From 95adaea8b55d8e3755c035758bc649ae22548572 Mon Sep 17 00:00:00 2001
From: Volpeon <git@volpeon.ink>
Date: Fri, 24 Mar 2023 10:53:16 +0100
Subject: Refactoring, fixed Lora training

---
 train_lora.py | 73 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 72 insertions(+), 1 deletion(-)

(limited to 'train_lora.py')

diff --git a/train_lora.py b/train_lora.py
index 8dd3c86..fa24cee 100644
--- a/train_lora.py
+++ b/train_lora.py
@@ -11,6 +11,7 @@ import torch.utils.checkpoint
 from accelerate import Accelerator
 from accelerate.logging import get_logger
 from accelerate.utils import LoggerType, set_seed
+from peft import LoraConfig, LoraModel
 from slugify import slugify
 
 from util.files import load_config, load_embeddings_from_dir
@@ -21,6 +22,11 @@ from training.strategy.lora import lora_strategy
 from training.optimization import get_scheduler
 from training.util import save_args
 
+# https://github.com/huggingface/peft/blob/main/examples/lora_dreambooth/train_dreambooth.py
+UNET_TARGET_MODULES = ["to_q", "to_v", "query", "value"]
+TEXT_ENCODER_TARGET_MODULES = ["q_proj", "v_proj"]
+
+
 logger = get_logger(__name__)
 
 
@@ -175,6 +181,54 @@ def parse_args():
         default=1,
         help="Number of updates steps to accumulate before performing a backward/update pass.",
     )
+    parser.add_argument(
+        "--lora_r",
+        type=int,
+        default=8,
+        help="Lora rank, only used if use_lora is True"
+    )
+    parser.add_argument(
+        "--lora_alpha",
+        type=int,
+        default=32,
+        help="Lora alpha, only used if use_lora is True"
+    )
+    parser.add_argument(
+        "--lora_dropout",
+        type=float,
+        default=0.0,
+        help="Lora dropout, only used if use_lora is True"
+    )
+    parser.add_argument(
+        "--lora_bias",
+        type=str,
+        default="none",
+        help="Bias type for Lora. Can be 'none', 'all' or 'lora_only', only used if use_lora is True",
+    )
+    parser.add_argument(
+        "--lora_text_encoder_r",
+        type=int,
+        default=8,
+        help="Lora rank for text encoder, only used if `use_lora` and `train_text_encoder` are True",
+    )
+    parser.add_argument(
+        "--lora_text_encoder_alpha",
+        type=int,
+        default=32,
+        help="Lora alpha for text encoder, only used if `use_lora` and `train_text_encoder` are True",
+    )
+    parser.add_argument(
+        "--lora_text_encoder_dropout",
+        type=float,
+        default=0.0,
+        help="Lora dropout for text encoder, only used if `use_lora` and `train_text_encoder` are True",
+    )
+    parser.add_argument(
+        "--lora_text_encoder_bias",
+        type=str,
+        default="none",
+        help="Bias type for Lora. Can be 'none', 'all' or 'lora_only', only used if use_lora and `train_text_encoder` are True",
+    )
     parser.add_argument(
         "--find_lr",
         action="store_true",
@@ -424,13 +478,30 @@ def main():
     tokenizer, text_encoder, vae, unet, noise_scheduler, sample_scheduler, embeddings = get_models(
         args.pretrained_model_name_or_path)
 
+    unet_config = LoraConfig(
+        r=args.lora_r,
+        lora_alpha=args.lora_alpha,
+        target_modules=UNET_TARGET_MODULES,
+        lora_dropout=args.lora_dropout,
+        bias=args.lora_bias,
+    )
+    unet = LoraModel(unet_config, unet)
+
+    text_encoder_config = LoraConfig(
+        r=args.lora_text_encoder_r,
+        lora_alpha=args.lora_text_encoder_alpha,
+        target_modules=TEXT_ENCODER_TARGET_MODULES,
+        lora_dropout=args.lora_text_encoder_dropout,
+        bias=args.lora_text_encoder_bias,
+    )
+    text_encoder = LoraModel(text_encoder_config, text_encoder)
+
     vae.enable_slicing()
     vae.set_use_memory_efficient_attention_xformers(True)
     unet.enable_xformers_memory_efficient_attention()
 
     if args.gradient_checkpointing:
         unet.enable_gradient_checkpointing()
-        text_encoder.gradient_checkpointing_enable()
 
     if args.embeddings_dir is not None:
         embeddings_dir = Path(args.embeddings_dir)
-- 
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