[Tensor] activation is an attr of ColoTensor (#897)

colossalai/tensor/_ops/linear.py

@@ -19,7 +19,9 @@ def colo_linear_1Drow(input_tensor: ColoTensor, weight: ColoTensor, bias:ColoTen
         assert divide(input_tensor.shape[-1], gpc.tensor_parallel_size) == weight.size(-1), \
         'Invalid shapes in 1Drow forward: input={}, weight={}. Expected last dim of input {}.'.format(
         input_tensor.shape, weight.size, weight.size(-1) * gpc.tensor_parallel_size)
-        input_per_partition = split_forward_gather_backward(input_tensor.torch_tensor(), parallel_action.parallel_mode, dim=-1)
+        input_per_partition = split_forward_gather_backward(input_tensor.torch_tensor(),
+                                                            parallel_action.parallel_mode,
+                                                            dim=-1)
     elif input_tensor.shard_pattern == ShardPattern.Col:
         # Splited by 1Dcol
         assert input_tensor.shape[-1] == weight.size(-1), \
@@ -40,6 +42,7 @@ def colo_linear_1Drow(input_tensor: ColoTensor, weight: ColoTensor, bias:ColoTen
     output = ColoTensor.init_from_torch_tensor(output)
     return output
 
+
 def colo_linear_1Dcol(input_tensor: ColoTensor, weight: ColoTensor, bias: ColoTensor) -> ColoTensor:
     # Input:B x Weight:S[1] + Bias:S[1] = Output:S[1]
     # All-Gather(Output)
@@ -61,12 +64,7 @@ def colo_linear_1Dcol(input_tensor: ColoTensor, weight: ColoTensor, bias:ColoTen
     output_parallel = torch.nn.functional.linear(input_parallel, weight.torch_tensor(), bias.torch_tensor())
 
     output = ColoTensor.init_from_torch_tensor(output_parallel)
-    out_parallel_action_list = [
-        ParallelAction(
-            priority=1, compute_pattern=ComputePattern.Activation, 
-            parallel_mode=parallel_action.parallel_mode
-        )
-    ]
+    out_parallel_action_list = [ParallelAction(priority=1, parallel_mode=parallel_action.parallel_mode)]
     output_spec = TensorSpec(out_parallel_action_list)
     output.set_spec(output_spec, shard=False)
     output.set_shard_pattern(ShardPattern.Col)
@@ -75,6 +73,7 @@ def colo_linear_1Dcol(input_tensor: ColoTensor, weight: ColoTensor, bias:ColoTen
         output.gather()
     return output
 
+
 @colo_op_impl(torch.nn.functional.linear)
 def colo_linear(types, args, kwargs, pg):
     """Handles ``__torch_function__`` dispatch for ``torch.nn.functional.linear``.

colossalai/tensor/colo_tensor.py

@@ -7,6 +7,13 @@ from colossalai.core import global_context as gpc
 from colossalai.nn.layer.utils import divide
 from colossalai.tensor import TensorSpec, ComputePattern, ShardPattern
 from colossalai.nn.layer.parallel_1d._utils import split_forward_gather_backward, gather_forward_split_backward
+from enum import Enum
+
+
+class TensorType(Enum):
+    MODEL = 0
+    NONMODEL = 1    # mainly activations
+
 
 class ColoTensor(object):
     """ Data Structure for Tensor in Colossal-AI
@@ -28,6 +35,7 @@ class ColoTensor(object):
             device=None,
             torch_tensor=torch.empty(0),
             shard_spec: TensorSpec = TensorSpec(),
+            is_model_data: bool = False,
     ):
         self._size = size
         self._dtype = dtype
@@ -37,6 +45,10 @@ class ColoTensor(object):
         self._torch_tensor = torch_tensor
         self._shard_spec = shard_spec
         self._shard_pattern = ShardPattern.NA
+        if is_model_data:
+            self._type = TensorType.MODEL
+        else:
+            self._type = TensorType.NONMODEL
 
     def __getitem__(self, key):
         return ColoTensor.init_from_torch_tensor(self.torch_tensor()[key])
@@ -85,13 +97,14 @@ class ColoTensor(object):
         return product(self._size)
 
     @staticmethod
-    def init_from_torch_tensor(tensor: torch.Tensor, save_payload=True) -> 'ColoTensor':
+    def init_from_torch_tensor(tensor: torch.Tensor, save_payload=True, is_model_data=False) -> 'ColoTensor':
         colo_t = ColoTensor(*tensor.size(),
                             dtype=tensor.dtype,
                             requires_grad=tensor.requires_grad,
                             pin_memory=tensor.is_pinned(),
                             device=tensor.device,
-                            torch_tensor=tensor if save_payload else torch.empty(0))
+                            torch_tensor=tensor if save_payload else torch.empty(0),
+                            is_model_data=is_model_data)
         return colo_t
 
     def del_torch_tensor(self, save_shape=False) -> None:
@@ -130,21 +143,18 @@ class ColoTensor(object):
             self.gather()
         # Model Parameters
         if ComputePattern.TP1DRow in self._shard_spec.compute_patterns:
-            parallel_action = self._shard_spec.get_action_by_compute_pattern(
-                ComputePattern.TP1DRow)
+            parallel_action = self._shard_spec.get_action_by_compute_pattern(ComputePattern.TP1DRow)
             self._shard_1d(parallel_action=parallel_action, dim=-1)
             self._shard_pattern = ShardPattern.Col    # We bind our ComputePattern on weight, which has to be transposed when linear().
         elif ComputePattern.TP1DCol in self._shard_spec.compute_patterns:
-            parallel_action = self._shard_spec.get_action_by_compute_pattern(
-                ComputePattern.TP1DCol)
+            parallel_action = self._shard_spec.get_action_by_compute_pattern(ComputePattern.TP1DCol)
             self._shard_1d(parallel_action=parallel_action, dim=0)
             self._shard_pattern = ShardPattern.Row
 
     def gather(self):
         assert self.is_activation(), 'Currently we only support gather Activation ColoTensor.'
         assert not self.is_gathered(), 'Only sharded ColoTensor can be gathered.'
-        parallel_action = self._shard_spec.get_action_by_compute_pattern(
-            ComputePattern.Activation)
+        parallel_action = self._shard_spec.get_action_by_compute_pattern(ComputePattern.DP)
         if self._shard_pattern == ShardPattern.Row:
             dim = 0
         elif self._shard_pattern == ShardPattern.Col:
@@ -159,8 +169,7 @@ class ColoTensor(object):
         return self._shard_spec is not None and self._shard_spec.num_action > 0
 
     def is_activation(self) -> bool:
-        return self._shard_spec is not None and self._shard_spec.num_action == 1 \
-            and ComputePattern.Activation in self._shard_spec.compute_patterns
+        return self._type == TensorType.NONMODEL
 
     def _shard_1d(self, parallel_action, dim=-1):
         num_partition = gpc.get_world_size(parallel_action.parallel_mode)
@@ -169,8 +178,8 @@ class ColoTensor(object):
         # Reshape to get shard for this rank and we don't want autograd
         # recording here for the narrow op and 'local_shard' should be a
         # leaf variable in the autograd graph.
-        self._torch_tensor = self._torch_tensor.narrow(dim, local_rank * chunk_size, chunk_size).detach(
-        ).contiguous()    # TODO Shall we clone() here since detach() will point to the old tensor?
+        self._torch_tensor = self._torch_tensor.narrow(dim, local_rank * chunk_size, chunk_size).detach().contiguous(
+        )    # TODO Shall we clone() here since detach() will point to the old tensor?
         self._torch_tensor.requires_grad = self._requires_grad
         self._size = self._torch_tensor.size()
 

colossalai/tensor/spec.py

@@ -4,20 +4,25 @@ from colossalai.context.parallel_mode import ParallelMode
 
 
 class ComputePattern(Enum):
-    Activation = 0 # TODO(jzy) A tmp place to store Activation info. Find a better place in future.
     TP1DRow = 1
     TP1DCol = 2
     ZeRO = 3
     DP = 4
 
+
 class ShardPattern(Enum):
     NA = 0
     Row = 1
     Col = 2
 
+
 class ParallelAction(object):
 
-    def __init__(self, priority=0, compute_pattern=ComputePattern.DP, parallel_mode=ParallelMode.DATA, gather_out=True) -> None:
+    def __init__(self,
+                 priority=0,
+                 compute_pattern=ComputePattern.DP,
+                 parallel_mode=ParallelMode.DATA,
+                 gather_out=True) -> None:
         self.priority = priority
         self.compute_pattern = compute_pattern
         self.parallel_mode = parallel_mode

colossalai/utils/model/colo_init_context.py

@@ -94,7 +94,10 @@ class ColoInitContext(InsertPostInitMethodToModuleSubClasses):
         save_torch_payload = True if not self._lazy_memory_allocate else False
         for name, param in name_list:
             delattr(module, name)
-            setattr(module, name,
-                    ColoTensor.init_from_torch_tensor(tensor=param.to(self._device), save_payload=save_torch_payload))
+            setattr(
+                module, name,
+                ColoTensor.init_from_torch_tensor(tensor=param.to(self._device),
+                                                  save_payload=save_torch_payload,
+                                                  is_model_data=True))
 
         ColoModulize(module)