diff --git a/paddle/fluid/framework/details/broadcast_op_handle.cc b/paddle/fluid/framework/details/broadcast_op_handle.cc
index e6edcbfd19752abbb8524c71766a710b03113759..05bab5334a5737a78b984d4f9644886b0d9ff5a7 100644
--- a/paddle/fluid/framework/details/broadcast_op_handle.cc
+++ b/paddle/fluid/framework/details/broadcast_op_handle.cc
@@ -34,40 +34,21 @@ BroadcastOpHandle::BroadcastOpHandle(const std::vector<Scope *> &local_scopes,
     : local_scopes_(local_scopes), places_(places) {}
 
 void BroadcastOpHandle::RunImpl() {
-  // the input may have dummy var.
-  std::vector<VarHandle *> in_var_handle;
-  for (auto *in : inputs_) {
-    auto *out_handle = dynamic_cast<VarHandle *>(in);
-    if (out_handle) {
-      in_var_handle.push_back(out_handle);
-    }
-  }
+  // the input and output may have dummy var.
+  std::vector<VarHandle *> in_var_handle = GetValidVarHandles(inputs_);
+  std::vector<VarHandle *> out_var_handles = GetValidVarHandles(outputs_);
+
   PADDLE_ENFORCE_EQ(in_var_handle.size(), 1,
                     "The number of input should be one.");
-
-  // the output may have dummy var.
-  std::vector<VarHandle *> out_var_handles;
-  for (auto *out : outputs_) {
-    auto *out_handle = dynamic_cast<VarHandle *>(out);
-    if (out_handle) {
-      out_var_handles.push_back(out_handle);
-    }
-  }
-
   PADDLE_ENFORCE_EQ(
       out_var_handles.size(), places_.size(),
       "The number of output should equal to the number of places.");
 
-  // Wait input done, this Wait is asynchronous operation
-  auto &in_place = in_var_handle[0]->place_;
-  if (in_var_handle[0]->generated_op_) {
-    for (auto *out : out_var_handles) {
-      auto &out_p = out->place_;
-      in_var_handle[0]->generated_op_->Wait(dev_ctxes_[out_p]);
-    }
-  }
+  // Wait input done, this Wait is asynchronous operationplatform::Place
+  // &in_place;
+  WaitEvents(out_var_handles, in_var_handle);
 
-  //
+  auto in_place = in_var_handle[0]->place_;
   auto in_scope_idx = in_var_handle[0]->scope_idx_;
   auto in_var =
       local_scopes_.at(in_scope_idx)->FindVar(in_var_handle[0]->name_);
@@ -107,6 +88,29 @@ void BroadcastOpHandle::RunImpl() {
   }
 }
 
+void BroadcastOpHandle::WaitEvents(
+    const std::vector<VarHandle *> &out_var_handles,
+    const std::vector<VarHandle *> &in_var_handle) {
+  if (in_var_handle[0]->generated_op_) {
+    for (auto *out : out_var_handles) {
+      auto &out_p = out->place_;
+      in_var_handle[0]->generated_op_->Wait(dev_ctxes_[out_p]);
+    }
+  }
+}
+
+std::vector<VarHandle *> BroadcastOpHandle::GetValidVarHandles(
+    const std::vector<VarHandleBase *> &inputs) {
+  std::vector<VarHandle *> in_var_handle;
+  for (auto *in : inputs) {
+    auto *out_handle = dynamic_cast<VarHandle *>(in);
+    if (out_handle) {
+      in_var_handle.push_back(out_handle);
+    }
+  }
+  return in_var_handle;
+}
+
 std::string BroadcastOpHandle::Name() const { return "broadcast"; }
 }  // namespace details
 }  // namespace framework
diff --git a/paddle/fluid/framework/details/broadcast_op_handle.h b/paddle/fluid/framework/details/broadcast_op_handle.h
index b3292422522b64a38a50f39f04e6f0d2e15492dd..e1311aceaf978bd266105c2ac27b137ab361c96c 100644
--- a/paddle/fluid/framework/details/broadcast_op_handle.h
+++ b/paddle/fluid/framework/details/broadcast_op_handle.h
@@ -41,6 +41,12 @@ struct BroadcastOpHandle : public OpHandleBase {
 
  protected:
   void RunImpl() override;
+
+  std::vector<VarHandle *> GetValidVarHandles(
+      const std::vector<VarHandleBase *> &inputs);
+
+  void WaitEvents(const std::vector<VarHandle *> &out_var_handles,
+                  const std::vector<VarHandle *> &in_var_handle);
 };
 
 }  // namespace details
diff --git a/paddle/fluid/framework/details/gather_op_handle.cc b/paddle/fluid/framework/details/gather_op_handle.cc
index ae2bc9899c69bbbff02698cb6e985c8053d44f9b..df55e4dad1fc563d6d8aa3669d6da2cb0e5f2f4b 100644
--- a/paddle/fluid/framework/details/gather_op_handle.cc
+++ b/paddle/fluid/framework/details/gather_op_handle.cc
@@ -23,26 +23,13 @@ GatherOpHandle::GatherOpHandle(const std::vector<Scope *> &local_scopes,
     : local_scopes_(local_scopes), places_(places) {}
 
 void GatherOpHandle::RunImpl() {
-  // the input may have dummy var.
-  std::vector<VarHandle *> in_var_handles;
-  for (auto *in : inputs_) {
-    auto *in_handle = dynamic_cast<VarHandle *>(in);
-    if (in_handle) {
-      in_var_handles.push_back(in_handle);
-    }
-  }
+  // the input and output may have dummy var.
+  std::vector<VarHandle *> in_var_handles = GetValidVarHandles(inputs_);
+  std::vector<VarHandle *> out_var_handles = GetValidVarHandles(outputs_);
+
   PADDLE_ENFORCE_EQ(
       in_var_handles.size(), places_.size(),
       "The number of output should equal to the number of places.");
-
-  // the output may have dummy var.
-  std::vector<VarHandle *> out_var_handles;
-  for (auto *out : outputs_) {
-    auto *out_handle = dynamic_cast<VarHandle *>(out);
-    if (out_handle) {
-      out_var_handles.push_back(out_handle);
-    }
-  }
   PADDLE_ENFORCE_EQ(out_var_handles.size(), 1,
                     "The number of output should be one.");
 
@@ -58,11 +45,7 @@ void GatherOpHandle::RunImpl() {
                     "The place of input and output should be the same.");
 
   // Wait input done, this Wait is asynchronous operation
-  for (auto *in : in_var_handles) {
-    if (in->generated_op_) {
-      in->generated_op_->Wait(dev_ctxes_[in->place_]);
-    }
-  }
+  WaitEvents(in_var_handles);
 
   std::vector<int64_t> out_rows;
   std::vector<Tensor> in_tensors;
@@ -111,7 +94,7 @@ void GatherOpHandle::RunImpl() {
 
   // copy
   auto dev_ctx = dev_ctxes_[out_place];
-  RunAndRecordEvent(out_place, [in_tensors, out_var, dev_ctx, out_place] {
+  RunAndRecordEvent(out_place, [in_tensors, out_tensor, dev_ctx, out_place] {
     int s = 0, e = 0;
     for (size_t j = 0; j < in_tensors.size(); ++j) {
       e += in_tensors[j].dims()[0];
@@ -123,6 +106,27 @@ void GatherOpHandle::RunImpl() {
   });
 }
 
+void GatherOpHandle::WaitEvents(
+    const std::vector<VarHandle *> &in_var_handles) {
+  for (auto *in : in_var_handles) {
+    if (in->generated_op_) {
+      in->generated_op_->Wait(dev_ctxes_[in->place_]);
+    }
+  }
+}
+
+std::vector<VarHandle *> GatherOpHandle::GetValidVarHandles(
+    const std::vector<VarHandleBase *> &inputs) {
+  std::vector<VarHandle *> in_var_handles;
+  for (auto *in : inputs) {
+    auto *in_handle = dynamic_cast<VarHandle *>(in);
+    if (in_handle) {
+      in_var_handles.push_back(in_handle);
+    }
+  }
+  return in_var_handles;
+}
+
 std::string GatherOpHandle::Name() const { return "gather"; }
 }  // namespace details
 }  // namespace framework
diff --git a/paddle/fluid/framework/details/gather_op_handle.h b/paddle/fluid/framework/details/gather_op_handle.h
index 6c0231f642c05e6b558b7e2518a15e08c816fe4b..b13dc4ceb3ea2c5598ed77c09210493c40a99290 100644
--- a/paddle/fluid/framework/details/gather_op_handle.h
+++ b/paddle/fluid/framework/details/gather_op_handle.h
@@ -41,6 +41,11 @@ struct GatherOpHandle : public OpHandleBase {
 
  protected:
   void RunImpl() override;
+
+  std::vector<VarHandle *> GetValidVarHandles(
+      const std::vector<VarHandleBase *> &);
+
+  void WaitEvents(const std::vector<VarHandle *> &in_var_handles);
 };
 
 }  // namespace details