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# Copyright 2023-present the HuggingFace Inc. team.
#
# 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.
from dataclasses import dataclass, field
from typing import List, Optional, Union
from peft.tuners.lycoris_utils import LycorisConfig
from peft.utils import PeftType
@dataclass
class LoHaConfig(LycorisConfig):
"""
This is the configuration class to store the configuration of a [`LoHaModel`].
Args:
r (`int`):
LoHa rank.
alpha (`int`):
The alpha parameter for LoHa scaling.
rank_dropout (`float`):
The dropout probability for rank dimension during training.
module_dropout (`float`):
The dropout probability for disabling LoHa modules during training.
use_effective_conv2d (`bool`):
Use parameter effective decomposition for Conv2d with ksize > 1 ("Proposition 3" from FedPara paper).
target_modules (`Optional[Union[List[str], str]]`):
The names of the modules to apply the adapter to. If this is specified, only the modules with the specified
names will be replaced. When passing a string, a regex match will be performed. When passing a list of
strings, either an exact match will be performed or it is checked if the name of the module ends with any
of the passed strings. If this is specified as 'all-linear', then all linear/Conv1D modules are chosen,
excluding the output layer. If this is not specified, modules will be chosen according to the model
architecture. If the architecture is not known, an error will be raised -- in this case, you should specify
the target modules manually.
init_weights (`bool`):
Whether to perform initialization of adapter weights. This defaults to `True`, passing `False` is
discouraged.
layers_to_transform (`Union[List[int], int]`):
The layer indices to transform. If a list of ints is passed, it will apply the adapter to the layer indices
that are specified in this list. If a single integer is passed, it will apply the transformations on the
layer at this index.
layers_pattern (`str`):
The layer pattern name, used only if `layers_to_transform` is different from `None`.
rank_pattern (`dict`):
The mapping from layer names or regexp expression to ranks which are different from the default rank
specified by `r`.
alpha_pattern (`dict`):
The mapping from layer names or regexp expression to alphas which are different from the default alpha
specified by `alpha`.
modules_to_save (`Optional[List[str]]`):
List of modules apart from adapter layers to be set as trainable and saved in the final checkpoint.
"""
r: int = field(default=8, metadata={"help": "LoHa rank"})
alpha: int = field(default=8, metadata={"help": "LoHa alpha"})
rank_dropout: float = field(
default=0.0, metadata={"help": "The dropout probability for rank dimension during training"}
)
module_dropout: float = field(
default=0.0, metadata={"help": "The dropout probability for disabling LoHa modules during training"}
)
use_effective_conv2d: bool = field(
default=False,
metadata={
"help": 'Use parameter effective decomposition for Conv2d 3x3 with ksize > 1 ("Proposition 3" from FedPara paper)'
},
)
target_modules: Optional[Union[List[str], str]] = field(
default=None,
metadata={
"help": "List of module names or regex expression of the module names to replace with LoHa."
"For example, ['q', 'v'] or '.*decoder.*(SelfAttention|EncDecAttention).*(q|v)$' "
"This can also be a wildcard 'all-linear' which matches all linear/Conv1D layers except the output layer."
},
)
init_weights: bool = field(
default=True,
metadata={
"help": (
"Whether to initialize the weights of the LoHa layers with their default initialization. Don't change "
"this setting, except if you know exactly what you're doing."
),
},
)
layers_to_transform: Optional[Union[List[int], int]] = field(
default=None,
metadata={
"help": "The layer indexes to transform, is this argument is specified, PEFT will transform only the layers indexes that are specified inside this list. If a single integer is passed, PEFT will transform only the layer at this index."
},
)
layers_pattern: Optional[str] = field(
default=None,
metadata={
"help": "The layer pattern name, used only if `layers_to_transform` is different to None and if the layer pattern is not in the common layers pattern."
},
)
modules_to_save: Optional[List[str]] = field(
default=None,
metadata={
"help": "List of modules apart from LoHA layers to be set as trainable and saved in the final checkpoint. "
"For example, in Sequence Classification or Token Classification tasks, "
"the final layer `classifier/score` are randomly initialized and as such need to be trainable and saved."
},
)
def __post_init__(self):
self.peft_type = PeftType.LOHA
self.target_modules = (
set(self.target_modules) if isinstance(self.target_modules, list) else self.target_modules
)