mirror of https://github.com/hpcaitech/ColossalAI
179 lines
7.8 KiB
Python
179 lines
7.8 KiB
Python
from copy import deepcopy
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from typing import Dict, List
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import torch
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from torch.fx.node import Node
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from colossalai.auto_parallel.tensor_shard.sharding_strategy import (
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CommAction,
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CommType,
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OperationData,
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OperationDataType,
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)
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from colossalai.device.device_mesh import DeviceMesh
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from colossalai.tensor.comm_spec import CommSpec
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from colossalai.tensor.shape_consistency import ShapeConsistencyManager
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shape_consistency_manager = ShapeConsistencyManager()
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def runtime_apply(node: Node, origin_dict: Dict, input_dict: Dict, node_index: int, user_node_index: int):
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"""
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This method will be invoked during runtime to do the shape consistency, which make sure the activations is converted into
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the user node expected form.
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"""
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origin_sharding_spec = origin_dict[node_index]
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target_sharding_spec = input_dict[node_index][user_node_index]
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return shape_consistency_manager.apply_for_autoparallel_runtime(node, origin_sharding_spec, target_sharding_spec)
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def runtime_comm_spec_apply(tensor: torch.Tensor, comm_actions_dict: Dict, node_index: int, op_data_name: str):
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"""
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This method will be invoked during runtime to apply the comm action following the instruction of comm spec.
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"""
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comm_action = comm_actions_dict[node_index][op_data_name]
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if isinstance(comm_action.comm_spec, CommSpec):
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rst = comm_action.comm_spec.covert_spec_to_action(tensor)
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else:
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origin_sharding_spec = comm_action.comm_spec['src_spec']
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tgt_sharding_spec = comm_action.comm_spec['tgt_spec']
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rst = shape_consistency_manager.apply_for_autoparallel_runtime(tensor, origin_sharding_spec, tgt_sharding_spec)
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return rst
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def _preprocess_graph(nodes: List[Node]):
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"""
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This method is used to extract all the placeholders with sharding information,
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and mapping the nodes into the index of the origin graph.
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"""
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# mapping the node into the origin graph index
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node_to_index_dict = {}
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index = 0
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for node in nodes:
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if node.target == 'sharding_spec_convert_dict':
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input_dict_node = node
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continue
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if node.target == 'origin_node_sharding_spec_dict':
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origin_dict_node = node
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continue
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if node.target == 'comm_actions_dict':
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comm_actions_dict_node = node
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continue
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if not hasattr(node, 'best_strategy'):
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continue
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node_to_index_dict[node] = index
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index += 1
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return input_dict_node, origin_dict_node, comm_actions_dict_node, node_to_index_dict
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def _shape_consistency_apply(gm: torch.fx.GraphModule):
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"""
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This pass is used to add the shape consistency node to the origin graph.
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"""
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mod_graph = gm.graph
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nodes = tuple(mod_graph.nodes)
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input_dict_node, origin_dict_node, _, node_to_index_dict = _preprocess_graph(nodes)
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for node in nodes:
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if not hasattr(node, 'best_strategy') or node.op == 'output':
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continue
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for user_node_index, user_node in enumerate(node.strategies_vector.successor_nodes):
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with mod_graph.inserting_before(user_node):
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shape_consistency_node = mod_graph.create_node('call_function',
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runtime_apply,
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args=(node, origin_dict_node, input_dict_node,
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node_to_index_dict[node], user_node_index))
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new_args = list(user_node.args)
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new_kwargs = dict(user_node.kwargs)
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# the origin node may be a positional argument or key word argument of user node
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if node in new_args:
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# substitute the origin node with shape_consistency_node
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origin_index_args = new_args.index(node)
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new_args[origin_index_args] = shape_consistency_node
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user_node.args = tuple(new_args)
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elif str(node) in new_kwargs:
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# substitute the origin node with shape_consistency_node
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new_kwargs[str(node)] = shape_consistency_node
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user_node.kwargs = new_kwargs
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return gm
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def _comm_spec_apply(gm: torch.fx.GraphModule):
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"""
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This pass is used to add the comm spec apply node to the origin graph.
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"""
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mod_graph = gm.graph
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nodes = tuple(mod_graph.nodes)
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_, _, comm_actions_dict_node, node_to_index_dict = _preprocess_graph(nodes)
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for node in nodes:
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if not hasattr(node, 'best_strategy') or node.op == 'output':
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continue
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comm_actions = node.best_strategy.communication_actions
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for op_data, comm_action in comm_actions.items():
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if comm_action.comm_type == CommType.HOOK:
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continue
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if comm_action.comm_type == CommType.BEFORE:
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if op_data.type == OperationDataType.OUTPUT:
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comm_object = node
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elif comm_action.key_for_kwarg is not None:
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comm_object = node.kwargs[comm_action.key_for_kwarg]
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else:
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comm_object = node.args[comm_action.arg_index]
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with mod_graph.inserting_before(node):
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comm_spec_apply_node = mod_graph.create_node('call_function',
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runtime_comm_spec_apply,
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args=(comm_object, comm_actions_dict_node,
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node_to_index_dict[node], op_data.name))
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# the origin node may be a positional argument or key word argument of user node
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if comm_action.key_for_kwarg is not None:
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# substitute the origin node with comm_spec_apply_node
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new_kwargs = dict(node.kwargs)
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new_kwargs[comm_action.key_for_kwarg] = comm_spec_apply_node
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node.kwargs = new_kwargs
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else:
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# substitute the origin node with comm_spec_apply_node
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new_args = list(node.args)
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new_args[comm_action.arg_index] = comm_spec_apply_node
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node.args = tuple(new_args)
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elif comm_action.comm_type == CommType.AFTER:
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with mod_graph.inserting_after(node):
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comm_spec_apply_node = mod_graph.create_node('call_function',
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runtime_comm_spec_apply,
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args=(node, comm_actions_dict_node,
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node_to_index_dict[node], op_data.name))
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user_list = list(node.users.keys())
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for user in user_list:
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if user == comm_spec_apply_node:
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continue
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new_args = list(user.args)
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new_kwargs = dict(user.kwargs)
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# the origin node may be a positional argument or key word argument of user node
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if node in new_args:
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# substitute the origin node with comm_spec_apply_node
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new_args[new_args.index(node)] = comm_spec_apply_node
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user.args = tuple(new_args)
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elif str(node) in new_kwargs:
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# substitute the origin node with comm_spec_apply_node
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new_kwargs[str(node)] = comm_spec_apply_node
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user.kwargs = new_kwargs
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return gm
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def runtime_apply_pass(gm: torch.fx.GraphModule):
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"""
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The method manages all the passes acting on the distributed training runtime.
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"""
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gm = _shape_consistency_apply(gm)
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gm = _comm_spec_apply(gm)
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return gm
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