feat(checkpoint): TP recomputation communication optimization

configs/7B_internlm2.py

@@ -1,5 +1,5 @@
 JOB_NAME = "7b_internlm2_train"
-model_type="INTERNLM2_PUBLIC"
+model_type = "INTERNLM2_PUBLIC"
 DO_ALERT = False
 
 VOCAB_SIZE = 92544
@@ -128,6 +128,7 @@
 use_fp32_norm = False
 model = dict(
     checkpoint=False,
+    # checkpoint_tp_no_comm=True,  # whether use TP recomputation communication optimization
     num_chunks=1,
     num_attention_heads=NUM_ATTENTION_HEAD,
     embed_split_hidden=True,

configs/7B_sft.py

@@ -141,6 +141,7 @@
 use_fp32_norm = False
 model = dict(
     checkpoint=False,  # The proportion of layers for activation aheckpointing, the optional value are True/False/[0-1]
+    # checkpoint_tp_no_comm=True,  # whether use TP recomputation communication optimization
     num_attention_heads=NUM_ATTENTION_HEAD,
     embed_split_hidden=True,
     vocab_size=VOCAB_SIZE,

internlm/core/context/parallel_context.py

@@ -159,6 +159,7 @@ def __init__(self):
         self.virtual_pipeline_parallel_rank = None
         self._expert_parallel_group_names = []
         self.is_evaluating = False
+        self.recompute_forward_no_comm = False
 
     @property
     def config(self):

internlm/core/parallel/comm/tensor.py

@@ -66,7 +66,7 @@ def input_hook(
 
     @abstractmethod
     def grad_output_hook(
-        self, grad_output: torch.Tensor, async_op: bool = False
+        self, grad_output: torch.Tensor, async_op: bool = False, no_communication: bool = False
     ) -> Tuple[torch.Tensor, AsyncCommHandle]:
         """
         communication for grad_output when backward.
@@ -81,7 +81,9 @@ def grad_input_hook(self, grad_input: torch.Tensor, async_op: bool = False) -> T
         pass
 
     @abstractmethod
-    def output_hook(self, output: torch.Tensor, async_op: bool = False) -> Tuple[torch.Tensor, AsyncCommHandle]:
+    def output_hook(
+        self, output: torch.Tensor, async_op: bool = False, no_communication: bool = False
+    ) -> Tuple[torch.Tensor, AsyncCommHandle]:
         """
         communication for output when forward.
         """
@@ -116,7 +118,10 @@ def input_hook(
         return _input, DUMMY_HANDLE_CONST
 
     def grad_output_hook(
-        self, grad_output: torch.Tensor, async_op: bool = False  # pylint: disable=W0613
+        self,
+        grad_output: torch.Tensor,
+        async_op: bool = False,
+        no_communication: bool = False,  # pylint: disable=W0613
     ) -> Tuple[torch.Tensor, AsyncCommHandle]:
         """
         tensor parallel should do nothing for grad_output.
@@ -132,11 +137,13 @@ def grad_input_hook(self, grad_input: torch.Tensor, async_op: bool = False) -> T
 
         return all_reduce_raw(grad_input, process_group=self._process_group, async_op=async_op)
 
-    def output_hook(self, output: torch.Tensor, async_op: bool = False) -> Tuple[torch.Tensor, AsyncCommHandle]:
+    def output_hook(
+        self, output: torch.Tensor, async_op: bool = False, no_communication: bool = False
+    ) -> Tuple[torch.Tensor, AsyncCommHandle]:
         """
         all reduce output only for row parallel linear when forward.
         """
-        if dist.get_world_size(self._process_group) <= 1 or self._role == LinearRole.COLUMN:
+        if no_communication or dist.get_world_size(self._process_group) <= 1 or self._role == LinearRole.COLUMN:
             return output, DUMMY_HANDLE_CONST
 
         return all_reduce_raw(output, process_group=self._process_group, async_op=async_op)
@@ -182,12 +189,12 @@ def input_hook(
         return all_gather_raw(_input, process_group=self._process_group, async_op=async_op, gather_dim=_GATHER_DIM)
 
     def grad_output_hook(
-        self, grad_output: torch.Tensor, async_op: bool = False
+        self, grad_output: torch.Tensor, async_op: bool = False, no_communication: bool = False
     ) -> Tuple[torch.Tensor, AsyncCommHandle]:
         """
         all gather grad_output only for row parallel linear when backward.
         """
-        if dist.get_world_size(self._process_group) <= 1 or self._role == LinearRole.COLUMN:
+        if no_communication or dist.get_world_size(self._process_group) <= 1 or self._role == LinearRole.COLUMN:
             return grad_output, DUMMY_HANDLE_CONST
 
         return all_gather_raw(grad_output, process_group=self._process_group, async_op=async_op, gather_dim=_GATHER_DIM)
@@ -203,11 +210,13 @@ def grad_input_hook(self, grad_input: torch.Tensor, async_op: bool = False) -> T
             grad_input, process_group=self._process_group, async_op=async_op, reduce_dim=_REDUCE_DIM
         )
 
-    def output_hook(self, output: torch.Tensor, async_op: bool = False) -> Tuple[torch.Tensor, AsyncCommHandle]:
+    def output_hook(
+        self, output: torch.Tensor, async_op: bool = False, no_communication: bool = False
+    ) -> Tuple[torch.Tensor, AsyncCommHandle]:
         """
         reduce scatter output only for row parallel linear when forward.
         """
-        if dist.get_world_size(self._process_group) <= 1 or self._role == LinearRole.COLUMN:
+        if no_communication or dist.get_world_size(self._process_group) <= 1 or self._role == LinearRole.COLUMN:
             return output, DUMMY_HANDLE_CONST
 
         return reduce_scatter_raw(output, process_group=self._process_group, async_op=async_op, reduce_dim=_REDUCE_DIM)
@@ -225,7 +234,10 @@ def __init__(self, parallel_mode: ParallelMode, retain_out_sharded: bool = True)
         self._retain_out_sharded = retain_out_sharded
 
     def grad_output_hook(
-        self, grad_output: torch.Tensor, async_op: bool = False  # pylint: disable=W0613
+        self,
+        grad_output: torch.Tensor,
+        async_op: bool = False,
+        no_communication: bool = False,  # pylint: disable=W0613
     ) -> Tuple[torch.Tensor, AsyncCommHandle]:
         """
         split grad_output if retain_out_sharded is False.
@@ -236,7 +248,7 @@ def grad_output_hook(
         return _split(grad_output, parallel_mode=self._parallel_mode, dim=-1), DUMMY_HANDLE_CONST
 
     def output_hook(
-        self, output: torch.Tensor, async_op: bool = False  # pylint: disable=W0613
+        self, output: torch.Tensor, async_op: bool = False, no_communication: bool = False  # pylint: disable=W0613
     ) -> Tuple[torch.Tensor, AsyncCommHandle]:
         """
         all gather output for head layer if retain_out_sharded is False.
@@ -266,7 +278,10 @@ def __init__(
 
     # rewrite grad_output communication hook
     def grad_output_hook(
-        self, grad_output: torch.Tensor, async_op: bool = False  # pylint: disable=W0613
+        self,
+        grad_output: torch.Tensor,
+        async_op: bool = False,
+        no_communication: bool = False,  # pylint: disable=W0613
     ) -> Tuple[torch.Tensor, AsyncCommHandle]:
         """
         split grad_output if retain_out_sharded is False.
@@ -278,7 +293,7 @@ def grad_output_hook(
 
     # rewrite ouput communication hook
     def output_hook(
-        self, output: torch.Tensor, async_op: bool = False  # pylint: disable=W0613
+        self, output: torch.Tensor, async_op: bool = False, no_communication: bool = False  # pylint: disable=W0613
     ) -> Tuple[torch.Tensor, AsyncCommHandle]:
         """
         all gather output for head layer if retain_out_sharded is False.

internlm/initialize/launch.py

@@ -295,10 +295,13 @@ def args_sanity_check():
             ]
 
     if "checkpoint" in model:
+        if "checkpoint_tp_no_comm" not in model:
+            gpc.config.model._add_item("checkpoint_tp_no_comm", True)
         if model.checkpoint is True:
             model.checkpoint = 1
         elif model.checkpoint is False:
             model.checkpoint = 0
+            model.checkpoint_tp_no_comm = False
         else:
             assert (
                 model.checkpoint >= 0 and model.checkpoint <= 1
@@ -411,6 +414,12 @@ def args_sanity_check():
             gpc.config.parallel["pipeline"].get("interleaved_overlap", False) is True
         ), "only support interleaved pipeline scheduler with overlap"
 
+    # when not use tp or sp, checkpoint_tp_no_comm should always be False
+    if (gpc.config.parallel["tensor"]["mode"] == "isp" or gpc.config.parallel["tensor"]["size"] <= 1) and getattr(
+        gpc.config.model, "checkpoint_tp_no_comm", False
+    ):
+        gpc.config.model.checkpoint_tp_no_comm = False
+
     # monitoring default config
     monitor_default_config = {
         "alert_address": None,  # compatible with old alert config

internlm/model/builder.py

@@ -21,6 +21,9 @@ def create_model(model_type, *args, **kwargs) -> Union[nn.Module, List[nn.Module
     kwargs["checkpoint"] = float(kwargs.get("checkpoint", False))
     kwargs["device"] = get_current_device()
 
+    if "checkpoint_tp_no_comm" in kwargs:
+        kwargs.pop("checkpoint_tp_no_comm")
+
     model_buidler = model_initializer.get_module(module_name=model_type)
 
     if not gpc.is_using_parallel_mode(ParallelMode.PIPELINE):

internlm/model/modeling_internlm.py

@@ -21,9 +21,11 @@
     convert_attn_kwargs_to_args,
     internlm1_mha_pre_load_convert,
     internlm1_mha_save_convert,
+    padding_residual,
 )
 from internlm.solver.activation_checkpoint import activation_checkpoint
 from internlm.utils.logger import get_logger
+from internlm.utils.parallel import is_using_sequence_parallel
 
 logger = get_logger(__file__)
 
@@ -211,7 +213,13 @@ def _dropout_and_norm_ffn(_residual, _hidden_states):
         if self.residual_in_fp32:
             residual = residual.to(torch.float32)
 
-        hidden_states = self.mlp(hidden_states)
+        no_communication = gpc.recompute_forward_no_comm
+
+        hidden_states = self.mlp(hidden_states, no_communication=no_communication)
+
+        # pad residual
+        if no_communication and is_using_sequence_parallel():
+            residual = padding_residual(residual)
 
         return hidden_states + residual
 

internlm/model/modeling_internlm2.py

@@ -21,9 +21,11 @@
 from internlm.model.utils import (
     convert_attn_args_to_kwargs,
     convert_attn_kwargs_to_args,
+    padding_residual,
 )
 from internlm.solver.activation_checkpoint import activation_checkpoint
 from internlm.utils.logger import get_logger
+from internlm.utils.parallel import is_using_sequence_parallel
 
 logger = get_logger(__file__)
 
@@ -255,7 +257,14 @@ def _dropout_and_norm_ffn(_residual, _hidden_states):
 
                     if self.residual_in_fp32:
                         residual = residual.to(torch.float32)
-                hidden_states = self.feed_forward(hidden_states)
+
+                no_communication = gpc.recompute_forward_no_comm
+
+                hidden_states = self.feed_forward(hidden_states, no_communication=no_communication)
+
+                # pad residual
+                if no_communication and is_using_sequence_parallel():
+                    residual = padding_residual(residual)
 
             return hidden_states + residual
         else:

internlm/model/modules/linear.py

@@ -45,10 +45,12 @@ def forward(
         bias: Optional[torch.Tensor],
         communicator: TPCommunicator,
         return_residual=False,
+        no_communication=False,
     ):
         ctx.compute_weight_gradient = weight.requires_grad
         ctx.return_residual = return_residual
         ctx.communicator = communicator
+        ctx.no_communication = no_communication
 
         if torch.is_autocast_enabled():
             x = x.to(dtype=torch.get_autocast_gpu_dtype())
@@ -77,7 +79,7 @@ def forward(
 
         # parallel strategy-specific communication callback 2.
         # see more details in the communicator for different parallel strategies.
-        output, _ = communicator.output_hook(output, async_op=False)
+        output, _ = communicator.output_hook(output, async_op=False, no_communication=no_communication)
 
         saved_x = None if ctx.compute_weight_gradient is False else total_x if communicator.save_total_input() else x
         ctx.save_for_backward(saved_x, weight)
@@ -91,7 +93,9 @@ def backward(ctx, grad_output, *args):
 
         # parallel strategy-specific communication callback 3.
         # see more details in the communicator for different parallel strategies.
-        grad_output, _ = communicator.grad_output_hook(grad_output, async_op=False)
+        grad_output, _ = communicator.grad_output_hook(
+            grad_output, no_communication=ctx.no_communication, async_op=False
+        )
         grad_output = grad_output.contiguous()
 
         if ctx.return_residual:
@@ -264,6 +268,7 @@ def fused_dense_func(
     module: Optional[nn.Module] = None,
     bias: Optional[torch.Tensor] = None,
     return_residual: bool = False,
+    no_communication=False,
 ):
     if communicator.communication_mode() == "wp":
         return WPFusedDenseFunc.apply(
@@ -281,6 +286,7 @@ def fused_dense_func(
             bias,
             communicator,
             return_residual,
+            no_communication,
         )
 
 
@@ -343,16 +349,16 @@ def __init__(
         else:
             super().__init__(in_features, out_features, bias=bias, device=device, dtype=dtype)
 
-    def forward(self, input: torch.Tensor) -> torch.Tensor:  # pylint: disable=W0622
+    def forward(self, input: torch.Tensor, no_communication=False) -> torch.Tensor:  # pylint: disable=W0622
         _class_name = self.__class__.__name__
         assert self._communicator is not None, f"{_class_name} should register with a communicator first."
-
         return fused_dense_func(
             input,
             self.weight,
             communicator=self._communicator,
             module=self,
             bias=self.bias,
+            no_communication=no_communication,
         )
 
 
@@ -465,7 +471,7 @@ def __init__(
         self.first_eval_flag = True
         self.tmp_weight = None
 
-    def forward(self, input):  # pylint: disable=W0622
+    def forward(self, input, no_communication=False):  # pylint: disable=W0622
         _class_name = self.__class__.__name__
         assert self._communicator is not None, f"{_class_name} should register with a communicator first."
 
@@ -496,6 +502,7 @@ def forward(self, input):  # pylint: disable=W0622
             communicator=self._communicator,
             module=self,
             bias=self.bias,
+            no_communication=no_communication,
         )
 
 

internlm/model/modules/mlp.py

@@ -91,14 +91,14 @@ def __init__(
             self.w2 = new_linear("w2", hidden_features, out_features, bias, device=device, dtype=dtype)
             self.w3 = new_linear("w3", in_features, hidden_features, bias, device=device, dtype=dtype)
 
-    def forward(self, x):
+    def forward(self, x, no_communication=False):
         if not self.mlp_layer_fusion:
             w1_o = self.w1(x)
             w3_o = self.w3(x)
         else:
             fussed_out = self.fused_w1_w3(x)
             w1_o, w3_o = torch.split(fussed_out, fussed_out.shape[-1] // 2, dim=-1)
-        out = self.w2(Silu(w1_o, w3_o))
+        out = self.w2(Silu(w1_o, w3_o), no_communication=no_communication)
         return out
 
 

internlm/model/utils.py

@@ -1,5 +1,10 @@
 from typing import Any, Dict, List
 
+import torch
+
+from internlm.core.context import ParallelMode
+from internlm.core.context.parallel_context import global_context as gpc
+from internlm.core.parallel.comm.tensor import _GATHER_DIM
 from internlm.model.modules.mha import MHA
 
 
@@ -51,3 +56,25 @@ def convert_attn_args_to_kwargs(args, kwargs) -> Dict[str, Any]:
         kwargs["max_seqlen"] = args[3]
 
     return kwargs
+
+
+def padding_residual(residual):
+    requires_grad = residual.requires_grad
+    pad_before = gpc.get_local_rank(ParallelMode.TENSOR) * residual.shape[_GATHER_DIM]
+    pad_after = (
+        gpc.get_world_size(ParallelMode.TENSOR) - gpc.get_local_rank(ParallelMode.TENSOR) - 1
+    ) * residual.shape[_GATHER_DIM]
+
+    pad_before_tensor = torch.zeros(
+        (*residual.shape[:_GATHER_DIM], pad_before, *residual.shape[_GATHER_DIM + 1 :]),
+        dtype=residual.dtype,
+        device=residual.device,
+    )
+    pad_after_tensor = torch.zeros(
+        (*residual.shape[:_GATHER_DIM], pad_after, *residual.shape[_GATHER_DIM + 1 :]),
+        dtype=residual.dtype,
+        device=residual.device,
+    )
+    residual = torch.cat([pad_before_tensor, residual, pad_after_tensor], dim=1).requires_grad_(requires_grad)
+
+    return residual