From 403f525d0c6900cc6844c0d2f4ecb385fc131969 Mon Sep 17 00:00:00 2001
From: Volpeon <git@volpeon.ink>
Date: Wed, 4 Jan 2023 09:40:24 +0100
Subject: Fixed reproducibility, more consistant validation

---
 train_dreambooth.py | 24 +++++++++++++++++++-----
 1 file changed, 19 insertions(+), 5 deletions(-)

(limited to 'train_dreambooth.py')

diff --git a/train_dreambooth.py b/train_dreambooth.py
index df8b54c..6d9bae8 100644
--- a/train_dreambooth.py
+++ b/train_dreambooth.py
@@ -319,6 +319,12 @@ def parse_args():
         default=1e-08,
         help="Epsilon value for the Adam optimizer"
     )
+    parser.add_argument(
+        "--adam_amsgrad",
+        type=bool,
+        default=False,
+        help="Amsgrad value for the Adam optimizer"
+    )
     parser.add_argument(
         "--mixed_precision",
         type=str,
@@ -642,7 +648,7 @@ def main():
         )
 
     if args.find_lr:
-        args.learning_rate = 1e-4
+        args.learning_rate = 1e-6
 
     # Use 8-bit Adam for lower memory usage or to fine-tune the model in 16GB GPUs
     if args.use_8bit_adam:
@@ -674,6 +680,7 @@ def main():
         betas=(args.adam_beta1, args.adam_beta2),
         weight_decay=args.adam_weight_decay,
         eps=args.adam_epsilon,
+        amsgrad=args.adam_amsgrad,
     )
 
     weight_dtype = torch.float32
@@ -730,6 +737,7 @@ def main():
         template_key=args.train_data_template,
         valid_set_size=args.valid_set_size,
         num_workers=args.dataloader_num_workers,
+        seed=args.seed,
         filter=keyword_filter,
         collate_fn=collate_fn
     )
@@ -840,7 +848,7 @@ def main():
     def on_eval():
         tokenizer.eval()
 
-    def loop(batch):
+    def loop(batch, eval: bool = False):
         # Convert images to latent space
         latents = vae.encode(batch["pixel_values"]).latent_dist.sample()
         latents = latents * 0.18215
@@ -849,8 +857,14 @@ def main():
         noise = torch.randn_like(latents)
         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_gen = torch.Generator(device=latents.device).manual_seed(args.seed) if eval else None
+        timesteps = torch.randint(
+            0,
+            noise_scheduler.config.num_train_timesteps,
+            (bsz,),
+            generator=timesteps_gen,
+            device=latents.device,
+        )
         timesteps = timesteps.long()
 
         # Add noise to the latents according to the noise magnitude at each timestep
@@ -1051,7 +1065,7 @@ def main():
 
             with torch.inference_mode():
                 for step, batch in enumerate(val_dataloader):
-                    loss, acc, bsz = loop(batch)
+                    loss, acc, bsz = loop(batch, True)
 
                     loss = loss.detach_()
                     acc = acc.detach_()
-- 
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