diff --git a/paddle/fluid/inference/analysis/analyzer.cc b/paddle/fluid/inference/analysis/analyzer.cc
index 9318f1089781b30468cf4d3c7151d0dd26e50a9c..e51d6cfeb931d50a9a573df29c916ebd3da403d1 100644
--- a/paddle/fluid/inference/analysis/analyzer.cc
+++ b/paddle/fluid/inference/analysis/analyzer.cc
@@ -24,7 +24,7 @@
 
 namespace paddle {
 
-DEFINE_bool(inference_analysis_enable_tensorrt_subgraph_engine, true,
+DEFINE_bool(inference_analysis_enable_tensorrt_subgraph_engine, false,
             "Enable subgraph to TensorRT engine for acceleration");
 
 DEFINE_string(inference_analysis_graphviz_log_root, "./",
@@ -44,7 +44,8 @@ class DfgPassManagerImpl final : public DfgPassManager {
     if (FLAGS_inference_analysis_enable_tensorrt_subgraph_engine) {
       auto trt_teller = [&](const Node* node) {
         std::unordered_set<std::string> teller_set(
-            {"elementwise_add", "mul", "conv2d", "pool2d", "relu", "softmax"});
+            {"elementwise_add", "mul", "conv2d", "pool2d", "relu", "softmax",
+             "depthwise_conv2d", "batch_norm", "concat"});
         if (!node->IsFunction()) return false;
 
         const auto* func = static_cast<const Function*>(node);
diff --git a/paddle/fluid/inference/analysis/data_flow_graph_to_fluid_pass.cc b/paddle/fluid/inference/analysis/data_flow_graph_to_fluid_pass.cc
index 18c32fa09199003f17183207828cdfe4e627ae1a..ce0639a6162da6347ed130ecb1586c9a2d4071d5 100644
--- a/paddle/fluid/inference/analysis/data_flow_graph_to_fluid_pass.cc
+++ b/paddle/fluid/inference/analysis/data_flow_graph_to_fluid_pass.cc
@@ -23,9 +23,6 @@
 namespace paddle {
 namespace inference {
 
-DEFINE_int32(tensorrt_max_batchsize, 3, "TensorRT maximum batch size");
-DEFINE_int32(tensorrt_workspace_size, 2048, "TensorRT workspace size");
-
 namespace analysis {
 
 using framework::proto::ProgramDesc;
@@ -52,7 +49,6 @@ bool DataFlowGraphToFluidPass::Initialize(Argument *argument) {
 bool DataFlowGraphToFluidPass::Finalize() { return true; }
 
 void DataFlowGraphToFluidPass::Run(DataFlowGraph *graph) {
-  FilterRedundantOutputOfSubGraph(graph);
   LOG(INFO) << "graph.inputs " << graph->inputs.size();
   for (auto &node : GraphTraits<DataFlowGraph>(graph).nodes_in_TS()) {
     if (node.deleted()) continue;
@@ -191,8 +187,6 @@ void CreateTrtEngineOp(Node *node, const DataFlowGraph &graph,
   // Set attrs
   SetAttr(desc.Proto(), "subgraph", block->SerializeAsString());
   SetAttr(desc.Proto(), "engine_uniq_key", "trt-" + std::to_string(counter++));
-  SetAttr(desc.Proto(), "max_batch", FLAGS_tensorrt_max_batchsize);
-  SetAttr(desc.Proto(), "max_workspace", FLAGS_tensorrt_workspace_size);
   SetAttr(desc.Proto(), "parameters", ExtractParameters(graph.nodes.nodes()));
   SetAttr(desc.Proto(), "output_name_mapping", output_mapping);
   node->SetPbMsg(desc.Proto()->SerializeAsString());
diff --git a/paddle/fluid/inference/analysis/data_flow_graph_to_fluid_pass.h b/paddle/fluid/inference/analysis/data_flow_graph_to_fluid_pass.h
index 59c47365aa6c8ad5886c4515850d264f69cc4670..0c9a8a0b7cae17bf2eaa714348ea1c9b5e43611b 100644
--- a/paddle/fluid/inference/analysis/data_flow_graph_to_fluid_pass.h
+++ b/paddle/fluid/inference/analysis/data_flow_graph_to_fluid_pass.h
@@ -27,9 +27,6 @@
 namespace paddle {
 namespace inference {
 
-DECLARE_int32(tensorrt_max_batchsize);
-DECLARE_int32(tensorrt_workspace_size);
-
 namespace analysis {
 class DataFlowGraphToFluidPass final : public DataFlowGraphPass {
  public:
diff --git a/paddle/fluid/inference/analysis/fluid_to_data_flow_graph_pass.cc b/paddle/fluid/inference/analysis/fluid_to_data_flow_graph_pass.cc
index 511631d3e067f14bc1230d9e4b4d92dbe604e1d4..16d82b5aa1acaf87d1cd78ad5b79faa65143ad7d 100644
--- a/paddle/fluid/inference/analysis/fluid_to_data_flow_graph_pass.cc
+++ b/paddle/fluid/inference/analysis/fluid_to_data_flow_graph_pass.cc
@@ -92,6 +92,7 @@ void FluidToDataFlowGraphPass::Run(DataFlowGraph *graph) {
         auto *in = graph->nodes.GetMutable(var2id.at(in_var.arguments(k)));
         in->outlinks.push_back(o);
         o->inlinks.push_back(in);
+        unique_written_vars.insert(in);
       }
     }
     for (int j = 0; j < op.outputs_size(); j++) {
@@ -112,7 +113,6 @@ void FluidToDataFlowGraphPass::Run(DataFlowGraph *graph) {
         }
         out->inlinks.push_back(o);
         o->outlinks.push_back(out);
-        unique_written_vars.insert(out);
       }
     }
   }
diff --git a/paddle/fluid/inference/analysis/subgraph_splitter.cc b/paddle/fluid/inference/analysis/subgraph_splitter.cc
index 80809d4c43ca08298bad25cf614dcb4117d3f99a..9146c0e45e77b5f120d3be622f74e3008bca2b6f 100644
--- a/paddle/fluid/inference/analysis/subgraph_splitter.cc
+++ b/paddle/fluid/inference/analysis/subgraph_splitter.cc
@@ -153,6 +153,7 @@ void SubGraphFuse::ReplaceNodesWithSubGraphs() {
       inlink_or_outlink_cleaner(o->inlinks);
     }
   }
+  FilterRedundantOutputOfSubGraph(graph_);
 }
 
 }  // namespace analysis
diff --git a/paddle/fluid/inference/api/api_tensorrt_subgraph_engine.cc b/paddle/fluid/inference/api/api_tensorrt_subgraph_engine.cc
index 45b5a7638b7dc6a54bbd905766fd5c284cb6aea1..5967402055c61dd480055497640a16ab7e94a746 100644
--- a/paddle/fluid/inference/api/api_tensorrt_subgraph_engine.cc
+++ b/paddle/fluid/inference/api/api_tensorrt_subgraph_engine.cc
@@ -15,6 +15,7 @@
 #include "paddle/fluid/inference/analysis/analyzer.h"
 #include "paddle/fluid/inference/api/api_impl.h"
 #include "paddle/fluid/inference/api/paddle_inference_api.h"
+#include "paddle/fluid/inference/tensorrt/convert/op_converter.h"
 #include "paddle/fluid/inference/utils/singleton.h"
 #include "paddle/fluid/operators/tensorrt_engine_op.h"
 
@@ -32,7 +33,9 @@ class TensorRTSubgraphPredictor : public NativePaddlePredictor {
 
   bool Init(const std::shared_ptr<framework::Scope>& parent_scope) {
     VLOG(3) << "Predictor::init()";
-
+    FLAGS_inference_analysis_enable_tensorrt_subgraph_engine = true;
+    FLAGS_tensorrt_max_batch_size = config_.max_batch_size;
+    FLAGS_tensorrt_workspace_size = config_.workspace_size;
     if (config_.use_gpu) {
       place_ = paddle::platform::CUDAPlace(config_.device);
     } else {
@@ -150,3 +153,13 @@ CreatePaddlePredictor<TensorRTConfig, PaddleEngineKind::kAutoMixedTensorRT>(
 }
 
 }  // namespace paddle
+
+USE_TRT_CONVERTER(elementwise_add_weight);
+USE_TRT_CONVERTER(mul);
+USE_TRT_CONVERTER(conv2d);
+USE_TRT_CONVERTER(relu);
+USE_TRT_CONVERTER(fc);
+USE_TRT_CONVERTER(pool2d);
+USE_TRT_CONVERTER(softmax);
+USE_TRT_CONVERTER(batch_norm);
+USE_TRT_CONVERTER(concat);
diff --git a/paddle/fluid/inference/api/api_tensorrt_subgraph_engine_tester.cc b/paddle/fluid/inference/api/api_tensorrt_subgraph_engine_tester.cc
index fcbf9b89d608e7961e3ef81ac1c70e083dae1cc0..b3892b5dd89fef055f87f9170a0e1f24cc93d0a0 100644
--- a/paddle/fluid/inference/api/api_tensorrt_subgraph_engine_tester.cc
+++ b/paddle/fluid/inference/api/api_tensorrt_subgraph_engine_tester.cc
@@ -37,6 +37,7 @@ void CompareTensorRTWithFluid(bool enable_tensorrt) {
   config1.use_gpu = true;
   config1.fraction_of_gpu_memory = 0.3;
   config1.device = 0;
+  config1.max_batch_size = 10;
 
   auto predictor0 =
       CreatePaddlePredictor<NativeConfig, PaddleEngineKind::kNative>(config0);
diff --git a/paddle/fluid/inference/api/paddle_inference_api.h b/paddle/fluid/inference/api/paddle_inference_api.h
index 794534467be066e91db2b4c204913ab2cf12dbfd..da6c2cfc21809aa08bba79880dc898bb056d16a0 100644
--- a/paddle/fluid/inference/api/paddle_inference_api.h
+++ b/paddle/fluid/inference/api/paddle_inference_api.h
@@ -137,6 +137,14 @@ struct AnakinConfig : public PaddlePredictor::Config {
 struct TensorRTConfig : public NativeConfig {
   // Determine whether a subgraph will be executed by TRT.
   int min_subgraph_size{1};
+  // While TensorRT allows an engine optimized for a given max batch size
+  // to run at any smaller size, the performance for those smaller
+  // sizes may not be as well-optimized. Therefore, Max batch is best
+  // equivalent to the runtime batch size.
+  int max_batch_size{1};
+  // For workspace_size, refer it from here:
+  // https://docs.nvidia.com/deeplearning/sdk/tensorrt-developer-guide/index.html#troubleshooting
+  int workspace_size{1 << 30};
 };
 
 // A factory to help create different predictors.
diff --git a/paddle/fluid/inference/tensorrt/convert/CMakeLists.txt b/paddle/fluid/inference/tensorrt/convert/CMakeLists.txt
index 6863b035d8cd9dfb21aed3947226a796778912a4..9d7be2d03cf7bb12afe7e52d9630f184d689dc25 100644
--- a/paddle/fluid/inference/tensorrt/convert/CMakeLists.txt
+++ b/paddle/fluid/inference/tensorrt/convert/CMakeLists.txt
@@ -1,7 +1,7 @@
 # Add TRT tests
 nv_library(tensorrt_converter
   SRCS mul_op.cc conv2d_op.cc fc_op.cc pool2d_op.cc elementwise_op.cc
-activation_op.cc softmax_op.cc
+batch_norm_op.cc activation_op.cc softmax_op.cc concat_op.cc
   DEPS tensorrt_engine operator scope framework_proto op_registry)
 
 nv_test(test_op_converter SRCS test_op_converter.cc DEPS
@@ -18,9 +18,12 @@ nv_test(test_trt_conv_op SRCS test_conv2d_op.cc conv2d_op.cc
         DEPS ${FLUID_CORE_MODULES} tensorrt_engine conv_op SERIAL)
 nv_test(test_trt_pool2d_op SRCS test_pool2d_op.cc pool2d_op.cc
         DEPS ${FLUID_CORE_MODULES} tensorrt_engine pool_op SERIAL)
-
 nv_test(test_trt_elementwise_op SRCS test_elementwise_op.cc elementwise_op.cc
         DEPS ${FLUID_CORE_MODULES} tensorrt_engine elementwise_add_op SERIAL)
-
 nv_test(test_trt_softmax_op SRCS test_softmax_op.cc softmax_op.cc
         DEPS ${FLUID_CORE_MODULES} tensorrt_engine softmax_op SERIAL)
+nv_test(test_trt_batch_norm_op SRCS test_batch_norm_op.cc batch_norm_op.cc
+        DEPS ${FLUID_CORE_MODULES} tensorrt_engine batch_norm_op SERIAL)
+
+nv_test(test_trt_concat_op SRCS test_concat_op.cc concat_op.cc
+        DEPS ${FLUID_CORE_MODULES} tensorrt_engine concat_op SERIAL)
diff --git a/paddle/fluid/inference/tensorrt/convert/batch_norm_op.cc b/paddle/fluid/inference/tensorrt/convert/batch_norm_op.cc
new file mode 100644
index 0000000000000000000000000000000000000000..94f8b0ae5606d39a722ffe28501645c9b6fc5d2e
--- /dev/null
+++ b/paddle/fluid/inference/tensorrt/convert/batch_norm_op.cc
@@ -0,0 +1,136 @@
+/* Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License. */
+
+#include <math.h>
+#include "paddle/fluid/inference/tensorrt/convert/op_converter.h"
+
+namespace paddle {
+namespace inference {
+namespace tensorrt {
+
+class BatchNormOpConverter : public OpConverter {
+ public:
+  void operator()(const framework::proto::OpDesc& op,
+                  const framework::Scope& scope, bool test_mode) override {
+    LOG(INFO) << "convert a fluid batch norm op to tensorrt batch_norm";
+
+    framework::OpDesc op_desc(op, nullptr);
+    PADDLE_ENFORCE_EQ(op_desc.Input("X").size(), 1);
+    PADDLE_ENFORCE_EQ(op_desc.Input("Bias").size(), 1);   // Bias is a weight
+    PADDLE_ENFORCE_EQ(op_desc.Input("Mean").size(), 1);   // Mean is a weight
+    PADDLE_ENFORCE_EQ(op_desc.Input("Scale").size(), 1);  // Scale is a weight
+    PADDLE_ENFORCE_EQ(op_desc.Input("Variance").size(),
+                      1);  // Variance is a weight
+    PADDLE_ENFORCE_EQ(op_desc.Output("Y").size(), 1);
+
+    auto* X = engine_->GetITensor(op_desc.Input("X").front());
+    // Declare weights
+    auto* Bias_v = scope.FindVar(op_desc.Input("Bias").front());
+    auto* Mean_v = scope.FindVar(op_desc.Input("Mean").front());
+    auto* Scale_v = scope.FindVar(op_desc.Input("Scale").front());
+    auto* Variance_v = scope.FindVar(op_desc.Input("Variance").front());
+    const float eps = boost::get<float>(op_desc.GetAttr("epsilon"));
+
+    PADDLE_ENFORCE_NOT_NULL(Bias_v);
+    PADDLE_ENFORCE_NOT_NULL(Mean_v);
+    PADDLE_ENFORCE_NOT_NULL(Scale_v);
+    PADDLE_ENFORCE_NOT_NULL(Variance_v);
+
+    // get tensor
+    auto* Bias_t = Bias_v->GetMutable<framework::LoDTensor>();
+    auto* Mean_t = Mean_v->GetMutable<framework::LoDTensor>();
+    auto* Scale_t = Scale_v->GetMutable<framework::LoDTensor>();
+    auto* Variance_t = Variance_v->GetMutable<framework::LoDTensor>();
+
+    // create temp tensor for weights
+    framework::LoDTensor bias_tensor;
+    framework::LoDTensor mean_tensor;
+    framework::LoDTensor scale_tensor;
+    framework::LoDTensor variance_tensor;
+
+    bias_tensor.Resize(Bias_t->dims());
+    mean_tensor.Resize(Mean_t->dims());
+    scale_tensor.Resize(Scale_t->dims());
+    variance_tensor.Resize(Variance_t->dims());
+
+    platform::CPUPlace cpu_place;
+    // copy data from gpu to cpu
+    TensorCopySync((*Bias_t), cpu_place, &bias_tensor);
+    TensorCopySync((*Mean_t), cpu_place, &mean_tensor);
+    TensorCopySync((*Scale_t), cpu_place, &scale_tensor);
+    TensorCopySync((*Variance_t), cpu_place, &variance_tensor);
+
+    auto* bias_data = bias_tensor.mutable_data<float>(platform::CPUPlace());
+    auto* mean_data = mean_tensor.mutable_data<float>(platform::CPUPlace());
+    auto* scale_data = scale_tensor.mutable_data<float>(platform::CPUPlace());
+    auto* variance_data =
+        variance_tensor.mutable_data<float>(platform::CPUPlace());
+
+    std::unique_ptr<framework::LoDTensor> combile_scale_tensor(
+        new framework::LoDTensor());
+    std::unique_ptr<framework::LoDTensor> combile_bias_tensor(
+        new framework::LoDTensor());
+
+    combile_scale_tensor->Resize(scale_tensor.dims());
+    combile_bias_tensor->Resize(bias_tensor.dims());
+
+    auto* combile_scale_data =
+        combile_scale_tensor->mutable_data<float>(platform::CPUPlace());
+    auto* combile_bias_data =
+        combile_bias_tensor->mutable_data<float>(platform::CPUPlace());
+
+    size_t ele_num = combile_scale_tensor->memory_size() / sizeof(float);
+
+    for (size_t i = 0; i < ele_num; i++) {
+      float scale = scale_data[i];
+      float bias = bias_data[i];
+      float mean = mean_data[i];
+      float variance = variance_data[i];
+      combile_scale_data[i] = scale / sqrtf(variance + eps);
+      combile_bias_data[i] = bias - mean * combile_scale_data[i];
+    }
+
+    TensorRTEngine::Weight scale_weights{
+        nvinfer1::DataType::kFLOAT, static_cast<void*>(combile_scale_data),
+        combile_scale_tensor->memory_size() / sizeof(float)};
+    TensorRTEngine::Weight shift_weights{
+        nvinfer1::DataType::kFLOAT, static_cast<void*>(combile_bias_data),
+        combile_bias_tensor->memory_size() / sizeof(float)};
+    TensorRTEngine::Weight power_weights{nvinfer1::DataType::kFLOAT, nullptr,
+                                         0};
+
+    nvinfer1::IScaleLayer* layer =
+        TRT_ENGINE_ADD_LAYER(engine_, Scale, *const_cast<nvinfer1::ITensor*>(X),
+                             nvinfer1::ScaleMode::kCHANNEL, shift_weights.get(),
+                             scale_weights.get(), power_weights.get());
+
+    auto output_name = op_desc.Output("Y").front();
+    engine_->weight_map[op_desc.Input("Bias").front()] =
+        std::move(combile_bias_tensor);
+    engine_->weight_map[op_desc.Input("Scale").front()] =
+        std::move(combile_scale_tensor);
+
+    engine_->SetITensor(output_name, layer->getOutput(0));
+
+    if (test_mode) {
+      engine_->DeclareOutput(output_name);
+    }
+  }
+};
+
+}  // namespace tensorrt
+}  // namespace inference
+}  // namespace paddle
+
+REGISTER_TRT_OP_CONVERTER(batch_norm, BatchNormOpConverter);
diff --git a/paddle/fluid/inference/tensorrt/convert/concat_op.cc b/paddle/fluid/inference/tensorrt/convert/concat_op.cc
new file mode 100644
index 0000000000000000000000000000000000000000..bb9627bf957b63993b2c8d23e7ec8122eb004eaf
--- /dev/null
+++ b/paddle/fluid/inference/tensorrt/convert/concat_op.cc
@@ -0,0 +1,57 @@
+/* Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License. */
+
+#include "paddle/fluid/inference/tensorrt/convert/op_converter.h"
+
+namespace paddle {
+namespace inference {
+namespace tensorrt {
+
+/*
+ * MulOp, IMatrixMultiplyLayer in TRT. This Layer doesn't has weights.
+ */
+class ConcatOpConverter : public OpConverter {
+ public:
+  void operator()(const framework::proto::OpDesc& op,
+                  const framework::Scope& scope, bool test_mode) override {
+    VLOG(4) << "convert a fluid mul op to tensorrt mul layer without bias";
+
+    framework::OpDesc op_desc(op, nullptr);
+    // Declare inputs
+    std::vector<nvinfer1::ITensor*> itensors;
+    for (auto& input_name : op_desc.Input("X")) {
+      itensors.push_back(engine_->GetITensor(input_name));
+    }
+    int axis = boost::get<int>(op_desc.GetAttr("axis"));
+    PADDLE_ENFORCE(axis > 0,
+                   "The axis attr of Concat op should be large than 0 for trt");
+
+    auto* layer = TRT_ENGINE_ADD_LAYER(engine_, Concatenation, itensors.data(),
+                                       itensors.size());
+    axis = axis - 1;  // Remove batch dim
+    layer->setAxis(axis);
+    auto output_name = op_desc.Output("Out")[0];
+    engine_->SetITensor(output_name, layer->getOutput(0));
+    if (test_mode) {  // the test framework can not determine which is the
+                      // output, so place the declaration inside.
+      engine_->DeclareOutput(output_name);
+    }
+  }
+};
+
+}  // namespace tensorrt
+}  // namespace inference
+}  // namespace paddle
+
+REGISTER_TRT_OP_CONVERTER(concat, ConcatOpConverter);
diff --git a/paddle/fluid/inference/tensorrt/convert/conv2d_op.cc b/paddle/fluid/inference/tensorrt/convert/conv2d_op.cc
index dba1d50b2d1c487ced8e6ca51f2d257641ad5fc7..841a95db38ce7cf0cb5961ff04cb569ee2633e6f 100644
--- a/paddle/fluid/inference/tensorrt/convert/conv2d_op.cc
+++ b/paddle/fluid/inference/tensorrt/convert/conv2d_op.cc
@@ -35,12 +35,20 @@ class Conv2dOpConverter : public OpConverter {
     auto* Y_v = scope.FindVar(op_desc.Input("Filter").front());
     PADDLE_ENFORCE_NOT_NULL(Y_v);
     auto* Y_t = Y_v->GetMutable<framework::LoDTensor>();
-    auto* weight_data = Y_t->mutable_data<float>(platform::CPUPlace());
 
-    PADDLE_ENFORCE_EQ(Y_t->dims().size(), 4UL);
-    const int n_output = Y_t->dims()[0];
-    const int filter_h = Y_t->dims()[2];
-    const int filter_w = Y_t->dims()[3];
+    platform::CPUPlace cpu_place;
+    std::unique_ptr<framework::LoDTensor> weight_tensor(
+        new framework::LoDTensor());
+    weight_tensor->Resize(Y_t->dims());
+    TensorCopySync((*Y_t), cpu_place, weight_tensor.get());
+
+    auto* weight_data =
+        weight_tensor->mutable_data<float>(platform::CPUPlace());
+
+    PADDLE_ENFORCE_EQ(weight_tensor->dims().size(), 4UL);
+    const int n_output = weight_tensor->dims()[0];
+    const int filter_h = weight_tensor->dims()[2];
+    const int filter_w = weight_tensor->dims()[3];
 
     const int groups = boost::get<int>(op_desc.GetAttr("groups"));
     const std::vector<int> dilations =
@@ -57,7 +65,7 @@ class Conv2dOpConverter : public OpConverter {
 
     TensorRTEngine::Weight weight{nvinfer1::DataType::kFLOAT,
                                   static_cast<void*>(weight_data),
-                                  Y_t->memory_size() / sizeof(float)};
+                                  weight_tensor->memory_size() / sizeof(float)};
 
     TensorRTEngine::Weight bias{nvinfer1::DataType::kFLOAT, nullptr, 0};
     auto* layer = TRT_ENGINE_ADD_LAYER(
@@ -70,6 +78,8 @@ class Conv2dOpConverter : public OpConverter {
     layer->setNbGroups(groups);
 
     auto output_name = op_desc.Output("Output").front();
+    engine_->weight_map[op_desc.Input("Filter").front()] =
+        std::move(weight_tensor);
     engine_->SetITensor(output_name, layer->getOutput(0));
     if (test_mode) {
       engine_->DeclareOutput(output_name);
diff --git a/paddle/fluid/inference/tensorrt/convert/elementwise_op.cc b/paddle/fluid/inference/tensorrt/convert/elementwise_op.cc
index 3744550f60a1696aedd8a3ecd24f1b21d22325b9..60a72b4eb5c75b5cd12305f13763a9a1a567213f 100644
--- a/paddle/fluid/inference/tensorrt/convert/elementwise_op.cc
+++ b/paddle/fluid/inference/tensorrt/convert/elementwise_op.cc
@@ -12,7 +12,6 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License. */
 
-#include "paddle/fluid/framework/op_registry.h"
 #include "paddle/fluid/inference/tensorrt/convert/op_converter.h"
 
 namespace paddle {
@@ -40,10 +39,17 @@ class ElementwiseWeightOpConverter : public OpConverter {
     auto* Y_v = scope.FindVar(op_desc.Input("Y").front());
     PADDLE_ENFORCE_NOT_NULL(Y_v);
     auto* Y_t = Y_v->GetMutable<framework::LoDTensor>();
-    auto* weight_data = Y_t->mutable_data<float>(platform::CPUPlace());
+
+    platform::CPUPlace cpu_place;
+    std::unique_ptr<framework::LoDTensor> weight_tensor(
+        new framework::LoDTensor());
+    weight_tensor->Resize(Y_t->dims());
+    TensorCopySync((*Y_t), cpu_place, weight_tensor.get());
+    auto* weight_data =
+        weight_tensor->mutable_data<float>(platform::CPUPlace());
     auto scale_mode = nvinfer1::ScaleMode::kELEMENTWISE;
 
-    std::vector<int> dims_y = framework::vectorize2int(Y_t->dims());
+    std::vector<int> dims_y = framework::vectorize2int(weight_tensor->dims());
     if (static_cast<int>(dims_y.size()) == dims_x.nbDims + 1) {
       if (dims_y[0] == 1) dims_y.erase(dims_y.begin());
     }
@@ -70,9 +76,9 @@ class ElementwiseWeightOpConverter : public OpConverter {
       PADDLE_THROW("TensorRT unsupported weight Shape for Elementwise op!");
     }
 
-    TensorRTEngine::Weight shift_weights{nvinfer1::DataType::kFLOAT,
-                                         static_cast<void*>(weight_data),
-                                         Y_t->memory_size() / sizeof(float)};
+    TensorRTEngine::Weight shift_weights{
+        nvinfer1::DataType::kFLOAT, static_cast<void*>(weight_data),
+        weight_tensor->memory_size() / sizeof(float)};
     TensorRTEngine::Weight scale_weights{nvinfer1::DataType::kFLOAT, nullptr,
                                          0};
     TensorRTEngine::Weight power_weights{nvinfer1::DataType::kFLOAT, nullptr,
@@ -82,6 +88,8 @@ class ElementwiseWeightOpConverter : public OpConverter {
         engine_, Scale, *const_cast<nvinfer1::ITensor*>(X), scale_mode,
         shift_weights.get(), scale_weights.get(), power_weights.get());
     auto output_name = op_desc.Output("Out")[0];
+
+    engine_->weight_map[op_desc.Input("Y").front()] = std::move(weight_tensor);
     engine_->SetITensor(output_name, layer->getOutput(0));
     if (test_mode) {  // the test framework can not determine which is the
                       // output, so place the declaration inside.
diff --git a/paddle/fluid/inference/tensorrt/convert/fc_op.cc b/paddle/fluid/inference/tensorrt/convert/fc_op.cc
index 39fe1f609d7b94638506877fc301f19ef33ec8ac..ad98d85aae9cf594922aca00c43718ccfbce2278 100644
--- a/paddle/fluid/inference/tensorrt/convert/fc_op.cc
+++ b/paddle/fluid/inference/tensorrt/convert/fc_op.cc
@@ -12,12 +12,7 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License. */
 
-#include "paddle/fluid/framework/eigen.h"
-#include "paddle/fluid/framework/lod_tensor.h"
-#include "paddle/fluid/framework/op_registry.h"
 #include "paddle/fluid/inference/tensorrt/convert/op_converter.h"
-#include "paddle/fluid/inference/tensorrt/engine.h"
-#include "paddle/fluid/platform/place.h"
 
 namespace paddle {
 namespace inference {
@@ -73,19 +68,26 @@ class FcOpConverter : public OpConverter {
     auto* Y_t = Y_v->GetMutable<framework::LoDTensor>();
     // This may trigger a GPU->CPU copy, because TRT's weight can only be
     // assigned from CPU memory, that can't be avoided.
-    auto* weight_data = Y_t->mutable_data<float>(platform::CPUPlace());
-    PADDLE_ENFORCE_EQ(Y_t->dims().size(), 2UL);  // a matrix
-    size_t n_output = Y_t->dims()[1];
+    platform::CPUPlace cpu_place;
+    framework::LoDTensor weight_tensor;
+    weight_tensor.Resize(Y_t->dims());
+    TensorCopySync((*Y_t), cpu_place, &weight_tensor);
 
-    framework::LoDTensor tmp;
-    tmp.Resize(Y_t->dims());
-    memcpy(tmp.mutable_data<float>(platform::CPUPlace()), weight_data,
+    auto* weight_data = weight_tensor.mutable_data<float>(platform::CPUPlace());
+
+    PADDLE_ENFORCE_EQ(weight_tensor.dims().size(), 2UL);  // a matrix
+    size_t n_output = weight_tensor.dims()[1];
+
+    std::unique_ptr<framework::Tensor> tmp(new framework::LoDTensor());
+    tmp->Resize(weight_tensor.dims());
+
+    memcpy(tmp->mutable_data<float>(platform::CPUPlace()), weight_data,
            Y_t->dims()[0] * Y_t->dims()[1] * sizeof(float));
     TensorRTEngine::Weight weight{nvinfer1::DataType::kFLOAT,
                                   static_cast<void*>(weight_data),
                                   Y_t->memory_size() / sizeof(float)};
     TensorRTEngine::Weight tmp_weight(nvinfer1::DataType::kFLOAT,
-                                      static_cast<void*>(tmp.data<float>()),
+                                      static_cast<void*>(tmp->data<float>()),
                                       Y_t->memory_size() / sizeof(float));
     weight.dims.assign({Y_t->dims()[0], Y_t->dims()[1]});
     tmp_weight.dims = weight.dims;
@@ -106,6 +108,7 @@ class FcOpConverter : public OpConverter {
 
     auto output_name = op_desc.Output("Out").front();
     engine_->SetITensor(output_name, layer->getOutput(0));
+    engine_->weight_map[op_desc.Input("Y").front()] = std::move(tmp);
     if (test_mode) {
       engine_->DeclareOutput(output_name);
     }
diff --git a/paddle/fluid/inference/tensorrt/convert/op_converter.h b/paddle/fluid/inference/tensorrt/convert/op_converter.h
index 41faaf7212accaaec238062b1340e8da8fa6be33..d309d94c560f2b484fac6b6cd40cc2704d641069 100644
--- a/paddle/fluid/inference/tensorrt/convert/op_converter.h
+++ b/paddle/fluid/inference/tensorrt/convert/op_converter.h
@@ -79,6 +79,14 @@ class OpConverter {
         it =
             Registry<OpConverter>::Lookup("elementwise_" + op_type + "_tensor");
       }
+      PADDLE_ENFORCE_NOT_NULL(it, "no OpConverter for optype [%s]",
+                              op_desc.Type());
+    }
+
+    if (op_desc.Type() == "depthwise_conv2d") {
+      it = Registry<OpConverter>::Lookup("conv2d");
+      PADDLE_ENFORCE_NOT_NULL(it, "no OpConverter for optype [%s]",
+                              op_desc.Type());
     }
 
     if (!it) {
diff --git a/paddle/fluid/inference/tensorrt/convert/pool2d_op.cc b/paddle/fluid/inference/tensorrt/convert/pool2d_op.cc
index 11cad95361867476c6f775af778015da37f1cfb1..73f1b28ddf73403862e55d102a259d7b6cf67b1f 100644
--- a/paddle/fluid/inference/tensorrt/convert/pool2d_op.cc
+++ b/paddle/fluid/inference/tensorrt/convert/pool2d_op.cc
@@ -33,6 +33,7 @@ class Pool2dOpConverter : public OpConverter {
     PADDLE_ENFORCE_EQ(op_desc.Output("Out").size(), 1);
     auto* input1 = engine_->GetITensor(op_desc.Input("X")[0]);
 
+    bool global_pooling = boost::get<bool>(op_desc.GetAttr("global_pooling"));
     std::string pool_type =
         boost::get<std::string>(op_desc.GetAttr("pooling_type"));
     std::vector<int> ksize =
@@ -42,7 +43,13 @@ class Pool2dOpConverter : public OpConverter {
     std::vector<int> paddings =
         boost::get<std::vector<int>>(op_desc.GetAttr("paddings"));
 
-    const nvinfer1::DimsHW nv_ksize(ksize[0], ksize[1]);
+    nvinfer1::DimsHW nv_ksize(ksize[0], ksize[1]);
+    if (global_pooling == true) {
+      nvinfer1::Dims input_shape = input1->getDimensions();
+      int nbDims = input_shape.nbDims;
+      nv_ksize.d[0] = input_shape.d[nbDims - 2];
+      nv_ksize.d[1] = input_shape.d[nbDims - 1];
+    }
     const nvinfer1::DimsHW nv_strides(strides[0], strides[1]);
     const nvinfer1::DimsHW nv_paddings(paddings[0], paddings[1]);
 
diff --git a/paddle/fluid/inference/tensorrt/convert/test_batch_norm_op.cc b/paddle/fluid/inference/tensorrt/convert/test_batch_norm_op.cc
new file mode 100644
index 0000000000000000000000000000000000000000..41412cb079540da72760558379b158b6538aa6a8
--- /dev/null
+++ b/paddle/fluid/inference/tensorrt/convert/test_batch_norm_op.cc
@@ -0,0 +1,71 @@
+/* Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License. */
+
+#include <gtest/gtest.h>
+#include "paddle/fluid/inference/tensorrt/convert/op_converter.h"
+#include "paddle/fluid/inference/tensorrt/convert/ut_helper.h"
+
+namespace paddle {
+namespace inference {
+namespace tensorrt {
+
+TEST(batch_norm_op, test) {
+  std::unordered_set<std::string> parameters(
+      {"batch_norm_scale", "batch_norm_bias", "batch_norm_mean",
+       "batch_norm_variance"});
+  framework::Scope scope;
+  TRTConvertValidation validator(5, parameters, scope, 1 << 15);
+  std::vector<int> param_shape{2};
+
+  validator.DeclInputVar("batch_norm_X", nvinfer1::DimsCHW(2, 5, 5));
+  validator.DeclParamVar("batch_norm_scale", param_shape);
+  validator.DeclParamVar("batch_norm_bias", param_shape);
+  validator.DeclParamVar("batch_norm_mean", param_shape);
+  validator.DeclParamVar("batch_norm_variance", param_shape);
+  validator.DeclOutputVar("batch_norm_Y", nvinfer1::DimsCHW(2, 5, 5));
+  validator.DeclOutputVar("batch_norm_save_mean", param_shape);
+  validator.DeclOutputVar("batch_norm_save_variance", param_shape);
+
+  // Prepare Op description
+  framework::OpDesc desc;
+
+  desc.SetType("batch_norm");
+  desc.SetInput("X", {"batch_norm_X"});
+  desc.SetInput("Scale", {"batch_norm_scale"});
+  desc.SetInput("Bias", {"batch_norm_bias"});
+  desc.SetInput("Mean", {"batch_norm_mean"});
+  desc.SetInput("Variance", {"batch_norm_variance"});
+  desc.SetOutput("Y", {"batch_norm_Y"});
+  desc.SetOutput("MeanOut", {"batch_norm_mean"});
+  desc.SetOutput("VarianceOut", {"batch_norm_variance"});
+  desc.SetOutput("SavedMean", {"batch_norm_save_mean"});
+  desc.SetOutput("SavedVariance", {"batch_norm_save_variance"});
+
+  float eps = 1e-5f;
+  bool is_test = true;
+  desc.SetAttr("epsilon", eps);
+  desc.SetAttr("is_test", is_test);
+
+  validator.SetOp(*desc.Proto());
+
+  std::unordered_set<std::string> neglected_output = {
+      "batch_norm_save_mean", "batch_norm_save_variance", "batch_norm_mean",
+      "batch_norm_variance"};
+  validator.Execute(3, neglected_output);
+}
+
+}  // namespace tensorrt
+}  // namespace inference
+}  // namespace paddle
+USE_OP(batch_norm);
diff --git a/paddle/fluid/inference/tensorrt/convert/test_concat_op.cc b/paddle/fluid/inference/tensorrt/convert/test_concat_op.cc
new file mode 100644
index 0000000000000000000000000000000000000000..4f284a4db5758e072915d7fd0f16115b8a36ba8b
--- /dev/null
+++ b/paddle/fluid/inference/tensorrt/convert/test_concat_op.cc
@@ -0,0 +1,49 @@
+/* Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License. */
+
+#include <gtest/gtest.h>
+#include "paddle/fluid/inference/tensorrt/convert/op_converter.h"
+#include "paddle/fluid/inference/tensorrt/convert/ut_helper.h"
+
+namespace paddle {
+namespace inference {
+namespace tensorrt {
+
+TEST(concat_op, test) {
+  std::unordered_set<std::string> parameters({""});
+  framework::Scope scope;
+  TRTConvertValidation validator(10, parameters, scope, 1000);
+  validator.DeclInputVar("concat_x1", nvinfer1::DimsCHW(10, 3, 1));
+  validator.DeclInputVar("concat_x2", nvinfer1::DimsCHW(3, 3, 1));
+  validator.DeclInputVar("concat_x3", nvinfer1::DimsCHW(7, 3, 1));
+  validator.DeclOutputVar("concat_out", nvinfer1::DimsCHW(20, 3, 1));
+
+  // Prepare Op description
+  framework::OpDesc desc;
+  desc.SetType("concat");
+  desc.SetInput("X", {"concat_x1", "concat_x2", "concat_x3"});
+  desc.SetOutput("Out", {"concat_out"});
+
+  int axis = 1;
+  desc.SetAttr("axis", axis);
+
+  validator.SetOp(*desc.Proto());
+
+  validator.Execute(5);
+}
+
+}  // namespace tensorrt
+}  // namespace inference
+}  // namespace paddle
+USE_OP(concat);
diff --git a/paddle/fluid/inference/tensorrt/convert/test_op_converter.cc b/paddle/fluid/inference/tensorrt/convert/test_op_converter.cc
index d6651a5b244ba31a01220e6299cb2016ae61fe64..01d7f700da9cc67d0ebbd3d9649e3823f58a8811 100644
--- a/paddle/fluid/inference/tensorrt/convert/test_op_converter.cc
+++ b/paddle/fluid/inference/tensorrt/convert/test_op_converter.cc
@@ -57,6 +57,7 @@ TEST(OpConverter, ConvertBlock) {
   auto* x = scope.Var("conv2d-Y");
   auto* x_tensor = x->GetMutable<framework::LoDTensor>();
   x_tensor->Resize(framework::make_ddim(dim_vec));
+  x_tensor->mutable_data<float>(platform::CUDAPlace(0));
 
   OpConverter converter;
   converter.ConvertBlock(*block->Proto(), {"conv2d-Y"}, scope,
diff --git a/paddle/fluid/inference/tensorrt/convert/test_pool2d_op.cc b/paddle/fluid/inference/tensorrt/convert/test_pool2d_op.cc
index c5dddbc8cd37b9fb1ba39382af2da5ad045f3af2..aedd6b62df040eeee4e48f628128511cd8bf4439 100644
--- a/paddle/fluid/inference/tensorrt/convert/test_pool2d_op.cc
+++ b/paddle/fluid/inference/tensorrt/convert/test_pool2d_op.cc
@@ -20,7 +20,7 @@ namespace paddle {
 namespace inference {
 namespace tensorrt {
 
-TEST(Pool2dOpConverter, main) {
+void test_pool2d(bool global_pooling) {
   framework::Scope scope;
   std::unordered_set<std::string> parameters;
   TRTConvertValidation validator(5, parameters, scope, 1 << 15);
@@ -28,7 +28,10 @@ TEST(Pool2dOpConverter, main) {
   // The ITensor's Dims should not contain the batch size.
   // So, the ITensor's Dims of input and output should be C * H * W.
   validator.DeclInputVar("pool2d-X", nvinfer1::Dims3(3, 4, 4));
-  validator.DeclOutputVar("pool2d-Out", nvinfer1::Dims3(3, 2, 2));
+  if (global_pooling)
+    validator.DeclOutputVar("pool2d-Out", nvinfer1::Dims3(3, 1, 1));
+  else
+    validator.DeclOutputVar("pool2d-Out", nvinfer1::Dims3(3, 2, 2));
 
   // Prepare Op description
   framework::OpDesc desc;
@@ -45,6 +48,7 @@ TEST(Pool2dOpConverter, main) {
   desc.SetAttr("ksize", ksize);
   desc.SetAttr("strides", strides);
   desc.SetAttr("paddings", paddings);
+  desc.SetAttr("global_pooling", global_pooling);
 
   LOG(INFO) << "set OP";
   validator.SetOp(*desc.Proto());
@@ -53,6 +57,10 @@ TEST(Pool2dOpConverter, main) {
   validator.Execute(3);
 }
 
+TEST(Pool2dOpConverter, normal) { test_pool2d(false); }
+
+TEST(Pool2dOpConverter, test_global_pooling) { test_pool2d(true); }
+
 }  // namespace tensorrt
 }  // namespace inference
 }  // namespace paddle
diff --git a/paddle/fluid/inference/tensorrt/convert/ut_helper.h b/paddle/fluid/inference/tensorrt/convert/ut_helper.h
index 4265f33f28fe36b1745baf4761c3c85e3a281d6b..0a6f171fc40a838fd81d6a51aca0430d5526f188 100644
--- a/paddle/fluid/inference/tensorrt/convert/ut_helper.h
+++ b/paddle/fluid/inference/tensorrt/convert/ut_helper.h
@@ -24,6 +24,7 @@ limitations under the License. */
 
 #include "paddle/fluid/framework/lod_tensor.h"
 #include "paddle/fluid/framework/op_registry.h"
+#include "paddle/fluid/framework/tensor_util.h"
 #include "paddle/fluid/inference/analysis/helper.h"
 #include "paddle/fluid/inference/tensorrt/convert/op_converter.h"
 #include "paddle/fluid/inference/tensorrt/engine.h"
@@ -48,11 +49,17 @@ void RandomizeTensor(framework::LoDTensor* tensor, const platform::Place& place,
   auto dims = tensor->dims();
   size_t num_elements = analysis::AccuDims(dims, dims.size());
   PADDLE_ENFORCE_GT(num_elements, 0);
-  auto* data = tensor->mutable_data<float>(place);
+
+  platform::CPUPlace cpu_place;
+  framework::LoDTensor temp_tensor;
+  temp_tensor.Resize(dims);
+  auto* temp_data = temp_tensor.mutable_data<float>(cpu_place);
 
   for (size_t i = 0; i < num_elements; i++) {
-    *(data + i) = random(0., 1.);
+    *(temp_data + i) = random(0., 1.);
   }
+
+  TensorCopySync(temp_tensor, place, tensor);
 }
 
 /*
@@ -91,18 +98,26 @@ class TRTConvertValidation {
     engine_->DeclareInput(name, nvinfer1::DataType::kFLOAT, dims);
   }
 
+  void DeclParamVar(const std::string& name, const std::vector<int> dim_vec) {
+    DeclVar(name, dim_vec);
+  }
+
   // Declare a parameter varaible in the scope.
   void DeclParamVar(const std::string& name, const nvinfer1::Dims& dims) {
     DeclVar(name, dims, true);
   }
 
+  void DeclOutputVar(const std::string& name, const std::vector<int> dim_vec) {
+    DeclVar(name, dim_vec);
+  }
+
   void DeclOutputVar(const std::string& name, const nvinfer1::Dims& dims) {
     DeclVar(name, dims);
   }
 
   void DeclVar(const std::string& name, const std::vector<int> dim_vec) {
-    platform::CPUPlace place;
-    platform::CPUDeviceContext ctx(place);
+    platform::CUDAPlace place;
+    platform::CUDADeviceContext ctx(place);
 
     auto* x = scope_.Var(name);
     auto* x_tensor = x->GetMutable<framework::LoDTensor>();
@@ -141,18 +156,22 @@ class TRTConvertValidation {
       PADDLE_ENFORCE(var);
       auto tensor = var->GetMutable<framework::LoDTensor>();
 
-      engine_->SetInputFromCPU(
+      engine_->SetInputFromGPU(
           input, static_cast<void*>(tensor->data<void>()),
           sizeof(float) *
               analysis::AccuDims(tensor->dims(), tensor->dims().size()));
     }
   }
 
-  void Execute(int batch_size) {
+  // We use the set 'neglected_output' here, because some Ops like batch norm,
+  // the outputs specified in the op des are only used during training,
+  // so we should neglect those output during inference.
+  void Execute(int batch_size,
+               std::unordered_set<std::string> neglected_output = {}) {
     // Execute Fluid Op
     PADDLE_ENFORCE_LE(batch_size, max_batch_size_);
-    platform::CPUPlace place;
-    platform::CPUDeviceContext ctx(place);
+    platform::CUDAPlace place;
+    platform::CUDADeviceContext ctx(place);
     op_->Run(scope_, place);
     // Execute TRT.
     engine_->Execute(batch_size);
@@ -161,6 +180,7 @@ class TRTConvertValidation {
     ASSERT_FALSE(op_desc_->OutputArgumentNames().empty());
     const size_t output_space_size = 3000;
     for (const auto& output : op_desc_->OutputArgumentNames()) {
+      if (neglected_output.count(output)) continue;
       std::vector<float> fluid_out;
       std::vector<float> trt_out(output_space_size);
       engine_->GetOutputInCPU(output, &trt_out[0], output_space_size);
diff --git a/paddle/fluid/inference/tensorrt/engine.cc b/paddle/fluid/inference/tensorrt/engine.cc
index b821c3d0bf425c46fae634fbf53f7ee63100ca5c..14e9e14d33d637ee68e37593cc48721e5169499f 100644
--- a/paddle/fluid/inference/tensorrt/engine.cc
+++ b/paddle/fluid/inference/tensorrt/engine.cc
@@ -33,6 +33,7 @@ void TensorRTEngine::Build(const DescType &paddle_model) {
 }
 
 void TensorRTEngine::Execute(int batch_size) {
+  freshDeviceId();
   batch_size_ = batch_size;
   std::vector<void *> buffers;
   for (auto &buf : buffers_) {
@@ -60,6 +61,7 @@ TensorRTEngine::~TensorRTEngine() {
 }
 
 void TensorRTEngine::FreezeNetwork() {
+  freshDeviceId();
   PADDLE_ENFORCE(infer_builder_ != nullptr,
                  "Call InitNetwork first to initialize network.");
   PADDLE_ENFORCE(infer_network_ != nullptr,
@@ -241,6 +243,13 @@ void TensorRTEngine::SetRuntimeBatch(size_t batch_size) {
 
 int TensorRTEngine::GetRuntimeBatch() { return runtime_batch_; }
 
+void TensorRTEngine::freshDeviceId() {
+  int count;
+  cudaGetDeviceCount(&count);
+  PADDLE_ENFORCE_LT(device_, count);
+  cudaSetDevice(device_);
+}
+
 }  // namespace tensorrt
 }  // namespace inference
 }  // namespace paddle
diff --git a/paddle/fluid/inference/tensorrt/engine.h b/paddle/fluid/inference/tensorrt/engine.h
index 694468c419c20089de1cdecff1a903ad0cc6e99f..bd3ba4cea6551a7f6651e311e2649de191a6faa1 100644
--- a/paddle/fluid/inference/tensorrt/engine.h
+++ b/paddle/fluid/inference/tensorrt/engine.h
@@ -19,6 +19,7 @@ limitations under the License. */
 #include <string>
 #include <unordered_map>
 #include <vector>
+#include "paddle/fluid/framework/tensor.h"
 #include "paddle/fluid/inference/engine.h"
 #include "paddle/fluid/inference/tensorrt/helper.h"
 #include "paddle/fluid/inference/utils/singleton.h"
@@ -52,13 +53,15 @@ class TensorRTEngine : public EngineBase {
   };
 
   TensorRTEngine(int max_batch, int max_workspace,
-                 cudaStream_t* stream = nullptr,
+                 cudaStream_t* stream = nullptr, int device = 0,
                  nvinfer1::ILogger& logger = NaiveLogger::Global())
       : max_batch_(max_batch),
         max_workspace_(max_workspace),
         stream_(stream ? stream : &default_stream_),
-        logger_(logger) {
-    cudaStreamCreate(&default_stream_);
+        logger_(logger),
+        device_(device) {
+    freshDeviceId();
+    cudaStreamCreate(stream_);
   }
 
   virtual ~TensorRTEngine();
@@ -119,6 +122,15 @@ class TensorRTEngine : public EngineBase {
   nvinfer1::INetworkDefinition* network() { return infer_network_.get(); }
   void SetRuntimeBatch(size_t batch_size);
   int GetRuntimeBatch();
+  int GetDevice() { return device_; }
+
+  // A pointer to CPU memory is needed of the TRT weight.
+  // Before TRT runs, fluid loads weight into GPU storage.
+  // so we need to copy the weights from GPU to CPU in our op converter.
+  // We use a map to store these weights for the weight memory is not released
+  // in advance, which affecting the construction of TRT Op.
+  std::unordered_map<std::string /*name*/, std::unique_ptr<framework::Tensor>>
+      weight_map;
 
  private:
   // the max batch size
@@ -140,6 +152,8 @@ class TensorRTEngine : public EngineBase {
   std::unordered_map<std::string /*name*/, size_t /*max size*/> buffer_sizes_;
   std::unordered_map<std::string /*name*/, nvinfer1::ITensor* /*ITensor*/>
       itensor_map_;
+  // The specific GPU id that the TensorRTEngine bounded to.
+  int device_;
 
   // TensorRT related internal members
   template <typename T>
@@ -156,6 +170,10 @@ class TensorRTEngine : public EngineBase {
   infer_ptr<nvinfer1::INetworkDefinition> infer_network_;
   infer_ptr<nvinfer1::ICudaEngine> infer_engine_;
   infer_ptr<nvinfer1::IExecutionContext> infer_context_;
+  // Each ICudaEngine object is bound to a specific GPU when it is instantiated,
+  // ensure that the thread is associated with the correct device by calling
+  // freshDeviceId().
+  void freshDeviceId();
 };  // class TensorRTEngine
 
 // Add an layer__ into engine__ with args ARGS.
@@ -188,8 +206,8 @@ class TRT_EngineManager {
 
   // Create or get an engine called `name`
   TensorRTEngine* Create(int max_batch, int max_workspace, cudaStream_t* stream,
-                         const std::string& name) {
-    auto* p = new TensorRTEngine(max_batch, max_workspace, stream);
+                         const std::string& name, int gpu_device = 0) {
+    auto* p = new TensorRTEngine(max_batch, max_workspace, stream, gpu_device);
     engines_[name].reset(p);
     return p;
   }
diff --git a/paddle/fluid/inference/tensorrt/test_engine.cc b/paddle/fluid/inference/tensorrt/test_engine.cc
index dc03702990587bf5e65d28da662d10df4d882110..da1f6535cb3b2476cd475797861d6d2bb6d88856 100644
--- a/paddle/fluid/inference/tensorrt/test_engine.cc
+++ b/paddle/fluid/inference/tensorrt/test_engine.cc
@@ -27,7 +27,7 @@ namespace tensorrt {
 class TensorRTEngineTest : public ::testing::Test {
  protected:
   void SetUp() override {
-    ASSERT_EQ(0, cudaStreamCreate(&stream_));
+    // ASSERT_EQ(0, cudaStreamCreate(&stream_));
     engine_ = new TensorRTEngine(10, 1 << 10, &stream_);
     engine_->InitNetwork();
   }
diff --git a/paddle/fluid/operators/CMakeLists.txt b/paddle/fluid/operators/CMakeLists.txt
index e8b5dec9d49f5613cec92441d19ab7dc1a1ad90c..e29fe2a42bd1aaee1ea8c01159e331cf47ca6b72 100644
--- a/paddle/fluid/operators/CMakeLists.txt
+++ b/paddle/fluid/operators/CMakeLists.txt
@@ -100,7 +100,8 @@ function(op_library TARGET)
     endif()
 
     # Define operators that don't need pybind here.
-    foreach(manual_pybind_op "compare_op" "logical_op" "nccl_op" "tensor_array_read_write_op")
+    foreach(manual_pybind_op "compare_op" "logical_op" "nccl_op"
+"tensor_array_read_write_op" "tensorrt_engine_op")
         if ("${TARGET}" STREQUAL "${manual_pybind_op}")
             set(pybind_flag 1)
         endif()
@@ -248,6 +249,7 @@ op_library(softmax_op DEPS softmax)
 op_library(sequence_softmax_op DEPS softmax)
 if (WITH_GPU AND TENSORRT_FOUND)
     op_library(tensorrt_engine_op DEPS tensorrt_engine tensorrt_converter)
+    file(APPEND ${pybind_file} "USE_CUDA_ONLY_OP(tensorrt_engine);\n")
     nv_test(test_tensorrt_engine_op SRCS tensorrt_engine_op_test.cc
       DEPS tensorrt_engine_op
       analysis)
diff --git a/paddle/fluid/operators/tensorrt_engine_op.cc b/paddle/fluid/operators/tensorrt_engine_op.cc
index ee3078876c15b06a887064f08dc0c05d450b5f77..1048d3017140c9e31426a1580b2862667116a024 100644
--- a/paddle/fluid/operators/tensorrt_engine_op.cc
+++ b/paddle/fluid/operators/tensorrt_engine_op.cc
@@ -17,112 +17,16 @@
 #include <string>
 #include <vector>
 
-#include "paddle/fluid/framework/op_registry.h"
-#include "paddle/fluid/inference/tensorrt/convert/op_converter.h"
-#include "paddle/fluid/inference/tensorrt/engine.h"
-#include "paddle/fluid/inference/utils/singleton.h"
 #include "paddle/fluid/operators/tensorrt_engine_op.h"
 
 namespace paddle {
 
 DEFINE_int32(tensorrt_engine_batch_size, 1, "the batch_size of TensorRT");
+DEFINE_int32(tensorrt_max_batch_size, 1, "TensorRT maximum batch size");
+DEFINE_int32(tensorrt_workspace_size, 16 << 20, "TensorRT workspace size");
 
 namespace operators {
 
-using inference::Singleton;
-using inference::tensorrt::TRT_EngineManager;
-
-using FluidDT = framework::proto::VarType_Type;
-using TRT_DT = nvinfer1::DataType;
-
-namespace {
-
-TRT_DT FluidDataType2TRT(FluidDT type) {
-  switch (type) {
-    case FluidDT::VarType_Type_FP32:
-      return TRT_DT::kFLOAT;
-    case FluidDT::VarType_Type_INT32:
-      return TRT_DT::kINT32;
-    default:
-      return TRT_DT::kINT32;
-  }
-  PADDLE_THROW("unkown type");
-  return TRT_DT::kINT32;
-}
-
-nvinfer1::Dims Vec2TRT_Dims(const std::vector<int64_t> &shape) {
-  PADDLE_ENFORCE_GT(shape.size(), 1UL,
-                    "TensorRT' tensor input requires at least 2 dimensions");
-  PADDLE_ENFORCE_LE(shape.size(), 4UL,
-                    "TensorRT' tensor input requires at most 4 dimensions");
-  PADDLE_ENFORCE_EQ(shape.size(), 4UL);
-  return nvinfer1::DimsCHW(shape[1], shape[2], shape[3]);
-}
-
-}  // namespace
-
-template <typename DeviceContext, typename T>
-void TensorRTEngineKernel<DeviceContext, T>::Prepare(
-    const framework::ExecutionContext &context) const {
-  VLOG(4) << "Prepare engine";
-  // Get the ProgramDesc and pass to convert.
-  framework::proto::BlockDesc block_desc;
-  block_desc.ParseFromString(context.Attr<std::string>("subgraph"));
-  int max_batch = context.Attr<int>("max_batch");
-  auto max_workspace = context.Attr<int>("max_workspace");
-  auto params = context.Attr<std::vector<std::string>>("parameters");
-  std::unordered_set<std::string> parameters;
-  for (const auto &param : params) {
-    parameters.insert(param);
-  }
-
-  std::vector<std::string> output_maps =
-      context.Attr<std::vector<std::string>>("output_name_mapping");
-
-  // TODO(Superjomn) replace this with a different stream
-  auto *engine = Singleton<TRT_EngineManager>::Global().Create(
-      max_batch, max_workspace, nullptr /*engine hold its own stream*/,
-      context.Attr<std::string>("engine_uniq_key"));
-  engine->InitNetwork();
-
-  framework::BlockDesc block(nullptr /*programdesc*/, &block_desc);
-  VLOG(4) << "parsed var size " << block.AllVars().size();
-  // Add inputs
-  VLOG(4) << "declare inputs";
-  for (auto &input : context.Inputs("Xs")) {
-    if (parameters.count(input)) continue;
-    VLOG(4) << "declare input " << input;
-    auto *var = block.FindVar(input);
-    // TensorRT engine need to create parameters. The parameter's description
-    // should be set in
-    PADDLE_ENFORCE(var, "no variable called %s", input);
-    PADDLE_ENFORCE_EQ(var->GetType(), FluidDT::VarType_Type_LOD_TENSOR,
-                      "TensorRT engine only takes LoDTensor as input");
-    auto shape = var->GetShape();
-    // For the special batch_size placeholder -1, drop it and pass the real
-    // shape of data.
-    // TODO(Superjomn) fix this with batch broadcast, or it can't handle
-    // variational batch size.
-    if (shape[0] == -1) {
-      shape[0] = FLAGS_tensorrt_engine_batch_size;
-    }
-    engine->DeclareInput(
-        input, FluidDataType2TRT(
-                   var->Proto()->type().lod_tensor().tensor().data_type()),
-        Vec2TRT_Dims(shape));
-  }
-
-  inference::Singleton<inference::tensorrt::OpConverter>::Global().ConvertBlock(
-      block_desc, parameters, context.scope(), engine);
-
-  // Add outputs
-  for (auto &output : output_maps) {
-    engine->DeclareOutput(output);
-  }
-
-  engine->FreezeNetwork();
-}
-
 class TensorRTEngineOpMaker : public framework::OpProtoAndCheckerMaker {
  public:
   void Make() override {
@@ -130,8 +34,6 @@ class TensorRTEngineOpMaker : public framework::OpProtoAndCheckerMaker {
     AddOutput("Ys", "A list of outputs").AsDuplicable();
     AddAttr<std::string>("subgraph", "the subgraph.");
     AddAttr<std::string>("engine_uniq_key", "unique key for the TRT engine.");
-    AddAttr<int>("max_batch", "the maximum batch size.");
-    AddAttr<int>("max_workspace", "the maximum batch size.");
     AddComment("TensorRT engine operator.");
   }
 };
@@ -150,11 +52,4 @@ namespace ops = paddle::operators;
 REGISTER_OPERATOR(tensorrt_engine, ops::TensorRTEngineOp,
                   ops::TensorRTEngineOpMaker, ops::TensorRTEngineOpMaker);
 
-REGISTER_OP_CPU_KERNEL(
-    tensorrt_engine,
-    ops::TensorRTEngineKernel<paddle::platform::CPUDeviceContext, float>,
-    ops::TensorRTEngineKernel<paddle::platform::CPUDeviceContext, double>,
-    ops::TensorRTEngineKernel<paddle::platform::CPUDeviceContext, int>,
-    ops::TensorRTEngineKernel<paddle::platform::CPUDeviceContext, int64_t>);
-
 #endif  // PADDLE_WITH_CUDA
diff --git a/paddle/fluid/operators/tensorrt_engine_op.cu.cc b/paddle/fluid/operators/tensorrt_engine_op.cu.cc
new file mode 100644
index 0000000000000000000000000000000000000000..e1ddfde6d51ef719ca0b89cf286b176195ee682a
--- /dev/null
+++ b/paddle/fluid/operators/tensorrt_engine_op.cu.cc
@@ -0,0 +1,24 @@
+/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License. */
+
+#include "paddle/fluid/operators/tensorrt_engine_op.h"
+
+namespace ops = paddle::operators;
+
+REGISTER_OP_CUDA_KERNEL(
+    tensorrt_engine,
+    ops::TensorRTEngineKernel<paddle::platform::CUDADeviceContext, float>,
+    ops::TensorRTEngineKernel<paddle::platform::CUDADeviceContext, double>,
+    ops::TensorRTEngineKernel<paddle::platform::CUDADeviceContext, int>,
+    ops::TensorRTEngineKernel<paddle::platform::CUDADeviceContext, int64_t>);
diff --git a/paddle/fluid/operators/tensorrt_engine_op.h b/paddle/fluid/operators/tensorrt_engine_op.h
index 2cbe1213a2f428a3ce56b06f97636baeb4b66c26..bc556ab3643cefa3e45d2a8a3835937753af723f 100644
--- a/paddle/fluid/operators/tensorrt_engine_op.h
+++ b/paddle/fluid/operators/tensorrt_engine_op.h
@@ -19,16 +19,51 @@
 #include <string>
 #include <vector>
 
+#include "paddle/fluid/framework/op_registry.h"
 #include "paddle/fluid/framework/operator.h"
 #include "paddle/fluid/inference/analysis/helper.h"
+#include "paddle/fluid/inference/tensorrt/convert/op_converter.h"
 #include "paddle/fluid/inference/tensorrt/engine.h"
 
 namespace paddle {
 
 DECLARE_int32(tensorrt_engine_batch_size);
+DECLARE_int32(tensorrt_max_batch_size);
+DECLARE_int32(tensorrt_workspace_size);
 
 namespace operators {
 
+using FluidDT = framework::proto::VarType_Type;
+using TRT_DT = nvinfer1::DataType;
+
+namespace {
+
+TRT_DT FluidDataType2TRT(FluidDT type) {
+  switch (type) {
+    case FluidDT::VarType_Type_FP32:
+      return TRT_DT::kFLOAT;
+    case FluidDT::VarType_Type_INT32:
+      return TRT_DT::kINT32;
+    default:
+      return TRT_DT::kINT32;
+  }
+  PADDLE_THROW("unkown type");
+  return TRT_DT::kINT32;
+}
+
+nvinfer1::Dims Vec2TRT_Dims(const std::vector<int64_t>& shape) {
+  PADDLE_ENFORCE_GT(shape.size(), 1UL,
+                    "TensorRT' tensor input requires at least 2 dimensions");
+  PADDLE_ENFORCE_LE(shape.size(), 4UL,
+                    "TensorRT' tensor input requires at most 4 dimensions");
+  PADDLE_ENFORCE(shape.size() == 4UL || shape.size() == 2UL);
+  if (shape.size() == 4UL)
+    return nvinfer1::DimsCHW(shape[1], shape[2], shape[3]);
+  return nvinfer1::DimsCHW(shape[1], 1, 1);
+}
+
+}  // namespace
+
 using inference::Singleton;
 using inference::tensorrt::TRT_EngineManager;
 
@@ -47,7 +82,7 @@ class TensorRTEngineOp : public framework::OperatorWithKernel {
                                   .FindVar(input0)
                                   ->GetMutable<framework::LoDTensor>()
                                   ->type()),
-        platform::CPUPlace());
+        ctx.GetPlace());
     return kt;
   }
 };
@@ -64,7 +99,7 @@ class TensorRTEngineKernel : public framework::OpKernel<T> {
     auto input_names = context.op().Inputs("Xs");
     PADDLE_ENFORCE(!input_names.empty(), "should pass more than one inputs");
     PADDLE_ENFORCE_LE(FLAGS_tensorrt_engine_batch_size,
-                      context.Attr<int>("max_batch"));
+                      FLAGS_tensorrt_max_batch_size);
 
     std::vector<std::string> output_maps =
         context.Attr<std::vector<std::string>>("output_name_mapping");
@@ -94,12 +129,19 @@ class TensorRTEngineKernel : public framework::OpKernel<T> {
 
     // Convert output tensor from engine to fluid
     int output_index = 0;
+    VLOG(4) << "TensorRT Engine Op Outputs:";
     for (const auto& y : context.Outputs("Ys")) {
+      VLOG(4) << y;
       // convert output and copy to fluid.
       nvinfer1::ITensor* trt_t = engine->GetITensor(output_maps[output_index]);
       auto dims = trt_t->getDimensions();
       // Use the output ITensor's dims to reshape the Fluid Tensor.
-      std::vector<int> ddim(dims.d, dims.d + dims.nbDims);
+      // The ITensor doesn't contain the batch size dim.
+      std::vector<int> ddim;
+      ddim.push_back(FLAGS_tensorrt_engine_batch_size);
+      for (int i = 0; i < dims.nbDims; i++) {
+        ddim.push_back(dims.d[i]);
+      }
 
       auto* fluid_v = context.scope().FindVar(y);
       PADDLE_ENFORCE_NOT_NULL(fluid_v, "no output variable called %s", y);
@@ -113,9 +155,11 @@ class TensorRTEngineKernel : public framework::OpKernel<T> {
       // TODO(Superjomn) change this float to dtype size.
       auto size = inference::analysis::AccuDims(dims.d, dims.nbDims) *
                   FLAGS_tensorrt_engine_batch_size;
-      engine->GetOutputInCPU(output_maps[output_index],
-                             fluid_t->mutable_data<float>(platform::CPUPlace()),
-                             size * sizeof(float));
+      engine->GetOutputInGPU(
+          output_maps[output_index],
+          fluid_t->mutable_data<float>(platform::CUDAPlace(
+              boost::get<platform::CUDAPlace>(context.GetPlace()).device)),
+          size * sizeof(float));
       //} else {
       // engine->GetOutputInGPU(
       // y, fluid_t->mutable_data<float>(platform::CUDAPlace()),
@@ -128,8 +172,67 @@ class TensorRTEngineKernel : public framework::OpKernel<T> {
   }
 
  protected:
-  // Build the engine.
-  void Prepare(const framework::ExecutionContext& context) const;
+  void Prepare(const framework::ExecutionContext& context) const {
+    VLOG(4) << "Prepare engine";
+    // Get the ProgramDesc and pass to convert.
+    framework::proto::BlockDesc block_desc;
+    block_desc.ParseFromString(context.Attr<std::string>("subgraph"));
+    int max_batch = FLAGS_tensorrt_max_batch_size;
+    auto max_workspace = FLAGS_tensorrt_workspace_size;
+    auto params = context.Attr<std::vector<std::string>>("parameters");
+    std::unordered_set<std::string> parameters;
+    for (const auto& param : params) {
+      parameters.insert(param);
+    }
+
+    std::vector<std::string> output_maps =
+        context.Attr<std::vector<std::string>>("output_name_mapping");
+
+    // TODO(Superjomn) replace this with a different stream
+    auto* engine = Singleton<TRT_EngineManager>::Global().Create(
+        max_batch, max_workspace, nullptr /*engine hold its own stream*/,
+        context.Attr<std::string>("engine_uniq_key"),
+        boost::get<platform::CUDAPlace>(context.GetPlace()).device);
+
+    engine->InitNetwork();
+
+    framework::BlockDesc block(nullptr /*programdesc*/, &block_desc);
+    VLOG(4) << "parsed var size " << block.AllVars().size();
+    // Add inputs
+    VLOG(4) << "declare inputs";
+    for (auto& input : context.Inputs("Xs")) {
+      if (parameters.count(input)) continue;
+      VLOG(4) << "declare input " << input;
+      auto* var = block.FindVar(input);
+      // TensorRT engine need to create parameters. The parameter's description
+      // should be set in
+      PADDLE_ENFORCE(var, "no variable called %s", input);
+      PADDLE_ENFORCE_EQ(var->GetType(), FluidDT::VarType_Type_LOD_TENSOR,
+                        "TensorRT engine only takes LoDTensor as input");
+      auto shape = var->GetShape();
+      // For the special batch_size placeholder -1, drop it and pass the real
+      // shape of data.
+      // TODO(Superjomn) fix this with batch broadcast, or it can't handle
+      // variational batch size.
+      if (shape[0] == -1) {
+        shape[0] = FLAGS_tensorrt_engine_batch_size;
+      }
+      engine->DeclareInput(
+          input, FluidDataType2TRT(
+                     var->Proto()->type().lod_tensor().tensor().data_type()),
+          Vec2TRT_Dims(shape));
+    }
+
+    inference::Singleton<inference::tensorrt::OpConverter>::Global()
+        .ConvertBlock(block_desc, parameters, context.scope(), engine);
+
+    // Add outputs
+    for (auto& output : output_maps) {
+      engine->DeclareOutput(output);
+    }
+
+    engine->FreezeNetwork();
+  }
 };
 
 }  // namespace operators
diff --git a/paddle/fluid/operators/tensorrt_engine_op_test.cc b/paddle/fluid/operators/tensorrt_engine_op_test.cc
index 37657fa0b0498986fe67027415279af1775e58b9..27c1d29762b3de5e57f877b271aae52e71eb7cf9 100644
--- a/paddle/fluid/operators/tensorrt_engine_op_test.cc
+++ b/paddle/fluid/operators/tensorrt_engine_op_test.cc
@@ -12,6 +12,7 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License. */
 
+#include "paddle/fluid/operators/tensorrt_engine_op.h"
 #include <gtest/gtest.h>
 #include "paddle/fluid/framework/block_desc.h"
 #include "paddle/fluid/framework/lod_tensor.h"
@@ -23,20 +24,20 @@ limitations under the License. */
 #include "paddle/fluid/inference/tensorrt/convert/op_converter.h"
 #include "paddle/fluid/inference/tensorrt/convert/ut_helper.h"
 
-USE_CPU_ONLY_OP(tensorrt_engine);
+USE_CUDA_ONLY_OP(tensorrt_engine);
 
 namespace paddle {
 namespace operators {
 
 namespace {
-void CreateCPUTensor(framework::Scope* scope, const std::string& name,
-                     const std::vector<int64_t>& shape) {
+void CreateCUDATensor(framework::Scope* scope, const std::string& name,
+                      const std::vector<int64_t>& shape) {
   auto* var = scope->Var(name);
   auto* tensor = var->GetMutable<framework::LoDTensor>();
   auto dims = framework::make_ddim(shape);
   tensor->Resize(dims);
-  platform::CPUPlace place;
-  platform::CPUDeviceContext ctx(place);
+  platform::CUDAPlace place;
+  platform::CUDADeviceContext ctx(place);
   inference::tensorrt::RandomizeTensor(tensor, place, ctx);
 }
 
@@ -57,6 +58,8 @@ void AddTensorToBlockDesc(framework::proto::BlockDesc* block,
 using inference::analysis::SetAttr;
 
 TEST(TensorRTEngineOp, manual) {
+  FLAGS_tensorrt_engine_batch_size = 2;
+  FLAGS_tensorrt_max_batch_size = 2;
   framework::ProgramDesc program;
   auto* block_ = program.Proto()->add_blocks();
   block_->set_idx(0);
@@ -98,8 +101,6 @@ TEST(TensorRTEngineOp, manual) {
   engine_op_desc.SetOutput("Ys", std::vector<std::string>({"z0"}));
   SetAttr<std::string>(engine_op_desc.Proto(), "subgraph",
                        block_->SerializeAsString());
-  SetAttr<int>(engine_op_desc.Proto(), "max_batch", 100);
-  SetAttr<int>(engine_op_desc.Proto(), "max_workspace", 1 << 10);
   SetAttr<std::string>(engine_op_desc.Proto(), "engine_uniq_key", "a_engine");
   SetAttr<std::vector<std::string>>(engine_op_desc.Proto(), "parameters",
                                     std::vector<std::string>({}));
@@ -112,15 +113,15 @@ TEST(TensorRTEngineOp, manual) {
   LOG(INFO) << "engine_op " << engine_op.get();
 
   framework::Scope scope;
-  platform::CPUPlace place;
-  platform::CPUDeviceContext ctx(place);
+  platform::CUDAPlace place;
+  platform::CUDADeviceContext ctx(place);
   // Prepare variables.
-  CreateCPUTensor(&scope, "x", std::vector<int64_t>({2, 4}));
-  CreateCPUTensor(&scope, "y", std::vector<int64_t>({4, 6}));
-  CreateCPUTensor(&scope, "z", std::vector<int64_t>({2, 6}));
+  CreateCUDATensor(&scope, "x", std::vector<int64_t>({2, 4}));
+  CreateCUDATensor(&scope, "y", std::vector<int64_t>({4, 6}));
+  CreateCUDATensor(&scope, "z", std::vector<int64_t>({2, 6}));
 
-  CreateCPUTensor(&scope, "y0", std::vector<int64_t>({6, 8}));
-  CreateCPUTensor(&scope, "z0", std::vector<int64_t>({2, 8}));
+  CreateCUDATensor(&scope, "y0", std::vector<int64_t>({6, 8}));
+  CreateCUDATensor(&scope, "z0", std::vector<int64_t>({2, 8}));
 
   // Execute them.
   LOG(INFO) << "engine_op run";
@@ -128,10 +129,12 @@ TEST(TensorRTEngineOp, manual) {
 }
 
 void Execute(int batch_size, int input_dim, int output_dim, int nlayers = 1) {
+  FLAGS_tensorrt_engine_batch_size = batch_size;
+  FLAGS_tensorrt_max_batch_size = batch_size;
   framework::ProgramDesc program;
   framework::Scope scope;
-  platform::CPUPlace place;
-  platform::CPUDeviceContext ctx(place);
+  platform::CUDAPlace place;
+  platform::CUDADeviceContext ctx(place);
 
   auto* block_ = program.Proto()->add_blocks();
   block_->set_idx(0);
@@ -165,10 +168,10 @@ void Execute(int batch_size, int input_dim, int output_dim, int nlayers = 1) {
 
     // Prepare variables.
     if (!x_created) {
-      CreateCPUTensor(&scope, x_name, std::vector<int64_t>(x_shape));
+      CreateCUDATensor(&scope, x_name, std::vector<int64_t>(x_shape));
     }
-    CreateCPUTensor(&scope, y_name, std::vector<int64_t>(y_shape));
-    CreateCPUTensor(&scope, z_name, std::vector<int64_t>(z_shape));
+    CreateCUDATensor(&scope, y_name, std::vector<int64_t>(y_shape));
+    CreateCUDATensor(&scope, z_name, std::vector<int64_t>(z_shape));
 
     // It is wired, need to copy manually.
     *block_->add_ops() = *fc->Proto();