From 4523f853fe47592db30ab3e03e89fb917db68464 Mon Sep 17 00:00:00 2001
From: Volpeon <git@volpeon.ink>
Date: Sun, 27 Nov 2022 17:19:46 +0100
Subject: Generic loading of scheduler (training)

---
 dreambooth.py | 29 +++++++++--------------------
 1 file changed, 9 insertions(+), 20 deletions(-)

(limited to 'dreambooth.py')

diff --git a/dreambooth.py b/dreambooth.py
index 2b8a35e..a266d83 100644
--- a/dreambooth.py
+++ b/dreambooth.py
@@ -387,6 +387,7 @@ class Checkpointer:
         ema_unet,
         tokenizer,
         text_encoder,
+        scheduler,
         output_dir: Path,
         instance_identifier,
         placeholder_token,
@@ -403,6 +404,7 @@ class Checkpointer:
         self.ema_unet = ema_unet
         self.tokenizer = tokenizer
         self.text_encoder = text_encoder
+        self.scheduler = scheduler
         self.output_dir = output_dir
         self.instance_identifier = instance_identifier
         self.placeholder_token = placeholder_token
@@ -445,9 +447,7 @@ class Checkpointer:
             vae=self.vae,
             unet=unwrapped_unet,
             tokenizer=self.tokenizer,
-            scheduler=PNDMScheduler(
-                beta_start=0.00085, beta_end=0.012, beta_schedule="scaled_linear", skip_prk_steps=True
-            ),
+            scheduler=self.scheduler,
         )
         pipeline.save_pretrained(self.output_dir.joinpath("model"))
 
@@ -466,16 +466,12 @@ class Checkpointer:
             self.ema_unet.averaged_model if self.ema_unet is not None else self.unet)
         unwrapped_text_encoder = self.accelerator.unwrap_model(self.text_encoder)
 
-        scheduler = DPMSolverMultistepScheduler(
-            beta_start=0.00085, beta_end=0.012, beta_schedule="scaled_linear"
-        )
-
         pipeline = VlpnStableDiffusion(
             text_encoder=unwrapped_text_encoder,
             vae=self.vae,
             unet=unwrapped_unet,
             tokenizer=self.tokenizer,
-            scheduler=scheduler,
+            scheduler=self.scheduler,
         ).to(self.accelerator.device)
         pipeline.set_progress_bar_config(dynamic_ncols=True)
 
@@ -587,6 +583,9 @@ def main():
     text_encoder = CLIPTextModel.from_pretrained(args.pretrained_model_name_or_path, subfolder='text_encoder')
     vae = AutoencoderKL.from_pretrained(args.pretrained_model_name_or_path, subfolder='vae')
     unet = UNet2DConditionModel.from_pretrained(args.pretrained_model_name_or_path, subfolder='unet')
+    noise_scheduler = DDPMScheduler.from_pretrained(args.pretrained_model_name_or_path, subfolder='scheduler')
+    checkpoint_scheduler = DPMSolverMultistepScheduler.from_pretrained(
+        args.pretrained_model_name_or_path, subfolder='scheduler')
 
     unet.set_use_memory_efficient_attention_xformers(True)
 
@@ -690,13 +689,6 @@ def main():
         eps=args.adam_epsilon,
     )
 
-    noise_scheduler = DDPMScheduler(
-        beta_start=0.00085,
-        beta_end=0.012,
-        beta_schedule="scaled_linear",
-        num_train_timesteps=args.noise_timesteps
-    )
-
     weight_dtype = torch.float32
     if args.mixed_precision == "fp16":
         weight_dtype = torch.float16
@@ -755,16 +747,12 @@ def main():
                 for i in range(0, len(missing_data), args.sample_batch_size)
             ]
 
-            scheduler = DPMSolverMultistepScheduler(
-                beta_start=0.00085, beta_end=0.012, beta_schedule="scaled_linear"
-            )
-
             pipeline = VlpnStableDiffusion(
                 text_encoder=text_encoder,
                 vae=vae,
                 unet=unet,
                 tokenizer=tokenizer,
-                scheduler=scheduler,
+                scheduler=checkpoint_scheduler,
             ).to(accelerator.device)
             pipeline.set_progress_bar_config(dynamic_ncols=True)
 
@@ -876,6 +864,7 @@ def main():
         ema_unet=ema_unet,
         tokenizer=tokenizer,
         text_encoder=text_encoder,
+        scheduler=checkpoint_scheduler,
         output_dir=basepath,
         instance_identifier=instance_identifier,
         placeholder_token=args.placeholder_token,
-- 
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