[Auto Parallel] Logical Partition & Dist Op

python/paddle/distributed/auto_parallel/attribute.py

@@ -14,6 +14,7 @@
 
 import copy
 from collections import defaultdict
+from paddle.fluid import core
 
 
 class TensorDistributedAttribute:
@@ -77,6 +78,8 @@ def mark_as_parameter(self):
         self._is_parameter = True
 
     def is_valid(self):
+        if self.get_owner_tensor().type == core.VarDesc.VarType.READER:
+            return True
         tensor_shape = self.get_owner_tensor().desc.shape()
         if len(tensor_shape) != len(self.get_dims_mapping()):
             return False
@@ -222,6 +225,8 @@ def mark_as_parameter(self, name):
         self._is_parameters[name] = True
 
     def is_valid(self):
+        if "read" in self.get_owner_op().type:
+            return True
         for name in self.get_owner_op().desc.input_arg_names():
             dims_mapping = self.get_input_dims_mapping(name)
             shape = self.get_input_shape(name)

python/paddle/distributed/auto_parallel/context.py

@@ -15,9 +15,11 @@
 import copy
 from collections import defaultdict
 from paddle.fluid import framework
+from paddle.fluid import core
 from .attribute import TensorDistributedAttribute
 from .attribute import OperatorDistributedAttribute
 from .utils import append_distributed_attr_suffix
+from .interface import _g_process_mesh_map
 
 # There always exists a default context for user. And user can set it to another one.
 DEFAULT_DISTRIBUTED_CONTEXT = None
@@ -49,6 +51,20 @@ def __init__(self):
         self._op_distributed_attr_map_for_program = {}
         self._tensor_distributed_attr_map_for_graph = {}
         self._op_distributed_attr_map_for_graph = {}
+        # The following is a hard code and will be removed in the future
+        self._data_parallel_axis = None
+        self._model_parallel_axis = None
+        self._process_mesh = _g_process_mesh_map.get(0, None)
+        if self._process_mesh is not None:
+            if self._process_mesh.ndim == 1:
+                self._data_parallel_axis = 0
+                self._model_parallel_axis = 0
+            else:
+                self._data_parallel_axis = 0
+                self._model_parallel_axis = 1
+        else:
+            self._data_parallel_axis = -1
+            self._model_parallel_axis = -1
 
     def is_initialized_for_program(self):
         return self._is_initialized_for_program
@@ -99,6 +115,19 @@ def set_op_distributed_attr_for_graph(self, op_node, op_dist_attr):
         op_node_id = op_node.id()
         self._op_distributed_attr_map_for_graph[op_node_id] = op_dist_attr
 
+    def set_process_mesh(self, process_mesh):
+        self._process_mesh = process_mesh
+        if self._process_mesh is not None:
+            if self._process_mesh.ndim == 1:
+                self._data_parallel_axis = 0
+                self._model_parallel_axis = 0
+            else:
+                self._data_parallel_axis = 0
+                self._model_parallel_axis = 1
+        else:
+            self._data_parallel_axis = -1
+            self._model_parallel_axis = -1
+
     def initialize_distributed_attr_for_program(self, program):
         if self._is_initialized_for_program:
             return
@@ -377,3 +406,11 @@ def amend_distributed_attr_for_program(self):
                     if dims_mapping[i] != -1 and process_mesh_shape[
                             dims_mapping[i]] > tensor_shape[i]:
                         dims_mapping[i] = -1
+
+    def _get_data_parallel_info(self):
+        # This function is a hard code, and will be obsoleted in the future
+        return self._data_parallel_axis, self._process_mesh
+
+    def _get_model_parallel_info(self):
+        # This function is a hard code, and will be obsoleted in the future
+        return self._model_parallel_axis, self._process_mesh

python/paddle/distributed/auto_parallel/interface.py

@@ -184,6 +184,13 @@ def parent(self):
             "parent with id %d does not exist." % self._parent_id)
         return _g_process_mesh_map[self._parent_id]
 
+    @property
+    def ndim(self):
+        r"""
+        Get the number of dimension of ProcessMesh.
+        """
+        return len(self._topology)
+
     def set_placement(self, order):
         """
         Set the map from logical processes to physical ones using the
@@ -229,6 +236,13 @@ def set_placement(self, order):
         for idx, l_id in enumerate(logical_order):
             _user_defined_physical_map[l_id] = order[idx]
 
+    def _reset_global_process_mesh_map(self):
+        """
+        Remove all process mesh in _g_process_mesh_map, make it empty.
+        """
+
+        _g_process_mesh_map = dict()
+
     def __eq__(self, other):
         assert other and isinstance(other, ProcessMesh)
         if self.topology != other.topology or self.process_group != other.process_group:

python/paddle/distributed/auto_parallel/operators/common.py

@@ -33,6 +33,8 @@ def get_impls(self):
 class DistributedOperatorImpl:
     def __init__(self):
         self._name = None
+        self._forward_implemented = False
+        self._backward_implemented = False
 
     def forward(self, dist_ctx, *args, **kwargs):
         raise NotImplementedError("Please Implement this method in Subclass.")

python/paddle/distributed/auto_parallel/operators/dist_embedding.py

@@ -22,6 +22,12 @@
 from ..utils import compute_compatible_dim_mapping
 from ..utils import compute_compatible_dims_mapping
 from ..utils import compute_compatible_and_update_dim_mapping
+from paddle.fluid import core, unique_name
+from paddle.fluid.framework import in_dygraph_mode
+from paddle.fluid.framework import Program, Parameter, Variable, program_guard
+from paddle.fluid.data_feeder import check_variable_and_dtype, check_dtype
+from ..process import new_process_group
+from ..utils import _get_comm_group
 
 
 class DistributedEmbedding(DistributedOperator):
@@ -39,6 +45,8 @@ class DistributedEmbeddingImpl(DistributedOperatorImpl):
     def __init__(self, name):
         super(DistributedEmbeddingImpl, self).__init__()
         self._name = name
+        self._forward_implemented = True
+        self._backward_implemented = False
 
     def is_process_mesh_compatible(self, op_dist_attr):
         """ No restriction for now. """
@@ -92,6 +100,110 @@ def update_dims_mapping(self, op_dist_attr):
 
         return changed
 
+    def forward(self, serial_op):
+        def static_handle(dst_block,
+                          src_op,
+                          op_dist_attr,
+                          input_name_mapping,
+                          output_name_mapping,
+                          rank_id=0):
+            assert len(
+                input_name_mapping
+            ) == 2, "row_parallel_embedding take 2 inputs variable but got {}".format(
+                input_name_mapping)
+            assert len(
+                output_name_mapping
+            ) == 1, "row_parallel_embedding take 2 inputs variable but got {}".format(
+                output_name_mapping)
+            assert len(
+                input_name_mapping['Ids']
+            ) == 1, "row_parallel_embedding input Ids take 1 variable but got {}".format(
+                input_name_mapping['Ids'])
+            assert len(
+                input_name_mapping['W']
+            ) == 1, "row_parallel_embedding input W take 1 variable but got {}".format(
+                input_name_mapping['W'])
+            assert len(
+                output_name_mapping['Out']
+            ) == 1, "row_parallel_embedding input Out take 1 variable but got {}".format(
+                input_name_mapping['Out'])
+
+            Ids_var = dst_block.var(input_name_mapping['Ids'][0])
+            Weight_var = dst_block.var(input_name_mapping['W'][0])
+            Out_var = dst_block.var(output_name_mapping['Out'][0])
+
+            # got dist attribute info
+            embedding_row_dim_mapping = op_dist_attr.get_input_dims_mapping(
+                Weight_var.name)[0]
+            process_mesh_shape = op_dist_attr.get_process_mesh().topology
+            process_mesh_group = op_dist_attr.get_process_mesh().process_group
+
+            # caculate embedding offset
+            # TODO generalize here, using cartisian product to allow any dimensional mesh shape
+            mesh_shape = len(process_mesh_shape)
+            assert mesh_shape <= 2, "row_parallel_embedding only support 1 or 2 dimensional process mesh, but got {}".format(
+                process_mesh_shape)
+            num_partition = process_mesh_shape[embedding_row_dim_mapping]
+            # TODO generalize here, support any mesh group 
+            if mesh_shape == 1:
+                relative_idx = process_mesh_group.index(rank_id)
+            else:
+                relative_idx = rank_id % num_partition
+
+            per_part_size = Weight_var.shape[0]
+            relative_idx = relative_idx * per_part_size
+
+            # TODO caculate ring id 
+            model_parallel_axis, process_mesh = op_dist_attr.get_owner_context(
+            )._get_model_parallel_info()
+            group_ranks = _get_comm_group(process_mesh.process_group,
+                                          process_mesh.topology,
+                                          model_parallel_axis, rank_id)
+            group = new_process_group(group_ranks)
+
+            # append op
+            check_variable_and_dtype(Ids_var, 'input', ['int32', 'int64'],
+                                     'c_embedding')
+
+            intermediate_var_0 = dst_block.create_var(
+                name=unique_name.generate_with_ignorable_key(".".join(
+                    ["c_embedding", 'tmp'])),
+                dtype=Weight_var.dtype,
+                shape=Out_var.shape,
+                type=core.VarDesc.VarType.LOD_TENSOR,
+                persistable=False,
+                stop_gradient=Out_var.stop_gradient)
+
+            check_variable_and_dtype(
+                Out_var, 'tensor',
+                ['float16', 'float32', 'float64', 'int32', 'int64'],
+                'c_allreduce_sum')
+
+            dst_block.append_op(
+                type='c_embedding',
+                inputs={'Ids': [Ids_var],
+                        'W': [Weight_var]},
+                outputs={'Out': [intermediate_var_0]},
+                attrs={"start_index": relative_idx})
+
+            # use_model_parallel
+            dst_block.append_op(
+                type='c_allreduce_sum',
+                inputs={'X': [intermediate_var_0]},
+                outputs={'Out': [Out_var]},
+                attrs={
+                    'ring_id': group.id,
+                    'use_calc_stream': True,
+                    'use_model_parallel': True,
+                })
+
+        if in_dygraph_mode():
+            raise NotImplementedError(
+                "Dist op for [{}] with idx [{}] is NOT implemented yet.".format(
+                    "matmul", 0))
+        else:
+            return static_handle
+
 
 register_distributed_operator_impl("lookup_table_v2",
                                    DistributedEmbeddingImpl("row_parallel"))