Merge branch 'dev' of https://github.com/kohya-ss/sd-scripts into sch…

…edule_free

fine_tune.py

@@ -356,7 +356,7 @@ def fn_recursive_set_mem_eff(module: torch.nn.Module):
 
                 # Sample noise, sample a random timestep for each image, and add noise to the latents,
                 # with noise offset and/or multires noise if specified
-                noise, noisy_latents, timesteps = train_util.get_noise_noisy_latents_and_timesteps(args, noise_scheduler, latents)
+                noise, noisy_latents, timesteps, huber_c = train_util.get_noise_noisy_latents_and_timesteps(args, noise_scheduler, latents)
 
                 # Predict the noise residual
                 with accelerator.autocast():
@@ -370,7 +370,7 @@ def fn_recursive_set_mem_eff(module: torch.nn.Module):
 
                 if args.min_snr_gamma or args.scale_v_pred_loss_like_noise_pred or args.debiased_estimation_loss:
                     # do not mean over batch dimension for snr weight or scale v-pred loss
-                    loss = torch.nn.functional.mse_loss(noise_pred.float(), target.float(), reduction="none")
+                    loss = train_util.conditional_loss(noise_pred.float(), target.float(), reduction="none", loss_type=args.loss_type, huber_c=huber_c)
                     loss = loss.mean([1, 2, 3])
 
                     if args.min_snr_gamma:
@@ -382,7 +382,7 @@ def fn_recursive_set_mem_eff(module: torch.nn.Module):
 
                     loss = loss.mean()  # mean over batch dimension
                 else:
-                    loss = torch.nn.functional.mse_loss(noise_pred.float(), target.float(), reduction="mean")
+                    loss = train_util.conditional_loss(noise_pred.float(), target.float(), reduction="mean", loss_type=args.loss_type, huber_c=huber_c)
 
                 accelerator.backward(loss)
                 if accelerator.sync_gradients and args.max_grad_norm != 0.0:
@@ -523,6 +523,7 @@ def setup_parser() -> argparse.ArgumentParser:
     parser = setup_parser()
 
     args = parser.parse_args()
+    train_util.verify_command_line_training_args(args)
     args = train_util.read_config_from_file(args, parser)
 
     train(args)

library/train_util.py

@@ -1890,7 +1890,7 @@ def __init__(
                 subset.image_dir,
                 False,
                 None,
-                subset.caption_extension, 
+                subset.caption_extension,
                 subset.cache_info,
                 subset.num_repeats,
                 subset.shuffle_caption,
@@ -3236,6 +3236,27 @@ def add_training_arguments(parser: argparse.ArgumentParser, support_dreambooth:
         default=None,
         help="set maximum time step for U-Net training (1~1000, default is 1000) / U-Net学習時のtime stepの最大値を設定する（1~1000で指定、省略時はデフォルト値(1000)）",
     )
+    parser.add_argument(
+        "--loss_type",
+        type=str,
+        default="l2",
+        choices=["l2", "huber", "smooth_l1"],
+        help="The type of loss function to use (L2, Huber, or smooth L1), default is L2 / 使用する損失関数の種類（L2、Huber、またはsmooth L1）、デフォルトはL2",
+    )
+    parser.add_argument(
+        "--huber_schedule",
+        type=str,
+        default="exponential",
+        choices=["constant", "exponential", "snr"],
+        help="The scheduling method for Huber loss (constant, exponential, or SNR-based). Only used when loss_type is 'huber' or 'smooth_l1'. default is exponential"
+        + " / Huber損失のスケジューリング方法（constant、exponential、またはSNRベース）。loss_typeが'huber'または'smooth_l1'の場合に有効、デフォルトはexponential",
+    )
+    parser.add_argument(
+        "--huber_c",
+        type=float,
+        default=0.1,
+        help="The huber loss parameter. Only used if one of the huber loss modes (huber or smooth l1) is selected with loss_type. default is 0.1 / Huber損失のパラメータ。loss_typeがhuberまたはsmooth l1の場合に有効。デフォルトは0.1",
+    )
 
     parser.add_argument(
         "--lowram",
@@ -3358,6 +3379,60 @@ def add_masked_loss_arguments(parser: argparse.ArgumentParser):
     )
 
 
+# verify command line args for training
+def verify_command_line_training_args(args: argparse.Namespace):
+    # if wandb is enabled, the command line is exposed to the public
+    # check whether sensitive options are included in the command line arguments
+    # if so, warn or inform the user to move them to the configuration file
+    # wandbが有効な場合、コマンドラインが公開される
+    # 学習用のコマンドライン引数に敏感なオプションが含まれているかどうかを確認し、
+    # 含まれている場合は設定ファイルに移動するようにユーザーに警告または通知する
+
+    wandb_enabled = args.log_with is not None and args.log_with != "tensorboard"  # "all" or "wandb"
+    if not wandb_enabled:
+        return
+
+    sensitive_args = ["wandb_api_key", "huggingface_token"]
+    sensitive_path_args = [
+        "pretrained_model_name_or_path",
+        "vae",
+        "tokenizer_cache_dir",
+        "train_data_dir",
+        "conditioning_data_dir",
+        "reg_data_dir",
+        "output_dir",
+        "logging_dir",
+    ]
+
+    for arg in sensitive_args:
+        if getattr(args, arg, None) is not None:
+            logger.warning(
+                f"wandb is enabled, but option `{arg}` is included in the command line. Because the command line is exposed to the public, it is recommended to move it to the `.toml` file."
+                + f" / wandbが有効で、かつオプション `{arg}` がコマンドラインに含まれています。コマンドラインは公開されるため、`.toml`ファイルに移動することをお勧めします。"
+            )
+
+    # if path is absolute, it may include sensitive information
+    for arg in sensitive_path_args:
+        if getattr(args, arg, None) is not None and os.path.isabs(getattr(args, arg)):
+            logger.info(
+                f"wandb is enabled, but option `{arg}` is included in the command line and it is an absolute path. Because the command line is exposed to the public, it is recommended to move it to the `.toml` file or use relative path."
+                + f" / wandbが有効で、かつオプション `{arg}` がコマンドラインに含まれており、絶対パスです。コマンドラインは公開されるため、`.toml`ファイルに移動するか、相対パスを使用することをお勧めします。"
+            )
+
+    if getattr(args, "config_file", None) is not None:
+        logger.info(
+            f"wandb is enabled, but option `config_file` is included in the command line. Because the command line is exposed to the public, please be careful about the information included in the path."
+            + f" / wandbが有効で、かつオプション `config_file` がコマンドラインに含まれています。コマンドラインは公開されるため、パスに含まれる情報にご注意ください。"
+        )
+
+    # other sensitive options
+    if args.huggingface_repo_id is not None and args.huggingface_repo_visibility != "public":
+        logger.info(
+            f"wandb is enabled, but option huggingface_repo_id is included in the command line and huggingface_repo_visibility is not 'public'. Because the command line is exposed to the public, it is recommended to move it to the `.toml` file."
+            + f" / wandbが有効で、かつオプション huggingface_repo_id がコマンドラインに含まれており、huggingface_repo_visibility が 'public' ではありません。コマンドラインは公開されるため、`.toml`ファイルに移動することをお勧めします。"
+        )
+
+
 def verify_training_args(args: argparse.Namespace):
     r"""
     Verify training arguments. Also reflect highvram option to global variable
@@ -4804,6 +4879,38 @@ def save_sd_model_on_train_end_common(
             huggingface_util.upload(args, out_dir, "/" + model_name, force_sync_upload=True)
 
 
+def get_timesteps_and_huber_c(args, min_timestep, max_timestep, noise_scheduler, b_size, device):
+
+    # TODO: if a huber loss is selected, it will use constant timesteps for each batch
+    # as. In the future there may be a smarter way
+
+    if args.loss_type == "huber" or args.loss_type == "smooth_l1":
+        timesteps = torch.randint(min_timestep, max_timestep, (1,), device="cpu")
+        timestep = timesteps.item()
+
+        if args.huber_schedule == "exponential":
+            alpha = -math.log(args.huber_c) / noise_scheduler.config.num_train_timesteps
+            huber_c = math.exp(-alpha * timestep)
+        elif args.huber_schedule == "snr":
+            alphas_cumprod = noise_scheduler.alphas_cumprod[timestep]
+            sigmas = ((1.0 - alphas_cumprod) / alphas_cumprod) ** 0.5
+            huber_c = (1 - args.huber_c) / (1 + sigmas) ** 2 + args.huber_c
+        elif args.huber_schedule == "constant":
+            huber_c = args.huber_c
+        else:
+            raise NotImplementedError(f"Unknown Huber loss schedule {args.huber_schedule}!")
+
+        timesteps = timesteps.repeat(b_size).to(device)
+    elif args.loss_type == "l2":
+        timesteps = torch.randint(min_timestep, max_timestep, (b_size,), device=device)
+        huber_c = 1  # may be anything, as it's not used
+    else:
+        raise NotImplementedError(f"Unknown loss type {args.loss_type}")
+    timesteps = timesteps.long()
+
+    return timesteps, huber_c
+
+
 def get_noise_noisy_latents_and_timesteps(args, noise_scheduler, latents):
     # Sample noise that we'll add to the latents
     noise = torch.randn_like(latents, device=latents.device)
@@ -4823,8 +4930,7 @@ def get_noise_noisy_latents_and_timesteps(args, noise_scheduler, latents):
     min_timestep = 0 if args.min_timestep is None else args.min_timestep
     max_timestep = noise_scheduler.config.num_train_timesteps if args.max_timestep is None else args.max_timestep
 
-    timesteps = torch.randint(min_timestep, max_timestep, (b_size,), device=latents.device)
-    timesteps = timesteps.long()
+    timesteps, huber_c = get_timesteps_and_huber_c(args, min_timestep, max_timestep, noise_scheduler, b_size, latents.device)
 
     # Add noise to the latents according to the noise magnitude at each timestep
     # (this is the forward diffusion process)
@@ -4837,7 +4943,31 @@ def get_noise_noisy_latents_and_timesteps(args, noise_scheduler, latents):
     else:
         noisy_latents = noise_scheduler.add_noise(latents, noise, timesteps)
 
-    return noise, noisy_latents, timesteps
+    return noise, noisy_latents, timesteps, huber_c
+
+
+# NOTE: if you're using the scheduled version, huber_c has to depend on the timesteps already
+def conditional_loss(
+    model_pred: torch.Tensor, target: torch.Tensor, reduction: str = "mean", loss_type: str = "l2", huber_c: float = 0.1
+):
+
+    if loss_type == "l2":
+        loss = torch.nn.functional.mse_loss(model_pred, target, reduction=reduction)
+    elif loss_type == "huber":
+        loss = 2 * huber_c * (torch.sqrt((model_pred - target) ** 2 + huber_c**2) - huber_c)
+        if reduction == "mean":
+            loss = torch.mean(loss)
+        elif reduction == "sum":
+            loss = torch.sum(loss)
+    elif loss_type == "smooth_l1":
+        loss = 2 * (torch.sqrt((model_pred - target) ** 2 + huber_c**2) - huber_c)
+        if reduction == "mean":
+            loss = torch.mean(loss)
+        elif reduction == "sum":
+            loss = torch.sum(loss)
+    else:
+        raise NotImplementedError(f"Unsupported Loss Type {loss_type}")
+    return loss
 
 
 def append_lr_to_logs(logs, lr_scheduler, optimizer_type, including_unet=True):

sdxl_train.py

@@ -584,7 +584,7 @@ def fn_recursive_set_mem_eff(module: torch.nn.Module):
 
                 # Sample noise, sample a random timestep for each image, and add noise to the latents,
                 # with noise offset and/or multires noise if specified
-                noise, noisy_latents, timesteps = train_util.get_noise_noisy_latents_and_timesteps(args, noise_scheduler, latents)
+                noise, noisy_latents, timesteps, huber_c = train_util.get_noise_noisy_latents_and_timesteps(args, noise_scheduler, latents)
 
                 noisy_latents = noisy_latents.to(weight_dtype)  # TODO check why noisy_latents is not weight_dtype
 
@@ -602,7 +602,7 @@ def fn_recursive_set_mem_eff(module: torch.nn.Module):
                     or args.masked_loss
                 ):
                     # do not mean over batch dimension for snr weight or scale v-pred loss
-                    loss = torch.nn.functional.mse_loss(noise_pred.float(), target.float(), reduction="none")
+                    loss = train_util.conditional_loss(noise_pred.float(), target.float(), reduction="none", loss_type=args.loss_type, huber_c=huber_c)
                     if args.masked_loss:
                         loss = apply_masked_loss(loss, batch)
                     loss = loss.mean([1, 2, 3])
@@ -618,7 +618,7 @@ def fn_recursive_set_mem_eff(module: torch.nn.Module):
 
                     loss = loss.mean()  # mean over batch dimension
                 else:
-                    loss = torch.nn.functional.mse_loss(noise_pred.float(), target.float(), reduction="mean")
+                    loss = train_util.conditional_loss(noise_pred.float(), target.float(), reduction="mean", loss_type=args.loss_type, huber_c=huber_c)
 
                 accelerator.backward(loss)
                 if accelerator.sync_gradients and args.max_grad_norm != 0.0:
@@ -815,6 +815,7 @@ def setup_parser() -> argparse.ArgumentParser:
     parser = setup_parser()
 
     args = parser.parse_args()
+    train_util.verify_command_line_training_args(args)
     args = train_util.read_config_from_file(args, parser)
 
     train(args)

sdxl_train_control_net_lllite.py

@@ -443,7 +443,7 @@ def remove_model(old_ckpt_name):
 
                 # Sample noise, sample a random timestep for each image, and add noise to the latents,
                 # with noise offset and/or multires noise if specified
-                noise, noisy_latents, timesteps = train_util.get_noise_noisy_latents_and_timesteps(args, noise_scheduler, latents)
+                noise, noisy_latents, timesteps, huber_c = train_util.get_noise_noisy_latents_and_timesteps(args, noise_scheduler, latents)
 
                 noisy_latents = noisy_latents.to(weight_dtype)  # TODO check why noisy_latents is not weight_dtype
 
@@ -462,7 +462,7 @@ def remove_model(old_ckpt_name):
                 else:
                     target = noise
 
-                loss = torch.nn.functional.mse_loss(noise_pred.float(), target.float(), reduction="none")
+                loss = train_util.conditional_loss(noise_pred.float(), target.float(), reduction="none", loss_type=args.loss_type, huber_c=huber_c)
                 loss = loss.mean([1, 2, 3])
 
                 loss_weights = batch["loss_weights"]  # 各sampleごとのweight
@@ -617,6 +617,7 @@ def setup_parser() -> argparse.ArgumentParser:
     parser = setup_parser()
 
     args = parser.parse_args()
+    train_util.verify_command_line_training_args(args)
     args = train_util.read_config_from_file(args, parser)
 
     train(args)

sdxl_train_control_net_lllite_old.py

@@ -410,7 +410,7 @@ def remove_model(old_ckpt_name):
 
                 # Sample noise, sample a random timestep for each image, and add noise to the latents,
                 # with noise offset and/or multires noise if specified
-                noise, noisy_latents, timesteps = train_util.get_noise_noisy_latents_and_timesteps(args, noise_scheduler, latents)
+                noise, noisy_latents, timesteps, huber_c = train_util.get_noise_noisy_latents_and_timesteps(args, noise_scheduler, latents)
 
                 noisy_latents = noisy_latents.to(weight_dtype)  # TODO check why noisy_latents is not weight_dtype
 
@@ -430,7 +430,7 @@ def remove_model(old_ckpt_name):
                 else:
                     target = noise
 
-                loss = torch.nn.functional.mse_loss(noise_pred.float(), target.float(), reduction="none")
+                loss = train_util.conditional_loss(noise_pred.float(), target.float(), reduction="none", loss_type=args.loss_type, huber_c=huber_c)
                 loss = loss.mean([1, 2, 3])
 
                 loss_weights = batch["loss_weights"]  # 各sampleごとのweight
@@ -585,6 +585,7 @@ def setup_parser() -> argparse.ArgumentParser:
     parser = setup_parser()
 
     args = parser.parse_args()
+    train_util.verify_command_line_training_args(args)
     args = train_util.read_config_from_file(args, parser)
 
     train(args)

sdxl_train_network.py

@@ -178,6 +178,7 @@ def setup_parser() -> argparse.ArgumentParser:
     parser = setup_parser()
 
     args = parser.parse_args()
+    train_util.verify_command_line_training_args(args)
     args = train_util.read_config_from_file(args, parser)
 
     trainer = SdxlNetworkTrainer()

sdxl_train_textual_inversion.py

@@ -131,6 +131,7 @@ def setup_parser() -> argparse.ArgumentParser:
     parser = setup_parser()
 
     args = parser.parse_args()
+    train_util.verify_command_line_training_args(args)
     args = train_util.read_config_from_file(args, parser)
 
     trainer = SdxlTextualInversionTrainer()

train_controlnet.py

@@ -420,13 +420,8 @@ def remove_model(old_ckpt_name):
                     )
 
                 # Sample a random timestep for each image
-                timesteps = torch.randint(
-                    0,
-                    noise_scheduler.config.num_train_timesteps,
-                    (b_size,),
-                    device=latents.device,
-                )
-                timesteps = timesteps.long()
+                timesteps, huber_c = train_util.get_timesteps_and_huber_c(args, 0, noise_scheduler.config.num_train_timesteps, noise_scheduler, b_size, latents.device)
+
                 # Add noise to the latents according to the noise magnitude at each timestep
                 # (this is the forward diffusion process)
                 noisy_latents = noise_scheduler.add_noise(latents, noise, timesteps)
@@ -457,7 +452,7 @@ def remove_model(old_ckpt_name):
                 else:
                     target = noise
 
-                loss = torch.nn.functional.mse_loss(noise_pred.float(), target.float(), reduction="none")
+                loss = train_util.conditional_loss(noise_pred.float(), target.float(), reduction="none", loss_type=args.loss_type, huber_c=huber_c)
                 loss = loss.mean([1, 2, 3])
 
                 loss_weights = batch["loss_weights"]  # 各sampleごとのweight
@@ -617,6 +612,7 @@ def setup_parser() -> argparse.ArgumentParser:
     parser = setup_parser()
 
     args = parser.parse_args()
+    train_util.verify_command_line_training_args(args)
     args = train_util.read_config_from_file(args, parser)
 
     train(args)

train_db.py

@@ -348,7 +348,7 @@ def train(args):
 
                 # Sample noise, sample a random timestep for each image, and add noise to the latents,
                 # with noise offset and/or multires noise if specified
-                noise, noisy_latents, timesteps = train_util.get_noise_noisy_latents_and_timesteps(args, noise_scheduler, latents)
+                noise, noisy_latents, timesteps, huber_c = train_util.get_noise_noisy_latents_and_timesteps(args, noise_scheduler, latents)
 
                 # Predict the noise residual
                 with accelerator.autocast():
@@ -360,7 +360,7 @@ def train(args):
                 else:
                     target = noise
 
-                loss = torch.nn.functional.mse_loss(noise_pred.float(), target.float(), reduction="none")
+                loss = train_util.conditional_loss(noise_pred.float(), target.float(), reduction="none", loss_type=args.loss_type, huber_c=huber_c)
                 if args.masked_loss:
                     loss = apply_masked_loss(loss, batch)
                 loss = loss.mean([1, 2, 3])
@@ -526,6 +526,7 @@ def setup_parser() -> argparse.ArgumentParser:
     parser = setup_parser()
 
     args = parser.parse_args()
+    train_util.verify_command_line_training_args(args)
     args = train_util.read_config_from_file(args, parser)
 
     train(args)