fix distributed unit-tests

test=develop

paddle/fluid/framework/operator.cc

@@ -874,17 +874,23 @@ std::vector<KernelConfig>* OperatorWithKernel::GetKernelConfig(
   return kernel_configs;
 }
 
-void OperatorWithKernel::RunImpl(const Scope& scope,
-                                 const platform::Place& place) const {
+RuntimeContext* OperatorWithKernel::GetRuntimeContext(
+    const Scope& scope) const {
   if (!HasAttr(kEnableRuntimeContext)) {
-    runtime_ctx_.reset(new RuntimeContext(Inputs(), Outputs(), scope));
+    return new RuntimeContext(Inputs(), Outputs(), scope);
   } else {
     const Scope* cur_scope = &scope;
     if (!runtime_ctx_ || pre_scope_ != cur_scope) {
       runtime_ctx_.reset(new RuntimeContext(Inputs(), Outputs(), scope));
       pre_scope_ = cur_scope;
     }
+    return runtime_ctx_.get();
   }
+}
+
+void OperatorWithKernel::RunImpl(const Scope& scope,
+                                 const platform::Place& place) const {
+  auto runtime_ctx = GetRuntimeContext(scope);
   platform::DeviceContextPool& pool = platform::DeviceContextPool::Instance();
   auto* dev_ctx = pool.Get(place);
 
@@ -899,7 +905,7 @@ void OperatorWithKernel::RunImpl(const Scope& scope,
   OpKernelMap& kernels = kernels_iter->second;
 
   auto expected_kernel_key = this->GetExpectedKernelType(
-      ExecutionContext(*this, scope, *dev_ctx, *runtime_ctx_, nullptr));
+      ExecutionContext(*this, scope, *dev_ctx, *runtime_ctx, nullptr));
   VLOG(3) << "expected_kernel_key:" << expected_kernel_key;
 
   auto kernel_iter = kernels.find(expected_kernel_key);
@@ -923,8 +929,8 @@ void OperatorWithKernel::RunImpl(const Scope& scope,
 
   // do data transformScope &transfer_scope;
   std::vector<std::string> transfered_inplace_vars;
-  auto* transfer_scope = PrepareData(
-      scope, expected_kernel_key, &transfered_inplace_vars, runtime_ctx_.get());
+  auto* transfer_scope = PrepareData(scope, expected_kernel_key,
+                                     &transfered_inplace_vars, runtime_ctx);
 
   // exec scope is the scope that kernel actually executed on.
   const Scope& exec_scope =
@@ -935,13 +941,13 @@ void OperatorWithKernel::RunImpl(const Scope& scope,
   }
 
   if (!HasAttr(kAllKernelsMustComputeRuntimeShape)) {
-    RuntimeInferShapeContext infer_shape_ctx(*this, exec_scope, *runtime_ctx_);
+    RuntimeInferShapeContext infer_shape_ctx(*this, exec_scope, *runtime_ctx);
     this->InferShape(&infer_shape_ctx);
   }
   // TODO(panyx0718): ExecutionContext should only depend on RuntimeContext
   // not Scope. Imperative mode only pass inputs and get outputs.
   kernel_iter->second(ExecutionContext(*this, exec_scope, *dev_ctx,
-                                       *runtime_ctx_, kernel_configs));
+                                       *runtime_ctx, kernel_configs));
 
   if (!transfered_inplace_vars.empty()) {
     // there is inplace variable has been transfered.

paddle/fluid/framework/operator.h

@@ -464,6 +464,7 @@ class OperatorWithKernel : public OperatorBase {
   // same.
   proto::VarType::Type IndicateDataType(const ExecutionContext& ctx) const;
   void RunImpl(const Scope& scope, const platform::Place& place) const final;
+  RuntimeContext* GetRuntimeContext(const Scope& scope) const;
 
   /**
    * Transfer data from scope to a transfered scope. If there is no data need to