_id_or_path=repo_id, + from_training=True, + license="creativeml-openrail-m", + base_model=args.pretrained_model_name_or_path, + model_description=model_description, + inference=True, + ) + + tags = ["stable-diffusion", "stable-diffusion-diffusers", "text-to-image", "diffusers", "diffusers-training"] + model_card = populate_model_card(model_card, tags=tags) + + model_card.save(os.path.join(repo_folder, "README.md")) + + +def log_validation(vae, text_encoder, tokenizer, unet, args, accelerator, weight_dtype, epoch): + logger.info("Running validation... ") + + pipeline = StableDiffusionPipeline.from_pretrained( + args.pretrained_model_name_or_path, + vae=accelerator.unwrap_model(vae), + text_encoder=accelerator.unwrap_model(text_encoder), + tokenizer=tokenizer, + unet=accelerator.unwrap_model(unet), + safety_checker=None, + revision=args.revision, + variant=args.variant, + torch_dtype=weight_dtype, + ) + pipeline = pipeline.to(accelerator.device) + pipeline.set_progress_bar_config(disable=True) + + if args.enable_xformers_memory_efficient_attention: + pipeline.enable_xformers_memory_efficient_attention() + + if args.seed is None: + generator = None + else: + generator = torch.Generator(device=accelerator.device).manual_seed(args.seed) + + images = [] + for i in range(len(args.validation_prompts)): + with torch.autocast("cuda"): + image = pipeline(args.validation_prompts[i], num_inference_steps=20, generator=generator).images[0] + + images.append(image) + + for tracker in accelerator.trackers: + if tracker.name == "tensorboard": + np_images = np.stack([np.asarray(img) for img in images]) + tracker.writer.add_images("validation", np_images, epoch, dataformats="NHWC") + elif tracker.name == "wandb": + tracker.log( + { + "validation": [ + wandb.Image(image, caption=f"{i}: {args.validation_prompts[i]}") + for i, image in enumerate(images) + ] + } + ) + else: + logger.warning(f"image logging not implemented for {tracker.name}") + + del pipeline + torch.cuda.empty_cache() + + return images + + +def parse_args(): + parser = argparse.ArgumentParser(description="Simple example of a training script.") + parser.add_argument( + "--input_perturbation", type=float, default=0, help="The scale of input perturbation. Recommended 0.1." + ) + parser.add_argument( + "--pretrained_model_name_or_path", + type=str, + default=None, + required=True, + help="Path to pretrained model or model identifier from huggingface.co/models.", + ) + parser.add_argument( + "--revision", + type=str, + default=None, + required=False, + help="Revision of pretrained model identifier from huggingface.co/models.", + ) + parser.add_argument( + "--variant", + type=str, + default=None, + help="Variant of the model files of the pretrained model identifier from huggingface.co/models, 'e.g.' fp16", + ) + parser.add_argument( + "--dataset_name", + type=str, + default=None, + help=( + "The name of the Dataset (from the HuggingFace hub) to train on (could be your own, possibly private," + " dataset). It can also be a path pointing to a local copy of a dataset in your filesystem," + " or to a folder containing files that 🤗 Datasets can understand." + ), + ) + parser.add_argument( + "--dataset_config_name", + type=str, + default=None, + help="The config of the Dataset, leave as None if there's only one config.", + ) + parser.add_argument( + "--train_data_dir", + type=str, + default=None, + help=( + "A folder containing the training data. Folder contents must follow the structure described in" + " https://huggingface.co/docs/datasets/image_dataset#imagefolder. In particular, a `metadata.jsonl` file" + " must exist to provide the captions for the images. Ignored if `dataset_name` is specified." + ), + ) + parser.add_argument( + "--image_column", type=str, default="image", help="The column of the dataset containing an image." + ) + parser.add_argument( + "--caption_column", + type=str, + default="text", + help="The column of the dataset containing a caption or a list of captions.", + ) + parser.add_argument( + "--max_train_samples", + type=int, + default=None, + help=( + "For debugging purposes or quicker training, truncate the number of training examples to this " + "value if set." + ), + ) + parser.add_argument( + "--validation_prompts", + type=str, + default=None, + nargs="+", + help=("A set of prompts evaluated every `--validation_epochs` and logged to `--report_to`."), + ) + parser.add_argument( + "--output_dir", + type=str, + default="sd-model-finetuned", + help="The output directory where the model predictions and checkpoints will be written.", + ) + parser.add_argument( + "--cache_dir", + type=str, + default=None, + help="The directory where the downloaded models and datasets will be stored.", + ) + parser.add_argument("--seed", type=int, default=None, help="A seed for reproducible training.") + parser.add_argument( + "--resolution", + type=int, + default=512, + help=( + "The resolution for input images, all the images in the train/validation dataset will be resized to this" + " resolution" + ), + ) + parser.add_argument( + "--center_crop", + default=False, + action="store_true", + help=( + "Whether to center crop the input images to the resolution. If not set, the images will be randomly" + " cropped. The images will be resized to the resolution first before cropping." + ), + ) + parser.add_argument( + "--random_flip", + action="store_true", + help="whether to randomly flip images horizontally", + ) + parser.add_argument( + "--train_batch_size", type=int, default=16, help="Batch size (per device) for the training dataloader." + ) + parser.add_argument("--num_train_epochs", type=int, default=100) + parser.add_argument( + "--max_train_steps", + type=int, + default=None, + help="Total number of training steps to perform. If provided, overrides num_train_epochs.", + ) + parser.add_argument( + "--gradient_accumulation_steps", + type=int, + default=1, + help="Number of updates steps to accumulate before performing a backward/update pass.", + ) + parser.add_argument( + "--gradient_checkpointing", + action="store_true", + help="Whether or not to use gradient checkpointing to save memory at the expense of slower backward pass.", + ) + parser.add_argument( + "--learning_rate", + type=float, + default=1e-4, + help="Initial learning rate (after the potential warmup period) to use.", + ) + parser.add_argument( + "--scale_lr", + action="store_true", + default=False, + help="Scale the learning rate by the number of GPUs, gradient accumulation steps, and batch size.", + ) + parser.add_argument( + "--lr_scheduler", + type=str, + default="constant", + help=( + 'The scheduler type to use. Choose between ["linear", "cosine", "cosine_with_restarts", "polynomial",' + ' "constant", "constant_with_warmup"]' + ), + ) + parser.add_argument( + "--lr_warmup_steps", type=int, default=500, help="Number of steps for the warmup in the lr scheduler." + ) + parser.add_argument( + "--snr_gamma", + type=float, + default=None, + help="SNR weighting gamma to be used if rebalancing the loss. Recommended value is 5.0. " + "More details here: https://arxiv.org/abs/2303.09556.", + ) + parser.add_argument( + "--use_8bit_adam", action="store_true", help="Whether or not to use 8-bit Adam from bitsandbytes." + ) + parser.add_argument( + "--allow_tf32", + action="store_true", + help=( + "Whether or not to allow TF32 on Ampere GPUs. Can be used to speed up training. For more information, see" + " https://pytorch.org/docs/stable/notes/cuda.html#tensorfloat-32-tf32-on-ampere-devices" + ), + ) + parser.add_argument("--use_ema", action="store_true", help="Whether to use EMA model.") + parser.add_argument( + "--non_ema_revision", + type=str, + default=None, + required=False, + help=( + "Revision of pretrained non-ema model identifier. Must be a branch, tag or git identifier of the local or" + " remote repository specified with --pretrained_model_name_or_path." + ), + ) + parser.add_argument( + "--dataloader_num_workers", + type=int, + default=16, + help=( + "Number of subprocesses to use for data loading. 0 means that the data will be loaded in the main process." + ), + ) + parser.add_argument("--adam_beta1", type=float, default=0.9, help="The beta1 parameter for the Adam optimizer.") + parser.add_argument("--adam_beta2", type=float, default=0.999, help="The beta2 parameter for the Adam optimizer.") + parser.add_argument("--adam_weight_decay", type=float, default=1e-2, help="Weight decay to use.") + parser.add_argument("--adam_epsilon", type=float, default=1e-08, help="Epsilon value for the Adam optimizer") + parser.add_argument("--max_grad_norm", default=1.0, type=float, help="Max gradient norm.") + parser.add_argument("--push_to_hub", action="store_true", help="Whether or not to push the model to the Hub.") + parser.add_argument("--hub_token", type=str, default=None, help="The token to use to push to the Model Hub.") + parser.add_argument( + "--prediction_type", + type=str, + default=None, + help="The prediction_type that shall be used for training. Choose between 'epsilon' or 'v_prediction' or leave `None`. If left to `None` the default prediction type of the scheduler: `noise_scheduler.config.prediction_type` is chosen.", + ) + parser.add_argument( + "--hub_model_id", + type=str, + default=None, + help="The name of the repository to keep in sync with the local `output_dir`.", + ) + parser.add_argument( + "--logging_dir", + type=str, + default="logs", + help=( + "[TensorBoard](https://www.tensorflow.org/tensorboard) log directory. Will default to" + " *output_dir/runs/**CURRENT_DATETIME_HOSTNAME***." + ), + ) + parser.add_argument( + "--mixed_precision", + type=str, + default=None, + choices=["no", "fp16", "bf16"], + help=( + "Whether to use mixed precision. Choose between fp16 and bf16 (bfloat16). Bf16 requires PyTorch >=" + " 1.10.and an Nvidia Ampere GPU. Default to the value of accelerate config of the current system or the" + " flag passed with the `accelerate.launch` command. Use this argument to override the accelerate config." + ), + ) + parser.add_argument( + "--report_to", + type=str, + default="tensorboard", + help=( + 'The integration to report the results and logs to. Supported platforms are `"tensorboard"`' + ' (default), `"wandb"` and `"comet_ml"`. Use `"all"` to report to all integrations.' + ), + ) + parser.add_argument("--local_rank", type=int, default=-1, help="For distributed training: local_rank") + parser.add_argument( + "--checkpointing_steps", + type=int, + default=500, + help=( + "Save a checkpoint of the training state every X updates. These checkpoints are only suitable for resuming" + " training using `--resume_from_checkpoint`." + ), + ) + parser.add_argument( + "--checkpoints_total_limit", + type=int, + default=None, + help=("Max number of checkpoints to store."), + ) + parser.add_argument( + "--resume_from_checkpoint", + type=str, + default=None, + help=( + "Whether training should be resumed from a previous checkpoint. Use a path saved by" + ' `--checkpointing_steps`, or `"latest"` to automatically select the last available checkpoint.' + ), + ) + parser.add_argument( + "--enable_xformers_memory_efficient_attention", action="store_true", help="Whether or not to use xformers." + ) + parser.add_argument("--noise_offset", type=float, default=0, help="The scale of noise offset.") + parser.add_argument( + "--validation_epochs", + type=int, + default=5, + help="Run validation every X epochs.", + ) + parser.add_argument( + "--tracker_project_name", + type=str, + default="text2image-fine-tune", + help=( + "The `project_name` argument passed to Accelerator.init_trackers for" + " more information see https://huggingface.co/docs/accelerate/v0.17.0/en/package_reference/accelerator#accelerate.Accelerator" + ), + ) + parser.add_argument( + "--NHWC", + action="store_true", + help="Whether or not using NHWC for training", + ) + parser.add_argument( + "--apex_fused_adam", + action="store_true", + help="Whether or not using fused_adam optimizer", + ) + + args = parser.parse_args() + env_local_rank = int(os.environ.get("LOCAL_RANK", -1)) + if env_local_rank != -1 and env_local_rank != args.local_rank: + args.local_rank = env_local_rank + + # Sanity checks + if args.dataset_name is None and args.train_data_dir is None: + raise ValueError("Need either a dataset name or a training folder.") + + # default to using the same revision for the non-ema model if not specified + if args.non_ema_revision is None: + args.non_ema_revision = args.revision + + return args + + +def main(): + args = parse_args() + + if args.report_to == "wandb" and args.hub_token is not None: + raise ValueError( + "You cannot use both --report_to=wandb and --hub_token due to a security risk of exposing your token." + " Please use `huggingface-cli login` to authenticate with the Hub." + ) + + if args.non_ema_revision is not None: + deprecate( + "non_ema_revision!=None", + "0.15.0", + message=( + "Downloading 'non_ema' weights from revision branches of the Hub is deprecated. Please make sure to" + " use `--variant=non_ema` instead." + ), + ) + logging_dir = os.path.join(args.output_dir, args.logging_dir) + + accelerator_project_config = ProjectConfiguration(project_dir=args.output_dir, logging_dir=logging_dir) + + accelerator = Accelerator( + gradient_accumulation_steps=args.gradient_accumulation_steps, + mixed_precision=args.mixed_precision, + log_with=args.report_to, + project_config=accelerator_project_config, + ) + + # Make one log on every process with the configuration for debugging. + logging.basicConfig( + format="%(asctime)s - %(levelname)s - %(name)s - %(message)s", + datefmt="%m/%d/%Y %H:%M:%S", + level=logging.INFO, + ) + logger.info(accelerator.state, main_process_only=False) + if accelerator.is_local_main_process: + datasets.utils.logging.set_verbosity_warning() + transformers.utils.logging.set_verbosity_warning() + diffusers.utils.logging.set_verbosity_info() + else: + datasets.utils.logging.set_verbosity_error() + transformers.utils.logging.set_verbosity_error() + diffusers.utils.logging.set_verbosity_error() + + # If passed along, set the training seed now. + if args.seed is not None: + set_seed(args.seed) + + # Handle the repository creation + if accelerator.is_main_process: + if args.output_dir is not None: + os.makedirs(args.output_dir, exist_ok=True) + + if args.push_to_hub: + repo_id = create_repo( + repo_id=args.hub_model_id or Path(args.output_dir).name, exist_ok=True, token=args.hub_token + ).repo_id + + # Load scheduler, tokenizer and models. + noise_scheduler = DDPMScheduler.from_pretrained(args.pretrained_model_name_or_path, subfolder="scheduler") + tokenizer = CLIPTokenizer.from_pretrained( + args.pretrained_model_name_or_path, subfolder="tokenizer", revision=args.revision + ) + + def deepspeed_zero_init_disabled_context_manager(): + """ + returns either a context list that includes one that will disable zero.Init or an empty context list + """ + deepspeed_plugin = AcceleratorState().deepspeed_plugin if accelerate.state.is_initialized() else None + if deepspeed_plugin is None: + return [] + + return [deepspeed_plugin.zero3_init_context_manager(enable=False)] + + # Currently Accelerate doesn't know how to handle multiple models under Deepspeed ZeRO stage 3. + # For this to work properly all models must be run through `accelerate.prepare`. But accelerate + # will try to assign the same optimizer with the same weights to all models during + # `deepspeed.initialize`, which of course doesn't work. + # + # For now the following workaround will partially support Deepspeed ZeRO-3, by excluding the 2 + # frozen models from being partitioned during `zero.Init` which gets called during + # `from_pretrained` So CLIPTextModel and AutoencoderKL will not enjoy the parameter sharding + # across multiple gpus and only UNet2DConditionModel will get ZeRO sharded. + with ContextManagers(deepspeed_zero_init_disabled_context_manager()): + text_encoder = CLIPTextModel.from_pretrained( + args.pretrained_model_name_or_path, subfolder="text_encoder", revision=args.revision, variant=args.variant + ) + vae = AutoencoderKL.from_pretrained( + args.pretrained_model_name_or_path, subfolder="vae", revision=args.revision, variant=args.variant + ) + + unet = UNet2DConditionModel.from_pretrained( + args.pretrained_model_name_or_path, subfolder="unet", revision=args.non_ema_revision + ) + # Freeze vae and text_encoder and set unet to trainable + vae.requires_grad_(False) + text_encoder.requires_grad_(False) + unet.train() + + # Create EMA for the unet. + if args.use_ema: + ema_unet = UNet2DConditionModel.from_pretrained( + args.pretrained_model_name_or_path, subfolder="unet", revision=args.revision, variant=args.variant + ) + ema_unet = EMAModel(ema_unet.parameters(), model_cls=UNet2DConditionModel, model_config=ema_unet.config) + + if args.enable_xformers_memory_efficient_attention: + if is_xformers_available(): + import xformers + + xformers_version = version.parse(xformers.__version__) + if xformers_version == version.parse("0.0.16"): + logger.warning( + "xFormers 0.0.16 cannot be used for training in some GPUs. If you observe problems during training, please update xFormers to at least 0.0.17. See https://huggingface.co/docs/diffusers/main/en/optimization/xformers for more details." + ) + unet.enable_xformers_memory_efficient_attention() + else: + raise ValueError("xformers is not available. Make sure it is installed correctly") + + # `accelerate` 0.16.0 will have better support for customized saving + if version.parse(accelerate.__version__) >= version.parse("0.16.0"): + # create custom saving & loading hooks so that `accelerator.save_state(...)` serializes in a nice format + def save_model_hook(models, weights, output_dir): + if accelerator.is_main_process: + if args.use_ema: + ema_unet.save_pretrained(os.path.join(output_dir, "unet_ema")) + + for i, model in enumerate(models): + model.save_pretrained(os.path.join(output_dir, "unet")) + + # make sure to pop weight so that corresponding model is not saved again + # weights.pop() + + def load_model_hook(models, input_dir): + if args.use_ema: + load_model = EMAModel.from_pretrained(os.path.join(input_dir, "unet_ema"), UNet2DConditionModel) + ema_unet.load_state_dict(load_model.state_dict()) + ema_unet.to(accelerator.device) + del load_model + + for _ in range(len(models)): + # pop models so that they are not loaded again + model = models.pop() + + # load diffusers style into model + load_model = UNet2DConditionModel.from_pretrained(input_dir, subfolder="unet") + model.register_to_config(**load_model.config) + + model.load_state_dict(load_model.state_dict()) + del load_model + + accelerator.register_save_state_pre_hook(save_model_hook) + accelerator.register_load_state_pre_hook(load_model_hook) + + if args.gradient_checkpointing: + unet.enable_gradient_checkpointing() + + # Enable TF32 for faster training on Ampere GPUs, + # cf https://pytorch.org/docs/stable/notes/cuda.html#tensorfloat-32-tf32-on-ampere-devices + if args.allow_tf32: + torch.backends.cuda.matmul.allow_tf32 = True + + if args.scale_lr: + args.learning_rate = ( + args.learning_rate * args.gradient_accumulation_steps * args.train_batch_size * accelerator.num_processes + ) + + # Initialize the optimizer + if args.use_8bit_adam: + try: + import bitsandbytes as bnb + except ImportError: + raise ImportError( + "Please install bitsandbytes to use 8-bit Adam. You can do so by running `pip install bitsandbytes`" + ) + + optimizer_cls = bnb.optim.AdamW8bit + elif args.apex_fused_adam: + import apex + optimizer_cls = apex.optimizers.FusedAdam + + else: + optimizer_cls = torch.optim.AdamW + + optimizer = optimizer_cls( + unet.parameters(), + lr=args.learning_rate, + betas=(args.adam_beta1, args.adam_beta2), + weight_decay=args.adam_weight_decay, + eps=args.adam_epsilon, + ) + + # Get the datasets: you can either provide your own training and evaluation files (see below) + # or specify a Dataset from the hub (the dataset will be downloaded automatically from the datasets Hub). + + # In distributed training, the load_dataset function guarantees that only one local process can concurrently + # download the dataset. + if args.dataset_name is not None: + # Downloading and loading a dataset from the hub. + dataset = load_dataset( + args.dataset_name, + args.dataset_config_name, + cache_dir=args.cache_dir, + data_dir=args.train_data_dir, + ) + else: + data_files = {} + if args.train_data_dir is not None: + data_files["train"] = os.path.join(args.train_data_dir, "**") + dataset = load_dataset( + "imagefolder", + data_files=data_files, + cache_dir=args.cache_dir, + ) + # See more about loading custom images at + # https://huggingface.co/docs/datasets/v2.4.0/en/image_load#imagefolder + + # Preprocessing the datasets. + # We need to tokenize inputs and targets. + column_names = dataset["train"].column_names + + # 6. Get the column names for input/target. + dataset_columns = DATASET_NAME_MAPPING.get(args.dataset_name, None) + if args.image_column is None: + image_column = dataset_columns[0] if dataset_columns is not None else column_names[0] + else: + image_column = args.image_column + if image_column not in column_names: + raise ValueError( + f"--image_column' value '{args.image_column}' needs to be one of: {', '.join(column_names)}" + ) + if args.caption_column is None: + caption_column = dataset_columns[1] if dataset_columns is not None else column_names[1] + else: + caption_column = args.caption_column + if caption_column not in column_names: + raise ValueError( + f"--caption_column' value '{args.caption_column}' needs to be one of: {', '.join(column_names)}" + ) + + # Preprocessing the datasets. + # We need to tokenize input captions and transform the images. + def tokenize_captions(examples, is_train=True): + captions = [] + for caption in examples[caption_column]: + if isinstance(caption, str): + captions.append(caption) + elif isinstance(caption, (list, np.ndarray)): + # take a random caption if there are multiple + captions.append(random.choice(caption) if is_train else caption[0]) + else: + raise ValueError( + f"Caption column `{caption_column}` should contain either strings or lists of strings." + ) + inputs = tokenizer( + captions, max_length=tokenizer.model_max_length, padding="max_length", truncation=True, return_tensors="pt" + ) + return inputs.input_ids + + # Preprocessing the datasets. + train_transforms = transforms.Compose( + [ + transforms.Resize(args.resolution, interpolation=transforms.InterpolationMode.BILINEAR), + transforms.CenterCrop(args.resolution) if args.center_crop else transforms.RandomCrop(args.resolution), + transforms.RandomHorizontalFlip() if args.random_flip else transforms.Lambda(lambda x: x), + transforms.ToTensor(), + transforms.Normalize([0.5], [0.5]), + ] + ) + + def preprocess_train(examples): + images = [image.convert("RGB") for image in examples[image_column]] + examples["pixel_values"] = [train_transforms(image) for image in images] + examples["input_ids"] = tokenize_captions(examples) + return examples + + with accelerator.main_process_first(): + if args.max_train_samples is not None: + dataset["train"] = dataset["train"].shuffle(seed=args.seed).select(range(args.max_train_samples)) + # Set the training transforms + train_dataset = dataset["train"].with_transform(preprocess_train) + + # for testing ips + from datasets import concatenate_datasets + train_dataset = concatenate_datasets([train_dataset for i in range(10)]) + + + def collate_fn(examples): + pixel_values = torch.stack([example["pixel_values"] for example in examples]) + pixel_values = pixel_values.to(memory_format=torch.contiguous_format).float() + input_ids = torch.stack([example["input_ids"] for example in examples]) + return {"pixel_values": pixel_values, "input_ids": input_ids} + + # DataLoaders creation: + train_dataloader = torch.utils.data.DataLoader( + train_dataset, + shuffle=True, + collate_fn=collate_fn, + batch_size=args.train_batch_size, + num_workers=args.dataloader_num_workers, + pin_memory=True, + prefetch_factor = 2 + ) + + # Scheduler and math around the number of training steps. + overrode_max_train_steps = False + num_update_steps_per_epoch = math.ceil(len(train_dataloader) / args.gradient_accumulation_steps) + if args.max_train_steps is None: + args.max_train_steps = args.num_train_epochs * num_update_steps_per_epoch + overrode_max_train_steps = True + + lr_scheduler = get_scheduler( + args.lr_scheduler, + optimizer=optimizer, + num_warmup_steps=args.lr_warmup_steps * accelerator.num_processes, + num_training_steps=args.max_train_steps * accelerator.num_processes, + ) + + # Prepare everything with our `accelerator`. + unet, optimizer, train_dataloader, lr_scheduler = accelerator.prepare( + unet, optimizer, train_dataloader, lr_scheduler + ) + + if args.use_ema: + ema_unet.to(accelerator.device) + + # For mixed precision training we cast all non-trainable weights (vae, non-lora text_encoder and non-lora unet) to half-precision + # as these weights are only used for inference, keeping weights in full precision is not required. + weight_dtype = torch.float32 + if accelerator.mixed_precision == "fp16": + weight_dtype = torch.float16 + args.mixed_precision = accelerator.mixed_precision + elif accelerator.mixed_precision == "bf16": + weight_dtype = torch.bfloat16 + args.mixed_precision = accelerator.mixed_precision + + # Move text_encode and vae to gpu and cast to weight_dtype + text_encoder.to(accelerator.device, dtype=weight_dtype) + vae.to(accelerator.device, dtype=weight_dtype) + + # We need to recalculate our total training steps as the size of the training dataloader may have changed. + num_update_steps_per_epoch = math.ceil(len(train_dataloader) / args.gradient_accumulation_steps) + if overrode_max_train_steps: + args.max_train_steps = args.num_train_epochs * num_update_steps_per_epoch + # Afterwards we recalculate our number of training epochs + args.num_train_epochs = math.ceil(args.max_train_steps / num_update_steps_per_epoch) + + # We need to initialize the trackers we use, and also store our configuration. + # The trackers initializes automatically on the main process. + if accelerator.is_main_process: + tracker_config = dict(vars(args)) + tracker_config.pop("validation_prompts") + accelerator.init_trackers(args.tracker_project_name, tracker_config) + + # Function for unwrapping if model was compiled with `torch.compile`. + def unwrap_model(model): + model = accelerator.unwrap_model(model) + model = model._orig_mod if is_compiled_module(model) else model + return model + + # Train! + total_batch_size = args.train_batch_size * accelerator.num_processes * args.gradient_accumulation_steps + + logger.info("***** Running training *****") + logger.info(f" Num examples = {len(train_dataset)}") + logger.info(f" Num Epochs = {args.num_train_epochs}") + logger.info(f" Instantaneous batch size per device = {args.train_batch_size}") + logger.info(f" Total train batch size (w. parallel, distributed & accumulation) = {total_batch_size}") + logger.info(f" Gradient Accumulation steps = {args.gradient_accumulation_steps}") + logger.info(f" Total optimization steps = {args.max_train_steps}") + global_step = 0 + first_epoch = 0 + + # Potentially load in the weights and states from a previous save + if args.resume_from_checkpoint: + if args.resume_from_checkpoint != "latest": + path = os.path.basename(args.resume_from_checkpoint) + else: + # Get the most recent checkpoint + dirs = os.listdir(args.output_dir) + dirs = [d for d in dirs if d.startswith("checkpoint")] + dirs = sorted(dirs, key=lambda x: int(x.split("-")[1])) + path = dirs[-1] if len(dirs) > 0 else None + + if path is None: + accelerator.print( + f"Checkpoint '{args.resume_from_checkpoint}' does not exist. Starting a new training run." + ) + args.resume_from_checkpoint = None + initial_global_step = 0 + else: + accelerator.print(f"Resuming from checkpoint {path}") + accelerator.load_state(os.path.join(args.output_dir, path)) + global_step = int(path.split("-")[1]) + + initial_global_step = global_step + first_epoch = global_step // num_update_steps_per_epoch + + else: + initial_global_step = 0 + + progress_bar = tqdm( + range(0, args.max_train_steps), + initial=initial_global_step, + desc="Steps", + # Only show the progress bar once on each machine. + disable=not accelerator.is_local_main_process, + ) + + if args.NHWC: + unet = unet.to(memory_format=torch.channels_last) + vae = vae.to(memory_format=torch.channels_last) + + import time + for epoch in range(first_epoch, args.num_train_epochs): + train_loss = 0.0 + iter_start = time.time() + for step, batch in enumerate(train_dataloader): + with accelerator.accumulate(unet): + # Convert images to latent space + if args.NHWC: + batch["pixel_values"] = batch["pixel_values"].to(memory_format=torch.channels_last) + latents = vae.encode(batch["pixel_values"].to(weight_dtype)).latent_dist.sample() + latents = latents * vae.config.scaling_factor + + # Sample noise that we'll add to the latents + noise = torch.randn_like(latents) + if args.noise_offset: + # https://www.crosslabs.org//blog/diffusion-with-offset-noise + noise += args.noise_offset * torch.randn( + (latents.shape[0], latents.shape[1], 1, 1), device=latents.device + ) + if args.input_perturbation: + new_noise = noise + args.input_perturbation * torch.randn_like(noise) + bsz = latents.shape[0] + # Sample a random timestep for each image + timesteps = torch.randint(0, noise_scheduler.config.num_train_timesteps, (bsz,), device=latents.device) + timesteps = timesteps.long() + + # Add noise to the latents according to the noise magnitude at each timestep + # (this is the forward diffusion process) + if args.input_perturbation: + noisy_latents = noise_scheduler.add_noise(latents, new_noise, timesteps) + else: + noisy_latents = noise_scheduler.add_noise(latents, noise, timesteps) + + # Get the text embedding for conditioning + encoder_hidden_states = text_encoder(batch["input_ids"], return_dict=False)[0] + + # Get the target for loss depending on the prediction type + if args.prediction_type is not None: + # set prediction_type of scheduler if defined + noise_scheduler.register_to_config(prediction_type=args.prediction_type) + + if noise_scheduler.config.prediction_type == "epsilon": + target = noise + elif noise_scheduler.config.prediction_type == "v_prediction": + target = noise_scheduler.get_velocity(latents, noise, timesteps) + else: + raise ValueError(f"Unknown prediction type {noise_scheduler.config.prediction_type}") + + # Predict the noise residual and compute loss + if args.NHWC: + noisy_latents = noisy_latents.to(memory_format=torch.channels_last) + # timesteps = timesteps.to(memory_format=torch.channels_last) + # encoder_hidden_states = encoder_hidden_states.to(memory_format=torch.channels_last) + model_pred = unet(noisy_latents, timesteps, encoder_hidden_states, return_dict=False)[0] + + if args.snr_gamma is None: + loss = F.mse_loss(model_pred.float(), target.float(), reduction="mean") + else: + # Compute loss-weights as per Section 3.4 of https://arxiv.org/abs/2303.09556. + # Since we predict the noise instead of x_0, the original formulation is slightly changed. + # This is discussed in Section 4.2 of the same paper. + snr = compute_snr(noise_scheduler, timesteps) + mse_loss_weights = torch.stack([snr, args.snr_gamma * torch.ones_like(timesteps)], dim=1).min( + dim=1 + )[0] + if noise_scheduler.config.prediction_type == "epsilon": + mse_loss_weights = mse_loss_weights / snr + elif noise_scheduler.config.prediction_type == "v_prediction": + mse_loss_weights = mse_loss_weights / (snr + 1) + + loss = F.mse_loss(model_pred.float(), target.float(), reduction="none") + loss = loss.mean(dim=list(range(1, len(loss.shape)))) * mse_loss_weights + loss = loss.mean() + + # Gather the losses across all processes for logging (if we use distributed training). + avg_loss = accelerator.gather(loss.repeat(args.train_batch_size)).mean() + train_loss += avg_loss.item() / args.gradient_accumulation_steps + + # Backpropagate + accelerator.backward(loss) + if accelerator.sync_gradients: + accelerator.clip_grad_norm_(unet.parameters(), args.max_grad_norm) + optimizer.step() + lr_scheduler.step() + optimizer.zero_grad() + + # Checks if the accelerator has performed an optimization step behind the scenes + if accelerator.sync_gradients: + if args.use_ema: + ema_unet.step(unet.parameters()) + progress_bar.update(1) + global_step += 1 + accelerator.log({"train_loss": train_loss}, step=global_step) + train_loss = 0.0 + iter_elapse = time.time() - iter_start + iter_start = time.time() + ips_per_device = total_batch_size / iter_elapse / accelerator.num_processes + ips_per_gpu = ips_per_device * 2 + + if global_step % args.checkpointing_steps == 0: + if accelerator.is_main_process: + # _before_ saving state, check if this save would set us over the `checkpoints_total_limit` + if args.checkpoints_total_limit is not None: + checkpoints = os.listdir(args.output_dir) + checkpoints = [d for d in checkpoints if d.startswith("checkpoint")] + checkpoints = sorted(checkpoints, key=lambda x: int(x.split("-")[1])) + + # before we save the new checkpoint, we need to have at _most_ `checkpoints_total_limit - 1` checkpoints + if len(checkpoints) >= args.checkpoints_total_limit: + num_to_remove = len(checkpoints) - args.checkpoints_total_limit + 1 + removing_checkpoints = checkpoints[0:num_to_remove] + + logger.info( + f"{len(checkpoints)} checkpoints already exist, removing {len(removing_checkpoints)} checkpoints" + ) + logger.info(f"removing checkpoints: {', '.join(removing_checkpoints)}") + + for removing_checkpoint in removing_checkpoints: + removing_checkpoint = os.path.join(args.output_dir, removing_checkpoint) + shutil.rmtree(removing_checkpoint) + + save_path = os.path.join(args.output_dir, f"checkpoint-{global_step}") + # 这段代码是为了解决NHWC时保存模型出错 + if args.NHWC: + origin_model = accelerator._models[0] + model = origin_model.to(memory_format=torch.contiguous_format) + accelerator._models[0] = model + accelerator.save_state(save_path) + logger.info(f"Saved state to {save_path}") + + logs = {"step_loss": loss.detach().item(), "lr": lr_scheduler.get_last_lr()[0], + "ips_per_device": ips_per_device, "ips_per_gpu": ips_per_gpu} + progress_bar.set_postfix(**logs) + + if global_step >= args.max_train_steps: + break + + if accelerator.is_main_process: + if args.validation_prompts is not None and epoch % args.validation_epochs == 0: + if args.use_ema: + # Store the UNet parameters temporarily and load the EMA parameters to perform inference. + ema_unet.store(unet.parameters()) + ema_unet.copy_to(unet.parameters()) + log_validation( + vae, + text_encoder, + tokenizer, + unet, + args, + accelerator, + weight_dtype, + global_step, + ) + if args.use_ema: + # Switch back to the original UNet parameters. + ema_unet.restore(unet.parameters()) + + # Create the pipeline using the trained modules and save it. + accelerator.wait_for_everyone() + if accelerator.is_main_process: + unet = unwrap_model(unet) + if args.use_ema: + ema_unet.copy_to(unet.parameters()) + + pipeline = StableDiffusionPipeline.from_pretrained( + args.pretrained_model_name_or_path, + text_encoder=text_encoder, + vae=vae.to(memory_format=torch.contiguous_format) if args.NHWC else vae, + unet=unet.to(memory_format=torch.contiguous_format) if args.NHWC else unet, + revision=args.revision, + variant=args.variant, + ) + pipeline.save_pretrained(args.output_dir) + + # Run a final round of inference. + images = [] + if args.validation_prompts is not None: + logger.info("Running inference for collecting generated images...") + pipeline = pipeline.to(accelerator.device) + pipeline.torch_dtype = weight_dtype + pipeline.set_progress_bar_config(disable=True) + + if args.enable_xformers_memory_efficient_attention: + pipeline.enable_xformers_memory_efficient_attention() + + if args.seed is None: + generator = None + else: + generator = torch.Generator(device=accelerator.device).manual_seed(args.seed) + + for i in range(len(args.validation_prompts)): + with torch.autocast("cuda"): + image = pipeline(args.validation_prompts[i], num_inference_steps=20, generator=generator).images[0] + images.append(image) + + if args.push_to_hub: + save_model_card(args, repo_id, images, repo_folder=args.output_dir) + upload_folder( + repo_id=repo_id, + folder_path=args.output_dir, + commit_message="End of training", + ignore_patterns=["step_*", "epoch_*"], + ) + + accelerator.end_training() + + +if __name__ == "__main__": + main() diff --git a/multimodal/diffusion/stable-diffusion/diffusers/train_text_to_image_sdxl.py b/multimodal/diffusion/stable-diffusion/diffusers/train_text_to_image_sdxl.py new file mode 100755 index 0000000000000000000000000000000000000000..27cdd493b42d9b2d531d6a214554c0350bfc6050 --- /dev/null +++ b/multimodal/diffusion/stable-diffusion/diffusers/train_text_to_image_sdxl.py @@ -0,0 +1,1387 @@ +# Copyright (c) 2024, Shanghai Iluvatar CoreX Semiconductor Co., Ltd. +# All Rights Reserved. +# +# Licensed under the Apache License, Version 2.0 (the "License"); you may +# not use this file except in compliance with the License. You may obtain +# a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +# License for the specific language governing permissions and limitations +# under the License. + + +#!/usr/bin/env python +# coding=utf-8 +# Copyright 2024 The HuggingFace Inc. team. All rights reserved. +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +"""Fine-tuning script for Stable Diffusion XL for text2image.""" + +import argparse +import functools +import gc +import logging +import math +import os +import random +import shutil +from pathlib import Path +import time + +import accelerate +import datasets +import numpy as np +import torch +import torch.nn.functional as F +import torch.utils.checkpoint +import transformers +from accelerate import Accelerator +from accelerate.state import AcceleratorState +from accelerate.logging import get_logger +from accelerate.utils import ProjectConfiguration, set_seed +from datasets import concatenate_datasets, load_dataset +from huggingface_hub import create_repo, upload_folder +from packaging import version +from torchvision import transforms +from torchvision.transforms.functional import crop +from tqdm.auto import tqdm +from transformers import AutoTokenizer, PretrainedConfig +from transformers.utils import ContextManagers + +import diffusers +from diffusers import AutoencoderKL, DDPMScheduler, StableDiffusionXLPipeline, UNet2DConditionModel +from diffusers.optimization import get_scheduler +from diffusers.training_utils import EMAModel, compute_snr +from diffusers.utils import check_min_version, is_wandb_available +from diffusers.utils.hub_utils import load_or_create_model_card, populate_model_card +from diffusers.utils.import_utils import is_xformers_available +from diffusers.utils.torch_utils import is_compiled_module + + +# Will error if the minimal version of diffusers is not installed. Remove at your own risks. +check_min_version("0.27.0") + +logger = get_logger(__name__) + + +DATASET_NAME_MAPPING = { + "lambdalabs/pokemon-blip-captions": ("image", "text"), +} + + +def save_model_card( + repo_id: str, + images: list = None, + validation_prompt: str = None, + base_model: str = None, + dataset_name: str = None, + repo_folder: str = None, + vae_path: str = None, +): + img_str = "" + if images is not None: + for i, image in enumerate(images): + image.save(os.path.join(repo_folder, f"image_{i}.png")) + img_str += f"![img_{i}](./image_{i}.png)\n" + + model_description = f""" +# Text-to-image finetuning - {repo_id} + +This pipeline was finetuned from **{base_model}** on the **{dataset_name}** dataset. Below are some example images generated with the finetuned pipeline using the following prompt: {validation_prompt}: \n +{img_str} + +Special VAE used for training: {vae_path}. +""" + + model_card = load_or_create_model_card( + repo_id_or_path=repo_id, + from_training=True, + license="creativeml-openrail-m", + base_model=base_model, + model_description=model_description, + inference=True, + ) + + tags = [ + "stable-diffusion-xl", + "stable-diffusion-xl-diffusers", + "text-to-image", + "diffusers-training", + "diffusers", + ] + model_card = populate_model_card(model_card, tags=tags) + + model_card.save(os.path.join(repo_folder, "README.md")) + + +def import_model_class_from_model_name_or_path( + pretrained_model_name_or_path: str, revision: str, subfolder: str = "text_encoder" +): + text_encoder_config = PretrainedConfig.from_pretrained( + pretrained_model_name_or_path, subfolder=subfolder, revision=revision + ) + model_class = text_encoder_config.architectures[0] + + if model_class == "CLIPTextModel": + from transformers import CLIPTextModel + + return CLIPTextModel + elif model_class == "CLIPTextModelWithProjection": + from transformers import CLIPTextModelWithProjection + + return CLIPTextModelWithProjection + else: + raise ValueError(f"{model_class} is not supported.") + + +def parse_args(input_args=None): + parser = argparse.ArgumentParser(description="Simple example of a training script.") + parser.add_argument( + "--pretrained_model_name_or_path", + type=str, + default=None, + required=True, + help="Path to pretrained model or model identifier from huggingface.co/models.", + ) + parser.add_argument( + "--pretrained_vae_model_name_or_path", + type=str, + default=None, + help="Path to pretrained VAE model with better numerical stability. More details: https://github.com/huggingface/diffusers/pull/4038.", + ) + parser.add_argument( + "--revision", + type=str, + default=None, + required=False, + help="Revision of pretrained model identifier from huggingface.co/models.", + ) + parser.add_argument( + "--variant", + type=str, + default=None, + help="Variant of the model files of the pretrained model identifier from huggingface.co/models, 'e.g.' fp16", + ) + parser.add_argument( + "--dataset_name", + type=str, + default=None, + help=( + "The name of the Dataset (from the HuggingFace hub) to train on (could be your own, possibly private," + " dataset). It can also be a path pointing to a local copy of a dataset in your filesystem," + " or to a folder containing files that 🤗 Datasets can understand." + ), + ) + parser.add_argument( + "--dataset_config_name", + type=str, + default=None, + help="The config of the Dataset, leave as None if there's only one config.", + ) + parser.add_argument( + "--train_data_dir", + type=str, + default=None, + help=( + "A folder containing the training data. Folder contents must follow the structure described in" + " https://huggingface.co/docs/datasets/image_dataset#imagefolder. In particular, a `metadata.jsonl` file" + " must exist to provide the captions for the images. Ignored if `dataset_name` is specified." + ), + ) + parser.add_argument( + "--image_column", type=str, default="image", help="The column of the dataset containing an image." + ) + parser.add_argument( + "--caption_column", + type=str, + default="text", + help="The column of the dataset containing a caption or a list of captions.", + ) + parser.add_argument( + "--validation_prompt", + type=str, + default=None, + help="A prompt that is used during validation to verify that the model is learning.", + ) + parser.add_argument( + "--num_validation_images", + type=int, + default=4, + help="Number of images that should be generated during validation with `validation_prompt`.", + ) + parser.add_argument( + "--validation_epochs", + type=int, + default=1, + help=( + "Run fine-tuning validation every X epochs. The validation process consists of running the prompt" + " `args.validation_prompt` multiple times: `args.num_validation_images`." + ), + ) + parser.add_argument( + "--max_train_samples", + type=int, + default=None, + help=( + "For debugging purposes or quicker training, truncate the number of training examples to this " + "value if set." + ), + ) + parser.add_argument( + "--proportion_empty_prompts", + type=float, + default=0, + help="Proportion of image prompts to be replaced with empty strings. Defaults to 0 (no prompt replacement).", + ) + parser.add_argument( + "--output_dir", + type=str, + default="sdxl-model-finetuned", + help="The output directory where the model predictions and checkpoints will be written.", + ) + parser.add_argument( + "--cache_dir", + type=str, + default=None, + help="The directory where the downloaded models and datasets will be stored.", + ) + parser.add_argument("--seed", type=int, default=None, help="A seed for reproducible training.") + parser.add_argument( + "--resolution", + type=int, + default=1024, + help=( + "The resolution for input images, all the images in the train/validation dataset will be resized to this" + " resolution" + ), + ) + parser.add_argument( + "--center_crop", + default=False, + action="store_true", + help=( + "Whether to center crop the input images to the resolution. If not set, the images will be randomly" + " cropped. The images will be resized to the resolution first before cropping." + ), + ) + parser.add_argument( + "--random_flip", + action="store_true", + help="whether to randomly flip images horizontally", + ) + parser.add_argument( + "--train_batch_size", type=int, default=16, help="Batch size (per device) for the training dataloader." + ) + parser.add_argument("--num_train_epochs", type=int, default=100) + parser.add_argument( + "--max_train_steps", + type=int, + default=None, + help="Total number of training steps to perform. If provided, overrides num_train_epochs.", + ) + parser.add_argument( + "--checkpointing_steps", + type=int, + default=500, + help=( + "Save a checkpoint of the training state every X updates. These checkpoints can be used both as final" + " checkpoints in case they are better than the last checkpoint, and are also suitable for resuming" + " training using `--resume_from_checkpoint`." + ), + ) + parser.add_argument( + "--checkpoints_total_limit", + type=int, + default=None, + help=("Max number of checkpoints to store."), + ) + parser.add_argument( + "--resume_from_checkpoint", + type=str, + default=None, + help=( + "Whether training should be resumed from a previous checkpoint. Use a path saved by" + ' `--checkpointing_steps`, or `"latest"` to automatically select the last available checkpoint.' + ), + ) + parser.add_argument( + "--gradient_accumulation_steps", + type=int, + default=1, + help="Number of updates steps to accumulate before performing a backward/update pass.", + ) + parser.add_argument( + "--gradient_checkpointing", + action="store_true", + help="Whether or not to use gradient checkpointing to save memory at the expense of slower backward pass.", + ) + parser.add_argument( + "--learning_rate", + type=float, + default=1e-4, + help="Initial learning rate (after the potential warmup period) to use.", + ) + parser.add_argument( + "--scale_lr", + action="store_true", + default=False, + help="Scale the learning rate by the number of GPUs, gradient accumulation steps, and batch size.", + ) + parser.add_argument( + "--lr_scheduler", + type=str, + default="constant", + help=( + 'The scheduler type to use. Choose between ["linear", "cosine", "cosine_with_restarts", "polynomial",' + ' "constant", "constant_with_warmup"]' + ), + ) + parser.add_argument( + "--lr_warmup_steps", type=int, default=500, help="Number of steps for the warmup in the lr scheduler." + ) + parser.add_argument( + "--timestep_bias_strategy", + type=str, + default="none", + choices=["earlier", "later", "range", "none"], + help=( + "The timestep bias strategy, which may help direct the model toward learning low or high frequency details." + " Choices: ['earlier', 'later', 'range', 'none']." + " The default is 'none', which means no bias is applied, and training proceeds normally." + " The value of 'later' will increase the frequency of the model's final training timesteps." + ), + ) + parser.add_argument( + "--timestep_bias_multiplier", + type=float, + default=1.0, + help=( + "The multiplier for the bias. Defaults to 1.0, which means no bias is applied." + " A value of 2.0 will double the weight of the bias, and a value of 0.5 will halve it." + ), + ) + parser.add_argument( + "--timestep_bias_begin", + type=int, + default=0, + help=( + "When using `--timestep_bias_strategy=range`, the beginning (inclusive) timestep to bias." + " Defaults to zero, which equates to having no specific bias." + ), + ) + parser.add_argument( + "--timestep_bias_end", + type=int, + default=1000, + help=( + "When using `--timestep_bias_strategy=range`, the final timestep (inclusive) to bias." + " Defaults to 1000, which is the number of timesteps that Stable Diffusion is trained on." + ), + ) + parser.add_argument( + "--timestep_bias_portion", + type=float, + default=0.25, + help=( + "The portion of timesteps to bias. Defaults to 0.25, which 25% of timesteps will be biased." + " A value of 0.5 will bias one half of the timesteps. The value provided for `--timestep_bias_strategy` determines" + " whether the biased portions are in the earlier or later timesteps." + ), + ) + parser.add_argument( + "--snr_gamma", + type=float, + default=None, + help="SNR weighting gamma to be used if rebalancing the loss. Recommended value is 5.0. " + "More details here: https://arxiv.org/abs/2303.09556.", + ) + parser.add_argument("--use_ema", action="store_true", help="Whether to use EMA model.") + parser.add_argument( + "--allow_tf32", + action="store_true", + help=( + "Whether or not to allow TF32 on Ampere GPUs. Can be used to speed up training. For more information, see" + " https://pytorch.org/docs/stable/notes/cuda.html#tensorfloat-32-tf32-on-ampere-devices" + ), + ) + parser.add_argument( + "--dataloader_num_workers", + type=int, + default=0, + help=( + "Number of subprocesses to use for data loading. 0 means that the data will be loaded in the main process." + ), + ) + parser.add_argument( + "--use_8bit_adam", action="store_true", help="Whether or not to use 8-bit Adam from bitsandbytes." + ) + parser.add_argument("--adam_beta1", type=float, default=0.9, help="The beta1 parameter for the Adam optimizer.") + parser.add_argument("--adam_beta2", type=float, default=0.999, help="The beta2 parameter for the Adam optimizer.") + parser.add_argument("--adam_weight_decay", type=float, default=1e-2, help="Weight decay to use.") + parser.add_argument("--adam_epsilon", type=float, default=1e-08, help="Epsilon value for the Adam optimizer") + parser.add_argument("--max_grad_norm", default=1.0, type=float, help="Max gradient norm.") + parser.add_argument("--push_to_hub", action="store_true", help="Whether or not to push the model to the Hub.") + parser.add_argument("--hub_token", type=str, default=None, help="The token to use to push to the Model Hub.") + parser.add_argument( + "--prediction_type", + type=str, + default=None, + help="The prediction_type that shall be used for training. Choose between 'epsilon' or 'v_prediction' or leave `None`. If left to `None` the default prediction type of the scheduler: `noise_scheduler.config.prediction_type` is chosen.", + ) + parser.add_argument( + "--hub_model_id", + type=str, + default=None, + help="The name of the repository to keep in sync with the local `output_dir`.", + ) + parser.add_argument( + "--logging_dir", + type=str, + default="logs", + help=( + "[TensorBoard](https://www.tensorflow.org/tensorboard) log directory. Will default to" + " *output_dir/runs/**CURRENT_DATETIME_HOSTNAME***." + ), + ) + parser.add_argument( + "--report_to", + type=str, + default="tensorboard", + help=( + 'The integration to report the results and logs to. Supported platforms are `"tensorboard"`' + ' (default), `"wandb"` and `"comet_ml"`. Use `"all"` to report to all integrations.' + ), + ) + parser.add_argument( + "--mixed_precision", + type=str, + default=None, + choices=["no", "fp16", "bf16"], + help=( + "Whether to use mixed precision. Choose between fp16 and bf16 (bfloat16). Bf16 requires PyTorch >=" + " 1.10.and an Nvidia Ampere GPU. Default to the value of accelerate config of the current system or the" + " flag passed with the `accelerate.launch` command. Use this argument to override the accelerate config." + ), + ) + parser.add_argument("--local_rank", type=int, default=-1, help="For distributed training: local_rank") + parser.add_argument( + "--enable_xformers_memory_efficient_attention", action="store_true", help="Whether or not to use xformers." + ) + parser.add_argument("--noise_offset", type=float, default=0, help="The scale of noise offset.") + + parser.add_argument( + "--NHWC", + action="store_true", + help="Whether or not using NHWC for training", + ) + parser.add_argument( + "--apex_fused_adam", + action="store_true", + help="Whether or not using fused_adam optimizer", + ) + + if input_args is not None: + args = parser.parse_args(input_args) + else: + args = parser.parse_args() + + env_local_rank = int(os.environ.get("LOCAL_RANK", -1)) + if env_local_rank != -1 and env_local_rank != args.local_rank: + args.local_rank = env_local_rank + + # Sanity checks + if args.dataset_name is None and args.train_data_dir is None: + raise ValueError("Need either a dataset name or a training folder.") + + if args.proportion_empty_prompts < 0 or args.proportion_empty_prompts > 1: + raise ValueError("`--proportion_empty_prompts` must be in the range [0, 1].") + + return args + + +# Adapted from pipelines.StableDiffusionXLPipeline.encode_prompt +def encode_prompt(batch, text_encoders, tokenizers, proportion_empty_prompts, caption_column, is_train=True): + prompt_embeds_list = [] + prompt_batch = batch[caption_column] + + captions = [] + for caption in prompt_batch: + if random.random() < proportion_empty_prompts: + captions.append("") + elif isinstance(caption, str): + captions.append(caption) + elif isinstance(caption, (list, np.ndarray)): + # take a random caption if there are multiple + captions.append(random.choice(caption) if is_train else caption[0]) + + with torch.no_grad(): + for tokenizer, text_encoder in zip(tokenizers, text_encoders): + text_inputs = tokenizer( + captions, + padding="max_length", + max_length=tokenizer.model_max_length, + truncation=True, + return_tensors="pt", + ) + text_input_ids = text_inputs.input_ids + prompt_embeds = text_encoder( + text_input_ids.to(text_encoder.device), + output_hidden_states=True, + return_dict=False, + ) + + # We are only ALWAYS interested in the pooled output of the final text encoder + pooled_prompt_embeds = prompt_embeds[0] + prompt_embeds = prompt_embeds[-1][-2] + bs_embed, seq_len, _ = prompt_embeds.shape + prompt_embeds = prompt_embeds.view(bs_embed, seq_len, -1) + prompt_embeds_list.append(prompt_embeds) + + prompt_embeds = torch.concat(prompt_embeds_list, dim=-1) + pooled_prompt_embeds = pooled_prompt_embeds.view(bs_embed, -1) + return {"prompt_embeds": prompt_embeds.cpu(), "pooled_prompt_embeds": pooled_prompt_embeds.cpu()} + + +def compute_vae_encodings(batch, vae): + memory_format = torch.channels_last if int(os.environ["USE_NHWC_GN"]) else torch.contiguous_format + images = batch.pop("pixel_values") + pixel_values = torch.stack(list(images)) + pixel_values = pixel_values.to(memory_format=torch.contiguous_format).float() + pixel_values = pixel_values.to(vae.device, dtype=vae.dtype, memory_format=memory_format) + + with torch.no_grad(): + model_input = vae.encode(pixel_values).latent_dist.sample() + model_input = model_input.to(memory_format=torch.contiguous_format) * vae.config.scaling_factor + return {"model_input": model_input.cpu()} + + +def generate_timestep_weights(args, num_timesteps): + weights = torch.ones(num_timesteps) + + # Determine the indices to bias + num_to_bias = int(args.timestep_bias_portion * num_timesteps) + + if args.timestep_bias_strategy == "later": + bias_indices = slice(-num_to_bias, None) + elif args.timestep_bias_strategy == "earlier": + bias_indices = slice(0, num_to_bias) + elif args.timestep_bias_strategy == "range": + # Out of the possible 1000 timesteps, we might want to focus on eg. 200-500. + range_begin = args.timestep_bias_begin + range_end = args.timestep_bias_end + if range_begin < 0: + raise ValueError( + "When using the range strategy for timestep bias, you must provide a beginning timestep greater or equal to zero." + ) + if range_end > num_timesteps: + raise ValueError( + "When using the range strategy for timestep bias, you must provide an ending timestep smaller than the number of timesteps." + ) + bias_indices = slice(range_begin, range_end) + else: # 'none' or any other string + return weights + if args.timestep_bias_multiplier <= 0: + return ValueError( + "The parameter --timestep_bias_multiplier is not intended to be used to disable the training of specific timesteps." + " If it was intended to disable timestep bias, use `--timestep_bias_strategy none` instead." + " A timestep bias multiplier less than or equal to 0 is not allowed." + ) + + # Apply the bias + weights[bias_indices] *= args.timestep_bias_multiplier + + # Normalize + weights /= weights.sum() + + return weights + + +def main(args): + if int(os.environ.get("USE_NHWC_GN", 0)): + assert args.NHWC, "USE_NHWC_GN requires NHWC to be true" + assert int(os.supports_bytes_environ) + if args.report_to == "wandb" and args.hub_token is not None: + raise ValueError( + "You cannot use both --report_to=wandb and --hub_token due to a security risk of exposing your token." + " Please use `huggingface-cli login` to authenticate with the Hub." + ) + + logging_dir = Path(args.output_dir, args.logging_dir) + + accelerator_project_config = ProjectConfiguration(project_dir=args.output_dir, logging_dir=logging_dir) + + accelerator = Accelerator( + gradient_accumulation_steps=args.gradient_accumulation_steps, + mixed_precision=args.mixed_precision, + log_with=args.report_to, + project_config=accelerator_project_config, + ) + + if args.report_to == "wandb": + if not is_wandb_available(): + raise ImportError("Make sure to install wandb if you want to use it for logging during training.") + import wandb + + # Make one log on every process with the configuration for debugging. + logging.basicConfig( + format="%(asctime)s - %(levelname)s - %(name)s - %(message)s", + datefmt="%m/%d/%Y %H:%M:%S", + level=logging.INFO, + ) + logger.info(accelerator.state, main_process_only=False) + if accelerator.is_local_main_process: + datasets.utils.logging.set_verbosity_warning() + transformers.utils.logging.set_verbosity_warning() + diffusers.utils.logging.set_verbosity_info() + else: + datasets.utils.logging.set_verbosity_error() + transformers.utils.logging.set_verbosity_error() + diffusers.utils.logging.set_verbosity_error() + + # If passed along, set the training seed now. + if args.seed is not None: + set_seed(args.seed) + + # Handle the repository creation + if accelerator.is_main_process: + if args.output_dir is not None: + os.makedirs(args.output_dir, exist_ok=True) + + if args.push_to_hub: + repo_id = create_repo( + repo_id=args.hub_model_id or Path(args.output_dir).name, exist_ok=True, token=args.hub_token + ).repo_id + + # Load the tokenizers + tokenizer_one = AutoTokenizer.from_pretrained( + args.pretrained_model_name_or_path, + subfolder="tokenizer", + revision=args.revision, + use_fast=False, + ) + tokenizer_two = AutoTokenizer.from_pretrained( + args.pretrained_model_name_or_path, + subfolder="tokenizer_2", + revision=args.revision, + use_fast=False, + ) + + # import correct text encoder classes + text_encoder_cls_one = import_model_class_from_model_name_or_path( + args.pretrained_model_name_or_path, args.revision + ) + text_encoder_cls_two = import_model_class_from_model_name_or_path( + args.pretrained_model_name_or_path, args.revision, subfolder="text_encoder_2" + ) + + # Load scheduler and models + noise_scheduler = DDPMScheduler.from_pretrained(args.pretrained_model_name_or_path, subfolder="scheduler") + + def deepspeed_zero_init_disabled_context_manager(): + """ + returns either a context list that includes one that will disable zero.Init or an empty context list + """ + deepspeed_plugin = AcceleratorState().deepspeed_plugin if accelerate.state.is_initialized() else None + if deepspeed_plugin is None: + return [] + + return [deepspeed_plugin.zero3_init_context_manager(enable=False)] + + vae_path = ( + args.pretrained_model_name_or_path + if args.pretrained_vae_model_name_or_path is None + else args.pretrained_vae_model_name_or_path + ) + + with ContextManagers(deepspeed_zero_init_disabled_context_manager()): + # Check for terminal SNR in combination with SNR Gamma + text_encoder_one = text_encoder_cls_one.from_pretrained( + args.pretrained_model_name_or_path, subfolder="text_encoder", revision=args.revision, variant=args.variant + ) + text_encoder_two = text_encoder_cls_two.from_pretrained( + args.pretrained_model_name_or_path, subfolder="text_encoder_2", revision=args.revision, variant=args.variant + ) + # vae 因为需要用float32的缘故，其中的attn部分需要用native实现，因为flash-attn 不支持float32 + origin_attn = os.environ.get("USE_NATIVE_ATTN", 0) + os.environ["USE_NATIVE_ATTN"] = "1" + vae = AutoencoderKL.from_pretrained( + vae_path, + subfolder="vae" if args.pretrained_vae_model_name_or_path is None else None, + revision=args.revision, + variant=args.variant, + ) + os.environ["USE_NATIVE_ATTN"] = origin_attn + unet = UNet2DConditionModel.from_pretrained( + args.pretrained_model_name_or_path, subfolder="unet", revision=args.revision, variant=args.variant + ) + + # Freeze vae and text encoders. + vae.requires_grad_(False) + text_encoder_one.requires_grad_(False) + text_encoder_two.requires_grad_(False) + # Set unet as trainable. + unet.train() + + # For mixed precision training we cast all non-trainable weights to half-precision + # as these weights are only used for inference, keeping weights in full precision is not required. + weight_dtype = torch.float32 + if accelerator.mixed_precision == "fp16": + weight_dtype = torch.float16 + elif accelerator.mixed_precision == "bf16": + weight_dtype = torch.bfloat16 + + # Move unet, vae and text_encoder to device and cast to weight_dtype + # The VAE is in float32 to avoid NaN losses. + vae.to(accelerator.device, dtype=torch.float32) + text_encoder_one.to(accelerator.device, dtype=weight_dtype) + text_encoder_two.to(accelerator.device, dtype=weight_dtype) + + # Create EMA for the unet. + if args.use_ema: + ema_unet = UNet2DConditionModel.from_pretrained( + args.pretrained_model_name_or_path, subfolder="unet", revision=args.revision, variant=args.variant + ) + ema_unet = EMAModel(ema_unet.parameters(), model_cls=UNet2DConditionModel, model_config=ema_unet.config) + + if args.enable_xformers_memory_efficient_attention: + if is_xformers_available(): + import xformers + + xformers_version = version.parse(xformers.__version__) + if xformers_version == version.parse("0.0.16"): + logger.warning( + "xFormers 0.0.16 cannot be used for training in some GPUs. If you observe problems during training, please update xFormers to at least 0.0.17. See https://huggingface.co/docs/diffusers/main/en/optimization/xformers for more details." + ) + unet.enable_xformers_memory_efficient_attention() + else: + raise ValueError("xformers is not available. Make sure it is installed correctly") + + # `accelerate` 0.16.0 will have better support for customized saving + if version.parse(accelerate.__version__) >= version.parse("0.16.0"): + # create custom saving & loading hooks so that `accelerator.save_state(...)` serializes in a nice format + def save_model_hook(models, weights, output_dir): + if accelerator.is_main_process: + if args.use_ema: + ema_unet.save_pretrained(os.path.join(output_dir, "unet_ema")) + + for i, model in enumerate(models): + model.save_pretrained(os.path.join(output_dir, "unet")) + + # make sure to pop weight so that corresponding model is not saved again + weights.pop() + + def load_model_hook(models, input_dir): + if args.use_ema: + load_model = EMAModel.from_pretrained(os.path.join(input_dir, "unet_ema"), UNet2DConditionModel) + ema_unet.load_state_dict(load_model.state_dict()) + ema_unet.to(accelerator.device) + del load_model + + for _ in range(len(models)): + # pop models so that they are not loaded again + model = models.pop() + + # load diffusers style into model + load_model = UNet2DConditionModel.from_pretrained(input_dir, subfolder="unet") + model.register_to_config(**load_model.config) + + model.load_state_dict(load_model.state_dict()) + del load_model + + accelerator.register_save_state_pre_hook(save_model_hook) + accelerator.register_load_state_pre_hook(load_model_hook) + + if args.gradient_checkpointing: + unet.enable_gradient_checkpointing() + + # Enable TF32 for faster training on Ampere GPUs, + # cf https://pytorch.org/docs/stable/notes/cuda.html#tensorfloat-32-tf32-on-ampere-devices + if args.allow_tf32: + torch.backends.cuda.matmul.allow_tf32 = True + + if args.scale_lr: + args.learning_rate = ( + args.learning_rate * args.gradient_accumulation_steps * args.train_batch_size * accelerator.num_processes + ) + + # Use 8-bit Adam for lower memory usage or to fine-tune the model in 16GB GPUs + if args.use_8bit_adam: + try: + import bitsandbytes as bnb + except ImportError: + raise ImportError( + "To use 8-bit Adam, please install the bitsandbytes library: `pip install bitsandbytes`." + ) + + optimizer_class = bnb.optim.AdamW8bit + elif args.apex_fused_adam: + import apex + optimizer_class = apex.optimizers.FusedAdam + else: + optimizer_class = torch.optim.AdamW + + # Optimizer creation + params_to_optimize = unet.parameters() + optimizer = optimizer_class( + params_to_optimize, + lr=args.learning_rate, + betas=(args.adam_beta1, args.adam_beta2), + weight_decay=args.adam_weight_decay, + eps=args.adam_epsilon, + ) + + # Get the datasets: you can either provide your own training and evaluation files (see below) + # or specify a Dataset from the hub (the dataset will be downloaded automatically from the datasets Hub). + + # In distributed training, the load_dataset function guarantees that only one local process can concurrently + # download the dataset. + if args.dataset_name is not None: + # Downloading and loading a dataset from the hub. + dataset = load_dataset( + args.dataset_name, + args.dataset_config_name, + cache_dir=args.cache_dir, + ) + else: + data_files = {} + if args.train_data_dir is not None: + data_files["train"] = os.path.join(args.train_data_dir, "**") + dataset = load_dataset( + "imagefolder", + data_files=data_files, + cache_dir=args.cache_dir, + ) + # See more about loading custom images at + # https://huggingface.co/docs/datasets/v2.4.0/en/image_load#imagefolder + + # Preprocessing the datasets. + # We need to tokenize inputs and targets. + column_names = dataset["train"].column_names + + # 6. Get the column names for input/target. + dataset_columns = DATASET_NAME_MAPPING.get(args.dataset_name, None) + if args.image_column is None: + image_column = dataset_columns[0] if dataset_columns is not None else column_names[0] + else: + image_column = args.image_column + if image_column not in column_names: + raise ValueError( + f"--image_column' value '{args.image_column}' needs to be one of: {', '.join(column_names)}" + ) + if args.caption_column is None: + caption_column = dataset_columns[1] if dataset_columns is not None else column_names[1] + else: + caption_column = args.caption_column + if caption_column not in column_names: + raise ValueError( + f"--caption_column' value '{args.caption_column}' needs to be one of: {', '.join(column_names)}" + ) + + # Preprocessing the datasets. + train_resize = transforms.Resize(args.resolution, interpolation=transforms.InterpolationMode.BILINEAR) + train_crop = transforms.CenterCrop(args.resolution) if args.center_crop else transforms.RandomCrop(args.resolution) + train_flip = transforms.RandomHorizontalFlip(p=1.0) + train_transforms = transforms.Compose([transforms.ToTensor(), transforms.Normalize([0.5], [0.5])]) + + def preprocess_train(examples): + images = [image.convert("RGB") for image in examples[image_column]] + # image aug + original_sizes = [] + all_images = [] + crop_top_lefts = [] + for image in images: + original_sizes.append((image.height, image.width)) + image = train_resize(image) + if args.random_flip and random.random() < 0.5: + # flip + image = train_flip(image) + if args.center_crop: + y1 = max(0, int(round((image.height - args.resolution) / 2.0))) + x1 = max(0, int(round((image.width - args.resolution) / 2.0))) + image = train_crop(image) + else: + y1, x1, h, w = train_crop.get_params(image, (args.resolution, args.resolution)) + image = crop(image, y1, x1, h, w) + crop_top_left = (y1, x1) + crop_top_lefts.append(crop_top_left) + image = train_transforms(image) + all_images.append(image) + + examples["original_sizes"] = original_sizes + examples["crop_top_lefts"] = crop_top_lefts + examples["pixel_values"] = all_images + return examples + + with accelerator.main_process_first(): + if args.max_train_samples is not None: + dataset["train"] = dataset["train"].shuffle(seed=args.seed).select(range(args.max_train_samples)) + # Set the training transforms + train_dataset = dataset["train"].with_transform(preprocess_train) + + # Let's first compute all the embeddings so that we can free up the text encoders + # from memory. We will pre-compute the VAE encodings too. + text_encoders = [text_encoder_one, text_encoder_two] + tokenizers = [tokenizer_one, tokenizer_two] + compute_embeddings_fn = functools.partial( + encode_prompt, + text_encoders=text_encoders, + tokenizers=tokenizers, + proportion_empty_prompts=args.proportion_empty_prompts, + caption_column=args.caption_column, + ) + compute_vae_encodings_fn = functools.partial(compute_vae_encodings, vae=vae) + with accelerator.main_process_first(): + from datasets.fingerprint import Hasher + + # fingerprint used by the cache for the other processes to load the result + # details: https://github.com/huggingface/diffusers/pull/4038#discussion_r1266078401 + new_fingerprint = Hasher.hash(args) + new_fingerprint_for_vae = Hasher.hash(vae_path) + train_dataset_with_embeddings = train_dataset.map( + compute_embeddings_fn, batched=True, new_fingerprint=new_fingerprint + ) + train_dataset_with_vae = train_dataset.map( + compute_vae_encodings_fn, + batched=True, + # batch_size=args.train_batch_size * accelerator.num_processes * args.gradient_accumulation_steps,\ + batch_size=args.train_batch_size, + new_fingerprint=new_fingerprint_for_vae, + ) + precomputed_dataset = concatenate_datasets( + [train_dataset_with_embeddings, train_dataset_with_vae.remove_columns(["image", "text"])], axis=1 + ) + precomputed_dataset = precomputed_dataset.with_transform(preprocess_train) + + del text_encoders, tokenizers, vae + gc.collect() + torch.cuda.empty_cache() + + def collate_fn(examples): + model_input = torch.stack([torch.tensor(example["model_input"]) for example in examples]) + original_sizes = [example["original_sizes"] for example in examples] + crop_top_lefts = [example["crop_top_lefts"] for example in examples] + prompt_embeds = torch.stack([torch.tensor(example["prompt_embeds"]) for example in examples]) + pooled_prompt_embeds = torch.stack([torch.tensor(example["pooled_prompt_embeds"]) for example in examples]) + + return { + "model_input": model_input, + "prompt_embeds": prompt_embeds, + "pooled_prompt_embeds": pooled_prompt_embeds, + "original_sizes": original_sizes, + "crop_top_lefts": crop_top_lefts, + } + + # DataLoaders creation: + # for testing ips + precomputed_dataset = concatenate_datasets([precomputed_dataset for i in range(10)]) + + train_dataloader = torch.utils.data.DataLoader( + precomputed_dataset, + shuffle=True, + collate_fn=collate_fn, + batch_size=args.train_batch_size, + num_workers=args.dataloader_num_workers, + ) + + # Scheduler and math around the number of training steps. + overrode_max_train_steps = False + num_update_steps_per_epoch = math.ceil(len(train_dataloader) / args.gradient_accumulation_steps) + if args.max_train_steps is None: + args.max_train_steps = args.num_train_epochs * num_update_steps_per_epoch + overrode_max_train_steps = True + + lr_scheduler = get_scheduler( + args.lr_scheduler, + optimizer=optimizer, + num_warmup_steps=args.lr_warmup_steps * args.gradient_accumulation_steps, + num_training_steps=args.max_train_steps * args.gradient_accumulation_steps, + ) + + # Prepare everything with our `accelerator`. + unet, optimizer, train_dataloader, lr_scheduler = accelerator.prepare( + unet, optimizer, train_dataloader, lr_scheduler + ) + + if args.use_ema: + ema_unet.to(accelerator.device) + + # We need to recalculate our total training steps as the size of the training dataloader may have changed. + num_update_steps_per_epoch = math.ceil(len(train_dataloader) / args.gradient_accumulation_steps) + if overrode_max_train_steps: + args.max_train_steps = args.num_train_epochs * num_update_steps_per_epoch + # Afterwards we recalculate our number of training epochs + args.num_train_epochs = math.ceil(args.max_train_steps / num_update_steps_per_epoch) + + # We need to initialize the trackers we use, and also store our configuration. + # The trackers initializes automatically on the main process. + if accelerator.is_main_process: + accelerator.init_trackers("text2image-fine-tune-sdxl", config=vars(args)) + + # Function for unwrapping if torch.compile() was used in accelerate. + def unwrap_model(model): + model = accelerator.unwrap_model(model) + model = model._orig_mod if is_compiled_module(model) else model + return model + + # Train! + total_batch_size = args.train_batch_size * accelerator.num_processes * args.gradient_accumulation_steps + + logger.info("***** Running training *****") + logger.info(f" Num examples = {len(precomputed_dataset)}") + logger.info(f" Num Epochs = {args.num_train_epochs}") + logger.info(f" Instantaneous batch size per device = {args.train_batch_size}") + logger.info(f" Total train batch size (w. parallel, distributed & accumulation) = {total_batch_size}") + logger.info(f" Gradient Accumulation steps = {args.gradient_accumulation_steps}") + logger.info(f" Total optimization steps = {args.max_train_steps}") + global_step = 0 + first_epoch = 0 + + # Potentially load in the weights and states from a previous save + if args.resume_from_checkpoint: + if args.resume_from_checkpoint != "latest": + path = os.path.basename(args.resume_from_checkpoint) + else: + # Get the most recent checkpoint + dirs = os.listdir(args.output_dir) + dirs = [d for d in dirs if d.startswith("checkpoint")] + dirs = sorted(dirs, key=lambda x: int(x.split("-")[1])) + path = dirs[-1] if len(dirs) > 0 else None + + if path is None: + accelerator.print( + f"Checkpoint '{args.resume_from_checkpoint}' does not exist. Starting a new training run." + ) + args.resume_from_checkpoint = None + initial_global_step = 0 + else: + accelerator.print(f"Resuming from checkpoint {path}") + accelerator.load_state(os.path.join(args.output_dir, path)) + global_step = int(path.split("-")[1]) + + initial_global_step = global_step + first_epoch = global_step // num_update_steps_per_epoch + + else: + initial_global_step = 0 + + progress_bar = tqdm( + range(0, args.max_train_steps), + initial=initial_global_step, + desc="Steps", + # Only show the progress bar once on each machine. + disable=not accelerator.is_local_main_process, + ) + + if args.NHWC: + unet = unet.to(memory_format=torch.channels_last) + + for epoch in range(first_epoch, args.num_train_epochs): + train_loss = 0.0 + iter_start = time.time() + for step, batch in enumerate(train_dataloader): + with accelerator.accumulate(unet): + # Sample noise that we'll add to the latents + model_input = batch["model_input"].to(accelerator.device) + noise = torch.randn_like(model_input) + if args.noise_offset: + # https://www.crosslabs.org//blog/diffusion-with-offset-noise + noise += args.noise_offset * torch.randn( + (model_input.shape[0], model_input.shape[1], 1, 1), device=model_input.device + ) + + bsz = model_input.shape[0] + if args.timestep_bias_strategy == "none": + # Sample a random timestep for each image without bias. + timesteps = torch.randint( + 0, noise_scheduler.config.num_train_timesteps, (bsz,), device=model_input.device + ) + else: + # Sample a random timestep for each image, potentially biased by the timestep weights. + # Biasing the timestep weights allows us to spend less time training irrelevant timesteps. + weights = generate_timestep_weights(args, noise_scheduler.config.num_train_timesteps).to( + model_input.device + ) + timesteps = torch.multinomial(weights, bsz, replacement=True).long() + + # Add noise to the model input according to the noise magnitude at each timestep + # (this is the forward diffusion process) + noisy_model_input = noise_scheduler.add_noise(model_input, noise, timesteps) + + # time ids + def compute_time_ids(original_size, crops_coords_top_left): + # Adapted from pipeline.StableDiffusionXLPipeline._get_add_time_ids + target_size = (args.resolution, args.resolution) + add_time_ids = list(original_size + crops_coords_top_left + target_size) + add_time_ids = torch.tensor([add_time_ids]) + add_time_ids = add_time_ids.to(accelerator.device, dtype=weight_dtype) + return add_time_ids + + add_time_ids = torch.cat( + [compute_time_ids(s, c) for s, c in zip(batch["original_sizes"], batch["crop_top_lefts"])] + ) + + # Predict the noise residual + unet_added_conditions = {"time_ids": add_time_ids} + prompt_embeds = batch["prompt_embeds"].to(accelerator.device) + pooled_prompt_embeds = batch["pooled_prompt_embeds"].to(accelerator.device) + unet_added_conditions.update({"text_embeds": pooled_prompt_embeds}) + + if args.NHWC: + noisy_model_input = noisy_model_input.to(memory_format=torch.channels_last) + model_pred = unet( + noisy_model_input, + timesteps, + prompt_embeds, + added_cond_kwargs=unet_added_conditions, + return_dict=False, + )[0] + + # Get the target for loss depending on the prediction type + if args.prediction_type is not None: + # set prediction_type of scheduler if defined + noise_scheduler.register_to_config(prediction_type=args.prediction_type) + + if noise_scheduler.config.prediction_type == "epsilon": + target = noise + elif noise_scheduler.config.prediction_type == "v_prediction": + target = noise_scheduler.get_velocity(model_input, noise, timesteps) + elif noise_scheduler.config.prediction_type == "sample": + # We set the target to latents here, but the model_pred will return the noise sample prediction. + target = model_input + # We will have to subtract the noise residual from the prediction to get the target sample. + model_pred = model_pred - noise + else: + raise ValueError(f"Unknown prediction type {noise_scheduler.config.prediction_type}") + + if args.snr_gamma is None: + loss = F.mse_loss(model_pred.float(), target.float(), reduction="mean") + else: + # Compute loss-weights as per Section 3.4 of https://arxiv.org/abs/2303.09556. + # Since we predict the noise instead of x_0, the original formulation is slightly changed. + # This is discussed in Section 4.2 of the same paper. + snr = compute_snr(noise_scheduler, timesteps) + mse_loss_weights = torch.stack([snr, args.snr_gamma * torch.ones_like(timesteps)], dim=1).min( + dim=1 + )[0] + if noise_scheduler.config.prediction_type == "epsilon": + mse_loss_weights = mse_loss_weights / snr + elif noise_scheduler.config.prediction_type == "v_prediction": + mse_loss_weights = mse_loss_weights / (snr + 1) + + loss = F.mse_loss(model_pred.float(), target.float(), reduction="none") + loss = loss.mean(dim=list(range(1, len(loss.shape)))) * mse_loss_weights + loss = loss.mean() + + # Gather the losses across all processes for logging (if we use distributed training). + avg_loss = accelerator.gather(loss.repeat(args.train_batch_size)).mean() + train_loss += avg_loss.item() / args.gradient_accumulation_steps + + # Backpropagate + accelerator.backward(loss) + if accelerator.sync_gradients: + params_to_clip = unet.parameters() + accelerator.clip_grad_norm_(params_to_clip, args.max_grad_norm) + optimizer.step() + lr_scheduler.step() + optimizer.zero_grad() + + # Checks if the accelerator has performed an optimization step behind the scenes + if accelerator.sync_gradients: + if args.use_ema: + ema_unet.step(unet.parameters()) + progress_bar.update(1) + global_step += 1 + accelerator.log({"train_loss": train_loss}, step=global_step) + train_loss = 0.0 + iter_elapse = time.time() - iter_start + iter_start = time.time() + ips_per_device = total_batch_size / iter_elapse / accelerator.num_processes + ips_per_gpu = ips_per_device * 2 + + if accelerator.is_main_process: + if global_step % args.checkpointing_steps == 0: + # _before_ saving state, check if this save would set us over the `checkpoints_total_limit` + if args.checkpoints_total_limit is not None: + checkpoints = os.listdir(args.output_dir) + checkpoints = [d for d in checkpoints if d.startswith("checkpoint")] + checkpoints = sorted(checkpoints, key=lambda x: int(x.split("-")[1])) + + # before we save the new checkpoint, we need to have at _most_ `checkpoints_total_limit - 1` checkpoints + if len(checkpoints) >= args.checkpoints_total_limit: + num_to_remove = len(checkpoints) - args.checkpoints_total_limit + 1 + removing_checkpoints = checkpoints[0:num_to_remove] + + logger.info( + f"{len(checkpoints)} checkpoints already exist, removing {len(removing_checkpoints)} checkpoints" + ) + logger.info(f"removing checkpoints: {', '.join(removing_checkpoints)}") + + for removing_checkpoint in removing_checkpoints: + removing_checkpoint = os.path.join(args.output_dir, removing_checkpoint) + shutil.rmtree(removing_checkpoint) + + save_path = os.path.join(args.output_dir, f"checkpoint-{global_step}") + #if args.NHWC: + # origin_model = accelerator._models[0] + # model = origin_model.to(memory_format=torch.contiguous_format) + # accelerator._models[0] = model + + accelerator.save_state(save_path) + logger.info(f"Saved state to {save_path}") + + logs = {"step_loss": loss.detach().item(), "lr": lr_scheduler.get_last_lr()[0], + "ips_per_device": ips_per_device, "ips_per_gpu": ips_per_gpu} + progress_bar.set_postfix(**logs) + + if global_step >= args.max_train_steps: + break + + if accelerator.is_main_process: + if args.validation_prompt is not None and epoch % args.validation_epochs == 0: + logger.info( + f"Running validation... \n Generating {args.num_validation_images} images with prompt:" + f" {args.validation_prompt}." + ) + if args.use_ema: + # Store the UNet parameters temporarily and load the EMA parameters to perform inference. + ema_unet.store(unet.parameters()) + ema_unet.copy_to(unet.parameters()) + + # create pipeline + vae = AutoencoderKL.from_pretrained( + vae_path, + subfolder="vae" if args.pretrained_vae_model_name_or_path is None else None, + revision=args.revision, + variant=args.variant, + ) + pipeline = StableDiffusionXLPipeline.from_pretrained( + args.pretrained_model_name_or_path, + vae=vae, + unet=accelerator.unwrap_model(unet), + revision=args.revision, + variant=args.variant, + torch_dtype=weight_dtype, + ) + if args.prediction_type is not None: + scheduler_args = {"prediction_type": args.prediction_type} + pipeline.scheduler = pipeline.scheduler.from_config(pipeline.scheduler.config, **scheduler_args) + + pipeline = pipeline.to(accelerator.device) + pipeline.set_progress_bar_config(disable=True) + + # run inference + generator = torch.Generator(device=accelerator.device).manual_seed(args.seed) if args.seed else None + pipeline_args = {"prompt": args.validation_prompt} + + with torch.cuda.amp.autocast(): + images = [ + pipeline(**pipeline_args, generator=generator, num_inference_steps=25).images[0] + for _ in range(args.num_validation_images) + ] + + for tracker in accelerator.trackers: + if tracker.name == "tensorboard": + np_images = np.stack([np.asarray(img) for img in images]) + tracker.writer.add_images("validation", np_images, epoch, dataformats="NHWC") + if tracker.name == "wandb": + tracker.log( + { + "validation": [ + wandb.Image(image, caption=f"{i}: {args.validation_prompt}") + for i, image in enumerate(images) + ] + } + ) + + del pipeline + torch.cuda.empty_cache() + + accelerator.wait_for_everyone() + if accelerator.is_main_process: + unet = unwrap_model(unet) + if args.use_ema: + ema_unet.copy_to(unet.parameters()) + + # Serialize pipeline. + vae = AutoencoderKL.from_pretrained( + vae_path, + subfolder="vae" if args.pretrained_vae_model_name_or_path is None else None, + revision=args.revision, + variant=args.variant, + torch_dtype=weight_dtype, + ) + pipeline = StableDiffusionXLPipeline.from_pretrained( + args.pretrained_model_name_or_path, + unet=unet, + vae=vae, + revision=args.revision, + variant=args.variant, + torch_dtype=weight_dtype, + ) + if args.prediction_type is not None: + scheduler_args = {"prediction_type": args.prediction_type} + pipeline.scheduler = pipeline.scheduler.from_config(pipeline.scheduler.config, **scheduler_args) + pipeline.save_pretrained(args.output_dir) + + # run inference + images = [] + if args.validation_prompt and args.num_validation_images > 0: + pipeline = pipeline.to(accelerator.device) + generator = torch.Generator(device=accelerator.device).manual_seed(args.seed) if args.seed else None + with torch.cuda.amp.autocast(): + images = [ + pipeline(args.validation_prompt, num_inference_steps=25, generator=generator).images[0] + for _ in range(args.num_validation_images) + ] + + for tracker in accelerator.trackers: + if tracker.name == "tensorboard": + np_images = np.stack([np.asarray(img) for img in images]) + tracker.writer.add_images("test", np_images, epoch, dataformats="NHWC") + if tracker.name == "wandb": + tracker.log( + { + "test": [ + wandb.Image(image, caption=f"{i}: {args.validation_prompt}") + for i, image in enumerate(images) + ] + } + ) + + if args.push_to_hub: + save_model_card( + repo_id=repo_id, + images=images, + validation_prompt=args.validation_prompt, + base_model=args.pretrained_model_name_or_path, + dataset_name=args.dataset_name, + repo_folder=args.output_dir, + vae_path=args.pretrained_vae_model_name_or_path, + ) + upload_folder( + repo_id=repo_id, + folder_path=args.output_dir, + commit_message="End of training", + ignore_patterns=["step_*", "epoch_*"], + ) + + accelerator.end_training() + + +if __name__ == "__main__": + args = parse_args() + main(args)