| |
| import copy |
| import inspect |
| from typing import List, Union |
|
|
| import torch |
| import torch.nn as nn |
|
|
| from mmengine.config import Config, ConfigDict |
| from mmengine.device import is_npu_available |
| from mmengine.registry import OPTIM_WRAPPER_CONSTRUCTORS, OPTIMIZERS |
| from .optimizer_wrapper import OptimWrapper |
|
|
|
|
| def register_torch_optimizers() -> List[str]: |
| """Register optimizers in ``torch.optim`` to the ``OPTIMIZERS`` registry. |
| |
| Returns: |
| List[str]: A list of registered optimizers' name. |
| """ |
| torch_optimizers = [] |
| for module_name in dir(torch.optim): |
| if module_name.startswith('__'): |
| continue |
| _optim = getattr(torch.optim, module_name) |
| if inspect.isclass(_optim) and issubclass(_optim, |
| torch.optim.Optimizer): |
| OPTIMIZERS.register_module(module=_optim) |
| torch_optimizers.append(module_name) |
| return torch_optimizers |
|
|
|
|
| TORCH_OPTIMIZERS = register_torch_optimizers() |
|
|
|
|
| def build_optim_wrapper(model: nn.Module, |
| cfg: Union[dict, Config, ConfigDict]) -> OptimWrapper: |
| """Build function of OptimWrapper. |
| |
| If ``constructor`` is set in the ``cfg``, this method will build an |
| optimizer wrapper constructor, and use optimizer wrapper constructor to |
| build the optimizer wrapper. If ``constructor`` is not set, the |
| ``DefaultOptimWrapperConstructor`` will be used by default. |
| |
| Args: |
| model (nn.Module): Model to be optimized. |
| cfg (dict): Config of optimizer wrapper, optimizer constructor and |
| optimizer. |
| |
| Returns: |
| OptimWrapper: The built optimizer wrapper. |
| """ |
| optim_wrapper_cfg = copy.deepcopy(cfg) |
| constructor_type = optim_wrapper_cfg.pop('constructor', |
| 'DefaultOptimWrapperConstructor') |
| paramwise_cfg = optim_wrapper_cfg.pop('paramwise_cfg', None) |
|
|
| |
| |
| |
| if is_npu_available(): |
| optim_wrapper_cfg['type'] = 'AmpOptimWrapper' |
|
|
| optim_wrapper_constructor = OPTIM_WRAPPER_CONSTRUCTORS.build( |
| dict( |
| type=constructor_type, |
| optim_wrapper_cfg=optim_wrapper_cfg, |
| paramwise_cfg=paramwise_cfg)) |
| optim_wrapper = optim_wrapper_constructor(model) |
| return optim_wrapper |
|
|
