From 7505f7e843dc719622a15f4ee301609813763d77 Mon Sep 17 00:00:00 2001
From: Volpeon <git@volpeon.ink>
Date: Sun, 25 Dec 2022 23:50:24 +0100
Subject: Code simplifications, avoid autocast

---
 training/util.py | 106 +++++++++++++++++++++++++------------------------------
 1 file changed, 49 insertions(+), 57 deletions(-)

(limited to 'training')

diff --git a/training/util.py b/training/util.py
index 5c056a6..a0c15cd 100644
--- a/training/util.py
+++ b/training/util.py
@@ -60,7 +60,7 @@ class CheckpointerBase:
         self.sample_batches = sample_batches
         self.sample_batch_size = sample_batch_size
 
-    @torch.no_grad()
+    @torch.inference_mode()
     def save_samples(self, pipeline, step, num_inference_steps, guidance_scale=7.5, eta=0.0):
         samples_path = Path(self.output_dir).joinpath("samples")
 
@@ -68,65 +68,57 @@ class CheckpointerBase:
         val_data = self.datamodule.val_dataloader()
 
         generator = torch.Generator(device=pipeline.device).manual_seed(self.seed)
-        stable_latents = torch.randn(
-            (self.sample_batch_size, pipeline.unet.in_channels, self.sample_image_size // 8, self.sample_image_size // 8),
-            device=pipeline.device,
-            generator=generator,
-        )
 
         grid_cols = min(self.sample_batch_size, 4)
         grid_rows = (self.sample_batches * self.sample_batch_size) // grid_cols
 
-        with torch.autocast("cuda"), torch.inference_mode():
-            for pool, data, latents in [("stable", val_data, stable_latents), ("val", val_data, None), ("train", train_data, None)]:
-                all_samples = []
-                file_path = samples_path.joinpath(pool, f"step_{step}.jpg")
-                file_path.parent.mkdir(parents=True, exist_ok=True)
-
-                data_enum = enumerate(data)
-
-                batches = [
-                    batch
-                    for j, batch in data_enum
-                    if j * data.batch_size < self.sample_batch_size * self.sample_batches
-                ]
-                prompts = [
-                    prompt
-                    for batch in batches
-                    for prompt in batch["prompts"]
-                ]
-                nprompts = [
-                    prompt
-                    for batch in batches
-                    for prompt in batch["nprompts"]
-                ]
-
-                for i in range(self.sample_batches):
-                    prompt = prompts[i * self.sample_batch_size:(i + 1) * self.sample_batch_size]
-                    nprompt = nprompts[i * self.sample_batch_size:(i + 1) * self.sample_batch_size]
-
-                    samples = pipeline(
-                        prompt=prompt,
-                        negative_prompt=nprompt,
-                        height=self.sample_image_size,
-                        width=self.sample_image_size,
-                        image=latents[:len(prompt)] if latents is not None else None,
-                        generator=generator if latents is not None else None,
-                        guidance_scale=guidance_scale,
-                        eta=eta,
-                        num_inference_steps=num_inference_steps,
-                        output_type='pil'
-                    ).images
-
-                    all_samples += samples
-
-                    del samples
-
-                image_grid = make_grid(all_samples, grid_rows, grid_cols)
-                image_grid.save(file_path, quality=85)
-
-                del all_samples
-                del image_grid
+        for pool, data, gen in [("stable", val_data, generator), ("val", val_data, None), ("train", train_data, None)]:
+            all_samples = []
+            file_path = samples_path.joinpath(pool, f"step_{step}.jpg")
+            file_path.parent.mkdir(parents=True, exist_ok=True)
+
+            data_enum = enumerate(data)
+
+            batches = [
+                batch
+                for j, batch in data_enum
+                if j * data.batch_size < self.sample_batch_size * self.sample_batches
+            ]
+            prompts = [
+                prompt
+                for batch in batches
+                for prompt in batch["prompts"]
+            ]
+            nprompts = [
+                prompt
+                for batch in batches
+                for prompt in batch["nprompts"]
+            ]
+
+            for i in range(self.sample_batches):
+                prompt = prompts[i * self.sample_batch_size:(i + 1) * self.sample_batch_size]
+                nprompt = nprompts[i * self.sample_batch_size:(i + 1) * self.sample_batch_size]
+
+                samples = pipeline(
+                    prompt=prompt,
+                    negative_prompt=nprompt,
+                    height=self.sample_image_size,
+                    width=self.sample_image_size,
+                    generator=gen,
+                    guidance_scale=guidance_scale,
+                    eta=eta,
+                    num_inference_steps=num_inference_steps,
+                    output_type='pil'
+                ).images
+
+                all_samples += samples
+
+                del samples
+
+            image_grid = make_grid(all_samples, grid_rows, grid_cols)
+            image_grid.save(file_path, quality=85)
+
+            del all_samples
+            del image_grid
 
         del generator
-        del stable_latents
-- 
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