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| # Copyright 2024 the LlamaFactory 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 typing import TYPE_CHECKING, List | |
| from ...extras.logging import get_logger | |
| if TYPE_CHECKING: | |
| from transformers import PretrainedConfig, PreTrainedModel, PreTrainedTokenizer | |
| logger = get_logger(__name__) | |
| def find_all_linear_modules(model: "PreTrainedModel", freeze_vision_tower: bool) -> List[str]: | |
| r""" | |
| Finds all available modules to apply lora or galore. | |
| """ | |
| forbidden_modules = {"lm_head"} | |
| if model.config.model_type == "chatglm": | |
| forbidden_modules.add("output_layer") | |
| elif model.config.model_type == "internlm2": | |
| forbidden_modules.add("output") | |
| elif model.config.model_type in ["llava", "paligemma"]: | |
| forbidden_modules.add("multi_modal_projector") | |
| if freeze_vision_tower: | |
| forbidden_modules.add("vision_tower") | |
| module_names = set() | |
| for name, module in model.named_modules(): | |
| if any(forbidden_module in name for forbidden_module in forbidden_modules): | |
| continue | |
| if "Linear" in module.__class__.__name__ and "Embedding" not in module.__class__.__name__: | |
| module_names.add(name.split(".")[-1]) | |
| logger.info("Found linear modules: {}".format(",".join(module_names))) | |
| return list(module_names) | |
| def find_expanded_modules(model: "PreTrainedModel", target_modules: List[str], num_layer_trainable: int) -> List[str]: | |
| r""" | |
| Finds the modules in the expanded blocks to apply lora. | |
| """ | |
| num_layers = getattr(model.config, "num_hidden_layers", None) | |
| if not num_layers: | |
| raise ValueError("Model was not supported.") | |
| if num_layers % num_layer_trainable != 0: | |
| raise ValueError( | |
| "`num_layers` {} should be divisible by `num_layer_trainable` {}.".format(num_layers, num_layer_trainable) | |
| ) | |
| stride = num_layers // num_layer_trainable | |
| trainable_layer_ids = range(stride - 1, num_layers + stride - 1, stride) | |
| trainable_layers = [".{:d}.".format(idx) for idx in trainable_layer_ids] | |
| module_names = [] | |
| for name, _ in model.named_modules(): | |
| if any(target_module in name for target_module in target_modules) and any( | |
| trainable_layer in name for trainable_layer in trainable_layers | |
| ): | |
| module_names.append(name) | |
| logger.info("Apply lora to layers: {}".format(",".join(map(str, trainable_layer_ids)))) | |
| return module_names | |
| def register_autoclass(config: "PretrainedConfig", model: "PreTrainedModel", tokenizer: "PreTrainedTokenizer"): | |
| if "AutoConfig" in getattr(config, "auto_map", {}): | |
| config.__class__.register_for_auto_class() | |
| if "AutoModelForCausalLM" in getattr(config, "auto_map", {}): | |
| model.__class__.register_for_auto_class() | |
| if "AutoTokenizer" in tokenizer.init_kwargs.get("auto_map", {}): | |
| tokenizer.__class__.register_for_auto_class() | |