AI/diffusers
1
0
Fork 0
mirror of https://github.com/huggingface/diffusers.git synced 2026-01-27 17:22:53 +03:00
Code Activity

[core] FasterCache (#10163)

Browse Source 
* init

* update

* update

* update

* make style

* update

* fix

* make it work with guidance distilled models

* update

* make fix-copies

* add tests

* update

* apply_faster_cache -> apply_fastercache

* fix

* reorder

* update

* refactor

* update docs

* add fastercache to CacheMixin

* update tests

* Apply suggestions from code review

* make style

* try to fix partial import error

* Apply style fixes

* raise warning

* update

---------

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
This commit is contained in:
Aryan
2025-03-21 09:35:04 +05:30
committed by GitHub
parent 9b2c0a7dbe
commit 844221ae4e
16 changed files with 976 additions and 25 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
docs/source/en/api/cache.md
View File

@@ -38,6 +38,33 @@ config = PyramidAttentionBroadcastConfig(
pipe.transformer.enable_cache(config)
```
## Faster Cache
[FasterCache](https://huggingface.co/papers/2410.19355) from Zhengyao Lv, Chenyang Si, Junhao Song, Zhenyu Yang, Yu Qiao, Ziwei Liu, Kwan-Yee K. Wong.
FasterCache is a method that speeds up inference in diffusion transformers by:
- Reusing attention states between successive inference steps, due to high similarity between them
- Skipping unconditional branch prediction used in classifier-free guidance by revealing redundancies between unconditional and conditional branch outputs for the same timestep, and therefore approximating the unconditional branch output using the conditional branch output
```python
import torch
from diffusers import CogVideoXPipeline, FasterCacheConfig
pipe = CogVideoXPipeline.from_pretrained("THUDM/CogVideoX-5b", torch_dtype=torch.bfloat16)
pipe.to("cuda")
config = FasterCacheConfig(
spatial_attention_block_skip_range=2,
spatial_attention_timestep_skip_range=(-1, 681),
current_timestep_callback=lambda: pipe.current_timestep,
attention_weight_callback=lambda _: 0.3,
unconditional_batch_skip_range=5,
unconditional_batch_timestep_skip_range=(-1, 781),
tensor_format="BFCHW",
)
pipe.transformer.enable_cache(config)
```
### CacheMixin
[[autodoc]] CacheMixin
@@ -47,3 +74,9 @@ pipe.transformer.enable_cache(config)
[[autodoc]] PyramidAttentionBroadcastConfig
[[autodoc]] apply_pyramid_attention_broadcast
### FasterCacheConfig
[[autodoc]] FasterCacheConfig
[[autodoc]] apply_faster_cache

10
src/diffusers/__init__.py
View File

@@ -131,8 +131,10 @@ except OptionalDependencyNotAvailable:
else:
_import_structure["hooks"].extend(
[
"FasterCacheConfig",
"HookRegistry",
"PyramidAttentionBroadcastConfig",
"apply_faster_cache",
"apply_pyramid_attention_broadcast",
]
)
@@ -703,7 +705,13 @@ if TYPE_CHECKING or DIFFUSERS_SLOW_IMPORT:
except OptionalDependencyNotAvailable:
from .utils.dummy_pt_objects import * # noqa F403
else:
from .hooks import HookRegistry, PyramidAttentionBroadcastConfig, apply_pyramid_attention_broadcast
from .hooks import (
FasterCacheConfig,
HookRegistry,
PyramidAttentionBroadcastConfig,
apply_faster_cache,
apply_pyramid_attention_broadcast,
)
from .models import (
AllegroTransformer3DModel,
AsymmetricAutoencoderKL,

1
src/diffusers/hooks/__init__.py
View File

@@ -2,6 +2,7 @@ from ..utils import is_torch_available
if is_torch_available():
from .faster_cache import FasterCacheConfig, apply_faster_cache
from .group_offloading import apply_group_offloading
from .hooks import HookRegistry, ModelHook
from .layerwise_casting import apply_layerwise_casting, apply_layerwise_casting_hook

653
src/diffusers/hooks/faster_cache.py Normal file
View File

@@ -0,0 +1,653 @@
# Copyright 2024 The HuggingFace Team. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import re
from dataclasses import dataclass
from typing import Any, Callable, List, Optional, Tuple
import torch
from ..models.attention_processor import Attention, MochiAttention
from ..models.modeling_outputs import Transformer2DModelOutput
from ..utils import logging
from .hooks import HookRegistry, ModelHook
logger = logging.get_logger(__name__) # pylint: disable=invalid-name
_FASTER_CACHE_DENOISER_HOOK = "faster_cache_denoiser"
_FASTER_CACHE_BLOCK_HOOK = "faster_cache_block"
_ATTENTION_CLASSES = (Attention, MochiAttention)
_SPATIAL_ATTENTION_BLOCK_IDENTIFIERS = (
"^blocks.*attn",
"^transformer_blocks.*attn",
"^single_transformer_blocks.*attn",
)
_TEMPORAL_ATTENTION_BLOCK_IDENTIFIERS = ("^temporal_transformer_blocks.*attn",)
_TRANSFORMER_BLOCK_IDENTIFIERS = _SPATIAL_ATTENTION_BLOCK_IDENTIFIERS + _TEMPORAL_ATTENTION_BLOCK_IDENTIFIERS
_UNCOND_COND_INPUT_KWARGS_IDENTIFIERS = (
"hidden_states",
"encoder_hidden_states",
"timestep",
"attention_mask",
"encoder_attention_mask",
)
@dataclass
class FasterCacheConfig:
r"""
Configuration for [FasterCache](https://huggingface.co/papers/2410.19355).
Attributes:
spatial_attention_block_skip_range (`int`, defaults to `2`):
Calculate the attention states every `N` iterations. If this is set to `N`, the attention computation will
be skipped `N - 1` times (i.e., cached attention states will be re-used) before computing the new attention
states again.
temporal_attention_block_skip_range (`int`, *optional*, defaults to `None`):
Calculate the attention states every `N` iterations. If this is set to `N`, the attention computation will
be skipped `N - 1` times (i.e., cached attention states will be re-used) before computing the new attention
states again.
spatial_attention_timestep_skip_range (`Tuple[float, float]`, defaults to `(-1, 681)`):
The timestep range within which the spatial attention computation can be skipped without a significant loss
in quality. This is to be determined by the user based on the underlying model. The first value in the
tuple is the lower bound and the second value is the upper bound. Typically, diffusion timesteps for
denoising are in the reversed range of 0 to 1000 (i.e. denoising starts at timestep 1000 and ends at
timestep 0). For the default values, this would mean that the spatial attention computation skipping will
be applicable only after denoising timestep 681 is reached, and continue until the end of the denoising
process.
temporal_attention_timestep_skip_range (`Tuple[float, float]`, *optional*, defaults to `None`):
The timestep range within which the temporal attention computation can be skipped without a significant
loss in quality. This is to be determined by the user based on the underlying model. The first value in the
tuple is the lower bound and the second value is the upper bound. Typically, diffusion timesteps for
denoising are in the reversed range of 0 to 1000 (i.e. denoising starts at timestep 1000 and ends at
timestep 0).
low_frequency_weight_update_timestep_range (`Tuple[int, int]`, defaults to `(99, 901)`):
The timestep range within which the low frequency weight scaling update is applied. The first value in the
tuple is the lower bound and the second value is the upper bound of the timestep range. The callback
function for the update is called only within this range.
high_frequency_weight_update_timestep_range (`Tuple[int, int]`, defaults to `(-1, 301)`):
The timestep range within which the high frequency weight scaling update is applied. The first value in the
tuple is the lower bound and the second value is the upper bound of the timestep range. The callback
function for the update is called only within this range.
alpha_low_frequency (`float`, defaults to `1.1`):
The weight to scale the low frequency updates by. This is used to approximate the unconditional branch from
the conditional branch outputs.
alpha_high_frequency (`float`, defaults to `1.1`):
The weight to scale the high frequency updates by. This is used to approximate the unconditional branch
from the conditional branch outputs.
unconditional_batch_skip_range (`int`, defaults to `5`):
Process the unconditional branch every `N` iterations. If this is set to `N`, the unconditional branch
computation will be skipped `N - 1` times (i.e., cached unconditional branch states will be re-used) before
computing the new unconditional branch states again.
unconditional_batch_timestep_skip_range (`Tuple[float, float]`, defaults to `(-1, 641)`):
The timestep range within which the unconditional branch computation can be skipped without a significant
loss in quality. This is to be determined by the user based on the underlying model. The first value in the
tuple is the lower bound and the second value is the upper bound.
spatial_attention_block_identifiers (`Tuple[str, ...]`, defaults to `("blocks.*attn1", "transformer_blocks.*attn1", "single_transformer_blocks.*attn1")`):
The identifiers to match the spatial attention blocks in the model. If the name of the block contains any
of these identifiers, FasterCache will be applied to that block. This can either be the full layer names,
partial layer names, or regex patterns. Matching will always be done using a regex match.
temporal_attention_block_identifiers (`Tuple[str, ...]`, defaults to `("temporal_transformer_blocks.*attn1",)`):
The identifiers to match the temporal attention blocks in the model. If the name of the block contains any
of these identifiers, FasterCache will be applied to that block. This can either be the full layer names,
partial layer names, or regex patterns. Matching will always be done using a regex match.
attention_weight_callback (`Callable[[torch.nn.Module], float]`, defaults to `None`):
The callback function to determine the weight to scale the attention outputs by. This function should take
the attention module as input and return a float value. This is used to approximate the unconditional
branch from the conditional branch outputs. If not provided, the default weight is 0.5 for all timesteps.
Typically, as described in the paper, this weight should gradually increase from 0 to 1 as the inference
progresses. Users are encouraged to experiment and provide custom weight schedules that take into account
the number of inference steps and underlying model behaviour as denoising progresses.
low_frequency_weight_callback (`Callable[[torch.nn.Module], float]`, defaults to `None`):
The callback function to determine the weight to scale the low frequency updates by. If not provided, the
default weight is 1.1 for timesteps within the range specified (as described in the paper).
high_frequency_weight_callback (`Callable[[torch.nn.Module], float]`, defaults to `None`):
The callback function to determine the weight to scale the high frequency updates by. If not provided, the
default weight is 1.1 for timesteps within the range specified (as described in the paper).
tensor_format (`str`, defaults to `"BCFHW"`):
The format of the input tensors. This should be one of `"BCFHW"`, `"BFCHW"`, or `"BCHW"`. The format is
used to split individual latent frames in order for low and high frequency components to be computed.
is_guidance_distilled (`bool`, defaults to `False`):
Whether the model is guidance distilled or not. If the model is guidance distilled, FasterCache will not be
applied at the denoiser-level to skip the unconditional branch computation (as there is none).
_unconditional_conditional_input_kwargs_identifiers (`List[str]`, defaults to `("hidden_states", "encoder_hidden_states", "timestep", "attention_mask", "encoder_attention_mask")`):
The identifiers to match the input kwargs that contain the batchwise-concatenated unconditional and
conditional inputs. If the name of the input kwargs contains any of these identifiers, FasterCache will
split the inputs into unconditional and conditional branches. This must be a list of exact input kwargs
names that contain the batchwise-concatenated unconditional and conditional inputs.
"""
# In the paper and codebase, they hardcode these values to 2. However, it can be made configurable
# after some testing. We default to 2 if these parameters are not provided.
spatial_attention_block_skip_range: int = 2
temporal_attention_block_skip_range: Optional[int] = None
spatial_attention_timestep_skip_range: Tuple[int, int] = (-1, 681)
temporal_attention_timestep_skip_range: Tuple[int, int] = (-1, 681)
# Indicator functions for low/high frequency as mentioned in Equation 11 of the paper
low_frequency_weight_update_timestep_range: Tuple[int, int] = (99, 901)
high_frequency_weight_update_timestep_range: Tuple[int, int] = (-1, 301)
# ⍺1 and ⍺2 as mentioned in Equation 11 of the paper
alpha_low_frequency: float = 1.1
alpha_high_frequency: float = 1.1
# n as described in CFG-Cache explanation in the paper - dependant on the model
unconditional_batch_skip_range: int = 5
unconditional_batch_timestep_skip_range: Tuple[int, int] = (-1, 641)
spatial_attention_block_identifiers: Tuple[str, ...] = _SPATIAL_ATTENTION_BLOCK_IDENTIFIERS
temporal_attention_block_identifiers: Tuple[str, ...] = _TEMPORAL_ATTENTION_BLOCK_IDENTIFIERS
attention_weight_callback: Callable[[torch.nn.Module], float] = None
low_frequency_weight_callback: Callable[[torch.nn.Module], float] = None
high_frequency_weight_callback: Callable[[torch.nn.Module], float] = None
tensor_format: str = "BCFHW"
is_guidance_distilled: bool = False
current_timestep_callback: Callable[[], int] = None
_unconditional_conditional_input_kwargs_identifiers: List[str] = _UNCOND_COND_INPUT_KWARGS_IDENTIFIERS
def __repr__(self) -> str:
return (
f"FasterCacheConfig(\n"
f" spatial_attention_block_skip_range={self.spatial_attention_block_skip_range},\n"
f" temporal_attention_block_skip_range={self.temporal_attention_block_skip_range},\n"
f" spatial_attention_timestep_skip_range={self.spatial_attention_timestep_skip_range},\n"
f" temporal_attention_timestep_skip_range={self.temporal_attention_timestep_skip_range},\n"
f" low_frequency_weight_update_timestep_range={self.low_frequency_weight_update_timestep_range},\n"
f" high_frequency_weight_update_timestep_range={self.high_frequency_weight_update_timestep_range},\n"
f" alpha_low_frequency={self.alpha_low_frequency},\n"
f" alpha_high_frequency={self.alpha_high_frequency},\n"
f" unconditional_batch_skip_range={self.unconditional_batch_skip_range},\n"
f" unconditional_batch_timestep_skip_range={self.unconditional_batch_timestep_skip_range},\n"
f" spatial_attention_block_identifiers={self.spatial_attention_block_identifiers},\n"
f" temporal_attention_block_identifiers={self.temporal_attention_block_identifiers},\n"
f" tensor_format={self.tensor_format},\n"
f")"
)
class FasterCacheDenoiserState:
r"""
State for [FasterCache](https://huggingface.co/papers/2410.19355) top-level denoiser module.
"""
def __init__(self) -> None:
self.iteration: int = 0
self.low_frequency_delta: torch.Tensor = None
self.high_frequency_delta: torch.Tensor = None
def reset(self):
self.iteration = 0
self.low_frequency_delta = None
self.high_frequency_delta = None
class FasterCacheBlockState:
r"""
State for [FasterCache](https://huggingface.co/papers/2410.19355). Every underlying block that FasterCache is
applied to will have an instance of this state.
"""
def __init__(self) -> None:
self.iteration: int = 0
self.batch_size: int = None
self.cache: Tuple[torch.Tensor, torch.Tensor] = None
def reset(self):
self.iteration = 0
self.batch_size = None
self.cache = None
class FasterCacheDenoiserHook(ModelHook):
_is_stateful = True
def __init__(
self,
unconditional_batch_skip_range: int,
unconditional_batch_timestep_skip_range: Tuple[int, int],
tensor_format: str,
is_guidance_distilled: bool,
uncond_cond_input_kwargs_identifiers: List[str],
current_timestep_callback: Callable[[], int],
low_frequency_weight_callback: Callable[[torch.nn.Module], torch.Tensor],
high_frequency_weight_callback: Callable[[torch.nn.Module], torch.Tensor],
) -> None:
super().__init__()
self.unconditional_batch_skip_range = unconditional_batch_skip_range
self.unconditional_batch_timestep_skip_range = unconditional_batch_timestep_skip_range
# We can't easily detect what args are to be split in unconditional and conditional branches. We
# can only do it for kwargs, hence they are the only ones we split. The args are passed as-is.
# If a model is to be made compatible with FasterCache, the user must ensure that the inputs that
# contain batchwise-concatenated unconditional and conditional inputs are passed as kwargs.
self.uncond_cond_input_kwargs_identifiers = uncond_cond_input_kwargs_identifiers
self.tensor_format = tensor_format
self.is_guidance_distilled = is_guidance_distilled
self.current_timestep_callback = current_timestep_callback
self.low_frequency_weight_callback = low_frequency_weight_callback
self.high_frequency_weight_callback = high_frequency_weight_callback
def initialize_hook(self, module):
self.state = FasterCacheDenoiserState()
return module
@staticmethod
def _get_cond_input(input: torch.Tensor) -> Tuple[torch.Tensor, torch.Tensor]:
# Note: this method assumes that the input tensor is batchwise-concatenated with unconditional inputs
# followed by conditional inputs.
_, cond = input.chunk(2, dim=0)
return cond
def new_forward(self, module: torch.nn.Module, *args, **kwargs) -> Any:
# Split the unconditional and conditional inputs. We only want to infer the conditional branch if the
# requirements for skipping the unconditional branch are met as described in the paper.
# We skip the unconditional branch only if the following conditions are met:
# 1. We have completed at least one iteration of the denoiser
# 2. The current timestep is within the range specified by the user. This is the optimal timestep range
# where approximating the unconditional branch from the computation of the conditional branch is possible
# without a significant loss in quality.
# 3. The current iteration is not a multiple of the unconditional batch skip range. This is done so that
# we compute the unconditional branch at least once every few iterations to ensure minimal quality loss.
is_within_timestep_range = (
self.unconditional_batch_timestep_skip_range[0]
< self.current_timestep_callback()
< self.unconditional_batch_timestep_skip_range[1]
)
should_skip_uncond = (
self.state.iteration > 0
and is_within_timestep_range
and self.state.iteration % self.unconditional_batch_skip_range != 0
and not self.is_guidance_distilled
)
if should_skip_uncond:
is_any_kwarg_uncond = any(k in self.uncond_cond_input_kwargs_identifiers for k in kwargs.keys())
if is_any_kwarg_uncond:
logger.debug("FasterCache - Skipping unconditional branch computation")
args = tuple([self._get_cond_input(arg) if torch.is_tensor(arg) else arg for arg in args])
kwargs = {
k: v if k not in self.uncond_cond_input_kwargs_identifiers else self._get_cond_input(v)
for k, v in kwargs.items()
}
output = self.fn_ref.original_forward(*args, **kwargs)
if self.is_guidance_distilled:
self.state.iteration += 1
return output
if torch.is_tensor(output):
hidden_states = output
elif isinstance(output, (tuple, Transformer2DModelOutput)):
hidden_states = output[0]
batch_size = hidden_states.size(0)
if should_skip_uncond:
self.state.low_frequency_delta = self.state.low_frequency_delta * self.low_frequency_weight_callback(
module
)
self.state.high_frequency_delta = self.state.high_frequency_delta * self.high_frequency_weight_callback(
module
)
if self.tensor_format == "BCFHW":
hidden_states = hidden_states.permute(0, 2, 1, 3, 4)
if self.tensor_format == "BCFHW" or self.tensor_format == "BFCHW":
hidden_states = hidden_states.flatten(0, 1)
low_freq_cond, high_freq_cond = _split_low_high_freq(hidden_states.float())
# Approximate/compute the unconditional branch outputs as described in Equation 9 and 10 of the paper
low_freq_uncond = self.state.low_frequency_delta + low_freq_cond
high_freq_uncond = self.state.high_frequency_delta + high_freq_cond
uncond_freq = low_freq_uncond + high_freq_uncond
uncond_states = torch.fft.ifftshift(uncond_freq)
uncond_states = torch.fft.ifft2(uncond_states).real
if self.tensor_format == "BCFHW" or self.tensor_format == "BFCHW":
uncond_states = uncond_states.unflatten(0, (batch_size, -1))
hidden_states = hidden_states.unflatten(0, (batch_size, -1))
if self.tensor_format == "BCFHW":
uncond_states = uncond_states.permute(0, 2, 1, 3, 4)
hidden_states = hidden_states.permute(0, 2, 1, 3, 4)
# Concatenate the approximated unconditional and predicted conditional branches
uncond_states = uncond_states.to(hidden_states.dtype)
hidden_states = torch.cat([uncond_states, hidden_states], dim=0)
else:
uncond_states, cond_states = hidden_states.chunk(2, dim=0)
if self.tensor_format == "BCFHW":
uncond_states = uncond_states.permute(0, 2, 1, 3, 4)
cond_states = cond_states.permute(0, 2, 1, 3, 4)
if self.tensor_format == "BCFHW" or self.tensor_format == "BFCHW":
uncond_states = uncond_states.flatten(0, 1)
cond_states = cond_states.flatten(0, 1)
low_freq_uncond, high_freq_uncond = _split_low_high_freq(uncond_states.float())
low_freq_cond, high_freq_cond = _split_low_high_freq(cond_states.float())
self.state.low_frequency_delta = low_freq_uncond - low_freq_cond
self.state.high_frequency_delta = high_freq_uncond - high_freq_cond
self.state.iteration += 1
if torch.is_tensor(output):
output = hidden_states
elif isinstance(output, tuple):
output = (hidden_states, *output[1:])
else:
output.sample = hidden_states
return output
def reset_state(self, module: torch.nn.Module) -> torch.nn.Module:
self.state.reset()
return module
class FasterCacheBlockHook(ModelHook):
_is_stateful = True
def __init__(
self,
block_skip_range: int,
timestep_skip_range: Tuple[int, int],
is_guidance_distilled: bool,
weight_callback: Callable[[torch.nn.Module], float],
current_timestep_callback: Callable[[], int],
) -> None:
super().__init__()
self.block_skip_range = block_skip_range
self.timestep_skip_range = timestep_skip_range
self.is_guidance_distilled = is_guidance_distilled
self.weight_callback = weight_callback
self.current_timestep_callback = current_timestep_callback
def initialize_hook(self, module):
self.state = FasterCacheBlockState()
return module
def _compute_approximated_attention_output(
self, t_2_output: torch.Tensor, t_output: torch.Tensor, weight: float, batch_size: int
) -> torch.Tensor:
if t_2_output.size(0) != batch_size:
# The cache t_2_output contains both batchwise-concatenated unconditional-conditional branch outputs. Just
# take the conditional branch outputs.
assert t_2_output.size(0) == 2 * batch_size
t_2_output = t_2_output[batch_size:]
if t_output.size(0) != batch_size:
# The cache t_output contains both batchwise-concatenated unconditional-conditional branch outputs. Just
# take the conditional branch outputs.
assert t_output.size(0) == 2 * batch_size
t_output = t_output[batch_size:]
return t_output + (t_output - t_2_output) * weight
def new_forward(self, module: torch.nn.Module, *args, **kwargs) -> Any:
batch_size = [
*[arg.size(0) for arg in args if torch.is_tensor(arg)],
*[v.size(0) for v in kwargs.values() if torch.is_tensor(v)],
][0]
if self.state.batch_size is None:
# Will be updated on first forward pass through the denoiser
self.state.batch_size = batch_size
# If we have to skip due to the skip conditions, then let's skip as expected.
# But, we can't skip if the denoiser wants to infer both unconditional and conditional branches. This
# is because the expected output shapes of attention layer will not match if we only return values from
# the cache (which only caches conditional branch outputs). So, if state.batch_size (which is the true
# unconditional-conditional batch size) is same as the current batch size, we don't perform the layer
# skip. Otherwise, we conditionally skip the layer based on what state.skip_callback returns.
is_within_timestep_range = (
self.timestep_skip_range[0] < self.current_timestep_callback() < self.timestep_skip_range[1]
)
if not is_within_timestep_range:
should_skip_attention = False
else:
should_compute_attention = self.state.iteration > 0 and self.state.iteration % self.block_skip_range == 0
should_skip_attention = not should_compute_attention
if should_skip_attention:
should_skip_attention = self.is_guidance_distilled or self.state.batch_size != batch_size
if should_skip_attention:
logger.debug("FasterCache - Skipping attention and using approximation")
if torch.is_tensor(self.state.cache[-1]):
t_2_output, t_output = self.state.cache
weight = self.weight_callback(module)
output = self._compute_approximated_attention_output(t_2_output, t_output, weight, batch_size)
else:
# The cache contains multiple tensors from past N iterations (N=2 for FasterCache). We need to handle all of them.
# Diffusers blocks can return multiple tensors - let's call them [A, B, C, ...] for simplicity.
# In our cache, we would have [[A_1, B_1, C_1, ...], [A_2, B_2, C_2, ...], ...] where each list is the output from
# a forward pass of the block. We need to compute the approximated output for each of these tensors.
# The zip(*state.cache) operation will give us [(A_1, A_2, ...), (B_1, B_2, ...), (C_1, C_2, ...), ...] which
# allows us to compute the approximated attention output for each tensor in the cache.
output = ()
for t_2_output, t_output in zip(*self.state.cache):
result = self._compute_approximated_attention_output(
t_2_output, t_output, self.weight_callback(module), batch_size
)
output += (result,)
else:
logger.debug("FasterCache - Computing attention")
output = self.fn_ref.original_forward(*args, **kwargs)
# Note that the following condition for getting hidden_states should suffice since Diffusers blocks either return
# a single hidden_states tensor, or a tuple of (hidden_states, encoder_hidden_states) tensors. We need to handle
# both cases.
if torch.is_tensor(output):
cache_output = output
if not self.is_guidance_distilled and cache_output.size(0) == self.state.batch_size:
# The output here can be both unconditional-conditional branch outputs or just conditional branch outputs.
# This is determined at the higher-level denoiser module. We only want to cache the conditional branch outputs.
cache_output = cache_output.chunk(2, dim=0)[1]
else:
# Cache all return values and perform the same operation as above
cache_output = ()
for out in output:
if not self.is_guidance_distilled and out.size(0) == self.state.batch_size:
out = out.chunk(2, dim=0)[1]
cache_output += (out,)
if self.state.cache is None:
self.state.cache = [cache_output, cache_output]
else:
self.state.cache = [self.state.cache[-1], cache_output]
self.state.iteration += 1
return output
def reset_state(self, module: torch.nn.Module) -> torch.nn.Module:
self.state.reset()
return module
def apply_faster_cache(module: torch.nn.Module, config: FasterCacheConfig) -> None:
r"""
Applies [FasterCache](https://huggingface.co/papers/2410.19355) to a given pipeline.
Args:
pipeline (`DiffusionPipeline`):
The diffusion pipeline to apply FasterCache to.
config (`Optional[FasterCacheConfig]`, `optional`, defaults to `None`):
The configuration to use for FasterCache.
Example:
```python
>>> import torch
>>> from diffusers import CogVideoXPipeline, FasterCacheConfig, apply_faster_cache
>>> pipe = CogVideoXPipeline.from_pretrained("THUDM/CogVideoX-5b", torch_dtype=torch.bfloat16)
>>> pipe.to("cuda")
>>> config = FasterCacheConfig(
... spatial_attention_block_skip_range=2,
... spatial_attention_timestep_skip_range=(-1, 681),
... low_frequency_weight_update_timestep_range=(99, 641),
... high_frequency_weight_update_timestep_range=(-1, 301),
... spatial_attention_block_identifiers=["transformer_blocks"],
... attention_weight_callback=lambda _: 0.3,
... tensor_format="BFCHW",
... )
>>> apply_faster_cache(pipe.transformer, config)
```
"""
logger.warning(
"FasterCache is a purely experimental feature and may not work as expected. Not all models support FasterCache. "
"The API is subject to change in future releases, with no guarantee of backward compatibility. Please report any issues at "
"https://github.com/huggingface/diffusers/issues."
)
if config.attention_weight_callback is None:
# If the user has not provided a weight callback, we default to 0.5 for all timesteps.
# In the paper, they recommend using a gradually increasing weight from 0 to 1 as the inference progresses, but
# this depends from model-to-model. It is required by the user to provide a weight callback if they want to
# use a different weight function. Defaulting to 0.5 works well in practice for most cases.
logger.warning(
"No `attention_weight_callback` provided when enabling FasterCache. Defaulting to using a weight of 0.5 for all timesteps."
)
config.attention_weight_callback = lambda _: 0.5
if config.low_frequency_weight_callback is None:
logger.debug(
"Low frequency weight callback not provided when enabling FasterCache. Defaulting to behaviour described in the paper."
)
def low_frequency_weight_callback(module: torch.nn.Module) -> float:
is_within_range = (
config.low_frequency_weight_update_timestep_range[0]
< config.current_timestep_callback()
< config.low_frequency_weight_update_timestep_range[1]
)
return config.alpha_low_frequency if is_within_range else 1.0
config.low_frequency_weight_callback = low_frequency_weight_callback
if config.high_frequency_weight_callback is None:
logger.debug(
"High frequency weight callback not provided when enabling FasterCache. Defaulting to behaviour described in the paper."
)
def high_frequency_weight_callback(module: torch.nn.Module) -> float:
is_within_range = (
config.high_frequency_weight_update_timestep_range[0]
< config.current_timestep_callback()
< config.high_frequency_weight_update_timestep_range[1]
)
return config.alpha_high_frequency if is_within_range else 1.0
config.high_frequency_weight_callback = high_frequency_weight_callback
supported_tensor_formats = ["BCFHW", "BFCHW", "BCHW"] # TODO(aryan): Support BSC for LTX Video
if config.tensor_format not in supported_tensor_formats:
raise ValueError(f"`tensor_format` must be one of {supported_tensor_formats}, but got {config.tensor_format}.")
_apply_faster_cache_on_denoiser(module, config)
for name, submodule in module.named_modules():
if not isinstance(submodule, _ATTENTION_CLASSES):
continue
if any(re.search(identifier, name) is not None for identifier in _TRANSFORMER_BLOCK_IDENTIFIERS):
_apply_faster_cache_on_attention_class(name, submodule, config)
def _apply_faster_cache_on_denoiser(module: torch.nn.Module, config: FasterCacheConfig) -> None:
hook = FasterCacheDenoiserHook(
config.unconditional_batch_skip_range,
config.unconditional_batch_timestep_skip_range,
config.tensor_format,
config.is_guidance_distilled,
config._unconditional_conditional_input_kwargs_identifiers,
config.current_timestep_callback,
config.low_frequency_weight_callback,
config.high_frequency_weight_callback,
)
registry = HookRegistry.check_if_exists_or_initialize(module)
registry.register_hook(hook, _FASTER_CACHE_DENOISER_HOOK)
def _apply_faster_cache_on_attention_class(name: str, module: Attention, config: FasterCacheConfig) -> None:
is_spatial_self_attention = (
any(re.search(identifier, name) is not None for identifier in config.spatial_attention_block_identifiers)
and config.spatial_attention_block_skip_range is not None
and not getattr(module, "is_cross_attention", False)
)
is_temporal_self_attention = (
any(re.search(identifier, name) is not None for identifier in config.temporal_attention_block_identifiers)
and config.temporal_attention_block_skip_range is not None
and not module.is_cross_attention
)
block_skip_range, timestep_skip_range, block_type = None, None, None
if is_spatial_self_attention:
block_skip_range = config.spatial_attention_block_skip_range
timestep_skip_range = config.spatial_attention_timestep_skip_range
block_type = "spatial"
elif is_temporal_self_attention:
block_skip_range = config.temporal_attention_block_skip_range
timestep_skip_range = config.temporal_attention_timestep_skip_range
block_type = "temporal"
if block_skip_range is None or timestep_skip_range is None:
logger.debug(
f'Unable to apply FasterCache to the selected layer: "{name}" because it does '
f"not match any of the required criteria for spatial or temporal attention layers. Note, "
f"however, that this layer may still be valid for applying PAB. Please specify the correct "
f"block identifiers in the configuration or use the specialized `apply_faster_cache_on_module` "
f"function to apply FasterCache to this layer."
)
return
logger.debug(f"Enabling FasterCache ({block_type}) for layer: {name}")
hook = FasterCacheBlockHook(
block_skip_range,
timestep_skip_range,
config.is_guidance_distilled,
config.attention_weight_callback,
config.current_timestep_callback,
)
registry = HookRegistry.check_if_exists_or_initialize(module)
registry.register_hook(hook, _FASTER_CACHE_BLOCK_HOOK)
# Reference: https://github.com/Vchitect/FasterCache/blob/fab32c15014636dc854948319c0a9a8d92c7acb4/scripts/latte/faster_cache_sample_latte.py#L127C1-L143C39
@torch.no_grad()
def _split_low_high_freq(x):
fft = torch.fft.fft2(x)
fft_shifted = torch.fft.fftshift(fft)
height, width = x.shape[-2:]
radius = min(height, width) // 5
y_grid, x_grid = torch.meshgrid(torch.arange(height), torch.arange(width))
center_x, center_y = width // 2, height // 2
mask = (x_grid - center_x) ** 2 + (y_grid - center_y) ** 2 <= radius**2
low_freq_mask = mask.unsqueeze(0).unsqueeze(0).to(x.device)
high_freq_mask = ~low_freq_mask
low_freq_fft = fft_shifted * low_freq_mask
high_freq_fft = fft_shifted * high_freq_mask
return low_freq_fft, high_freq_fft

11
src/diffusers/hooks/pyramid_attention_broadcast.py
View File

@@ -26,8 +26,8 @@ from .hooks import HookRegistry, ModelHook
logger = logging.get_logger(__name__) # pylint: disable=invalid-name
_PYRAMID_ATTENTION_BROADCAST_HOOK = "pyramid_attention_broadcast"
_ATTENTION_CLASSES = (Attention, MochiAttention)
_SPATIAL_ATTENTION_BLOCK_IDENTIFIERS = ("blocks", "transformer_blocks", "single_transformer_blocks")
_TEMPORAL_ATTENTION_BLOCK_IDENTIFIERS = ("temporal_transformer_blocks",)
_CROSS_ATTENTION_BLOCK_IDENTIFIERS = ("blocks", "transformer_blocks")
@@ -87,7 +87,7 @@ class PyramidAttentionBroadcastConfig:
def __repr__(self) -> str:
return (
f"PyramidAttentionBroadcastConfig("
f"PyramidAttentionBroadcastConfig(\n"
f" spatial_attention_block_skip_range={self.spatial_attention_block_skip_range},\n"
f" temporal_attention_block_skip_range={self.temporal_attention_block_skip_range},\n"
f" cross_attention_block_skip_range={self.cross_attention_block_skip_range},\n"
@@ -175,10 +175,7 @@ class PyramidAttentionBroadcastHook(ModelHook):
return module
def apply_pyramid_attention_broadcast(
module: torch.nn.Module,
config: PyramidAttentionBroadcastConfig,
):
def apply_pyramid_attention_broadcast(module: torch.nn.Module, config: PyramidAttentionBroadcastConfig):
r"""
Apply [Pyramid Attention Broadcast](https://huggingface.co/papers/2408.12588) to a given pipeline.
@@ -311,4 +308,4 @@ def _apply_pyramid_attention_broadcast_hook(
"""
registry = HookRegistry.check_if_exists_or_initialize(module)
hook = PyramidAttentionBroadcastHook(timestep_skip_range, block_skip_range, current_timestep_callback)
registry.register_hook(hook, "pyramid_attention_broadcast")
registry.register_hook(hook, _PYRAMID_ATTENTION_BROADCAST_HOOK)

25
src/diffusers/models/cache_utils.py
View File

@@ -24,6 +24,7 @@ class CacheMixin:
Supported caching techniques:
- [Pyramid Attention Broadcast](https://huggingface.co/papers/2408.12588)
- [FasterCache](https://huggingface.co/papers/2410.19355)
"""
_cache_config = None
@@ -59,17 +60,31 @@ class CacheMixin:
```
"""
from ..hooks import PyramidAttentionBroadcastConfig, apply_pyramid_attention_broadcast
from ..hooks import (
FasterCacheConfig,
PyramidAttentionBroadcastConfig,
apply_faster_cache,
apply_pyramid_attention_broadcast,
)
if self.is_cache_enabled:
raise ValueError(
f"Caching has already been enabled with {type(self._cache_config)}. To apply a new caching technique, please disable the existing one first."
)
if isinstance(config, PyramidAttentionBroadcastConfig):
apply_pyramid_attention_broadcast(self, config)
elif isinstance(config, FasterCacheConfig):
apply_faster_cache(self, config)
else:
raise ValueError(f"Cache config {type(config)} is not supported.")
self._cache_config = config
def disable_cache(self) -> None:
from ..hooks import HookRegistry, PyramidAttentionBroadcastConfig
from ..hooks import FasterCacheConfig, HookRegistry, PyramidAttentionBroadcastConfig
from ..hooks.faster_cache import _FASTER_CACHE_BLOCK_HOOK, _FASTER_CACHE_DENOISER_HOOK
from ..hooks.pyramid_attention_broadcast import _PYRAMID_ATTENTION_BROADCAST_HOOK
if self._cache_config is None:
logger.warning("Caching techniques have not been enabled, so there's nothing to disable.")
@@ -77,7 +92,11 @@ class CacheMixin:
if isinstance(self._cache_config, PyramidAttentionBroadcastConfig):
registry = HookRegistry.check_if_exists_or_initialize(self)
registry.remove_hook("pyramid_attention_broadcast", recurse=True)
registry.remove_hook(_PYRAMID_ATTENTION_BROADCAST_HOOK, recurse=True)
elif isinstance(self._cache_config, FasterCacheConfig):
registry = HookRegistry.check_if_exists_or_initialize(self)
registry.remove_hook(_FASTER_CACHE_DENOISER_HOOK, recurse=True)
registry.remove_hook(_FASTER_CACHE_BLOCK_HOOK, recurse=True)
else:
raise ValueError(f"Cache config {type(self._cache_config)} is not supported.")

2
src/diffusers/models/embeddings.py
View File

@@ -336,7 +336,7 @@ def get_1d_sincos_pos_embed_from_grid(embed_dim, pos, output_type="np"):
" `from_numpy` is no longer required."
" Pass `output_type='pt' to use the new version now."
)
deprecate("output_type=='np'", "0.33.0", deprecation_message, standard_warn=False)
deprecate("output_type=='np'", "0.34.0", deprecation_message, standard_warn=False)
return get_1d_sincos_pos_embed_from_grid_np(embed_dim=embed_dim, pos=pos)
if embed_dim % 2 != 0:
raise ValueError("embed_dim must be divisible by 2")

4
src/diffusers/models/modeling_utils.py
View File

@@ -37,7 +37,6 @@ from torch import Tensor, nn
from typing_extensions import Self
from .. import __version__
from ..hooks import apply_group_offloading, apply_layerwise_casting
from ..quantizers import DiffusersAutoQuantizer, DiffusersQuantizer
from ..quantizers.quantization_config import QuantizationMethod
from ..utils import (
@@ -504,6 +503,7 @@ class ModelMixin(torch.nn.Module, PushToHubMixin):
non_blocking (`bool`, *optional*, defaults to `False`):
If `True`, the weight casting operations are non-blocking.
"""
from ..hooks import apply_layerwise_casting
user_provided_patterns = True
if skip_modules_pattern is None:
@@ -570,6 +570,8 @@ class ModelMixin(torch.nn.Module, PushToHubMixin):
... )
```
"""
from ..hooks import apply_group_offloading
if getattr(self, "enable_tiling", None) is not None and getattr(self, "use_tiling", False) and use_stream:
msg = (
"Applying group offloading on autoencoders, with CUDA streams, may not work as expected if the first "

2
src/diffusers/pipelines/latte/pipeline_latte.py
View File

@@ -817,7 +817,7 @@ class LattePipeline(DiffusionPipeline):
# predict noise model_output
noise_pred = self.transformer(
latent_model_input,
hidden_states=latent_model_input,
encoder_hidden_states=prompt_embeds,
timestep=current_timestep,
enable_temporal_attentions=enable_temporal_attentions,

19
src/diffusers/utils/dummy_pt_objects.py
View File

@@ -2,6 +2,21 @@
from ..utils import DummyObject, requires_backends
class FasterCacheConfig(metaclass=DummyObject):
_backends = ["torch"]
def __init__(self, *args, **kwargs):
requires_backends(self, ["torch"])
@classmethod
def from_config(cls, *args, **kwargs):
requires_backends(cls, ["torch"])
@classmethod
def from_pretrained(cls, *args, **kwargs):
requires_backends(cls, ["torch"])
class HookRegistry(metaclass=DummyObject):
_backends = ["torch"]
@@ -32,6 +47,10 @@ class PyramidAttentionBroadcastConfig(metaclass=DummyObject):
requires_backends(cls, ["torch"])
def apply_faster_cache(*args, **kwargs):
requires_backends(apply_faster_cache, ["torch"])
def apply_pyramid_attention_broadcast(*args, **kwargs):
requires_backends(apply_pyramid_attention_broadcast, ["torch"])

5
tests/pipelines/cogvideo/test_cogvideox.py
View File

@@ -31,6 +31,7 @@ from diffusers.utils.testing_utils import (
from ..pipeline_params import TEXT_TO_IMAGE_BATCH_PARAMS, TEXT_TO_IMAGE_IMAGE_PARAMS, TEXT_TO_IMAGE_PARAMS
from ..test_pipelines_common import (
FasterCacheTesterMixin,
PipelineTesterMixin,
PyramidAttentionBroadcastTesterMixin,
check_qkv_fusion_matches_attn_procs_length,
@@ -42,7 +43,9 @@ from ..test_pipelines_common import (
enable_full_determinism()
class CogVideoXPipelineFastTests(PipelineTesterMixin, PyramidAttentionBroadcastTesterMixin, unittest.TestCase):
class CogVideoXPipelineFastTests(
PipelineTesterMixin, PyramidAttentionBroadcastTesterMixin, FasterCacheTesterMixin, unittest.TestCase
):
pipeline_class = CogVideoXPipeline
params = TEXT_TO_IMAGE_PARAMS - {"cross_attention_kwargs"}
batch_params = TEXT_TO_IMAGE_BATCH_PARAMS

23
tests/pipelines/flux/test_pipeline_flux.py
View File

@@ -7,7 +7,13 @@ import torch
from huggingface_hub import hf_hub_download
from transformers import AutoTokenizer, CLIPTextConfig, CLIPTextModel, CLIPTokenizer, T5EncoderModel
from diffusers import AutoencoderKL, FlowMatchEulerDiscreteScheduler, FluxPipeline, FluxTransformer2DModel
from diffusers import (
AutoencoderKL,
FasterCacheConfig,
FlowMatchEulerDiscreteScheduler,
FluxPipeline,
FluxTransformer2DModel,
)
from diffusers.utils.testing_utils import (
backend_empty_cache,
nightly,
@@ -18,6 +24,7 @@ from diffusers.utils.testing_utils import (
)
from ..test_pipelines_common import (
FasterCacheTesterMixin,
FluxIPAdapterTesterMixin,
PipelineTesterMixin,
PyramidAttentionBroadcastTesterMixin,
@@ -27,7 +34,11 @@ from ..test_pipelines_common import (
class FluxPipelineFastTests(
unittest.TestCase, PipelineTesterMixin, FluxIPAdapterTesterMixin, PyramidAttentionBroadcastTesterMixin
unittest.TestCase,
PipelineTesterMixin,
FluxIPAdapterTesterMixin,
PyramidAttentionBroadcastTesterMixin,
FasterCacheTesterMixin,
):
pipeline_class = FluxPipeline
params = frozenset(["prompt", "height", "width", "guidance_scale", "prompt_embeds", "pooled_prompt_embeds"])
@@ -38,6 +49,14 @@ class FluxPipelineFastTests(
test_layerwise_casting = True
test_group_offloading = True
faster_cache_config = FasterCacheConfig(
spatial_attention_block_skip_range=2,
spatial_attention_timestep_skip_range=(-1, 901),
unconditional_batch_skip_range=2,
attention_weight_callback=lambda _: 0.5,
is_guidance_distilled=True,
)
def get_dummy_components(self, num_layers: int = 1, num_single_layers: int = 1):
torch.manual_seed(0)
transformer = FluxTransformer2DModel(

20
tests/pipelines/hunyuan_video/test_hunyuan_video.py
View File

@@ -21,6 +21,7 @@ from transformers import CLIPTextConfig, CLIPTextModel, CLIPTokenizer, LlamaConf
from diffusers import (
AutoencoderKLHunyuanVideo,
FasterCacheConfig,
FlowMatchEulerDiscreteScheduler,
HunyuanVideoPipeline,
HunyuanVideoTransformer3DModel,
@@ -30,13 +31,20 @@ from diffusers.utils.testing_utils import (
torch_device,
)
from ..test_pipelines_common import PipelineTesterMixin, PyramidAttentionBroadcastTesterMixin, to_np
from ..test_pipelines_common import (
FasterCacheTesterMixin,
PipelineTesterMixin,
PyramidAttentionBroadcastTesterMixin,
to_np,
)
enable_full_determinism()
class HunyuanVideoPipelineFastTests(PipelineTesterMixin, PyramidAttentionBroadcastTesterMixin, unittest.TestCase):
class HunyuanVideoPipelineFastTests(
PipelineTesterMixin, PyramidAttentionBroadcastTesterMixin, FasterCacheTesterMixin, unittest.TestCase
):
pipeline_class = HunyuanVideoPipeline
params = frozenset(["prompt", "height", "width", "guidance_scale", "prompt_embeds", "pooled_prompt_embeds"])
batch_params = frozenset(["prompt"])
@@ -56,6 +64,14 @@ class HunyuanVideoPipelineFastTests(PipelineTesterMixin, PyramidAttentionBroadca
test_layerwise_casting = True
test_group_offloading = True
faster_cache_config = FasterCacheConfig(
spatial_attention_block_skip_range=2,
spatial_attention_timestep_skip_range=(-1, 901),
unconditional_batch_skip_range=2,
attention_weight_callback=lambda _: 0.5,
is_guidance_distilled=True,
)
def get_dummy_components(self, num_layers: int = 1, num_single_layers: int = 1):
torch.manual_seed(0)
transformer = HunyuanVideoTransformer3DModel(

21
tests/pipelines/latte/test_latte.py
View File

@@ -25,6 +25,7 @@ from transformers import AutoTokenizer, T5EncoderModel
from diffusers import (
AutoencoderKL,
DDIMScheduler,
FasterCacheConfig,
LattePipeline,
LatteTransformer3DModel,
PyramidAttentionBroadcastConfig,
@@ -40,13 +41,20 @@ from diffusers.utils.testing_utils import (
)
from ..pipeline_params import TEXT_TO_IMAGE_BATCH_PARAMS, TEXT_TO_IMAGE_IMAGE_PARAMS, TEXT_TO_IMAGE_PARAMS
from ..test_pipelines_common import PipelineTesterMixin, PyramidAttentionBroadcastTesterMixin, to_np
from ..test_pipelines_common import (
FasterCacheTesterMixin,
PipelineTesterMixin,
PyramidAttentionBroadcastTesterMixin,
to_np,
)
enable_full_determinism()
class LattePipelineFastTests(PipelineTesterMixin, PyramidAttentionBroadcastTesterMixin, unittest.TestCase):
class LattePipelineFastTests(
PipelineTesterMixin, PyramidAttentionBroadcastTesterMixin, FasterCacheTesterMixin, unittest.TestCase
):
pipeline_class = LattePipeline
params = TEXT_TO_IMAGE_PARAMS - {"cross_attention_kwargs"}
batch_params = TEXT_TO_IMAGE_BATCH_PARAMS
@@ -69,6 +77,15 @@ class LattePipelineFastTests(PipelineTesterMixin, PyramidAttentionBroadcastTeste
cross_attention_block_identifiers=["transformer_blocks"],
)
faster_cache_config = FasterCacheConfig(
spatial_attention_block_skip_range=2,
temporal_attention_block_skip_range=2,
spatial_attention_timestep_skip_range=(-1, 901),
temporal_attention_timestep_skip_range=(-1, 901),
unconditional_batch_skip_range=2,
attention_weight_callback=lambda _: 0.5,
)
def get_dummy_components(self, num_layers: int = 1):
torch.manual_seed(0)
transformer = LatteTransformer3DModel(

8
tests/pipelines/mochi/test_mochi.py
View File

@@ -33,13 +33,13 @@ from diffusers.utils.testing_utils import (
)
from ..pipeline_params import TEXT_TO_IMAGE_BATCH_PARAMS, TEXT_TO_IMAGE_IMAGE_PARAMS, TEXT_TO_IMAGE_PARAMS
from ..test_pipelines_common import PipelineTesterMixin, to_np
from ..test_pipelines_common import FasterCacheTesterMixin, PipelineTesterMixin, to_np
enable_full_determinism()
class MochiPipelineFastTests(PipelineTesterMixin, unittest.TestCase):
class MochiPipelineFastTests(PipelineTesterMixin, FasterCacheTesterMixin, unittest.TestCase):
pipeline_class = MochiPipeline
params = TEXT_TO_IMAGE_PARAMS - {"cross_attention_kwargs"}
batch_params = TEXT_TO_IMAGE_BATCH_PARAMS
@@ -59,13 +59,13 @@ class MochiPipelineFastTests(PipelineTesterMixin, unittest.TestCase):
test_layerwise_casting = True
test_group_offloading = True
def get_dummy_components(self):
def get_dummy_components(self, num_layers: int = 2):
torch.manual_seed(0)
transformer = MochiTransformer3DModel(
patch_size=2,
num_attention_heads=2,
attention_head_dim=8,
num_layers=2,
num_layers=num_layers,
pooled_projection_dim=16,
in_channels=12,
out_channels=None,

164
tests/pipelines/test_pipelines_common.py
View File

@@ -23,13 +23,16 @@ from diffusers import (
ConsistencyDecoderVAE,
DDIMScheduler,
DiffusionPipeline,
FasterCacheConfig,
KolorsPipeline,
PyramidAttentionBroadcastConfig,
StableDiffusionPipeline,
StableDiffusionXLPipeline,
UNet2DConditionModel,
apply_faster_cache,
)
from diffusers.hooks import apply_group_offloading
from diffusers.hooks.faster_cache import FasterCacheBlockHook, FasterCacheDenoiserHook
from diffusers.hooks.pyramid_attention_broadcast import PyramidAttentionBroadcastHook
from diffusers.image_processor import VaeImageProcessor
from diffusers.loaders import FluxIPAdapterMixin, IPAdapterMixin
@@ -2551,6 +2554,167 @@ class PyramidAttentionBroadcastTesterMixin:
), "Outputs from normal inference and after disabling cache should not differ."
class FasterCacheTesterMixin:
faster_cache_config = FasterCacheConfig(
spatial_attention_block_skip_range=2,
spatial_attention_timestep_skip_range=(-1, 901),
unconditional_batch_skip_range=2,
attention_weight_callback=lambda _: 0.5,
)
def test_faster_cache_basic_warning_or_errors_raised(self):
components = self.get_dummy_components()
logger = logging.get_logger("diffusers.hooks.faster_cache")
logger.setLevel(logging.INFO)
# Check if warning is raise when no attention_weight_callback is provided
pipe = self.pipeline_class(**components)
with CaptureLogger(logger) as cap_logger:
config = FasterCacheConfig(spatial_attention_block_skip_range=2, attention_weight_callback=None)
apply_faster_cache(pipe.transformer, config)
self.assertTrue("No `attention_weight_callback` provided when enabling FasterCache" in cap_logger.out)
# Check if error raised when unsupported tensor format used
pipe = self.pipeline_class(**components)
with self.assertRaises(ValueError):
config = FasterCacheConfig(spatial_attention_block_skip_range=2, tensor_format="BFHWC")
apply_faster_cache(pipe.transformer, config)
def test_faster_cache_inference(self, expected_atol: float = 0.1):
device = "cpu" # ensure determinism for the device-dependent torch.Generator
def create_pipe():
torch.manual_seed(0)
num_layers = 2
components = self.get_dummy_components(num_layers=num_layers)
pipe = self.pipeline_class(**components)
pipe = pipe.to(device)
pipe.set_progress_bar_config(disable=None)
return pipe
def run_forward(pipe):
torch.manual_seed(0)
inputs = self.get_dummy_inputs(device)
inputs["num_inference_steps"] = 4
return pipe(**inputs)[0]
# Run inference without FasterCache
pipe = create_pipe()
output = run_forward(pipe).flatten()
original_image_slice = np.concatenate((output[:8], output[-8:]))
# Run inference with FasterCache enabled
self.faster_cache_config.current_timestep_callback = lambda: pipe.current_timestep
pipe = create_pipe()
pipe.transformer.enable_cache(self.faster_cache_config)
output = run_forward(pipe).flatten().flatten()
image_slice_faster_cache_enabled = np.concatenate((output[:8], output[-8:]))
# Run inference with FasterCache disabled
pipe.transformer.disable_cache()
output = run_forward(pipe).flatten()
image_slice_faster_cache_disabled = np.concatenate((output[:8], output[-8:]))
assert np.allclose(
original_image_slice, image_slice_faster_cache_enabled, atol=expected_atol
), "FasterCache outputs should not differ much in specified timestep range."
assert np.allclose(
original_image_slice, image_slice_faster_cache_disabled, atol=1e-4
), "Outputs from normal inference and after disabling cache should not differ."
def test_faster_cache_state(self):
from diffusers.hooks.faster_cache import _FASTER_CACHE_BLOCK_HOOK, _FASTER_CACHE_DENOISER_HOOK
device = "cpu" # ensure determinism for the device-dependent torch.Generator
num_layers = 0
num_single_layers = 0
dummy_component_kwargs = {}
dummy_component_parameters = inspect.signature(self.get_dummy_components).parameters
if "num_layers" in dummy_component_parameters:
num_layers = 2
dummy_component_kwargs["num_layers"] = num_layers
if "num_single_layers" in dummy_component_parameters:
num_single_layers = 2
dummy_component_kwargs["num_single_layers"] = num_single_layers
components = self.get_dummy_components(**dummy_component_kwargs)
pipe = self.pipeline_class(**components)
pipe.set_progress_bar_config(disable=None)
self.faster_cache_config.current_timestep_callback = lambda: pipe.current_timestep
pipe.transformer.enable_cache(self.faster_cache_config)
expected_hooks = 0
if self.faster_cache_config.spatial_attention_block_skip_range is not None:
expected_hooks += num_layers + num_single_layers
if self.faster_cache_config.temporal_attention_block_skip_range is not None:
expected_hooks += num_layers + num_single_layers
# Check if faster_cache denoiser hook is attached
denoiser = pipe.transformer if hasattr(pipe, "transformer") else pipe.unet
self.assertTrue(
hasattr(denoiser, "_diffusers_hook")
and isinstance(denoiser._diffusers_hook.get_hook(_FASTER_CACHE_DENOISER_HOOK), FasterCacheDenoiserHook),
"Hook should be of type FasterCacheDenoiserHook.",
)
# Check if all blocks have faster_cache block hook attached
count = 0
for name, module in denoiser.named_modules():
if hasattr(module, "_diffusers_hook"):
if name == "":
# Skip the root denoiser module
continue
count += 1
self.assertTrue(
isinstance(module._diffusers_hook.get_hook(_FASTER_CACHE_BLOCK_HOOK), FasterCacheBlockHook),
"Hook should be of type FasterCacheBlockHook.",
)
self.assertEqual(count, expected_hooks, "Number of hooks should match expected number.")
# Perform inference to ensure that states are updated correctly
def faster_cache_state_check_callback(pipe, i, t, kwargs):
for name, module in denoiser.named_modules():
if not hasattr(module, "_diffusers_hook"):
continue
if name == "":
# Root denoiser module
state = module._diffusers_hook.get_hook(_FASTER_CACHE_DENOISER_HOOK).state
if not self.faster_cache_config.is_guidance_distilled:
self.assertTrue(state.low_frequency_delta is not None, "Low frequency delta should be set.")
self.assertTrue(state.high_frequency_delta is not None, "High frequency delta should be set.")
else:
# Internal blocks
state = module._diffusers_hook.get_hook(_FASTER_CACHE_BLOCK_HOOK).state
self.assertTrue(state.cache is not None and len(state.cache) == 2, "Cache should be set.")
self.assertTrue(state.iteration == i + 1, "Hook iteration state should have updated during inference.")
return {}
inputs = self.get_dummy_inputs(device)
inputs["num_inference_steps"] = 4
inputs["callback_on_step_end"] = faster_cache_state_check_callback
_ = pipe(**inputs)[0]
# After inference, reset_stateful_hooks is called within the pipeline, which should have reset the states
for name, module in denoiser.named_modules():
if not hasattr(module, "_diffusers_hook"):
continue
if name == "":
# Root denoiser module
state = module._diffusers_hook.get_hook(_FASTER_CACHE_DENOISER_HOOK).state
self.assertTrue(state.iteration == 0, "Iteration should be reset to 0.")
self.assertTrue(state.low_frequency_delta is None, "Low frequency delta should be reset to None.")
self.assertTrue(state.high_frequency_delta is None, "High frequency delta should be reset to None.")
else:
# Internal blocks
state = module._diffusers_hook.get_hook(_FASTER_CACHE_BLOCK_HOOK).state
self.assertTrue(state.iteration == 0, "Iteration should be reset to 0.")
self.assertTrue(state.batch_size is None, "Batch size should be reset to None.")
self.assertTrue(state.cache is None, "Cache should be reset to None.")
# Some models (e.g. unCLIP) are extremely likely to significantly deviate depending on which hardware is used.
# This helper function is used to check that the image doesn't deviate on average more than 10 pixels from a
# reference image.