minor fix (#1494)

Author: ShoufaChen

torchtitan/experiments/flux/infra/parallelize.py

@@ -143,7 +143,7 @@ def parallelize_encoders(
         fully_shard(t5_model.hf_module, **fsdp_config)
 
         if parallel_dims.dp_replicate_enabled:
-            logger.info("Applied FSDP to the T5 encoder model")
+            logger.info("Applied HSDP to the T5 encoder model")
         else:
             logger.info("Applied FSDP to the T5 encoder model")
 

torchtitan/experiments/flux/sampling.py

@@ -172,7 +172,7 @@ def denoise(
     _, latent_channels, latent_height, latent_width = latents.shape
 
     # create denoising schedule
-    timesteps = get_schedule(denoising_steps, latent_channels, shift=True)
+    timesteps = get_schedule(denoising_steps, latent_height * latent_width, shift=True)
 
     # create positional encodings
     POSITION_DIM = 3

torchtitan/experiments/flux/train.py

@@ -126,19 +126,20 @@ def forward_backward_step(
             # Patchify: Convert latent into a sequence of patches
             latents = pack_latents(latents)
 
-        latent_noise_pred = model(
-            img=latents,
-            img_ids=latent_pos_enc,
-            txt=t5_encodings,
-            txt_ids=text_pos_enc,
-            y=clip_encodings,
-            timesteps=timesteps,
-        )
+        with self.maybe_enable_amp:
+            latent_noise_pred = model(
+                img=latents,
+                img_ids=latent_pos_enc,
+                txt=t5_encodings,
+                txt_ids=text_pos_enc,
+                y=clip_encodings,
+                timesteps=timesteps,
+            )
 
-        # Convert sequence of patches to latent shape
-        pred = unpack_latents(latent_noise_pred, latent_height, latent_width)
-        target = noise - labels
-        loss = self.loss_fn(pred, target)
+            # Convert sequence of patches to latent shape
+            pred = unpack_latents(latent_noise_pred, latent_height, latent_width)
+            target = noise - labels
+            loss = self.loss_fn(pred, target)
         # pred.shape=(bs, seq_len, vocab_size)
         # need to free to before bwd to avoid peaking memory
         del (pred, noise, target)

torchtitan/tools/utils.py

@@ -166,11 +166,11 @@ def check_if_feature_in_pytorch(
         # notify users to check if the pull request is included in their pytorch
         logger.warning(
             "Detected that the pytorch is built from source. Please make sure the PR "
-            f"({pull_request_link}) is included in pytorch for correct {feature_name}."
+            f"({pull_request}) is included in pytorch for correct {feature_name}."
         )
     elif min_nightly_version is not None and torch.__version__ < min_nightly_version:
         logger.warning(
             f"Detected that the pytorch version {torch.__version__} is older than "
             f"{min_nightly_version}. Please upgrade a newer version to include the "
-            f"change in ({pull_request_link}) for correct {feature_name}."
+            f"change in ({pull_request}) for correct {feature_name}."
         )