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author | Volpeon <git@volpeon.ink> | 2023-02-07 20:44:43 +0100 |
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committer | Volpeon <git@volpeon.ink> | 2023-02-07 20:44:43 +0100 |
commit | 7ccd4614a56cfd6ecacba85605f338593f1059f0 (patch) | |
tree | fa9882b256c752705bc42229bac4e00ed7088643 /training/strategy/lora.py | |
parent | Restored LR finder (diff) | |
download | textual-inversion-diff-7ccd4614a56cfd6ecacba85605f338593f1059f0.tar.gz textual-inversion-diff-7ccd4614a56cfd6ecacba85605f338593f1059f0.tar.bz2 textual-inversion-diff-7ccd4614a56cfd6ecacba85605f338593f1059f0.zip |
Add Lora
Diffstat (limited to 'training/strategy/lora.py')
-rw-r--r-- | training/strategy/lora.py | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/training/strategy/lora.py b/training/strategy/lora.py new file mode 100644 index 0000000..88d1824 --- /dev/null +++ b/training/strategy/lora.py | |||
@@ -0,0 +1,147 @@ | |||
1 | from contextlib import nullcontext | ||
2 | from typing import Optional | ||
3 | from functools import partial | ||
4 | from contextlib import contextmanager, nullcontext | ||
5 | from pathlib import Path | ||
6 | |||
7 | import torch | ||
8 | import torch.nn as nn | ||
9 | from torch.utils.data import DataLoader | ||
10 | |||
11 | from accelerate import Accelerator | ||
12 | from transformers import CLIPTextModel | ||
13 | from diffusers import AutoencoderKL, UNet2DConditionModel, DPMSolverMultistepScheduler | ||
14 | from diffusers.loaders import AttnProcsLayers | ||
15 | |||
16 | from slugify import slugify | ||
17 | |||
18 | from models.clip.tokenizer import MultiCLIPTokenizer | ||
19 | from training.util import EMAModel | ||
20 | from training.functional import TrainingStrategy, TrainingCallbacks, save_samples | ||
21 | |||
22 | |||
23 | def lora_strategy_callbacks( | ||
24 | accelerator: Accelerator, | ||
25 | unet: UNet2DConditionModel, | ||
26 | text_encoder: CLIPTextModel, | ||
27 | tokenizer: MultiCLIPTokenizer, | ||
28 | vae: AutoencoderKL, | ||
29 | sample_scheduler: DPMSolverMultistepScheduler, | ||
30 | train_dataloader: DataLoader, | ||
31 | val_dataloader: Optional[DataLoader], | ||
32 | sample_output_dir: Path, | ||
33 | checkpoint_output_dir: Path, | ||
34 | seed: int, | ||
35 | lora_layers: AttnProcsLayers, | ||
36 | max_grad_norm: float = 1.0, | ||
37 | sample_batch_size: int = 1, | ||
38 | sample_num_batches: int = 1, | ||
39 | sample_num_steps: int = 20, | ||
40 | sample_guidance_scale: float = 7.5, | ||
41 | sample_image_size: Optional[int] = None, | ||
42 | ): | ||
43 | sample_output_dir.mkdir(parents=True, exist_ok=True) | ||
44 | checkpoint_output_dir.mkdir(parents=True, exist_ok=True) | ||
45 | |||
46 | weight_dtype = torch.float32 | ||
47 | if accelerator.state.mixed_precision == "fp16": | ||
48 | weight_dtype = torch.float16 | ||
49 | elif accelerator.state.mixed_precision == "bf16": | ||
50 | weight_dtype = torch.bfloat16 | ||
51 | |||
52 | save_samples_ = partial( | ||
53 | save_samples, | ||
54 | accelerator=accelerator, | ||
55 | unet=unet, | ||
56 | text_encoder=text_encoder, | ||
57 | tokenizer=tokenizer, | ||
58 | vae=vae, | ||
59 | sample_scheduler=sample_scheduler, | ||
60 | train_dataloader=train_dataloader, | ||
61 | val_dataloader=val_dataloader, | ||
62 | output_dir=sample_output_dir, | ||
63 | seed=seed, | ||
64 | batch_size=sample_batch_size, | ||
65 | num_batches=sample_num_batches, | ||
66 | num_steps=sample_num_steps, | ||
67 | guidance_scale=sample_guidance_scale, | ||
68 | image_size=sample_image_size, | ||
69 | ) | ||
70 | |||
71 | def on_prepare(): | ||
72 | lora_layers.requires_grad_(True) | ||
73 | |||
74 | def on_accum_model(): | ||
75 | return unet | ||
76 | |||
77 | @contextmanager | ||
78 | def on_train(epoch: int): | ||
79 | tokenizer.train() | ||
80 | yield | ||
81 | |||
82 | @contextmanager | ||
83 | def on_eval(): | ||
84 | tokenizer.eval() | ||
85 | yield | ||
86 | |||
87 | def on_before_optimize(lr: float, epoch: int): | ||
88 | if accelerator.sync_gradients: | ||
89 | accelerator.clip_grad_norm_(lora_layers.parameters(), max_grad_norm) | ||
90 | |||
91 | @torch.no_grad() | ||
92 | def on_checkpoint(step, postfix): | ||
93 | print(f"Saving checkpoint for step {step}...") | ||
94 | orig_unet_dtype = unet.dtype | ||
95 | unet.to(dtype=torch.float32) | ||
96 | unet.save_attn_procs(checkpoint_output_dir.joinpath(f"{step}_{postfix}")) | ||
97 | unet.to(dtype=orig_unet_dtype) | ||
98 | |||
99 | @torch.no_grad() | ||
100 | def on_sample(step): | ||
101 | orig_unet_dtype = unet.dtype | ||
102 | unet.to(dtype=weight_dtype) | ||
103 | save_samples_(step=step) | ||
104 | unet.to(dtype=orig_unet_dtype) | ||
105 | |||
106 | if torch.cuda.is_available(): | ||
107 | torch.cuda.empty_cache() | ||
108 | |||
109 | return TrainingCallbacks( | ||
110 | on_prepare=on_prepare, | ||
111 | on_accum_model=on_accum_model, | ||
112 | on_train=on_train, | ||
113 | on_eval=on_eval, | ||
114 | on_before_optimize=on_before_optimize, | ||
115 | on_checkpoint=on_checkpoint, | ||
116 | on_sample=on_sample, | ||
117 | ) | ||
118 | |||
119 | |||
120 | def lora_prepare( | ||
121 | accelerator: Accelerator, | ||
122 | text_encoder: CLIPTextModel, | ||
123 | unet: UNet2DConditionModel, | ||
124 | optimizer: torch.optim.Optimizer, | ||
125 | train_dataloader: DataLoader, | ||
126 | val_dataloader: Optional[DataLoader], | ||
127 | lr_scheduler: torch.optim.lr_scheduler._LRScheduler, | ||
128 | lora_layers: AttnProcsLayers, | ||
129 | **kwargs | ||
130 | ): | ||
131 | weight_dtype = torch.float32 | ||
132 | if accelerator.state.mixed_precision == "fp16": | ||
133 | weight_dtype = torch.float16 | ||
134 | elif accelerator.state.mixed_precision == "bf16": | ||
135 | weight_dtype = torch.bfloat16 | ||
136 | |||
137 | lora_layers, optimizer, train_dataloader, val_dataloader, lr_scheduler = accelerator.prepare( | ||
138 | lora_layers, optimizer, train_dataloader, val_dataloader, lr_scheduler) | ||
139 | unet.to(accelerator.device, dtype=weight_dtype) | ||
140 | text_encoder.to(accelerator.device, dtype=weight_dtype) | ||
141 | return text_encoder, unet, optimizer, train_dataloader, val_dataloader, lr_scheduler, {"lora_layers": lora_layers} | ||
142 | |||
143 | |||
144 | lora_strategy = TrainingStrategy( | ||
145 | callbacks=lora_strategy_callbacks, | ||
146 | prepare=lora_prepare, | ||
147 | ) | ||