[refactor] moving InsertPostInitMethodToModuleSubClasses to utils. (#824)

colossalai/utils/__init__.py

@@ -11,6 +11,7 @@ from .memory import (report_memory_usage, colo_device_memory_used, colo_set_proc
                      colo_device_memory_capacity, colo_set_cpu_memory_capacity, colo_get_cpu_memory_capacity)
 from .timer import MultiTimer, Timer
 from .tensor_detector import TensorDetector
+from .model.init_context import InsertPostInitMethodToModuleSubClasses
 
 __all__ = [
     'checkpoint', 'free_port', 'print_rank_0', 'sync_model_param', 'is_dp_rank_0', 'is_tp_rank_0',
@@ -20,5 +21,6 @@ __all__ = [
     'report_memory_usage', 'colo_device_memory_capacity', 'colo_device_memory_used', 'colo_set_process_memory_fraction',
     'Timer', 'MultiTimer', 'multi_tensor_applier', 'DataParallelSampler', 'get_dataloader',
     'switch_virtual_pipeline_parallel_rank', 'TensorDetector', 'load_checkpoint', 'save_checkpoint',
-    'ensure_path_exists', 'disposable', 'colo_set_cpu_memory_capacity', 'colo_get_cpu_memory_capacity'
+    'ensure_path_exists', 'disposable', 'colo_set_cpu_memory_capacity', 'colo_get_cpu_memory_capacity',
+    'InsertPostInitMethodToModuleSubClasses'
 ]

colossalai/utils/model/init_context.py

@@ -0,0 +1,81 @@
+import torch
+import functools
+from typing import Optional
+
+
+def _substitute_init_recursively(cls, func):
+    for subcls in cls.__subclasses__():
+        _substitute_init_recursively(subcls, func)
+        func(subcls)
+
+
+class InsertPostInitMethodToModuleSubClasses(object):
+
+    def __init__(self, default_dtype: Optional[torch.dtype] = None):
+        self._old_default_dtype = None
+        self._default_dtype = default_dtype
+
+    def __enter__(self):
+        r"""
+        Enter the context scope.
+        """
+        if self._default_dtype is not None:
+            self._old_default_dtype = torch.get_default_dtype()
+            torch.set_default_dtype(self._default_dtype)
+
+        def preprocess_after(f):
+
+            @functools.wraps(f)
+            def wrapper(module: torch.nn.Module, *args, **kwargs):
+                f(module, *args, **kwargs)
+                self._post_init_method(module)
+
+            return wrapper
+
+        def _enable_class(cls):
+            cls._old_init = cls.__init__
+            cls.__init__ = preprocess_after(cls.__init__)
+
+        # The function is called during init subclass.
+        def _init_subclass(cls, **kwargs):
+            cls.__init__ = preprocess_after(cls.__init__)
+
+        # Replace .__init__() for all existing subclasses of torch.nn.Module
+        # Excution self._post_init_method after the default init function.
+        _substitute_init_recursively(torch.nn.modules.module.Module, _enable_class)
+
+        # holding on to the current __init__subclass__ for exit
+        torch.nn.modules.module.Module._old_init_subclass = (torch.nn.modules.module.Module.__init_subclass__)
+        # Replace .__init__() for future subclasses of torch.nn.Module
+        torch.nn.modules.module.Module.__init_subclass__ = classmethod(_init_subclass)
+
+        self._pre_context_exec()
+
+    def __exit__(self, exc_type, exc_value, traceback):
+
+        if self._default_dtype is not None:
+            torch.set_default_dtype(self._old_default_dtype)
+
+        def _disable_class(cls):
+            cls.__init__ = cls._old_init
+
+        # Replace .__init__() for all existing subclasses of torch.nn.Module
+        _substitute_init_recursively(torch.nn.modules.module.Module, _disable_class)
+
+        # Replace .__init__() for future subclasses of torch.nn.Module
+        torch.nn.modules.module.Module.__init_subclass__ = (torch.nn.modules.module.Module._old_init_subclass)
+
+        self._post_context_exec()
+        # Now that we cleaned up the metaclass injection, raise the exception.
+        if exc_type is not None:
+            return False
+
+    # To be implemented by inheriting classes
+    def _post_init_method(self, module):
+        pass
+
+    def _pre_context_exec(self):
+        pass
+
+    def _post_context_exec(self):
+        pass

colossalai/zero/init_ctx/init_context.py

@@ -13,82 +13,7 @@ from colossalai.zero.shard_utils import BaseShardStrategy
 from colossalai.zero.sharded_model._utils import cast_tensor_to_fp16
 from colossalai.zero.sharded_param import ShardedParamV2
 from contextlib import AbstractContextManager
-
-
-def _substitute_init_recursively(cls, func):
-    for subcls in cls.__subclasses__():
-        _substitute_init_recursively(subcls, func)
-        func(subcls)
-
-
-class InsertPostInitMethodToModuleSubClasses(object):
-
-    def __init__(self, default_dtype: Optional[torch.dtype] = None):
-        self._old_default_dtype = None
-        self._default_dtype = default_dtype
-
-    def __enter__(self):
-        r"""
-        Enter the context scope.
-        """
-        if self._default_dtype is not None:
-            self._old_default_dtype = torch.get_default_dtype()
-            torch.set_default_dtype(self._default_dtype)
-        def preprocess_after(f):
-
-            @functools.wraps(f)
-            def wrapper(module: torch.nn.Module, *args, **kwargs):
-                f(module, *args, **kwargs)
-                self._post_init_method(module)
-
-            return wrapper
-
-        def _enable_class(cls):
-            cls._old_init = cls.__init__
-            cls.__init__ = preprocess_after(cls.__init__)
-
-        # The function is called during init subclass.
-        def _init_subclass(cls, **kwargs):
-            cls.__init__ = preprocess_after(cls.__init__)
-
-        # Replace .__init__() for all existing subclasses of torch.nn.Module
-        # Excution self._post_init_method after the default init function.
-        _substitute_init_recursively(torch.nn.modules.module.Module, _enable_class)
-
-        # holding on to the current __init__subclass__ for exit
-        torch.nn.modules.module.Module._old_init_subclass = (torch.nn.modules.module.Module.__init_subclass__)
-        # Replace .__init__() for future subclasses of torch.nn.Module
-        torch.nn.modules.module.Module.__init_subclass__ = classmethod(_init_subclass)
-
-        self._pre_context_exec()
-
-    def __exit__(self, exc_type, exc_value, traceback):
-
-        if self._default_dtype is not None:
-            torch.set_default_dtype(self._old_default_dtype)
-        def _disable_class(cls):
-            cls.__init__ = cls._old_init
-
-        # Replace .__init__() for all existing subclasses of torch.nn.Module
-        _substitute_init_recursively(torch.nn.modules.module.Module, _disable_class)
-
-        # Replace .__init__() for future subclasses of torch.nn.Module
-        torch.nn.modules.module.Module.__init_subclass__ = (torch.nn.modules.module.Module._old_init_subclass)
-
-        self._post_context_exec()
-        # Now that we cleaned up the metaclass injection, raise the exception.
-        if exc_type is not None:
-            return False
-
-    # To be implemented by inheriting classes
-    def _post_init_method(self, module):
-        pass
-
-    def _pre_context_exec(self):
-        pass
-
-    def _post_context_exec(self):
-        pass
+from colossalai.utils import InsertPostInitMethodToModuleSubClasses
 
 
 class ZeroContextConfig(object):