Stable Diffusion 3용 멀티모달 확산 트랜스포머 (MMDiT)

RBLNSD3Transformer2DModel은 Stable Diffusion 3 모델에서 사용되는 핵심 트랜스포머 블록의 RBLN 최적화 버전입니다.

이 모델은 이전 Stable Diffusion 버전에서 사용된 UNet 아키텍처를 대체합니다. 여러 텍스트 인코더의 풀링된 임베딩 및 타임스텝 정보와 함께 잠재 이미지 표현을 처리하여 확산 프로세스를 수행합니다.

파이프라인 내 사용법

일반적으로 RBLNSD3Transformer2DModel과 직접 상호 작용하지 않습니다. 대신, RBLNStableDiffusion3Pipeline과 같은 RBLN Stable Diffusion 3 파이프라인의 일부로 자동 로드 및 관리됩니다.

RBLN SD3 파이프라인을 구성할 때 파이프라인 설정 객체의 transformer 인수를 통해 트랜스포머에 대한 특정 설정을 전달할 수 있습니다:

from optimum.rbln import RBLNStableDiffusion3PipelineConfig

# 예시: 트랜스포머에 특정 배치 크기를 사용하여 파이프라인 구성
config = RBLNStableDiffusion3PipelineConfig(
    batch_size=1, # 파이프라인 추론 배치 크기
    height=1024,
    width=1024,
    transformer=dict(
        batch_size=2 # 트랜스포머 배치 크기 (예: CFG를 위해 2배)
    )
)

# ... 이 설정을 사용하여 파이프라인 로드 ...

트랜스포머의 배치 크기에 대한 guidance scale 영향 처리를 포함한 파이프라인 사용 및 구성에 대한 자세한 내용은 Stable Diffusion 3 파이프라인 문서를 참조하십시오.

API 참조

Classes

RBLNSD3Transformer2DModel

Bases: RBLNModel

RBLN implementation of SD3Transformer2DModel for diffusion models like Stable Diffusion 3.

The SD3Transformer2DModel takes text and/or image embeddings from encoders (like CLIP) and maps them to a shared latent space that guides the diffusion process to generate the desired image.

This class inherits from [RBLNModel]. Check the superclass documentation for the generic methods the library implements for all its models.

Functions

from_model(model, config=None, rbln_config=None, model_save_dir=None, subfolder='', **kwargs) classmethod

Converts and compiles a pre-trained HuggingFace library model into a RBLN model. This method performs the actual model conversion and compilation process.

Parameters:

Name	Type	Description	Default
model	PreTrainedModel	The PyTorch model to be compiled. The object must be an instance of the HuggingFace transformers PreTrainedModel class.	required
config	Optional[PretrainedConfig]	The configuration object associated with the model.	None
rbln_config	Optional[Union[RBLNModelConfig, Dict]]	Configuration for RBLN model compilation and runtime. This can be provided as a dictionary or an instance of the model's configuration class (e.g., RBLNLlamaForCausalLMConfig for Llama models). For detailed configuration options, see the specific model's configuration class documentation.	None
kwargs	Any	Additional keyword arguments. Arguments with the prefix rbln_ are passed to rbln_config, while the remaining arguments are passed to the HuggingFace library.	{}

The method performs the following steps:

1. Compiles the PyTorch model into an optimized RBLN graph
2. Configures the model for the specified NPU device
3. Creates the necessary runtime objects if requested
4. Saves the compiled model and configurations

Returns:

Type	Description
RBLNModel	A RBLN model instance ready for inference on RBLN NPU devices.

from_pretrained(model_id, export=None, rbln_config=None, **kwargs) classmethod

The from_pretrained() function is utilized in its standard form as in the HuggingFace transformers library. User can use this function to load a pre-trained model from the HuggingFace library and convert it to a RBLN model to be run on RBLN NPUs.

Parameters:

Name	Type	Description	Default
model_id	Union[str, Path]	The model id of the pre-trained model to be loaded. It can be downloaded from the HuggingFace model hub or a local path, or a model id of a compiled model using the RBLN Compiler.	required
export	Optional[bool]	A boolean flag to indicate whether the model should be compiled. If None, it will be determined based on the existence of the compiled model files in the model_id.	None
rbln_config	Optional[Union[Dict, RBLNModelConfig]]	Configuration for RBLN model compilation and runtime. This can be provided as a dictionary or an instance of the model's configuration class (e.g., RBLNLlamaForCausalLMConfig for Llama models). For detailed configuration options, see the specific model's configuration class documentation.	None
kwargs	Any	Additional keyword arguments. Arguments with the prefix rbln_ are passed to rbln_config, while the remaining arguments are passed to the HuggingFace library.	{}

Returns:

Type	Description
RBLNModel	A RBLN model instance ready for inference on RBLN NPU devices.

save_pretrained(save_directory, push_to_hub=False, **kwargs)

Saves a model and its configuration file to a directory, so that it can be re-loaded using the [~optimum.rbln.modeling_base.RBLNBaseModel.from_pretrained] class method.

Parameters:

Name	Type	Description	Default
save_directory	Union[str, Path]	Directory where to save the model file.	required
push_to_hub	bool	Whether or not to push your model to the HuggingFace model hub after saving it.	False

Functions

Classes

RBLNSD3Transformer2DModelConfig

Bases: RBLNModelConfig

Configuration class for RBLN Stable Diffusion 3 Transformer models.

This class inherits from RBLNModelConfig and provides specific configuration options for Transformer models used in diffusion models like Stable Diffusion 3.

Functions

__init__(batch_size=None, sample_size=None, prompt_embed_length=None, **kwargs)

Parameters:

Name	Type	Description	Default
batch_size	Optional[int]	The batch size for inference. Defaults to 1.	None
sample_size	Optional[Union[int, Tuple[int, int]]]	The spatial dimensions (height, width) of the generated samples. If an integer is provided, it's used for both height and width.	None
prompt_embed_length	Optional[int]	The length of the embedded prompt vectors that will be used to condition the transformer model.	None
kwargs	Any	Additional arguments passed to the parent RBLNModelConfig.	{}

Raises:

Type	Description
ValueError	If batch_size is not a positive integer.

load(path, **kwargs) classmethod

Load a RBLNModelConfig from a path.

Parameters:

Name	Type	Description	Default
path	str	Path to the RBLNModelConfig file or directory containing the config file.	required
kwargs	Any	Additional keyword arguments to override configuration values. Keys starting with 'rbln_' will have the prefix removed and be used to update the configuration.	{}

Returns:

Name	Type	Description
RBLNModelConfig	RBLNModelConfig	The loaded configuration instance.

Note

This method loads the configuration from the specified path and applies any provided overrides. If the loaded configuration class doesn't match the expected class, a warning will be logged.