# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved. # # 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 import copy from functools import reduce import paddle import paddle.fluid.core as core from paddle.utils import unique_name from paddle.fluid.layer_helper import LayerHelper from paddle.fluid.framework import Program, OpProtoHolder import paddle.fluid.layers.utils as utils from ..collective import _get_global_env from .dist_context import DistributedContext from .dist_attribute import OperatorDistributedAttribute, TensorDistributedAttribute from .process_group import new_process_group, ProcessGroup, _g_process_group_map class AllGatherOpDesc: """ Describe the allgather op in the reshard phase. Args: group (list): Process group. """ def __init__(self, group): self._group = group self._desc = "all_gather" @property def group(self): return self._group @property def desc(self): return self._desc def __repr__(self): return f"op: {self._desc}, group: {self._group}." class SendOpDesc: """ Describe the send op in the reshard phase. Args: partition_index (list): The index of partition in complete tensor. dst (int): The destination process to receive. """ def __init__(self, partition_index, dst): self._dst = dst self._partition_index = partition_index self._desc = "send" @property def partition_index(self): return self._partition_index @property def dst(self): return self._dst @property def desc(self): return self._desc def __repr__(self): return f"op: {self._desc}, partition_index: {self._partition_index}, dst: {self._dst}." class RecvOpDesc: """ Describe the recv op in the reshard op. Args: partition_index (list): The index of partition in complete tensor. src (int): The source process to send. """ def __init__(self, partition_index, src): self._src = src self._partition_index = partition_index self._desc = "recv" @property def partition_index(self): return self._partition_index @property def src(self): return self._src @property def desc(self): return self._desc def __repr__(self): return f"op: {self._desc}, partition_index: {self._partition_index}, src: {self._src}." class SliceOpDesc: """ Describe the slice op in the reshard phase. Args: starts (list): It represents starting indices of corresponding axis in ``axes``. ends (list): It represents ending indices of corresponding axis in ``axes``. axes (list): Axes that `starts` and `ends` apply to . """ def __init__(self, starts, ends, axes): self._starts = starts self._ends = ends self._axes = axes self._desc = "slice" @property def starts(self): return self._starts @property def ends(self): return self._ends @property def axes(self): return self._axes @property def desc(self): return self._desc def __repr__(self): return f"op: {self._desc}, starts: {self._starts}, ends: {self._ends}, axes: {self._axes}." class ConcatOpDesc: """ Describe the concat op in the reshard phase. Args: partition_index_list (list): A list contains all partition index. """ def __init__(self, partition_index_list): self._partition_index_list = partition_index_list self._desc = "concat" @property def partition_index_list(self): return self._partition_index_list @property def desc(self): return self._desc def __repr__(self): return f"op: {self._desc}, partition_index_list: {self._partition_index_list}." def _compute_partition_shape(complete_shape, dims_mapping, process_shape): """Compute the shape of partition.""" partition_shape = [] for idx, item in enumerate(complete_shape): if dims_mapping[idx] == -1: partition_shape.append(item) else: partition_shape.append(item // process_shape[dims_mapping[idx]]) return partition_shape def _compute_process_index(process, process_group, process_shape): """Compute the index of process_shape corresponding to the process.""" relative_process = process_group.index(process) process_index = [] product = reduce(lambda x, y: x * y, process_shape) for i in range(len(process_shape)): idx = relative_process // (product // process_shape[i]) product = product // process_shape[i] relative_process = relative_process - relative_process // product * product process_index.append(idx) return process_index def _compute_partition_index(process, complete_shape, dims_mapping, process_shape, process_group): """Compute the partition index in complete tensor.""" partition_shape = _compute_partition_shape(complete_shape, dims_mapping, process_shape) process_index = _compute_process_index(process, process_group, process_shape) partition_index = [] for i in range(len(complete_shape)): if dims_mapping[i] == -1: partition_index.append([0, partition_shape[i]]) else: partition_index.append([ process_index[dims_mapping[i]] * partition_shape[i], (process_index[dims_mapping[i]] + 1) * partition_shape[i] ]) return partition_index def _compute_concat_info(partition_index_x, partition_index_y): """Judge whether two partition can be concatenated and compute concatenated partition index.""" differ_count = 0 concat_axis = -1 first_order = 0 new_partition = [] for idx, item in enumerate(partition_index_x): if item != partition_index_y[idx]: differ_count += 1 if item[1] == partition_index_y[idx][0] and item[ 0] < partition_index_y[idx][1]: concat_axis = idx new_partition.append([item[0], partition_index_y[idx][1]]) elif item[0] == partition_index_y[idx][1] and item[ 1] > partition_index_y[idx][0]: first_order = 1 concat_axis = idx new_partition.append([partition_index_y[idx][0], item[1]]) else: new_partition.append(item) if differ_count == 1: return concat_axis, first_order, new_partition else: return -1, first_order, new_partition def _concat_partitions(partition_index_list, partition_index): """Concat the given partitions without inserting concat op.""" if not partition_index_list: partition_index_list.append(partition_index) else: i = 0 has_concat = False while i < len(partition_index_list): concat_axis, _, new_partition = _compute_concat_info( partition_index_list[i], partition_index) if concat_axis != -1: has_concat = True partition_index_list.pop(i) _concat_partitions(partition_index_list, new_partition) break i += 1 if not has_concat: partition_index_list.append(partition_index) def _is_overlapped(shape_x, shape_y): """Judge whether two partitions intersect on the specified dimension.""" overlapped = False if (shape_y[0] <= shape_x[0] < shape_y[1]) or ( shape_x[0] <= shape_y[0] < shape_x[1]): overlapped = True return overlapped def _need_reshard(dist_tensor, dist_op): """Judge the tensor whether needs to be resharded.""" is_reshard = False tensor_dist_attr = dist_tensor.dist_attr tensor_name = dist_tensor.serial_tensor.name tensor_dims_mapping = tensor_dist_attr.dims_mapping tensor_process_mesh = tensor_dist_attr.process_mesh op_dist_attr = dist_op.dist_attr op_input_dims_mapping = op_dist_attr.get_input_dims_mapping(tensor_name) op_process_mesh = op_dist_attr.process_mesh if all( map(lambda x: x is not None, [ tensor_dims_mapping, tensor_process_mesh, op_input_dims_mapping, op_process_mesh ])): if tensor_dims_mapping != op_input_dims_mapping or tensor_process_mesh != op_process_mesh: is_reshard = True return is_reshard def _compute_complete_shape(slice_shape, process_shape, dims_mapping): """compute the complete shape of the slice tensor with its process mesh and dims mapping""" complete_shape = [] for idx, item in enumerate(slice_shape): if dims_mapping[idx] == -1: complete_shape.append(item) else: complete_shape.append(item * process_shape[dims_mapping[idx]]) return complete_shape def find_op_desc_seq(dist_tensor, dist_op): """ Find the op description sequence to reshard the source tensor for matching the op requirement. Args: dist_tensor (DistributedTensor): A distributed tensor. dist_op (DistributedOperator): A distributed operator. Returns: Dict, the dict represents the required op description sequence corresponding to process, The key of dict is process and value is a list containing op description. """ tensor_dist_attr = dist_tensor.dist_attr source_tensor = dist_tensor.serial_tensor tensor_name = source_tensor.name source_dims_mapping = tensor_dist_attr.dims_mapping source_process_mesh = tensor_dist_attr.process_mesh source_process_group = source_process_mesh.processes source_process_shape = source_process_mesh.topology op_dist_attr = dist_op.dist_attr target_process_mesh = op_dist_attr.process_mesh target_dims_mapping = op_dist_attr.get_input_dims_mapping(tensor_name) target_process_group = target_process_mesh.processes target_process_shape = target_process_mesh.topology complete_shape = _compute_complete_shape( source_tensor.shape, source_process_shape, source_dims_mapping) op_desc_seq = {} # TODO: if the target process group has the same process with source process group if set(target_process_group).intersection(set( source_process_group)) and set(target_process_group).difference( set(source_process_group)): pass # in the different process group, it will use send, recv, concat and slice op elif target_process_group != source_process_group: partition_process_mapping_list = [] for source_process in source_process_group: source_partition_index = _compute_partition_index(source_process, complete_shape, source_dims_mapping, \ source_process_shape, source_process_group) if not partition_process_mapping_list: partition_process_mapping_list.append( [source_partition_index, [source_process], [False]]) else: partition_list = list( [item[0] for item in partition_process_mapping_list]) process_list = list( [item[1] for item in partition_process_mapping_list]) has_used = list( [item[2] for item in partition_process_mapping_list]) if partition_list.count(source_partition_index) == 1: index = partition_list.index(source_partition_index) process_list[index].append(source_process) has_used[index].append(False) else: partition_process_mapping_list.append( [source_partition_index, [source_process], [False]]) for target_process in target_process_group: has_sent = [] target_partition_index = _compute_partition_index( target_process, complete_shape, target_dims_mapping, target_process_shape, target_process_group) partition_index_list = [] all_partition_index_list = [] for source_process in source_process_group: source_partition_index = _compute_partition_index( source_process, complete_shape, source_dims_mapping, source_process_shape, source_process_group) to_send_process = None if all(_ for _ in list(map(_is_overlapped, source_partition_index, target_partition_index))) \ and source_partition_index not in has_sent: idx = list([ item[0] for item in partition_process_mapping_list ]).index(source_partition_index) has_used = list( [item[2] for item in partition_process_mapping_list])[idx] process_list = list( [item[1] for item in partition_process_mapping_list])[idx] i = 0 while i < len(has_used): if not has_used[i]: to_send_process = process_list[i] has_used[i] = True break i += 1 if i == len(has_used): has_used = list(map(lambda x: False, has_used)) to_send_process = process_list[0] has_used[0] = True assert to_send_process is not None, "Failed to find the send process." if to_send_process not in op_desc_seq.keys(): op_desc_seq[to_send_process] = [] if target_process not in op_desc_seq.keys(): op_desc_seq[target_process] = [] all_partition_index_list.append(source_partition_index) # append send and recv op desc send_op_desc = SendOpDesc(source_partition_index, target_process) recv_op_desc = RecvOpDesc(source_partition_index, to_send_process) op_desc_seq[to_send_process].append(send_op_desc) op_desc_seq[target_process].append(recv_op_desc) has_sent.append(source_partition_index) _concat_partitions(partition_index_list, source_partition_index) # append concat op desc op_desc_seq[target_process].append( ConcatOpDesc(all_partition_index_list)) # append slice op desc slice_starts = [] slice_ends = [] slices_axes = [] concatenated_partition_index = partition_index_list[0] for idx, item in enumerate(concatenated_partition_index): slice_starts.append(target_partition_index[idx][0] - item[0]) slice_ends.append(target_partition_index[idx][1] - item[0]) slices_axes.append(idx) op_desc_seq[target_process].append( SliceOpDesc(slice_starts, slice_ends, slices_axes)) # in the same process group, it will use allgahther and slice op else: partition_index_list = [] all_partition_index_list = [] process_index = [] for source_process in source_process_group: source_partition_index = _compute_partition_index( source_process, complete_shape, source_dims_mapping, source_process_shape, source_process_group) if source_partition_index not in partition_index_list: partition_index_list.append(source_partition_index) process_index.append( [[source_process, ], source_partition_index]) else: process_index[partition_index_list.index( source_partition_index)][0].append(source_process) for i in range(len(process_index[0][0])): group = [] for j in range(len(process_index)): group.append(process_index[j][0][i]) if i == 0: all_partition_index_list.append(process_index[j][1]) for process in group: # append slice op desc slice_starts = [] slice_ends = [] slices_axes = [] target_partition_index = _compute_partition_index( process, complete_shape, target_dims_mapping, target_process_shape, target_process_group) for idx, item in enumerate(target_partition_index): slice_starts.append(item[0]) slice_ends.append(item[1]) slices_axes.append(idx) slice_op_desc = SliceOpDesc( starts=slice_starts, ends=slice_ends, axes=slices_axes) op_desc_seq[process] = [AllGatherOpDesc(group=group), ConcatOpDesc(partition_index_list=all_partition_index_list), slice_op_desc] \ if len(group) > 1 else [slice_op_desc] return op_desc_seq def _insert_send_op(block, idx, tensor, dst): """Insert send op into block at the given index.""" op_type = 'send_v2' block._insert_op( idx, type=op_type, inputs={'X': [tensor]}, attrs={ 'ring_id': 0, 'peer': dst, 'use_calc_stream': True, }) def _insert_recv_op(block, idx, tensor, src): """Insert recv op into block at the given index.""" op_type = 'recv_v2' block._insert_op( idx, type=op_type, inputs={'X': [tensor]}, outputs={'Out': [tensor]}, attrs={ 'ring_id': 0, 'peer': src, 'out_shape': tensor.shape, 'dtype': tensor.dtype, 'use_calc_stream': True, }) def _insert_concat_op(block, idx, tensors, axis): """Insert concat op into block at the given block.""" inputs = {'X': tensors} attrs = {} attrs['axis'] = axis helper = LayerHelper('concat', **locals()) with paddle.static.program_guard(block.program): out = helper.create_variable_for_type_inference( dtype=helper.input_dtype()) block._insert_op( idx, type='concat', inputs=inputs, outputs={'Out': [out]}, attrs=attrs) return out def _insert_slice_op(block, idx, tensor, starts, ends, axes, new_var_name): """Insert slice op into block at the given block.""" inputs = {'Input': tensor} infer_flags = list(1 for i in range(len(axes))) attrs = { "axes": axes, "starts": starts, "ends": ends, "infer_flags": infer_flags } helper = LayerHelper('slice', **locals()) out = block.create_var( name=new_var_name, dtype=tensor.dtype, type=core.VarDesc.VarType.LOD_TENSOR) block._insert_op( idx, type="slice", inputs=inputs, outputs={'Out': [out]}, attrs=attrs) return out def _insert_split_op(block, idx, tensor, num_or_sections): """Insert split op into block at the given index.""" helper = LayerHelper('split', **locals()) input_shape = tensor.shape inputs = {'X': tensor} attrs = {'num': num_or_sections, "axis": 0} with paddle.static.program_guard(block.program): outs = [ helper.create_variable_for_type_inference( dtype=helper.input_dtype()) for i in range(num_or_sections) ] block._insert_op( idx, type="split", inputs=inputs, outputs={'Out': outs}, attrs=attrs) return outs def _insert_allgather_op(block, idx, tensor, ranks): """Insert allgather op into block at the given index.""" def _insert_fill_constant_op(block, idx): """Insert fill constant op into block at the given index.""" helper = LayerHelper("fill_constant", **locals()) with paddle.static.program_guard(block.program): out = helper.create_variable_for_type_inference(dtype="int32") inputs = {} attrs = {'force_cpu': False} attrs['str_value'] = str(int("1")) attrs['value'] = int("1") attrs['dtype'] = out.dtype utils.get_shape_tensor_inputs( inputs=inputs, attrs=attrs, shape=[0], op_type='fill_constant') block._insert_op( idx, type='fill_constant', inputs=inputs, outputs={'Out': [out]}, attrs=attrs) out.stop_gradient = True return out tensor_list = [] group = new_process_group(ranks) idx_offset = 0 # instant process group before insert allgather op. if not group.is_instantiate(): # insert fill_constant op fill_constant_out = _insert_fill_constant_op(block, idx) fill_constant_out.stop_gradient = True # insert c_allreduce_sum op block._insert_op( idx + 1, type="c_allreduce_sum", inputs={'X': [fill_constant_out]}, outputs={'Out': [fill_constant_out]}, attrs={'ring_id': 0, 'use_calc_stream': True}) # insert c_sync_calc_stream op block._insert_op( idx + 2, type="c_sync_calc_stream", inputs={'X': [fill_constant_out]}, outputs={'Out': [fill_constant_out]}) idx_offset = 3 # insert c_allgather op op_type = 'c_allgather' helper = LayerHelper(op_type, **locals()) with paddle.static.program_guard(block.program): allgather_out = helper.create_variable_for_type_inference( dtype=tensor.dtype) block._insert_op( idx + idx_offset, type=op_type, inputs={'X': [tensor]}, outputs={'Out': [allgather_out]}, attrs={ 'ring_id': group.id, 'use_calc_stream': True, 'nranks': group._nranks }) idx_offset += 1 # insert split op split_out = _insert_split_op(block, idx + idx_offset, allgather_out, group._nranks) idx_offset += 1 tensor_list.extend(split_out) return tensor_list, idx_offset def _concat_partitions_with_op(partition_tensor_list, tensor, partition_index, block, idx): """Concat the tensors and insert concat op.""" if not partition_tensor_list: partition_tensor_list.append((tensor, partition_index)) else: i = 0 has_concat = False while i < len(partition_tensor_list): concat_axis, first_order, new_partition = _compute_concat_info( partition_tensor_list[i][1], partition_index) if concat_axis != -1: has_concat = True _ = _insert_concat_op(block, idx[0], [partition_tensor_list[i][0], tensor], concat_axis) \ if first_order == 0 else \ _insert_concat_op(block, idx[0], [tensor, partition_tensor_list[i][0]], concat_axis) partition_tensor_list.pop(i) idx[0] += 1 _concat_partitions_with_op(partition_tensor_list, _, new_partition, block, idx) break i += 1 if not has_concat: partition_tensor_list.append((tensor, partition_index)) def _init_comm_for_send_recv(): if not _g_process_group_map: genv = _get_global_env() _g_process_group_map["global_group"] = ProcessGroup( 0, list(range(genv.world_size))) _g_process_group_map["global_group"].instantiate() HAS_SENT = {} HAS_RECV = {} HAS_ALLGATHER = {} def parse_op_desc(program, rank_id, op_desc_seq, var_name, reshard_op, dist_context): """Parse op desc sequence and insert op in the block""" global HAS_SENT global HAS_RECV global HAS_ALLGATHER tensor_list = [] partition_tensor_list = [] if rank_id not in op_desc_seq.keys(): return op_desc_list = op_desc_seq[rank_id] block = program.global_block() assert var_name in block.vars.keys( ), "The {} cannot be found in the {} program.".format(var_name, rank_id) idx = None for index, op in list(enumerate(block.ops)): if op.desc.id == reshard_op.desc.id: idx = index break assert idx is not None, "The op for reshard cannot be found in the rank {} program.".format( rank_id) matched_op = block.ops[idx] source_tensor = block.vars[var_name] for op_desc in op_desc_list: if isinstance(op_desc, AllGatherOpDesc): # noqa: F401 if var_name not in HAS_ALLGATHER.keys(): HAS_ALLGATHER[var_name] = [] if not HAS_ALLGATHER[var_name] or op_desc.group not in list( map(lambda x: x[0], HAS_ALLGATHER[var_name])): tensor_list, idx_offset = _insert_allgather_op( block, idx, source_tensor, op_desc.group) idx += idx_offset tensor_name_list = [var.name for var in tensor_list] HAS_ALLGATHER[var_name].append( [op_desc.group, tensor_name_list]) else: for item in HAS_ALLGATHER[var_name]: if op_desc.group == item[0]: tensor_list = [ program.global_block().vars[var_name] for var_name in item[1] ] break assert tensor_list, "The result of parsing allgather op should not be None." elif isinstance(op_desc, SendOpDesc): _init_comm_for_send_recv() if var_name not in HAS_SENT.keys(): HAS_SENT[var_name] = [] if op_desc.dst not in HAS_SENT[var_name]: _insert_send_op(block, idx, source_tensor, op_desc.dst) idx += 1 HAS_SENT[var_name].append(op_desc.dst) elif isinstance(op_desc, RecvOpDesc): _init_comm_for_send_recv() if var_name not in HAS_RECV.keys(): HAS_RECV[var_name] = {} if op_desc.src not in HAS_RECV[var_name].keys(): partition_index = op_desc.partition_index shape = [] for index in partition_index: shape.append(index[1] - index[0]) recv_tensor = block.create_var( name=unique_name.generate(var_name + "@recv"), shape=shape, dtype=source_tensor.dtype) _insert_recv_op(block, idx, recv_tensor, op_desc.src) tensor_list.append(recv_tensor) idx += 1 HAS_RECV[var_name][op_desc.src] = recv_tensor else: tensor_list.append(HAS_RECV[var_name][op_desc.src]) elif isinstance(op_desc, ConcatOpDesc): partition_index_list = op_desc.partition_index_list idx_list = [idx] for index, tensor in enumerate(tensor_list): _concat_partitions_with_op(partition_tensor_list, tensor, partition_index_list[index], block, idx_list) idx = idx_list[0] elif isinstance(op_desc, SliceOpDesc): assert len(partition_tensor_list) == 1 or not partition_tensor_list to_slice_tensor = partition_tensor_list[0][0] if len( partition_tensor_list) == 1 else source_tensor new_name = unique_name.generate(var_name + "@RESHARD") target_tensor = _insert_slice_op( block, idx, to_slice_tensor, starts=op_desc.starts, ends=op_desc.ends, axes=op_desc.axes, new_var_name=new_name) tensor_attr = TensorDistributedAttribute() process_mesh = dist_context.get_op_dist_attr_for_program( matched_op).process_mesh dims_mapping = dist_context.get_op_dist_attr_for_program( matched_op).get_input_dims_mapping(var_name) tensor_attr.dims_mapping = dims_mapping tensor_attr.process_mesh = process_mesh dist_context.set_tensor_dist_attr_for_program(target_tensor, tensor_attr) # rename op input name according to new name for op in block.ops: for name in op.input_arg_names: op_dist_attr = dist_context.get_op_dist_attr_for_program(op) if name == var_name and op_dist_attr is not None: op_process_mesh = op_dist_attr.process_mesh op_input_dims_mapping = op_dist_attr.get_input_dims_mapping( var_name) if op_process_mesh == process_mesh and op_input_dims_mapping == dims_mapping: op.desc._rename_input(name, target_tensor.name) op_dist_attr.set_input_dims_mapping( target_tensor.name, dims_mapping) op_dist_attr.set_input_dist_attr(name, None) def _remove_no_need_ops(auto_parallel_main_prog, dist_context, rank_id): """Remove no need ops in the main program""" not_remove_op_ref = [ "create_py_reader", "create_double_buffer_reader", "read" ] remove_op_idx = [] block = auto_parallel_main_prog.global_block() ops = block.ops vars = block.vars for idx, op in enumerate(ops): # handle read op in the pipeline scene specially, it will be removed in the future. if op.type == "read": dim_list = [] for var_name in op.output_arg_names: dim_list.extend(vars[var_name].shape) for i in range(idx, -1, -1): if ops[i].type == "create_py_reader": ops[i]._set_attr("shape_concat", dim_list) break continue # replace the input and output of c_sync_comm_stream op when in pipeline scene. if op.type == "c_sync_comm_stream": need_save = [] for var_name in op.input_arg_names: process_mesh = dist_context.get_tensor_dist_attr_for_program( vars[var_name]).process_mesh if rank_id in process_mesh.processes: need_save.append(var_name) if not need_save: remove_op_idx.append(idx) continue proto = OpProtoHolder.instance().get_op_proto(op.type) op.desc.set_input(proto.inputs[0].name, need_save) op.desc.set_output(proto.outputs[0].name, need_save) continue # judge the other op whether should be removed. op_dist_attr = dist_context.get_op_dist_attr_for_program(op) if op_dist_attr is not None: op_process_mesh = op_dist_attr.process_mesh if rank_id not in op_process_mesh.processes and op.type not in not_remove_op_ref: remove_op_idx.append(idx) for idx in remove_op_idx[::-1]: block._remove_op(idx) def _remove_no_need_vars(auto_parallel_main_prog): """Remove no need vars in the main program""" remove_vars = set() block = auto_parallel_main_prog.global_block() ops = block.ops vars = block.vars need_vars = set() for op in ops: for var_name in op.input_arg_names: if var_name in vars: need_vars.add(var_name) for var_name in op.output_arg_names: if var_name in vars: need_vars.add(var_name) for var in vars: if var not in need_vars: remove_vars.add(var) for var in remove_vars: block._remove_var(var) def remove_no_need_in_main(auto_parallel_main_prog, dist_context, rank_id): """Remove no need vars and ops in the main program.""" _remove_no_need_ops(auto_parallel_main_prog, dist_context, rank_id) _remove_no_need_vars(auto_parallel_main_prog) def remove_no_need_in_startup(auto_parallel_main_prog, auto_parallel_startup_prog): """Remove no need vars and ops in the startup program.""" main_input_vars = set() main_ops = auto_parallel_main_prog.global_block().ops for op in main_ops: for var_name in op.input_arg_names: main_input_vars.add(var_name) startup_block = auto_parallel_startup_prog.global_block() startup_output_vars = set() startup_ops = startup_block.ops for op in startup_ops: # skip c_sync_comm_stream op if op.type == "c_sync_comm_stream": continue for var_name in op.output_arg_names: startup_output_vars.add(var_name) need_vars = set() for var_name in startup_output_vars: if var_name in main_input_vars: need_vars.add(var_name) startup_ops = startup_block.ops actual_need_vars = set() for idx, op in enumerate(startup_ops): is_need_op = False if op.type == "c_sync_comm_stream": continue for var_name in op.output_arg_names: if var_name in need_vars: is_need_op = True break if is_need_op: for var_name in op.output_arg_names: actual_need_vars.add(var_name) for var_name in op.input_arg_names: actual_need_vars.add(var_name) remove_vars = set() for var_name in startup_block.vars: if var_name not in actual_need_vars: remove_vars.add(var_name) for var in remove_vars: startup_block._remove_var(var) remove_op_idx = [] vars = startup_block.vars for idx, op in enumerate(startup_block.ops): is_no_need_op = False if op.type == "c_sync_comm_stream": var_names = [] for var_name in op.input_arg_names: if var_name in vars: var_names.append(var_name) if not var_names: remove_op_idx.append(idx) else: proto = OpProtoHolder.instance().get_op_proto(op.type) op.desc.set_input(proto.inputs[0].name, var_names) op.desc.set_output(proto.outputs[0].name, var_names) continue for var_name in op.output_arg_names: if var_name not in vars: is_no_need_op = True break if is_no_need_op: remove_op_idx.append(idx) for idx in remove_op_idx[::-1]: startup_block._remove_op(idx) def reshard(auto_parallel_main_prog, auto_parallel_startup_prog, rank_id, dist_context): """ Reshard tensor in the program according to its dist attr and corresponding op dist attr. Args: auto_parallel_main_prog (Program): An auto parallel main program. auto_parallel_startup_prog (Program): An auto parallel startup program. rank_id (int): The process id. """ assert isinstance(auto_parallel_main_prog, Program), "The type of auto_parallel_main_prog should be Program, " \ "but got {}.".format(type(auto_parallel_main_prog)) assert isinstance(auto_parallel_main_prog, Program), "The type of auto_parallel_startup_prog should be Program, " \ "but got {}.".format(type(auto_parallel_startup_prog)) assert isinstance(rank_id, int), "The type of rank_id should be int, " \ "but got {}.".format(type(rank_id)) assert isinstance(dist_context, DistributedContext), "The type of dist_context should be DistributedContext, " \ "but got {}.".format(type(dist_context)) block = auto_parallel_main_prog.global_block() idx = 0 while idx < len(block.ops): pre_op_count = len(block.ops) op = block.ops[idx] dist_op = dist_context.get_dist_op_for_program(op) if dist_op is not None: idx_offset = 0 for var_name in op.input_arg_names: # skip lod_tensor_blocking_queue_0 if var_name == "lod_tensor_blocking_queue_0": continue var = block.vars[var_name] dist_tensor = dist_context.get_dist_tensor_for_program(var) if dist_tensor is not None and _need_reshard(dist_tensor, dist_op): reshard_op_desc = find_op_desc_seq(dist_tensor, dist_op) parse_op_desc(auto_parallel_main_prog, rank_id, reshard_op_desc, var_name, op, dist_context) cur_op_count = len(block.ops) idx_offset = idx_offset + cur_op_count - pre_op_count pre_op_count = cur_op_count idx = idx + idx_offset + 1 else: idx += 1 # remove no need vars and ops in the main program remove_no_need_in_main(auto_parallel_main_prog, dist_context, rank_id) # remove no need vars and ops in the startip program remove_no_need_in_startup(auto_parallel_main_prog, auto_parallel_startup_prog)