Merge branch 'develop' into all_data

doc/fluid/new_docs/user_guides/howto/debug/visualdl.md

@@ -104,6 +104,7 @@ visualDL --logdir=scratch_log --port=8080
 
 # 访问 http://127.0.0.1:8080
 ```
+如果出现`TypeError: __init__() got an unexpected keyword argument 'file'`, 是因为protobuf不是3.5以上，运行`pip install --upgrade protobuf`就能解决。
 
 如果在虚拟环境下仍然遇到安装问题，请尝试以下方法。
 

paddle/fluid/API.spec

@@ -43,6 +43,7 @@ paddle.fluid.Executor.run ArgSpec(args=['self', 'program', 'feed', 'fetch_list',
 paddle.fluid.global_scope ArgSpec(args=[], varargs=None, keywords=None, defaults=None)
 paddle.fluid.scope_guard ArgSpec(args=[], varargs='args', keywords='kwds', defaults=None)
 paddle.fluid.Trainer.__init__ ArgSpec(args=['self', 'train_func', 'optimizer_func', 'param_path', 'place', 'parallel', 'checkpoint_config'], varargs=None, keywords=None, defaults=(None, None, False, None))
+paddle.fluid.Trainer.save_inference_model ArgSpec(args=['self', 'param_path', 'feeded_var_names', 'target_var_indexes'], varargs=None, keywords=None, defaults=None)
 paddle.fluid.Trainer.save_params ArgSpec(args=['self', 'param_path'], varargs=None, keywords=None, defaults=None)
 paddle.fluid.Trainer.stop ArgSpec(args=['self'], varargs=None, keywords=None, defaults=None)
 paddle.fluid.Trainer.test ArgSpec(args=['self', 'reader', 'feed_order'], varargs=None, keywords=None, defaults=None)
@@ -376,7 +377,7 @@ paddle.fluid.optimizer.DecayedAdagradOptimizer.__init__ ArgSpec(args=['self', 'l
 paddle.fluid.optimizer.DecayedAdagradOptimizer.minimize ArgSpec(args=['self', 'loss', 'startup_program', 'parameter_list', 'no_grad_set'], varargs=None, keywords=None, defaults=(None, None, None))
 paddle.fluid.optimizer.FtrlOptimizer.__init__ ArgSpec(args=['self', 'learning_rate', 'l1', 'l2', 'lr_power'], varargs=None, keywords='kwargs', defaults=(0.0, 0.0, -0.5))
 paddle.fluid.optimizer.FtrlOptimizer.minimize ArgSpec(args=['self', 'loss', 'startup_program', 'parameter_list', 'no_grad_set'], varargs=None, keywords=None, defaults=(None, None, None))
-paddle.fluid.optimizer.RMSPropOptimizer.__init__ ArgSpec(args=['self', 'learning_rate', 'rho', 'epsilon', 'momentum'], varargs=None, keywords='kwargs', defaults=(0.95, 1e-06, 0.0))
+paddle.fluid.optimizer.RMSPropOptimizer.__init__ ArgSpec(args=['self', 'learning_rate', 'rho', 'epsilon', 'momentum', 'centered'], varargs=None, keywords='kwargs', defaults=(0.95, 1e-06, 0.0, False))
 paddle.fluid.optimizer.RMSPropOptimizer.minimize ArgSpec(args=['self', 'loss', 'startup_program', 'parameter_list', 'no_grad_set'], varargs=None, keywords=None, defaults=(None, None, None))
 paddle.fluid.optimizer.AdadeltaOptimizer.__init__ ArgSpec(args=['self', 'learning_rate', 'epsilon', 'rho'], varargs=None, keywords='kwargs', defaults=(1e-06, 0.95))
 paddle.fluid.optimizer.AdadeltaOptimizer.minimize ArgSpec(args=['self', 'loss', 'startup_program', 'parameter_list', 'no_grad_set'], varargs=None, keywords=None, defaults=(None, None, None))

paddle/fluid/framework/ir/fc_lstm_fuse_pass.cc

@@ -11,6 +11,7 @@
 // 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/ir/fc_lstm_fuse_pass.h"
 #include <string>
 #include "paddle/fluid/framework/lod_tensor.h"

paddle/fluid/framework/ir/graph_viz_pass.cc

@@ -50,20 +50,37 @@ std::unique_ptr<ir::Graph> GraphVizPass::ApplyImpl(
 
   Dot dot;
 
-  std::vector<Dot::Attr> op_attrs({Dot::Attr("style", "filled"),
-                                   Dot::Attr("shape", "box"),
-                                   Dot::Attr("fillcolor", "red")});
-  std::vector<Dot::Attr> var_attrs({Dot::Attr("style", "filled,rounded"),
-                                    // Dot::Attr("shape", "diamond"),
-                                    Dot::Attr("fillcolor", "yellow")});
-
-  std::vector<Dot::Attr> marked_op_attrs({Dot::Attr("style", "filled"),
-                                          Dot::Attr("shape", "box"),
-                                          Dot::Attr("fillcolor", "lightgray")});
-  std::vector<Dot::Attr> marked_var_attrs(
-      {Dot::Attr("style", "filled,rounded"),
-       // Dot::Attr("shape", "diamond"),
-       Dot::Attr("fillcolor", "lightgray")});
+  const std::vector<Dot::Attr> op_attrs({
+      Dot::Attr("style", "rounded,filled,bold"),  //
+      Dot::Attr("shape", "box"),                  //
+      Dot::Attr("color", "#303A3A"),              //
+      Dot::Attr("fontcolor", "#ffffff"),          //
+      Dot::Attr("width", "1.3"),                  //
+      Dot::Attr("height", "0.84"),                //
+      Dot::Attr("fontname", "Arial"),             //
+  });
+  const std::vector<Dot::Attr> arg_attrs({
+      Dot::Attr("shape", "box"),                  //
+      Dot::Attr("style", "rounded,filled,bold"),  //
+      Dot::Attr("fontname", "Arial"),             //
+      Dot::Attr("fillcolor", "#999999"),          //
+      Dot::Attr("color", "#dddddd"),              //
+  });
+
+  const std::vector<Dot::Attr> param_attrs({
+      Dot::Attr("shape", "box"),                  //
+      Dot::Attr("style", "rounded,filled,bold"),  //
+      Dot::Attr("fontname", "Arial"),             //
+      Dot::Attr("color", "#148b97"),              //
+      Dot::Attr("fontcolor", "#ffffff"),          //
+  });
+
+  const std::vector<Dot::Attr> marked_op_attrs(
+      {Dot::Attr("style", "rounded,filled,bold"), Dot::Attr("shape", "box"),
+       Dot::Attr("fillcolor", "yellow")});
+  const std::vector<Dot::Attr> marked_var_attrs(
+      {Dot::Attr("style", "filled,rounded"), Dot::Attr("shape", "box"),
+       Dot::Attr("fillcolor", "yellow")});
 
   auto marked_nodes = ConsumeMarkedNodes(graph.get());
   // Create nodes
@@ -74,9 +91,17 @@ std::unique_ptr<ir::Graph> GraphVizPass::ApplyImpl(
           marked_nodes.count(n) ? marked_op_attrs : op_attrs;
       dot.AddNode(node_id, attr, node_id);
     } else if (n->IsVar()) {
-      decltype(op_attrs) attr =
-          marked_nodes.count(n) ? marked_var_attrs : var_attrs;
-      dot.AddNode(node_id, attr, node_id);
+      decltype(op_attrs)* attr;
+      if (marked_nodes.count(n)) {
+        attr = &marked_var_attrs;
+      } else if (const_cast<Node*>(n)->Var() &&
+                 const_cast<Node*>(n)->Var()->Persistable()) {
+        attr = &param_attrs;
+      } else {
+        attr = &arg_attrs;
+      }
+
+      dot.AddNode(node_id, *attr, node_id);
     }
     node2dot[n] = node_id;
   }

paddle/fluid/inference/analysis/CMakeLists.txt

@@ -105,6 +105,6 @@ if (NOT EXISTS ${TEXT_CLASSIFICATION_INSTALL_DIR} AND WITH_TESTING AND WITH_INFE
   inference_download_and_uncompress(${TEXT_CLASSIFICATION_INSTALL_DIR} ${TEXT_CLASSIFICATION_MODEL_URL} "text-classification-Senta.tar.gz")
 endif()
 
-inference_analysis_test(test_text_classification SRCS test_text_classification.cc
+inference_analysis_test(test_text_classification SRCS analyzer_text_classification_tester.cc
     EXTRA_DEPS paddle_inference_api paddle_fluid_api analysis_predictor
     ARGS --infer_model=${TEXT_CLASSIFICATION_INSTALL_DIR}/text-classification-Senta)

paddle/fluid/inference/analysis/test_text_classification.cc → paddle/fluid/inference/analysis/analyzer_text_classification_tester.cc

@@ -12,14 +12,16 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+#include "paddle/fluid/inference/analysis/analyzer.h"
 #include <gflags/gflags.h>
 #include <glog/logging.h>  // use glog instead of PADDLE_ENFORCE to avoid importing other paddle header files.
 #include <gtest/gtest.h>
 #include "paddle/fluid/framework/ir/pass.h"
-#include "paddle/fluid/inference/analysis/analyzer.h"
 #include "paddle/fluid/inference/analysis/ut_helper.h"
 #include "paddle/fluid/inference/api/helper.h"
 #include "paddle/fluid/inference/api/paddle_inference_api.h"
+#include "paddle/fluid/inference/api/paddle_inference_pass.h"
+#include "paddle/fluid/inference/api/timer.h"
 
 DEFINE_string(infer_model, "", "Directory of the inference model.");
 DEFINE_string(infer_data, "", "Path of the dataset.");
@@ -86,10 +88,3 @@ TEST(text_classification, basic) { Main(FLAGS_batch_size); }
 
 }  // namespace inference
 }  // namespace paddle
-
-USE_PASS(fc_fuse_pass);
-USE_PASS(seq_concat_fc_fuse_pass);
-USE_PASS(fc_lstm_fuse_pass);
-USE_PASS(graph_viz_pass);
-USE_PASS(infer_clean_graph_pass);
-USE_PASS(attention_lstm_fuse_pass);

paddle/fluid/inference/api/CMakeLists.txt

@@ -44,19 +44,7 @@ function(inference_api_test TARGET_NAME)
 endfunction(inference_api_test)
 
 cc_library(paddle_inference_api SRCS api.cc api_impl.cc helper.cc DEPS lod_tensor)
-cc_library(analysis_predictor SRCS analysis_predictor.cc DEPS paddle_inference_api
-          analysis
-          ir_pass_manager
-          pass
-          fc_fuse_pass
-          fc_lstm_fuse_pass
-          seq_concat_fc_fuse_pass
-          graph_viz_pass
-          infer_clean_graph_pass
-          graph_pattern_detector
-          infer_clean_graph_pass
-          attention_lstm_fuse_pass
-  )
+cc_library(analysis_predictor SRCS analysis_predictor.cc DEPS paddle_inference_api analysis)
 
 cc_test(test_paddle_inference_api
         SRCS api_tester.cc

paddle/fluid/operators/fake_quantize_op.cu

@@ -119,7 +119,8 @@ struct FindRangeAbsMaxFunctor<platform::CUDADeviceContext, T> {
                   const framework::Tensor& last_scale,
                   const framework::Tensor& iter, const int window_size,
                   framework::Tensor* scales_arr, framework::Tensor* out_scale) {
-    auto& gpu_place = boost::get<platform::CUDAPlace>(ctx.GetPlace());
+    const auto gpu_place = boost::get<platform::CUDAPlace>(ctx.GetPlace());
+
     T* scale_arr = scales_arr->mutable_data<T>(gpu_place);
     T* out_scale_data = out_scale->mutable_data<T>(gpu_place);
 

paddle/fluid/operators/flatten_op.cc

@@ -157,6 +157,116 @@ class FlattenGradOp : public framework::OperatorBase {
   }
 };
 
+// FIXME(zcd): flatten2 adds an intermediate output(XShape) based on flatten,
+// the XShape is used to carry the shape and lod of X which will be used in
+// flatten_grad, in this way, the framework can reuse the memory of X
+// immediately the flatten2_op is finished.
+// Considering compatibility issues, we could not fix flatten2_op
+class Flatten2OpInferShape : public FlattenOpInferShape {
+ public:
+  void operator()(framework::InferShapeContext *ctx) const override {
+    FlattenOpInferShape::operator()(ctx);
+    PADDLE_ENFORCE(ctx->HasOutput("XShape"),
+                   "Output (XShape) of Flatten op should not be null.");
+    const auto &in_dims = ctx->GetInputDim("X");
+    std::vector<int64_t> xshape_dims(in_dims.size() + 1);
+    xshape_dims[0] = 0;
+    for (int i = 0; i < in_dims.size(); ++i) {
+      xshape_dims[i + 1] = in_dims[i];
+    }
+    ctx->SetOutputDim("XShape", framework::make_ddim(xshape_dims));
+    ctx->ShareLoD("X", "XShape");
+  }
+};
+
+class Flatten2Op : public framework::OperatorBase {
+ public:
+  using OperatorBase::OperatorBase;
+
+ private:
+  void RunImpl(const framework::Scope &scope,
+               const platform::Place &place) const override {
+    auto &axis = Attr<int>("axis");
+    auto in_dims =
+        scope.FindVar(Input("X"))->Get<framework::LoDTensor>().dims();
+    const auto &out_dims = FlattenOpInferShape::GetOutputShape(axis, in_dims);
+
+    framework::AttributeMap attrs;
+    attrs["shape"] = out_dims;
+    attrs["inplace"] = false;
+    // Invoke Reshape Op
+    auto reshape_op = framework::OpRegistry::CreateOp(
+        "reshape2", {{"X", {Input("X")}}, {"Shape", {}}},
+        {{"Out", {Output("Out")}}, {"XShape", {Output("XShape")}}}, attrs);
+    reshape_op->Run(scope, place);
+  }
+};
+
+class Flatten2OpMaker : public FlattenOpMaker {
+ public:
+  void Make() override {
+    FlattenOpMaker::Make();
+    AddOutput("XShape",
+              "XShape is just used to store the shape and lod of X, which will "
+              "be used in FlattenGradOp.")
+        .AsIntermediate();
+  }
+};
+
+class Flatten2GradOpMaker : public framework::SingleGradOpDescMaker {
+ public:
+  using framework::SingleGradOpDescMaker::SingleGradOpDescMaker;
+
+  std::unique_ptr<framework::OpDesc> Apply() const override {
+    auto *grad_op = new framework::OpDesc();
+    grad_op->SetType("flatten2_grad");
+    grad_op->SetInput("XShape", Output("XShape"));
+    grad_op->SetInput(framework::GradVarName("Out"), OutputGrad("Out"));
+    grad_op->SetOutput(framework::GradVarName("X"), InputGrad("X"));
+    grad_op->SetAttrMap(Attrs());
+    return std::unique_ptr<framework::OpDesc>(grad_op);
+  }
+};
+
+class Flatten2GradInferShape : public framework::InferShapeBase {
+ public:
+  void operator()(framework::InferShapeContext *context) const override {
+    PADDLE_ENFORCE(context->HasInput("XShape"),
+                   "Input(XShape) shouldn't be null.");
+    PADDLE_ENFORCE(context->HasInput(framework::GradVarName("Out")),
+                   "Input(Out@GRAD) shouldn't be null.");
+    auto xshape_dims = context->GetInputDim("XShape");
+    auto x_dims = framework::slice_ddim(xshape_dims, 1, xshape_dims.size());
+    context->SetOutputDim(framework::GradVarName("X"), x_dims);
+    context->ShareLoD("XShape", framework::GradVarName("X"));
+  }
+};
+
+class Flatten2GradOp : public framework::OperatorBase {
+ public:
+  using OperatorBase::OperatorBase;
+
+ private:
+  void RunImpl(const framework::Scope &scope,
+               const platform::Place &place) const override {
+    auto dx_name = Output(framework::GradVarName("X"));
+    auto dout_name = Input(framework::GradVarName("Out"));
+    auto xshape_name = Input("XShape");
+    auto xshape_dims =
+        scope.FindVar(xshape_name)->Get<framework::LoDTensor>().dims();
+    auto x_dims = framework::slice_ddim(xshape_dims, 1, xshape_dims.size());
+
+    framework::AttributeMap attrs;
+    attrs["shape"] = framework::vectorize2int(x_dims);
+    attrs["inplace"] = false;
+
+    auto reshape_op = framework::OpRegistry::CreateOp(
+        "reshape2", {{"X", {dout_name}}, {"Shape", {}}},
+        {{"Out", {dx_name}}, {"XShape", {xshape_name}}}, attrs);
+    reshape_op->Run(scope, place);
+  }
+};
+
 }  // namespace operators
 }  // namespace paddle
 
@@ -167,3 +277,8 @@ REGISTER_OPERATOR(flatten, ops::FlattenOp, ops::FlattenOpMaker,
                   ops::FlattenOpInferShape,
                   paddle::framework::DefaultGradOpDescMaker<true>);
 REGISTER_OPERATOR(flatten_grad, ops::FlattenGradOp, ops::FlattenGradInferShape);
+
+REGISTER_OPERATOR(flatten2, ops::Flatten2Op, ops::Flatten2OpMaker,
+                  ops::Flatten2OpInferShape, ops::Flatten2GradOpMaker);
+REGISTER_OPERATOR(flatten2_grad, ops::Flatten2GradOp,
+                  ops::Flatten2GradInferShape);

paddle/fluid/operators/fusion_gru_op.cc

@@ -30,14 +30,7 @@ void FusionGRUOp::InferShape(framework::InferShapeContext* ctx) const {
                  "Input(WeightX) of GRU should not be null.");
   PADDLE_ENFORCE(ctx->HasInput("WeightH"),
                  "Input(WeightH) of GRU should not be null.");
-
   PADDLE_ENFORCE(ctx->HasOutput("XX"), "Output(XX) of GRU should not be null.");
-  PADDLE_ENFORCE(ctx->HasOutput("ReorderedH0"),
-                 "Output(ReorderedH0) of GRU should not be null.");
-  PADDLE_ENFORCE(ctx->HasOutput("BatchedInput"),
-                 "Output(BatchedInput) of GRU should not be null.");
-  PADDLE_ENFORCE(ctx->HasOutput("BatchedOut"),
-                 "Output(BatchedOut) of GRU should not be null.");
   PADDLE_ENFORCE(ctx->HasOutput("Hidden"),
                  "Output(Hidden) of GRU should not be null.");
 
@@ -80,15 +73,20 @@ void FusionGRUOp::InferShape(framework::InferShapeContext* ctx) const {
   }
   framework::DDim out_dims({x_dims[0], frame_size});
   ctx->SetOutputDim("Hidden", out_dims);
-  ctx->SetOutputDim("BatchedInput", {x_dims[0], wx_dims[1]});
-  ctx->SetOutputDim("BatchedOut", out_dims);
   ctx->ShareLoD("X", "Hidden");
-
   int xx_width;
   if (ctx->Attrs().Get<bool>("use_seq")) {
     xx_width = wx_dims[1];
   } else {
     xx_width = x_dims[1] > wx_dims[1] ? wx_dims[1] : x_dims[1];
+    PADDLE_ENFORCE(ctx->HasOutput("ReorderedH0"),
+                   "Output(ReorderedH0) of GRU should not be null.");
+    PADDLE_ENFORCE(ctx->HasOutput("BatchedInput"),
+                   "Output(BatchedInput) of GRU should not be null.");
+    PADDLE_ENFORCE(ctx->HasOutput("BatchedOut"),
+                   "Output(BatchedOut) of GRU should not be null.");
+    ctx->SetOutputDim("BatchedInput", {x_dims[0], wx_dims[1]});
+    ctx->SetOutputDim("BatchedOut", out_dims);
   }
   ctx->SetOutputDim("XX", {x_dims[0], xx_width});
   ctx->ShareLoD("X", "XX");

paddle/fluid/operators/layer_norm_op.cu

@@ -67,27 +67,27 @@ template <typename T, int BlockDim>
 __global__ void LayerNormForward(const T *x, const T *scale, const T *bias,
                                  T *y, T *mean, T *var, float epsilon,
                                  int feature_size) {
-  using BlockReduce = cub::BlockReduce<PairForLayerNorm<T>, BlockDim>;
+  using BlockReduce = cub::BlockReduce<PairForLayerNorm<double>, BlockDim>;
   __shared__ typename BlockReduce::TempStorage temp_storage;
 
   int beg_idx = blockIdx.x * feature_size + threadIdx.x;
   int end_idx = (blockIdx.x + 1) * feature_size;
 
   // Step 1: Reduce to calculate mean and var
-  T mean_val = static_cast<T>(0);
-  T var_val = static_cast<T>(0);
+  double mean_val = 0;
+  double var_val = 0;
   for (int i = beg_idx; i < end_idx; i += BlockDim) {
     T tmp = x[i];
     mean_val += tmp;
     var_val += (tmp * tmp);
   }
   auto pair = BlockReduce(temp_storage)
-                  .Reduce(PairForLayerNorm<T>(mean_val, var_val),
-                          PairForLayerNormAddFunctor<T>());
+                  .Reduce(PairForLayerNorm<double>(mean_val, var_val),
+                          PairForLayerNormAddFunctor<double>());
   if (threadIdx.x == 0) {
     auto tmp = pair.first_ / feature_size;
-    mean[blockIdx.x] = tmp;
-    var[blockIdx.x] = pair.second_ / feature_size - tmp * tmp;
+    mean[blockIdx.x] = static_cast<T>(tmp);
+    var[blockIdx.x] = static_cast<T>(pair.second_ / feature_size - tmp * tmp);
   }
   __syncthreads();
   mean_val = mean[blockIdx.x];

paddle/fluid/operators/reshape_op.cc

@@ -246,6 +246,88 @@ class ReshapeGradKernel {
   }
 };
 
+// FIXME(zcd): reshape2 adds an intermediate output(XShape) based on reshape,
+// the XShape is used to carry the shape and lod of X which will be used in
+// reshape_grad, in this way, the framework can reuse the memory of X
+// immediately the reshape_op is finished.
+// Considering compatibility issues, we could not fix reshape_op
+class Reshape2Op : public ReshapeOp {
+ public:
+  Reshape2Op(const std::string &type, const framework::VariableNameMap &inputs,
+             const framework::VariableNameMap &outputs,
+             const framework::AttributeMap &attrs)
+      : ReshapeOp(type, inputs, outputs, attrs) {}
+
+  void InferShape(framework::InferShapeContext *ctx) const override {
+    ReshapeOp::InferShape(ctx);
+    PADDLE_ENFORCE(ctx->HasOutput("XShape"),
+                   "Output(XShape) of ReshapeOp should not be null.");
+    const auto &x_dims = ctx->GetInputDim("X");
+    std::vector<int64_t> xshape_dims(x_dims.size() + 1);
+    xshape_dims[0] = 0;
+    for (int i = 0; i < x_dims.size(); ++i) {
+      xshape_dims[i + 1] = x_dims[i];
+    }
+    ctx->SetOutputDim("XShape", framework::make_ddim(xshape_dims));
+    ctx->ShareLoD("X", /*->*/ "XShape");
+  }
+};
+
+class Reshape2OpMaker : public ReshapeOpMaker {
+ public:
+  void Make() override {
+    ReshapeOpMaker::Make();
+    AddOutput("XShape",
+              "XShape is just used to store the shape and lod of X, which will "
+              "be used in FlattenGradOp.")
+        .AsIntermediate();
+  }
+};
+
+class Reshape2GradMaker : public framework::SingleGradOpDescMaker {
+ public:
+  using framework::SingleGradOpDescMaker::SingleGradOpDescMaker;
+
+  std::unique_ptr<framework::OpDesc> Apply() const override {
+    auto *grad_op = new framework::OpDesc();
+    grad_op->SetType("reshape2_grad");
+    grad_op->SetInput("XShape", Output("XShape"));
+    grad_op->SetInput(framework::GradVarName("Out"), OutputGrad("Out"));
+    grad_op->SetOutput(framework::GradVarName("X"), InputGrad("X"));
+    grad_op->SetAttrMap(Attrs());
+    return std::unique_ptr<framework::OpDesc>(grad_op);
+  }
+};
+
+class Reshape2GradOp : public framework::OperatorWithKernel {
+ public:
+  Reshape2GradOp(const std::string &type,
+                 const framework::VariableNameMap &inputs,
+                 const framework::VariableNameMap &outputs,
+                 const framework::AttributeMap &attrs)
+      : OperatorWithKernel(type, inputs, outputs, attrs) {}
+
+  void InferShape(framework::InferShapeContext *ctx) const override {
+    PADDLE_ENFORCE(ctx->HasInput("XShape"), "Input(XShape) shouldn't be null.");
+    PADDLE_ENFORCE(ctx->HasInput(framework::GradVarName("Out")),
+                   "Input(Out@GRAD) shouldn't be null.");
+    auto xshape_dims = ctx->GetInputDim("XShape");
+    auto x_dims = framework::slice_ddim(xshape_dims, 1, xshape_dims.size());
+    ctx->SetOutputDim(framework::GradVarName("X"), x_dims);
+    ctx->ShareLoD("XShape", framework::GradVarName("X"));
+  }
+
+ protected:
+  framework::OpKernelType GetExpectedKernelType(
+      const framework::ExecutionContext &ctx) const override {
+    return framework::OpKernelType(
+        framework::ToDataType(
+            ctx.Input<framework::LoDTensor>(framework::GradVarName("Out"))
+                ->type()),
+        ctx.device_context());
+  }
+};
+
 }  // namespace operators
 }  // namespace paddle
 namespace ops = paddle::operators;
@@ -261,6 +343,17 @@ REGISTER_OP_CPU_KERNEL_FUNCTOR(reshape_grad, float, ops::ReshapeGradKernel,
                                ops::ReshapeGradKernel, int64_t,
                                ops::ReshapeGradKernel);
 
+REGISTER_OPERATOR(reshape2, ops::Reshape2Op, ops::Reshape2OpMaker,
+                  ops::Reshape2GradMaker);
+REGISTER_OPERATOR(reshape2_grad, ops::Reshape2GradOp);
+REGISTER_OP_CPU_KERNEL_FUNCTOR(reshape2, float, ops::ReshapeKernel, double,
+                               ops::ReshapeKernel, int, ops::ReshapeKernel,
+                               int64_t, ops::ReshapeKernel);
+REGISTER_OP_CPU_KERNEL_FUNCTOR(reshape2_grad, float, ops::ReshapeGradKernel,
+                               double, ops::ReshapeGradKernel, int,
+                               ops::ReshapeGradKernel, int64_t,
+                               ops::ReshapeGradKernel);
+
 #ifdef PADDLE_WITH_CUDA
 REGISTER_OP_CUDA_KERNEL_FUNCTOR(reshape, float, ops::ReshapeKernel, double,
                                 ops::ReshapeKernel, int, ops::ReshapeKernel,
@@ -269,4 +362,11 @@ REGISTER_OP_CUDA_KERNEL_FUNCTOR(reshape_grad, float, ops::ReshapeGradKernel,
                                 double, ops::ReshapeGradKernel, int,
                                 ops::ReshapeGradKernel, int64_t,
                                 ops::ReshapeGradKernel);
+REGISTER_OP_CUDA_KERNEL_FUNCTOR(reshape2, float, ops::ReshapeKernel, double,
+                                ops::ReshapeKernel, int, ops::ReshapeKernel,
+                                int64_t, ops::ReshapeKernel);
+REGISTER_OP_CUDA_KERNEL_FUNCTOR(reshape2_grad, float, ops::ReshapeGradKernel,
+                                double, ops::ReshapeGradKernel, int,
+                                ops::ReshapeGradKernel, int64_t,
+                                ops::ReshapeGradKernel);
 #endif

paddle/fluid/operators/rmsprop_op.cc

@@ -36,9 +36,13 @@ class RmspropOp : public framework::OperatorWithKernel {
     PADDLE_ENFORCE(ctx->HasOutput("ParamOut"),
                    "Output(param_out) of RmspropOp should not be null.");
     PADDLE_ENFORCE(ctx->HasOutput("MomentOut"),
-                   "Output(Momentum_out) of RmspropOp should not be null.");
+                   "Output(MomentOut) of RmspropOp should not be null.");
     PADDLE_ENFORCE(ctx->HasOutput("MeanSquareOut"),
                    "Output(MeanSquareOut) of RmspropOp should not be null.");
+    if (ctx->Attrs().Get<bool>("centered")) {
+      PADDLE_ENFORCE(ctx->HasOutput("MeanGradOut"),
+                     "Output(MeanGradOut) of RmspropOp should not be null.");
+    }
 
     auto param_dim = ctx->GetInputDim("Param");
     PADDLE_ENFORCE_EQ(
@@ -58,6 +62,9 @@ class RmspropOp : public framework::OperatorWithKernel {
     ctx->SetOutputDim("ParamOut", param_dim);
     ctx->SetOutputDim("MomentOut", param_dim);
     ctx->SetOutputDim("MeanSquareOut", param_dim);
+    if (ctx->Attrs().Get<bool>("centered")) {
+      ctx->SetOutputDim("MeanGradOut", param_dim);
+    }
   }
 };
 
@@ -70,6 +77,10 @@ class RmspropOpMaker : public framework::OpProtoAndCheckerMaker {
     AddInput("MeanSquare",
              "(Tensor, default Tensor<float>)"
              " The mean square value that gets updated.");
+    AddInput("MeanGrad",
+             "(Tensor, default Tensor<float>)"
+             " The moving average of gradient")
+        .AsDispensable();
     AddInput("LearningRate",
              "(Tensor, default Tensor<float>) "
              "The learning rate should be a tensor of size 1.");
@@ -82,6 +93,8 @@ class RmspropOpMaker : public framework::OpProtoAndCheckerMaker {
     AddOutput("ParamOut", "(Tensor) Output updated parameter value.");
     AddOutput("MomentOut", "(Tensor) Output updated moment.");
     AddOutput("MeanSquareOut", "(Tensor) Output Mean squared updated value.");
+    AddOutput("MeanGradOut",
+              "(Tensor) Output moving average of gradient updated value.");
 
     AddAttr<float>("epsilon",
                    "(float, default 1e-10) Constant "
@@ -93,6 +106,8 @@ class RmspropOpMaker : public framework::OpProtoAndCheckerMaker {
         .SetDefault(0.9f);
     AddAttr<float>("momentum", "(float, default 0.0) Constant value.")
         .SetDefault(0.0f);
+    AddAttr<bool>("centered", "(bool, default false) use centered rmsprop.")
+        .SetDefault(false);
     AddComment(R"DOC(
 Rmsprop Optimizer. 
 
@@ -103,6 +118,14 @@ MomentOut = momentum * Moment +
 ParamOut = Param -  MomentOut
 $$
 
+if centered is true:
+
+mean_grad = decay * mean_square{t-1} + (1-decay) * gradient
+mean_square = decay * mean_square{t-1} + (1-decay) * gradient ** 2
+mom = momentum * mom{t-1} + learning_rate * g_t /
+    sqrt(mean_square - mean_grad**2 + epsilon)
+param -= mom
+
 The original slides that proposed Rmsprop: Slide 29 of
 http://www.cs.toronto.edu/~tijmen/csc321/slides/lecture_slides_lec6.pdf)
 

paddle/fluid/operators/rmsprop_op.h

@@ -41,6 +41,7 @@ class RmspropOpKernel : public framework::OpKernel<T> {
     float epsilon = ctx.Attr<float>("epsilon");
     float rho = ctx.Attr<float>("decay");
     float momentum = ctx.Attr<float>("momentum");
+    bool centered = ctx.Attr<bool>("centered");
 
     auto p = EigenVector<T>::Flatten(*ctx.Input<Tensor>("Param"));
     auto ms = EigenVector<T>::Flatten(*ctx.Input<Tensor>("MeanSquare"));
@@ -53,12 +54,24 @@ class RmspropOpKernel : public framework::OpKernel<T> {
     auto ms_out = EigenVector<T>::Flatten(*mean_square_out);
     auto& place = *ctx.template device_context<DeviceContext>().eigen_device();
 
-    Eigen::DSizes<int, 1> grad_dsize(grad->numel());
+    Eigen::DSizes<int, 1> grad_dsize(static_cast<int>(grad->numel()));
 
     ms_out.device(place) = rho * ms + (1 - rho) * g * g;
-    mom_out.device(place) =
-        momentum * mom +
-        lr.broadcast(grad_dsize) * g / (ms_out + epsilon).sqrt();
+    if (centered) {
+      auto mg = EigenVector<T>::Flatten(*ctx.Input<Tensor>("MeanGrad"));
+      auto* mean_grad_out = ctx.Output<Tensor>("MeanGradOut");
+      mean_grad_out->mutable_data<T>(ctx.GetPlace());
+      auto mg_out = EigenVector<T>::Flatten(*mean_grad_out);
+
+      mg_out.device(place) = rho * mg + (1 - rho) * g;
+      mom_out.device(place) = momentum * mom +
+                              lr.broadcast(grad_dsize) * g /
+                                  (ms_out - mg_out.square() + epsilon).sqrt();
+    } else {
+      mom_out.device(place) =
+          momentum * mom +
+          lr.broadcast(grad_dsize) * g / (ms_out + epsilon).sqrt();
+    }
     p_out.device(place) = p - mom_out;
   }
 };

paddle/fluid/operators/squeeze_op.cc

@@ -126,15 +126,15 @@ class SqueezeOpMaker : public framework::OpProtoAndCheckerMaker {
         .SetDefault({});
     AddComment(R"DOC(
         Squeeze Operator.
-        
-        Remove single-dimensional entries from the shape of a tensor. 
-        Takes a parameter axes with a list of axes to squeeze. 
-        If axes is not provided, all the single dimensions will be removed from the shape. 
+
+        Remove single-dimensional entries from the shape of a tensor.
+        Takes a parameter axes with a list of axes to squeeze.
+        If axes is not provided, all the single dimensions will be removed from the shape.
         If an axis is selected with shape entry not equal to one, an error is raised.
-        
+
         Examples:
         Case 1:
-          Given 
+          Given
             X.shape = (1, 3, 1, 5)
           and
             axes = [0]
@@ -144,7 +144,7 @@ class SqueezeOpMaker : public framework::OpProtoAndCheckerMaker {
         Case 2:
           Given
             X.shape = (1, 3, 1, 5)
-          and 
+          and
             axes = []
           we get:
             Out.shape = (3, 5)
@@ -181,6 +181,113 @@ class SqueezeGradOp : public framework::OperatorBase {
   }
 };
 
+// FIXME(zcd): squeeze2 adds an intermediate output(XShape) based on squeeze,
+// the XShape is used to carry the shape and lod of X which will be used in
+// squeeze_grad, in this way, the framework can reuse the memory of X
+// immediately the squeeze2_op is finished.
+// Considering compatibility issues, we could not fix squeeze2_op
+class Squeeze2OpMaker : public SqueezeOpMaker {
+ public:
+  void Make() override {
+    SqueezeOpMaker::Make();
+    AddOutput("XShape",
+              "XShape is just used to store the shape and lod of X, which will "
+              "be used in SqueezeGradOp.")
+        .AsIntermediate();
+  }
+};
+
+class Squeeze2OpInferShape : public SqueezeOpInferShape {
+ public:
+  void operator()(framework::InferShapeContext *ctx) const override {
+    SqueezeOpInferShape::operator()(ctx);
+    PADDLE_ENFORCE(ctx->HasOutput("XShape"),
+                   "Output(XShape) of Squeeze operator should not be null.");
+    const auto &x_dims = ctx->GetInputDim("X");
+    std::vector<int64_t> xshape_dims(x_dims.size() + 1);
+    xshape_dims[0] = 0;
+    for (int i = 0; i < x_dims.size(); ++i) {
+      xshape_dims[i + 1] = x_dims[i];
+    }
+    ctx->SetOutputDim("XShape", framework::make_ddim(xshape_dims));
+    ctx->ShareLoD("X", /*->*/ "XShape");
+  }
+};
+
+class Squeeze2Op : public framework::OperatorBase {
+ public:
+  using OperatorBase::OperatorBase;
+
+ private:
+  void RunImpl(const framework::Scope &scope,
+               const platform::Place &place) const override {
+    auto &axes = Attr<std::vector<int>>("axes");
+    auto x_dims = scope.FindVar(Input("X"))->Get<framework::LoDTensor>().dims();
+    auto out_dims = Squeeze2OpInferShape::GetOutputShape(axes, x_dims);
+
+    framework::AttributeMap attrs;
+    attrs["shape"] = framework::vectorize2int(out_dims);
+    // Invoke Reshape Op
+    auto reshape_op = framework::OpRegistry::CreateOp(
+        "reshape2", {{"X", {Input("X")}}, {"Shape", {}}},
+        {{"Out", {Output("Out")}}, {"XShape", {Output("XShape")}}}, attrs);
+    reshape_op->Run(scope, place);
+  }
+};
+
+class Squeeze2GradOpMaker : public framework::SingleGradOpDescMaker {
+ public:
+  using framework::SingleGradOpDescMaker::SingleGradOpDescMaker;
+
+  std::unique_ptr<framework::OpDesc> Apply() const override {
+    auto *grad_op = new framework::OpDesc();
+    grad_op->SetType("squeeze2_grad");
+    grad_op->SetInput("XShape", Output("XShape"));
+    grad_op->SetInput(framework::GradVarName("Out"), OutputGrad("Out"));
+    grad_op->SetOutput(framework::GradVarName("X"), InputGrad("X"));
+    grad_op->SetAttrMap(Attrs());
+    return std::unique_ptr<framework::OpDesc>(grad_op);
+  }
+};
+
+class Squeeze2GradInferShape : public framework::InferShapeBase {
+ public:
+  void operator()(framework::InferShapeContext *context) const override {
+    PADDLE_ENFORCE(context->HasInput("XShape"),
+                   "Input(XShape) shouldn't be null.");
+    PADDLE_ENFORCE(context->HasInput(framework::GradVarName("Out")),
+                   "Input(Out@GRAD) shouldn't be null.");
+    auto xshape_dims = context->GetInputDim("XShape");
+    auto x_dims = framework::slice_ddim(xshape_dims, 1, xshape_dims.size());
+    context->SetOutputDim(framework::GradVarName("X"), x_dims);
+    context->ShareLoD("XShape", framework::GradVarName("X"));
+  }
+};
+
+class Squeeze2GradOp : public framework::OperatorBase {
+ public:
+  using OperatorBase::OperatorBase;
+
+ private:
+  void RunImpl(const framework::Scope &scope,
+               const platform::Place &place) const override {
+    auto dx_name = Output(framework::GradVarName("X"));
+    auto dout_name = Input(framework::GradVarName("Out"));
+    auto xshape_name = Input("XShape");
+    auto xshape_dims =
+        scope.FindVar(xshape_name)->Get<framework::LoDTensor>().dims();
+    auto x_dims = framework::slice_ddim(xshape_dims, 1, xshape_dims.size());
+
+    framework::AttributeMap attrs;
+    attrs["shape"] = framework::vectorize2int(x_dims);
+
+    auto reshape_op = framework::OpRegistry::CreateOp(
+        "reshape2", {{"X", {dout_name}}, {"Shape", {}}},
+        {{"Out", {dx_name}}, {"XShape", {xshape_name}}}, attrs);
+    reshape_op->Run(scope, place);
+  }
+};
+
 }  // namespace operators
 }  // namespace paddle
 
@@ -192,3 +299,8 @@ REGISTER_OPERATOR(squeeze, ops::SqueezeOp, ops::SqueezeOpMaker,
                   ops::SqueezeOpInferShape,
                   paddle::framework::DefaultGradOpDescMaker<true>);
 REGISTER_OPERATOR(squeeze_grad, ops::SqueezeGradOp, ops::SqueezeGradInferShape);
+
+REGISTER_OPERATOR(squeeze2, ops::Squeeze2Op, ops::Squeeze2OpMaker,
+                  ops::Squeeze2OpInferShape, ops::Squeeze2GradOpMaker);
+REGISTER_OPERATOR(squeeze2_grad, ops::Squeeze2GradOp,
+                  ops::Squeeze2GradInferShape);

paddle/fluid/operators/transpose_op.cc

@@ -13,6 +13,7 @@ See the License for the specific language governing permissions and
 limitations under the License. */
 
 #include "paddle/fluid/operators/transpose_op.h"
+#include <string>
 #include <vector>
 
 namespace paddle {
@@ -24,7 +25,7 @@ class TransposeOp : public framework::OperatorWithKernel {
  public:
   using framework::OperatorWithKernel::OperatorWithKernel;
 
-  void InferShape(framework::InferShapeContext* ctx) const override {
+  void InferShape(framework::InferShapeContext *ctx) const override {
     PADDLE_ENFORCE(ctx->HasInput("X"), "Input(X) should not be null");
     PADDLE_ENFORCE(ctx->HasOutput("Out"), "Output(Out) should not be null");
     auto x_dims = ctx->GetInputDim("X");
@@ -90,7 +91,7 @@ The behavior of this operator is similar to how `numpy.transpose` works.
          2 &5
     \end{pmatrix}$$
 
-- Given a input tensor with shape $(N, C, H, W)$ and the `axes` is 
+- Given a input tensor with shape $(N, C, H, W)$ and the `axes` is
 $[0, 2, 3, 1]$, then shape of the output tensor will be: $(N, H, W, C)$.
 
 )DOC");
@@ -101,7 +102,7 @@ class TransposeOpGrad : public framework::OperatorWithKernel {
  public:
   using framework::OperatorWithKernel::OperatorWithKernel;
 
-  void InferShape(framework::InferShapeContext* ctx) const override {
+  void InferShape(framework::InferShapeContext *ctx) const override {
     PADDLE_ENFORCE(ctx->HasInput("X"), "Input(X) should not be null");
     PADDLE_ENFORCE(ctx->HasInput(framework::GradVarName("Out")),
                    "Input(Out@GRAD) should not be null");
@@ -113,6 +114,93 @@ class TransposeOpGrad : public framework::OperatorWithKernel {
   }
 };
 
+// FIXME(zcd): transpose2 adds an intermediate output(XShape) based on
+// transpose, the XShape is used to carry the shape and lod of X which
+// will be used in transpose_grad, in this way, the framework can reuse
+// the memory of X immediately the transpose2_op is finished.
+// Considering compatibility issues, we could not fix transpose2_op
+class Transpose2Op : public TransposeOp {
+ public:
+  Transpose2Op(const std::string &type,
+               const framework::VariableNameMap &inputs,
+               const framework::VariableNameMap &outputs,
+               const framework::AttributeMap &attrs)
+      : TransposeOp(type, inputs, outputs, attrs) {}
+
+  void InferShape(framework::InferShapeContext *ctx) const override {
+    TransposeOp::InferShape(ctx);
+    PADDLE_ENFORCE(ctx->HasOutput("XShape"),
+                   "Output(XShape) should not be null");
+    const auto &in_dims = ctx->GetInputDim("X");
+    std::vector<int64_t> x_shape_dim(in_dims.size() + 1);
+    x_shape_dim[0] = 0;
+    for (int i = 0; i < in_dims.size(); ++i) {
+      x_shape_dim[i + 1] = in_dims[i];
+    }
+    ctx->SetOutputDim("XShape", framework::make_ddim(x_shape_dim));
+    ctx->ShareLoD("X", /*->*/ "XShape");
+  }
+
+ protected:
+  framework::OpKernelType GetExpectedKernelType(
+      const framework::ExecutionContext &ctx) const override {
+    return framework::OpKernelType(
+        framework::ToDataType(ctx.Input<framework::LoDTensor>("X")->type()),
+        ctx.device_context());
+  }
+};
+
+class Transpose2OpMaker : public TransposeOpMaker {
+ public:
+  void Make() override {
+    TransposeOpMaker::Make();
+    AddOutput("XShape", "(Tensor)The output tensor.").AsIntermediate();
+  }
+};
+
+class Transpose2GradMaker : public framework::SingleGradOpDescMaker {
+ public:
+  using framework::SingleGradOpDescMaker::SingleGradOpDescMaker;
+
+  std::unique_ptr<framework::OpDesc> Apply() const override {
+    auto *grad_op = new framework::OpDesc();
+    grad_op->SetType("transpose2_grad");
+    grad_op->SetInput("XShape", Output("XShape"));
+    grad_op->SetInput(framework::GradVarName("Out"), OutputGrad("Out"));
+    grad_op->SetOutput(framework::GradVarName("X"), InputGrad("X"));
+    grad_op->SetAttrMap(Attrs());
+    return std::unique_ptr<framework::OpDesc>(grad_op);
+  }
+};
+
+class Transpose2OpGrad : public framework::OperatorWithKernel {
+ public:
+  using framework::OperatorWithKernel::OperatorWithKernel;
+
+  void InferShape(framework::InferShapeContext *ctx) const override {
+    PADDLE_ENFORCE(ctx->HasInput("XShape"), "Input(XShape) should not be null");
+    PADDLE_ENFORCE(ctx->HasInput(framework::GradVarName("Out")),
+                   "Input(Out@GRAD) should not be null");
+    if (ctx->HasOutput(framework::GradVarName("X"))) {
+      auto xshape_dim = ctx->GetInputDim("XShape");
+      auto x_shape_dim =
+          framework::slice_ddim(xshape_dim, 1, xshape_dim.size());
+      ctx->SetOutputDim(framework::GradVarName("X"), x_shape_dim);
+      ctx->ShareLoD("XShape", framework::GradVarName("X"));
+    }
+  }
+
+ protected:
+  framework::OpKernelType GetExpectedKernelType(
+      const framework::ExecutionContext &ctx) const override {
+    return framework::OpKernelType(
+        framework::ToDataType(
+            ctx.Input<framework::LoDTensor>(framework::GradVarName("Out"))
+                ->type()),
+        ctx.device_context());
+  }
+};
+
 }  // namespace operators
 }  // namespace paddle
 
@@ -120,8 +208,20 @@ namespace ops = paddle::operators;
 REGISTER_OPERATOR(transpose, ops::TransposeOp, ops::TransposeOpMaker,
                   paddle::framework::DefaultGradOpDescMaker<true>);
 REGISTER_OPERATOR(transpose_grad, ops::TransposeOpGrad);
+
 REGISTER_OP_CPU_KERNEL(
     transpose, ops::TransposeKernel<paddle::platform::CPUDeviceContext, float>);
 REGISTER_OP_CPU_KERNEL(
     transpose_grad,
     ops::TransposeGradKernel<paddle::platform::CPUDeviceContext, float>);
+
+REGISTER_OPERATOR(transpose2, ops::Transpose2Op, ops::Transpose2OpMaker,
+                  ops::Transpose2GradMaker);
+REGISTER_OPERATOR(transpose2_grad, ops::Transpose2OpGrad);
+
+REGISTER_OP_CPU_KERNEL(
+    transpose2,
+    ops::TransposeKernel<paddle::platform::CPUDeviceContext, float>);
+REGISTER_OP_CPU_KERNEL(
+    transpose2_grad,
+    ops::TransposeGradKernel<paddle::platform::CPUDeviceContext, float>);

paddle/fluid/operators/transpose_op.cu.cc

@@ -21,3 +21,10 @@ REGISTER_OP_CUDA_KERNEL(
 REGISTER_OP_CUDA_KERNEL(
     transpose_grad,
     ops::TransposeGradKernel<paddle::platform::CUDADeviceContext, float>);
+
+REGISTER_OP_CUDA_KERNEL(
+    transpose2,
+    ops::TransposeKernel<paddle::platform::CUDADeviceContext, float>);
+REGISTER_OP_CUDA_KERNEL(
+    transpose2_grad,
+    ops::TransposeGradKernel<paddle::platform::CUDADeviceContext, float>);

paddle/fluid/operators/unsqueeze_op.cc

@@ -127,13 +127,13 @@ class UnsqueezeOpMaker : public framework::OpProtoAndCheckerMaker {
         });
     AddComment(R"DOC(
     Unsqueeze Operator.
-    
-    Insert single-dimensional entries to the shape of a tensor. 
-    Takes one required argument axes, a list of dimensions that will be inserted. 
-    Dimension indices in axes are as seen in the output tensor. 
 
-    For example: 
-      Given a tensor such that tensor with shape [3, 4, 5], 
+    Insert single-dimensional entries to the shape of a tensor.
+    Takes one required argument axes, a list of dimensions that will be inserted.
+    Dimension indices in axes are as seen in the output tensor.
+
+    For example:
+      Given a tensor such that tensor with shape [3, 4, 5],
       then Unsqueeze(tensor, axes=[0, 4]) has shape [1, 3, 4, 5, 1]
     )DOC");
   }
@@ -168,6 +168,112 @@ class UnsqueezeGradOp : public framework::OperatorBase {
   }
 };
 
+// FIXME(zcd): unsqueeze2 adds an intermediate output(XShape) based on
+// unsqueeze, the XShape is used to carry the shape and lod of X which
+// will be used in unsqueeze_grad, in this way, the framework can reuse
+// the memory of X immediately the unsqueeze2_op is finished.
+// Considering compatibility issues, we could not fix unsqueeze2_op
+class Unsqueeze2OpInferShape : public UnsqueezeOpInferShape {
+ public:
+  void operator()(framework::InferShapeContext *ctx) const override {
+    UnsqueezeOpInferShape::operator()(ctx);
+    PADDLE_ENFORCE(ctx->HasOutput("XShape"),
+                   "Output(XShape) of Unsqueeze operator should not be null.");
+    const auto &x_dims = ctx->GetInputDim("X");
+    std::vector<int64_t> xshape_dims(x_dims.size() + 1);
+    xshape_dims[0] = 0;
+    for (int i = 0; i < x_dims.size(); ++i) {
+      xshape_dims[i + 1] = x_dims[i];
+    }
+    ctx->SetOutputDim("XShape", framework::make_ddim(xshape_dims));
+    ctx->ShareLoD("X", /*->*/ "XShape");
+  }
+};
+
+class Unsqueeze2OpMaker : public UnsqueezeOpMaker {
+ public:
+  void Make() override {
+    UnsqueezeOpMaker::Make();
+    AddOutput("XShape",
+              "XShape is just used to store the shape and lod of X, which will "
+              "be used in UnsqueezeGradOp.")
+        .AsIntermediate();
+  }
+};
+
+class Unsqueeze2Op : public framework::OperatorBase {
+ public:
+  using OperatorBase::OperatorBase;
+
+ private:
+  void RunImpl(const framework::Scope &scope,
+               const platform::Place &place) const override {
+    auto &axes = Attr<std::vector<int>>("axes");
+    auto x_dims = scope.FindVar(Input("X"))->Get<framework::LoDTensor>().dims();
+    auto out_dims = Unsqueeze2OpInferShape::GetOutputShape(axes, x_dims);
+
+    framework::AttributeMap attrs;
+    attrs["shape"] = framework::vectorize2int(out_dims);
+    // Invoke Reshape op.
+    auto reshape_op = framework::OpRegistry::CreateOp(
+        "reshape2", {{"X", {Input("X")}}, {"Shape", {}}},
+        {{"Out", {Output("Out")}}, {"XShape", {Output("XShape")}}}, attrs);
+    reshape_op->Run(scope, place);
+  }
+};
+
+class Unsqueeze2GradOpMaker : public framework::SingleGradOpDescMaker {
+ public:
+  using framework::SingleGradOpDescMaker::SingleGradOpDescMaker;
+
+  std::unique_ptr<framework::OpDesc> Apply() const override {
+    auto *grad_op = new framework::OpDesc();
+    grad_op->SetType("unsqueeze2_grad");
+    grad_op->SetInput("XShape", Output("XShape"));
+    grad_op->SetInput(framework::GradVarName("Out"), OutputGrad("Out"));
+    grad_op->SetOutput(framework::GradVarName("X"), InputGrad("X"));
+    grad_op->SetAttrMap(Attrs());
+    return std::unique_ptr<framework::OpDesc>(grad_op);
+  }
+};
+
+class Unsqueeze2GradInferShape : public framework::InferShapeBase {
+ public:
+  void operator()(framework::InferShapeContext *context) const override {
+    PADDLE_ENFORCE(context->HasInput("XShape"),
+                   "Input(XShape) shouldn't be null.");
+    PADDLE_ENFORCE(context->HasInput(framework::GradVarName("Out")),
+                   "Input(Out@GRAD) shouldn't be null.");
+    auto xshape_dims = context->GetInputDim("XShape");
+    auto x_dims = framework::slice_ddim(xshape_dims, 1, xshape_dims.size());
+    context->SetOutputDim(framework::GradVarName("X"), x_dims);
+    context->ShareLoD("XShape", framework::GradVarName("X"));
+  }
+};
+
+class Unsqueeze2GradOp : public framework::OperatorBase {
+ public:
+  using OperatorBase::OperatorBase;
+
+ private:
+  void RunImpl(const framework::Scope &scope,
+               const platform::Place &place) const override {
+    auto dx_name = Output(framework::GradVarName("X"));
+    auto dout_name = Input(framework::GradVarName("Out"));
+    auto xshape_name = Input("XShape");
+    auto xshape_dims =
+        scope.FindVar(xshape_name)->Get<framework::LoDTensor>().dims();
+    auto x_dims = framework::slice_ddim(xshape_dims, 1, xshape_dims.size());
+
+    framework::AttributeMap attrs;
+    attrs["shape"] = framework::vectorize2int(x_dims);
+
+    auto reshape_op = framework::OpRegistry::CreateOp(
+        "reshape2", {{"X", {dout_name}}, {"Shape", {}}},
+        {{"Out", {dx_name}}, {"XShape", {xshape_name}}}, attrs);
+    reshape_op->Run(scope, place);
+  }
+};
 }  // namespace operators
 }  // namespace paddle
 
@@ -180,3 +286,8 @@ REGISTER_OPERATOR(unsqueeze, ops::UnsqueezeOp, ops::UnsqueezeOpMaker,
                   paddle::framework::DefaultGradOpDescMaker<true>);
 REGISTER_OPERATOR(unsqueeze_grad, ops::UnsqueezeGradOp,
                   ops::UnsqueezeGradInferShape);
+
+REGISTER_OPERATOR(unsqueeze2, ops::Unsqueeze2Op, ops::Unsqueeze2OpMaker,
+                  ops::Unsqueeze2OpInferShape, ops::Unsqueeze2GradOpMaker);
+REGISTER_OPERATOR(unsqueeze2_grad, ops::Unsqueeze2GradOp,
+                  ops::Unsqueeze2GradInferShape);

paddle/fluid/platform/dynload/dynamic_loader.cc

@@ -121,6 +121,12 @@ static inline void* GetDsoHandleFromSearchPath(const std::string& search_root,
     if (nullptr == dso_handle) {
       LOG(WARNING) << "Failed to find dynamic library: " << dlPath << " ("
                    << dlerror() << ")";
+      if (dlPath.find("nccl") != std::string::npos) {
+        std::cout
+            << "You may need to install 'nccl2' from NVIDIA official website: "
+            << "https://developer.nvidia.com/nccl/nccl-download"
+            << "before install PaddlePaddle" << std::endl;
+      }
       dlPath = dso_name;
       dso_handle = GetDsoHandleFromDefaultPath(dlPath, dynload_flags);
     }

paddle/scripts/paddle_build.sh

@@ -115,6 +115,7 @@ function cmake_gen() {
         -DWITH_FLUID_ONLY=${WITH_FLUID_ONLY:-OFF}
         -DCMAKE_EXPORT_COMPILE_COMMANDS=ON
         -DWITH_CONTRIB=${WITH_CONTRIB:-ON}
+        -DWITH_INFERENCE=${WITH_INFERENCE:-ON}
         -DWITH_ANAKIN=${WITH_ANAKIN:-OFF}
         -DPY_VERSION=${PY_VERSION:-2.7}
     ========================================
@@ -144,6 +145,7 @@ EOF
         -DWITH_FLUID_ONLY=${WITH_FLUID_ONLY:-OFF} \
         -DCMAKE_EXPORT_COMPILE_COMMANDS=ON \
         -DWITH_CONTRIB=${WITH_CONTRIB:-ON} \
+        -DWITH_INFERENCE=${WITH_INFERENCE:-ON} \
         -DWITH_ANAKIN=${WITH_ANAKIN:-OFF} \
         -DPY_VERSION=${PY_VERSION:-2.7}
 }
@@ -498,7 +500,7 @@ EOF
 EOF
 
     if [[ ${WITH_GPU} == "ON"  ]]; then
-        NCCL_DEPS="apt-get install -y --allow-downgrades libnccl2=2.1.2-1+cuda${CUDA_MAJOR} libnccl-dev=2.1.2-1+cuda${CUDA_MAJOR} &&"
+        NCCL_DEPS="apt-get install -y --allow-downgrades libnccl2=2.2.13-1+cuda${CUDA_MAJOR} libnccl-dev=2.2.13-1+cuda${CUDA_MAJOR} &&"
     else
         NCCL_DEPS=""
     fi

python/paddle/dataset/image.py

@@ -104,7 +104,7 @@ def batch_images_from_tar(data_file,
                 pickle.dump(
                     output,
                     open('%s/batch_%d' % (out_path, file_id), 'wb'),
-                    protocol=pickle.HIGHEST_PROTOCOL)
+                    protocol=2)
                 file_id += 1
                 data = []
                 labels = []
@@ -113,9 +113,7 @@ def batch_images_from_tar(data_file,
         output['label'] = labels
         output['data'] = data
         pickle.dump(
-            output,
-            open('%s/batch_%d' % (out_path, file_id), 'wb'),
-            protocol=pickle.HIGHEST_PROTOCOL)
+            output, open('%s/batch_%d' % (out_path, file_id), 'wb'), protocol=2)
 
     with open(meta_file, 'a') as meta:
         for file in os.listdir(out_path):

python/paddle/fluid/layers/nn.py

@@ -4025,10 +4025,12 @@ def transpose(x, perm, name=None):
 
     helper = LayerHelper('transpose', **locals())
     out = helper.create_tmp_variable(x.dtype)
+    x_shape = helper.create_tmp_variable(x.dtype)
     helper.append_op(
-        type='transpose',
+        type='transpose2',
         inputs={'X': [x]},
-        outputs={'Out': [out]},
+        outputs={'Out': [out],
+                 'XShape': [x_shape]},
         attrs={'axis': perm})
     return out
 
@@ -4520,13 +4522,15 @@ def reshape(x, shape, actual_shape=None, act=None, inplace=True, name=None):
                 "Each dimension size given in shape must not be negtive "
                 "except one unknown dimension.")
 
-    helper = LayerHelper("reshape", **locals())
+    helper = LayerHelper("reshape2", **locals())
     out = helper.create_tmp_variable(dtype=x.dtype)
+    x_shape = helper.create_tmp_variable(dtype=x.dtype)
     helper.append_op(
-        type="reshape",
+        type="reshape2",
         inputs=inputs,
         attrs={"shape": shape},
-        outputs={"Out": out})
+        outputs={"Out": out,
+                 "XShape": x_shape})
 
     return helper.append_activation(out)
 
@@ -4570,11 +4574,13 @@ def squeeze(input, axes, name=None):
     """
     helper = LayerHelper("squeeze", **locals())
     out = helper.create_tmp_variable(dtype=input.dtype)
+    x_shape = helper.create_tmp_variable(dtype=input.dtype)
     helper.append_op(
-        type="squeeze",
+        type="squeeze2",
         inputs={"X": input},
         attrs={"axes": axes},
-        outputs={"Out": out})
+        outputs={"Out": out,
+                 "XShape": x_shape})
 
     return out
 
@@ -4605,11 +4611,13 @@ def unsqueeze(input, axes, name=None):
     """
     helper = LayerHelper("unsqueeze", **locals())
     out = helper.create_tmp_variable(dtype=input.dtype)
+    x_shape = helper.create_tmp_variable(dtype=input.dtype)
     helper.append_op(
-        type="unsqueeze",
+        type="unsqueeze2",
         inputs={"X": input},
         attrs={"axes": axes},
-        outputs={"Out": out})
+        outputs={"Out": out,
+                 "XShape": x_shape})
 
     return out
 
@@ -5811,10 +5819,12 @@ def flatten(x, axis=1, name=None):
         raise ValueError("The axis should be a int, and in range [0, rank(x)]")
 
     out = helper.create_tmp_variable(x.dtype)
+    x_shape = helper.create_tmp_variable(x.dtype)
     helper.append_op(
-        type='flatten',
+        type='flatten2',
         inputs={"X": x},
-        outputs={'Out': out},
+        outputs={'Out': out,
+                 'XShape': x_shape},
         attrs={"axis": axis})
     return out
 

python/paddle/fluid/optimizer.py

@@ -897,7 +897,20 @@ class RMSPropOptimizer(Optimizer):
 
         r(w, t) & = \\rho r(w, t-1) + (1 - \\rho)(\\nabla Q_{i}(w))^2
 
-        v(w, t) & = \\beta v(w, t-1) + \\frac{\\eta} {\\sqrt{v(w,t) +
+        v(w, t) & = \\beta v(w, t-1) + \\frac{\\eta} {\\sqrt{r(w,t) +
+            \\epsilon}} \\nabla Q_{i}(w)
+
+        w & = w - v(w, t)
+
+    if centered is True:
+
+    ..  math::
+
+        r(w, t) & = \\rho r(w, t-1) + (1 - \\rho)(\\nabla Q_{i}(w))^2
+
+        g(w, t) & = \\rho g(w, t-1) + (1 - \\rho)\\nabla Q_{i}(w)
+
+        v(w, t) & = \\beta v(w, t-1) + \\frac{\\eta} {\\sqrt{r(w,t) - (g(w, t))^2 +
             \\epsilon}} \\nabla Q_{i}(w)
 
         w & = w - v(w, t)
@@ -915,6 +928,10 @@ class RMSPropOptimizer(Optimizer):
             avoid division by zero, set 1e-6 by default.
         momentum(float): :math:`\\beta` in equation is the momentum term,
             set 0.0 by default.
+        centered(bool): If True, gradients are normalized by the estimated variance of
+            the gradient; if False, by the uncentered second moment. Setting this to
+            True may help with training, but is slightly more expensive in terms of
+            computation and memory. Defaults to False.
 
     Raises:
         ValueError: If learning_rate, rho, epsilon, momentum are None.
@@ -928,12 +945,14 @@ class RMSPropOptimizer(Optimizer):
 
     _momentum_acc_str = "momentum"
     _mean_square_acc_str = "mean_square"
+    _mean_grad_acc_str = "mean_grad"
 
     def __init__(self,
                  learning_rate,
                  rho=0.95,
                  epsilon=1.0e-6,
                  momentum=0.0,
+                 centered=False,
                  **kwargs):
         super(RMSPropOptimizer, self).__init__(
             learning_rate=learning_rate, **kwargs)
@@ -950,6 +969,7 @@ class RMSPropOptimizer(Optimizer):
         self._rho = rho
         self._epsilon = epsilon
         self._momentum = momentum
+        self._centered = centered
 
     def _create_accumulators(self, block, parameters):
         if not isinstance(block, framework.Block):
@@ -958,6 +978,7 @@ class RMSPropOptimizer(Optimizer):
         for p in parameters:
             self._add_accumulator(self._momentum_acc_str, p)
             self._add_accumulator(self._mean_square_acc_str, p)
+            self._add_accumulator(self._mean_grad_acc_str, p)
 
     def _append_optimize_op(self, block, param_and_grad):
         if not isinstance(block, framework.Block):
@@ -967,6 +988,8 @@ class RMSPropOptimizer(Optimizer):
                                              param_and_grad[0])
         mean_square_acc = self._get_accumulator(self._mean_square_acc_str,
                                                 param_and_grad[0])
+        mean_grad_acc = self._get_accumulator(self._mean_grad_acc_str,
+                                              param_and_grad[0])
         rmsprop_op = block.append_op(
             type=self.type,
             inputs={
@@ -974,17 +997,20 @@ class RMSPropOptimizer(Optimizer):
                 "Grad": param_and_grad[1],
                 "Moment": momentum_acc,
                 "MeanSquare": mean_square_acc,
+                "MeanGrad": mean_grad_acc,
                 "LearningRate": self._create_param_lr(param_and_grad),
             },
             outputs={
                 "ParamOut": param_and_grad[0],
                 "MomentOut": momentum_acc,
-                "MeanSquareOut": mean_square_acc
+                "MeanSquareOut": mean_square_acc,
+                "MeanGradOut": mean_grad_acc
             },
             attrs={
                 "epsilon": self._epsilon,
                 "decay": self._rho,
-                "momentum": self._momentum
+                "momentum": self._momentum,
+                "centered": self._centered
             })
 
         return rmsprop_op

python/paddle/fluid/tests/book/high-level-api/fit_a_line/test_fit_a_line.py

@@ -47,14 +47,14 @@ def train_program():
     loss = fluid.layers.square_error_cost(input=y_predict, label=y)
     avg_loss = fluid.layers.mean(loss)
 
-    return avg_loss
+    return [avg_loss, y_predict]
 
 
 def optimizer_func():
     return fluid.optimizer.SGD(learning_rate=0.001)
 
 
-def train(use_cuda, train_program, params_dirname):
+def train(use_cuda, train_program, params_dirname, inference_model_dirname):
     place = fluid.CUDAPlace(0) if use_cuda else fluid.CPUPlace()
 
     trainer = fluid.Trainer(
@@ -74,6 +74,8 @@ def train(use_cuda, train_program, params_dirname):
                 '''
                 if params_dirname is not None:
                     trainer.save_params(params_dirname)
+                    trainer.save_inference_model(inference_model_dirname,
+                                                 ['x'], [1])
                 trainer.stop()
 
     trainer.train(
@@ -99,15 +101,55 @@ def infer(use_cuda, inference_program, params_dirname=None):
     print("infer results: ", results[0])
 
 
+def infer_by_saved_model(use_cuda, save_dirname=None):
+    if save_dirname is None:
+        return
+
+    place = fluid.CUDAPlace(0) if use_cuda else fluid.CPUPlace()
+    exe = fluid.Executor(place)
+
+    inference_scope = fluid.core.Scope()
+    with fluid.scope_guard(inference_scope):
+        # Use fluid.io.load_inference_model to obtain the inference program desc,
+        # the feed_target_names (the names of variables that will be feeded
+        # data using feed operators), and the fetch_targets (variables that
+        # we want to obtain data from using fetch operators).
+        [inference_program, feed_target_names,
+         fetch_targets] = fluid.io.load_inference_model(save_dirname, exe)
+
+        # The input's dimension should be 2-D and the second dim is 13
+        # The input data should be >= 0
+        batch_size = 10
+
+        test_reader = paddle.batch(
+            paddle.dataset.uci_housing.test(), batch_size=batch_size)
+
+        test_data = next(test_reader())
+        test_feat = numpy.array(
+            [data[0] for data in test_data]).astype("float32")
+        test_label = numpy.array(
+            [data[1] for data in test_data]).astype("float32")
+
+        assert feed_target_names[0] == 'x'
+        results = exe.run(inference_program,
+                          feed={feed_target_names[0]: numpy.array(test_feat)},
+                          fetch_list=fetch_targets)
+        print("infer shape: ", results[0].shape)
+        print("infer results: ", results[0])
+        print("ground truth: ", test_label)
+
+
 def main(use_cuda):
     if use_cuda and not fluid.core.is_compiled_with_cuda():
         return
 
     # Directory for saving the trained model
-    params_dirname = "fit_a_line.inference.model"
+    params_dirname = "fit_a_line.model"
+    inference_model_dirname = "fit_a_line.inference_model"
 
-    train(use_cuda, train_program, params_dirname)
+    train(use_cuda, train_program, params_dirname, inference_model_dirname)
     infer(use_cuda, inference_program, params_dirname)
+    infer_by_saved_model(use_cuda, inference_model_dirname)
 
 
 class TestFitALine(unittest.TestCase):

python/paddle/fluid/tests/unittests/dist_transformer.py

@@ -36,6 +36,7 @@ import paddle.fluid as fluid
 import paddle.fluid.layers as layers
 from paddle.fluid import core
 from test_dist_base import TestDistRunnerBase, runtime_main
+import paddle.compat as cpt
 from paddle.compat import long_type
 
 import hashlib
@@ -315,8 +316,9 @@ def pad_batch_data(insts,
     """
     return_list = []
     max_len = max(len(inst) for inst in insts)
-    num_token = reduce(lambda x, y: x + y,
-                       [len(inst) for inst in insts]) if return_num_token else 0
+    num_token = six.moves.reduce(
+        lambda x, y: x + y,
+        [len(inst) for inst in insts]) if return_num_token else 0
     # Any token included in dict can be used to pad, since the paddings' loss
     # will be masked out by weights and make no effect on parameter gradients.
     inst_data = np.array(
@@ -328,7 +330,7 @@ def pad_batch_data(insts,
         return_list += [inst_weight.astype("float32").reshape([-1, 1])]
     else:  # position data
         inst_pos = np.array([
-            range(1, len(inst) + 1) + [0] * (max_len - len(inst))
+            list(range(1, len(inst) + 1)) + [0] * (max_len - len(inst))
             for inst in insts
         ])
         return_list += [inst_pos.astype("int64").reshape([-1, 1])]
@@ -385,10 +387,11 @@ def prepare_batch_input(insts, data_input_names, src_pad_idx, trg_pad_idx,
         return_num_token=True)
 
     data_input_dict = dict(
-        zip(data_input_names, [
-            src_word, src_pos, src_slf_attn_bias, trg_word, trg_pos,
-            trg_slf_attn_bias, trg_src_attn_bias, lbl_word, lbl_weight
-        ]))
+        list(
+            zip(data_input_names, [
+                src_word, src_pos, src_slf_attn_bias, trg_word, trg_pos,
+                trg_slf_attn_bias, trg_src_attn_bias, lbl_word, lbl_weight
+            ])))
     return data_input_dict, np.asarray([num_token], dtype="float32")
 
 
@@ -561,7 +564,7 @@ def train_loop(exe, train_progm, dev_count, sum_cost, avg_cost, lr_scheduler,
                         np.log(TrainTaskConfig.label_smooth_eps / (
                             ModelHyperParams.trg_vocab_size - 1) + 1e-20))
     init = False
-    for pass_id in xrange(TrainTaskConfig.pass_num):
+    for pass_id in six.moves.xrange(TrainTaskConfig.pass_num):
         pass_start_time = time.time()
         for batch_id, data in enumerate(train_data()):
             if batch_id >= 5:
@@ -587,11 +590,11 @@ def train_loop(exe, train_progm, dev_count, sum_cost, avg_cost, lr_scheduler,
                     ModelHyperParams.eos_idx, ModelHyperParams.n_head,
                     ModelHyperParams.d_model)
                 total_num_token += num_token
-                feed_kv_pairs = data_input_dict.items()
+                feed_kv_pairs = list(data_input_dict.items())
                 if TrainTaskConfig.local:
-                    feed_kv_pairs += {
+                    feed_kv_pairs += list({
                         lr_scheduler.learning_rate.name: lr_rate
-                    }.items()
+                    }.items())
                 feed_list.append(dict(feed_kv_pairs))
 
                 if not init:
@@ -873,6 +876,7 @@ class DataReader(object):
 
             f = tarfile.open(fpaths[0], "r")
             for line in f.extractfile(tar_fname):
+                line = cpt.to_text(line)
                 fields = line.strip("\n").split(self._field_delimiter)
                 if (not self._only_src and len(fields) == 2) or (
                         self._only_src and len(fields) == 1):
@@ -882,8 +886,9 @@ class DataReader(object):
                 if not os.path.isfile(fpath):
                     raise IOError("Invalid file: %s" % fpath)
 
-                with open(fpath, "r") as f:
+                with open(fpath, "rb") as f:
                     for line in f:
+                        line = cpt.to_text(line)
                         fields = line.strip("\n").split(self._field_delimiter)
                         if (not self._only_src and len(fields) == 2) or (
                                 self._only_src and len(fields) == 1):
@@ -892,8 +897,9 @@ class DataReader(object):
     @staticmethod
     def load_dict(dict_path, reverse=False):
         word_dict = {}
-        with open(dict_path, "r") as fdict:
+        with open(dict_path, "rb") as fdict:
             for idx, line in enumerate(fdict):
+                line = cpt.to_text(line)
                 if reverse:
                     word_dict[idx] = line.strip("\n")
                 else:
@@ -1034,7 +1040,7 @@ def multi_head_attention(queries,
         # size of the input as the output dimension size.
         return layers.reshape(
             x=trans_x,
-            shape=map(int, [0, 0, trans_x.shape[2] * trans_x.shape[3]]))
+            shape=list(map(int, [0, 0, trans_x.shape[2] * trans_x.shape[3]])))
 
     def scaled_dot_product_attention(q, k, v, attn_bias, d_model, dropout_rate):
         """

python/paddle/fluid/tests/unittests/op_test.py

@@ -249,7 +249,7 @@ class OpTest(unittest.TestCase):
         outs, _ = self._calc_output(place)
         return outs
 
-    def _calc_output(self, place, parallel=False):
+    def _calc_output(self, place, parallel=False, no_check_set=None):
 
         program = Program()
         block = program.global_block()
@@ -273,6 +273,8 @@ class OpTest(unittest.TestCase):
         # if not, fill the fetch_list by the user configured outputs in test.
         if len(fetch_list) == 0:
             for var_name, var in six.iteritems(outputs):
+                if no_check_set is not None and var_name in no_check_set:
+                    continue
                 if isinstance(var, list):
                     for v in var:
                         fetch_list.append(v)
@@ -291,11 +293,17 @@ class OpTest(unittest.TestCase):
                             return_numpy=False)
         return outs, fetch_list
 
-    def check_output_with_place(self, place, atol):
-        outs, fetch_list = self._calc_output(place)
+    def check_output_with_place(self,
+                                place,
+                                atol,
+                                no_check_set=None,
+                                equal_nan=False):
+        outs, fetch_list = self._calc_output(place, no_check_set=no_check_set)
         for out_name, out_dup in Operator.get_op_outputs(self.op_type):
             if out_name not in self.outputs:
                 continue
+            if no_check_set is not None and out_name in no_check_set:
+                continue
 
             def find_actual(target_name, fetch_list):
                 found = [
@@ -321,7 +329,7 @@ class OpTest(unittest.TestCase):
                         if isinstance(expect, tuple) else expect
                     self.assertTrue(
                         np.allclose(
-                            actual_t, expect_t, atol=atol),
+                            actual_t, expect_t, atol=atol, equal_nan=equal_nan),
                         "Output (" + sub_out_name + ") has diff at " +
                         str(place))
                     if isinstance(expect, tuple):
@@ -337,7 +345,7 @@ class OpTest(unittest.TestCase):
                 expect_t = expect[0] if isinstance(expect, tuple) else expect
                 self.assertTrue(
                     np.allclose(
-                        actual_t, expect_t, atol=atol),
+                        actual_t, expect_t, atol=atol, equal_nan=equal_nan),
                     "Output (" + out_name + ") has diff at " + str(place) +
                     "\nExpect " + str(expect_t) + "\n" + "But Got" +
                     str(actual_t))
@@ -360,10 +368,10 @@ class OpTest(unittest.TestCase):
             places.append(core.CUDAPlace(0))
         return places
 
-    def check_output(self, atol=1e-5):
+    def check_output(self, atol=1e-5, no_check_set=None, equal_nan=False):
         places = self._get_places()
         for place in places:
-            self.check_output_with_place(place, atol)
+            self.check_output_with_place(place, atol, no_check_set, equal_nan)
 
     def check_output_customized(self, checker):
         places = self._get_places()

python/paddle/fluid/tests/unittests/test_dist_base.py

@@ -55,6 +55,7 @@ class TestDistRunnerBase(object):
         pserver_prog = t.get_pserver_program(args.current_endpoint)
         startup_prog = t.get_startup_program(args.current_endpoint,
                                              pserver_prog)
+
         place = fluid.CPUPlace()
         exe = fluid.Executor(place)
         exe.run(startup_prog)
@@ -147,6 +148,8 @@ def runtime_main(test_class):
 
 
 import paddle.compat as cpt
+import socket
+from contextlib import closing
 
 
 class TestDistBase(unittest.TestCase):
@@ -156,13 +159,19 @@ class TestDistBase(unittest.TestCase):
     def setUp(self):
         self._trainers = 2
         self._pservers = 2
-        self._ps_endpoints = "127.0.0.1:9123,127.0.0.1:9124"
+        self._ps_endpoints = "127.0.0.1:%s,127.0.0.1:%s" % (
+            self._find_free_port(), self._find_free_port())
         self._python_interp = "python"
         self._sync_mode = True
         self._mem_opt = False
         self._use_reduce = False
         self._setup_config()
 
+    def _find_free_port(self):
+        with closing(socket.socket(socket.AF_INET, socket.SOCK_STREAM)) as s:
+            s.bind(('', 0))
+            return s.getsockname()[1]
+
     def start_pserver(self, model_file, check_error_log):
         ps0_ep, ps1_ep = self._ps_endpoints.split(",")
         ps_cmd = "%s %s --role pserver --endpoints %s --trainer_id 0 --current_endpoint %s --trainers %d --is_dist"

python/paddle/fluid/tests/unittests/test_flatten_op.py

@@ -22,14 +22,17 @@ from op_test import OpTest
 
 class TestFlattenOp(OpTest):
     def setUp(self):
-        self.op_type = "flatten"
+        self.op_type = "flatten2"
         self.init_test_case()
         self.inputs = {"X": np.random.random(self.in_shape).astype("float32")}
         self.init_attrs()
-        self.outputs = {"Out": self.inputs["X"].reshape(self.new_shape)}
+        self.outputs = {
+            "Out": self.inputs["X"].reshape(self.new_shape),
+            "XShape": np.random.random(self.in_shape).astype("float32")
+        }
 
     def test_check_output(self):
-        self.check_output()
+        self.check_output(no_check_set=["XShape"])
 
     def test_check_grad(self):
         self.check_grad(["X"], "Out")

python/paddle/fluid/tests/unittests/test_fusion_lstm_op.py

@@ -53,12 +53,11 @@ class TestFusionLSTMOp(OpTest):
         self.M = 8
         self.D = 16
         self.has_initial_state = False
+        self.use_peepholes = False
         self.is_reverse = False
         self.act_gate = 'sigmoid'
         self.act_cell = 'tanh'
         self.act_cand = 'tanh'
-        self.use_peepholes = False
-        self.use_seq = False
         self.set_conf()
 
         T = sum(self.lod[0])
@@ -108,7 +107,6 @@ class TestFusionLSTMOp(OpTest):
         }
         self.attrs = {
             'use_peepholes': self.use_peepholes,
-            'use_seq': self.use_seq,
             'is_reverse': self.is_reverse,
             'gate_activation': self.act_gate,
             'cell_activation': self.act_cell,
@@ -178,50 +176,18 @@ class TestFusionLSTMOpPeepholesReverse(TestFusionLSTMOp):
         self.is_reverse = True
 
 
-class TestFusionLSTMOpPoopholesBS1(TestFusionLSTMOp):
+class TestFusionLSTMOpPeepholesInitReverse(TestFusionLSTMOp):
     def set_conf(self):
         self.use_peepholes = True
-        self.lod = [[3]]
-        self.D = 16
-
-
-class TestFusionLSTMOpSeqInit(TestFusionLSTMOp):
-    def set_conf(self):
-        self.use_seq = True
-        self.has_initial_state = True
-
-
-class TestFusionLSTMOpSeqReverse(TestFusionLSTMOp):
-    def set_conf(self):
-        self.use_seq = True
-        self.is_reverse = True
-
-
-class TestFusionLSTMOpSeqInitReverse(TestFusionLSTMOp):
-    def set_conf(self):
-        self.use_seq = True
         self.has_initial_state = True
         self.is_reverse = True
 
 
-class TestFusionLSTMOpSeqPeepholes(TestFusionLSTMOp):
+class TestFusionLSTMOpPeepholesBS1(TestFusionLSTMOp):
     def set_conf(self):
-        self.use_seq = True
         self.use_peepholes = True
-
-
-class TestFusionLSTMOpSeqPeepholesInit(TestFusionLSTMOp):
-    def set_conf(self):
-        self.use_seq = True
-        self.use_peepholes = True
-        self.has_initial_state = True
-
-
-class TestFusionLSTMOpSeqPeepholesReverse(TestFusionLSTMOp):
-    def set_conf(self):
-        self.use_seq = True
-        self.use_peepholes = True
-        self.is_reverse = True
+        self.lod = [[2]]
+        self.D = 8
 
 
 if __name__ == '__main__':

python/paddle/fluid/tests/unittests/test_parallel_executor_fetch_feed.py

@@ -85,6 +85,7 @@ class TestFetchOp(unittest.TestCase):
                     assert not math.isnan(np.sum(ret[i])) and \
                            not math.isinf(np.sum(ret[i]))
 
+    @unittest.skip(reason="CI timeout")
     def test_fetch_op(self):
         tst_reader = paddle.batch(flowers.test(use_xmap=False), batch_size=16)
         tst_reader_iter = tst_reader()
@@ -139,6 +140,7 @@ class TestFeedParallel(unittest.TestCase):
             if batch_id == 2:
                 break
 
+    @unittest.skip(reason="CI timeout")
     def test_feed_op(self):
         os.environ['CPU_NUM'] = str(4)
         if core.is_compiled_with_cuda():

python/paddle/fluid/tests/unittests/test_prelu_op.py

@@ -16,6 +16,7 @@ from __future__ import print_function
 
 import unittest
 import numpy as np
+import six
 from op_test import OpTest
 
 
@@ -62,17 +63,20 @@ class PReluTest(OpTest):
 
 
 # TODO(minqiyang): Resume these test cases after fixing Python3 CI job issues
-#  class TestCase1(PReluTest):
-#  def initTestCase(self):
-#  self.attrs = {'mode': "all"}
+if six.PY2:
 
-#  class TestCase2(PReluTest):
-#  def initTestCase(self):
-#  self.attrs = {'mode': "channel"}
+    class TestCase1(PReluTest):
+        def initTestCase(self):
+            self.attrs = {'mode': "all"}
+
+    class TestCase2(PReluTest):
+        def initTestCase(self):
+            self.attrs = {'mode': "channel"}
+
+    class TestCase3(PReluTest):
+        def initTestCase(self):
+            self.attrs = {'mode': "element"}
 
-#  class TestCase3(PReluTest):
-#  def initTestCase(self):
-#  self.attrs = {'mode': "element"}
 
 if __name__ == "__main__":
     unittest.main()

python/paddle/fluid/tests/unittests/test_reshape_op.py

@@ -22,106 +22,39 @@ from op_test import OpTest
 
 class TestReshapeOp(OpTest):
     def setUp(self):
-        ori_shape = (2, 25)
-        new_shape = (5, 10)
-
-        self.op_type = "reshape"
-        self.inputs = {"X": np.random.random(ori_shape).astype("float32")}
-        self.attrs = {"shape": new_shape}
-        self.outputs = {"Out": self.inputs["X"].reshape(new_shape)}
-
-    def test_check_output(self):
-        self.check_output()
-
-    def test_check_grad(self):
-        self.check_grad(["X"], "Out")
-
-
-class TestReshapeOpDimInfer1(OpTest):
-    def setUp(self):
-        ori_shape = (5, 10)
-        new_shape = (5, -1, 5)
-
-        self.op_type = "reshape"
-        self.inputs = {"X": np.random.random(ori_shape).astype("float32")}
-        self.attrs = {"shape": new_shape}
-        self.outputs = {"Out": self.inputs["X"].reshape(self.attrs["shape"])}
-
-    def test_check_output(self):
-        self.check_output()
-
-    def test_check_grad(self):
-        self.check_grad(["X"], "Out")
-
-
-class TestReshapeOpDimInfer2(OpTest):
-    def setUp(self):
-        ori_shape = (2, 2, 6)
-        new_shape = (2, 0, 3, -1)
-        infered_shape = (2, 2, 3, -1)
-
-        self.op_type = "reshape"
-        self.inputs = {"X": np.random.random(ori_shape).astype("float32")}
-        self.attrs = {"shape": new_shape}
-        self.outputs = {"Out": self.inputs["X"].reshape(infered_shape)}
-
-    def test_check_output(self):
-        self.check_output()
-
-    def test_check_grad(self):
-        self.check_grad(["X"], "Out")
-
-
-class TestReshapeOpInplace(OpTest):
-    def setUp(self):
-        ori_shape = (2, 25)
-        new_shape = (5, 10)
-
-        self.op_type = "reshape"
-        self.inputs = {"X": np.random.random(ori_shape).astype("float32")}
-        self.attrs = {"shape": new_shape}
-        self.outputs = {"Out": self.inputs["X"].reshape(new_shape)}
-
-    def test_check_output(self):
-        self.check_output()
-
-    def test_check_grad(self):
-        self.check_grad(["X"], "Out")
-
-
-class TestReshapeOpDimInferInplace1(OpTest):
-    def setUp(self):
-        ori_shape = (5, 10)
-        new_shape = (5, -1, 5)
+        self.init_data()
+        self.op_type = "reshape2"
+        self.inputs = {"X": np.random.random(self.ori_shape).astype("float32")}
+        self.attrs = {"shape": self.new_shape}
+        self.outputs = {
+            "Out": self.inputs["X"].reshape(self.infered_shape),
+            'XShape': np.random.random(self.ori_shape).astype("float32")
+        }
 
-        self.op_type = "reshape"
-        self.inputs = {"X": np.random.random(ori_shape).astype("float32")}
-        self.attrs = {"shape": new_shape}
-        self.outputs = {"Out": self.inputs["X"].reshape(new_shape)}
+    def init_data(self):
+        self.ori_shape = (2, 25)
+        self.new_shape = (5, 10)
+        self.infered_shape = (5, 10)
 
     def test_check_output(self):
-        self.check_output()
+        self.check_output(no_check_set=['XShape'])
 
     def test_check_grad(self):
         self.check_grad(["X"], "Out")
 
 
-class TestReshapeOpDimInferInplace2(OpTest):
-    def setUp(self):
-        ori_shape = (2, 2, 6)
-        new_shape = (2, 0, 3, -1)
-        infered_shape = (2, 2, 3, -1)
-
-        self.op_type = "reshape"
-        self.inputs = {"X": np.random.random(ori_shape).astype("float32")}
-        self.attrs = {"shape": new_shape}
-        self.outputs = {"Out": self.inputs["X"].reshape(infered_shape)}
+class TestReshapeOpDimInfer1(TestReshapeOp):
+    def init_data(self):
+        self.ori_shape = (5, 10)
+        self.new_shape = (5, -1, 5)
+        self.infered_shape = (5, -1, 5)
 
-    def test_check_output(self):
-        self.check_output()
 
-    def test_check_grad(self):
-        self.check_grad(["X"], "Out")
+class TestReshapeOpDimInfer2(TestReshapeOp):
+    def init_data(self):
+        self.ori_shape = (2, 2, 6)
+        self.new_shape = (2, 0, 3, -1)
+        self.infered_shape = (2, 2, 3, -1)
 
 
 class TestReshapeOpWithInputShape(OpTest):
@@ -130,20 +63,23 @@ class TestReshapeOpWithInputShape(OpTest):
         new_shape = (0, -1, 5)
         actual_shape = (2, 3, 5)
 
-        self.op_type = "reshape"
+        self.op_type = "reshape2"
         self.inputs = {
             "X": np.random.random(ori_shape).astype("float32"),
             "Shape": np.array(
                 actual_shape, dtype="int32")
         }
         self.attrs = {"shape": new_shape}
-        self.outputs = {"Out": self.inputs["X"].reshape(actual_shape)}
+        self.outputs = {
+            "Out": self.inputs["X"].reshape(actual_shape),
+            'XShape': np.random.random(ori_shape).astype("float32")
+        }
 
     def test_check_output(self):
-        self.check_output()
+        self.check_output(no_check_set=['XShape'])
 
     def test_check_grad(self):
-        self.check_grad(["X"], "Out")
+        self.check_grad(["X"], "Out", sum_outputs=["Out"])
 
 
 if __name__ == "__main__":

python/paddle/fluid/tests/unittests/test_rmsprop_op.py

@@ -15,90 +15,164 @@
 from __future__ import print_function
 
 import unittest
+
 import numpy as np
-from op_test import OpTest
-
-
-class TestRmspropOp1(OpTest):
-    ''' Test RMSProp with explicit inputs
-    '''
-
-    def setUp(self):
-        self.op_type = "rmsprop"
-
-        param = np.random.random((123, 321)).astype("float32")
-        mean_square = np.random.random((123, 321)).astype("float32")
-        learning_rate = np.array([0.01]).astype("float32")
-        grad = np.random.random((123, 321)).astype("float32")
-        moment = np.zeros((123, 321)).astype("float32")
-
-        epsilon = 1e-6
-        decay = 0.9
-        momentum = 0.0
-
-        self.inputs = {
-            'Param': param,
-            'MeanSquare': mean_square,
-            'LearningRate': learning_rate,
-            'Grad': grad,
-            'Moment': moment,
-        }
-
-        self.attrs = {'epsilon': epsilon, 'decay': decay, 'momentum': momentum}
-
-        ms_out = decay * mean_square + (1 - decay) * grad * grad
-        moment_out = momentum * moment + \
-            learning_rate * grad / np.sqrt(ms_out + epsilon)
-        param_out = param - moment_out
-
-        self.outputs = {
-            'ParamOut': param_out,
-            'MomentOut': moment_out,
-            'MeanSquareOut': ms_out
-        }
-
-    def test_check_output(self):
-        self.check_output()
-
-
-class TestRmspropOp2(OpTest):
-    '''Test RMSProp with default values for attributes
-    '''
-
-    def setUp(self):
-        self.op_type = "rmsprop"
-
-        param = np.random.random((123, 321)).astype("float32")
-        mean_square = np.random.random((123, 321)).astype("float32")
-        learning_rate = np.array([0.01]).astype("float32")
-        grad = np.random.random((123, 321)).astype("float32")
-        moment = np.zeros((123, 321)).astype("float32")
-
-        epsilon = 1.0e-10
-        decay = 0.9
-        momentum = 0.0
-
-        self.inputs = {
-            'Param': param,
-            'MeanSquare': mean_square,
-            'LearningRate': learning_rate,
-            'Grad': grad,
-            'Moment': moment,
-        }
-
-        ms_out = decay * mean_square + (1 - decay) * grad * grad
-        moment_out = momentum * moment + \
-            learning_rate * grad / np.sqrt(ms_out + epsilon)
-        param_out = param - moment_out
-
-        self.outputs = {
-            'ParamOut': param_out,
-            'MomentOut': moment_out,
-            'MeanSquareOut': ms_out
-        }
-
-    def test_check_output(self):
-        self.check_output()
+import paddle.fluid.core as core
+from paddle.fluid.op import Operator
+
+
+class TestBase(unittest.TestCase):
+    def setup(self, centered, epsilon=1e-6):
+        np.random.seed(5)  # fix seed
+
+        self.param_name = "param"
+        self.param = np.random.random((123, 321)).astype("float32")
+
+        self.mean_square_name = "mean_square"
+        self.mean_square = np.random.random((123, 321)).astype("float32")
+
+        self.mean_grad_name = "mean_grad"
+        self.mean_grad = np.random.random((123, 321)).astype("float32")
+
+        self.lr_name = "lr"
+        self.learning_rate = np.array([0.01]).astype("float32")
+
+        self.grad_name = "grad"
+        self.grad = np.random.random((123, 321)).astype("float32")
+
+        self.moment_name = "moment"
+        self.moment = np.zeros((123, 321)).astype("float32")
+
+        self.epsilon = epsilon
+        self.decay = 0.9
+        self.momentum = 0.0
+        self.centered = centered
+
+        self.ms_out = self.decay * self.mean_square + (1 - self.decay
+                                                       ) * self.grad * self.grad
+        if centered:
+            self.mg_out = self.decay * self.mean_grad + (1 - self.decay
+                                                         ) * self.grad
+            self.moment_out = self.momentum * self.moment + \
+                              self.learning_rate * self.grad / np.sqrt(self.ms_out - np.square(self.mg_out) + self.epsilon)
+        else:
+            self.moment_out = self.momentum * self.moment + \
+                              self.learning_rate * self.grad / np.sqrt(self.ms_out + self.epsilon)
+
+        self.param_out = self.param - self.moment_out
+
+    def check(self,
+              actual_t,
+              expect_t,
+              place,
+              out_name,
+              atol=1e-5,
+              equal_nan=False):
+        self.assertTrue(
+            np.allclose(
+                actual_t, expect_t, atol=atol, equal_nan=equal_nan),
+            "Output (" + out_name + ") has diff at " + str(place) + "\nExpect "
+            + str(expect_t) + "\n" + "But Got" + str(actual_t))
+
+
+class TestRmspropOp(TestBase):
+    def check_with_place(self, place, centered, epsilon):
+        self.setup(centered, epsilon)
+        scope = core.Scope()
+
+        # create and initialize Param Variable
+        param = scope.var(self.param_name).get_tensor()
+        param.set(self.param, place)
+
+        mean_square = scope.var(self.mean_square_name).get_tensor()
+        mean_square.set(self.mean_square, place)
+
+        lr = scope.var(self.lr_name).get_tensor()
+        lr.set(self.learning_rate, place)
+
+        grad = scope.var(self.grad_name).get_tensor()
+        grad.set(self.grad, place)
+
+        moment = scope.var(self.moment_name).get_tensor()
+        moment.set(self.moment, place)
+
+        # create and run sgd operator
+
+        if self.centered:
+            mean_grad = scope.var(self.mean_grad_name).get_tensor()
+            mean_grad.set(self.mean_grad, place)
+
+            rmsprop_op = Operator(
+                "rmsprop",
+                Param=self.param_name,
+                Grad=self.grad_name,
+                MeanSquare=self.mean_square_name,
+                MeanGrad=self.mean_grad_name,
+                Moment=self.moment_name,
+                LearningRate=self.lr_name,
+                ParamOut=self.param_name,
+                MeanSquareOut=self.mean_square_name,
+                MomentOut=self.moment_name,
+                MeanGradOut=self.mean_grad_name,
+                epsilon=self.epsilon,
+                decay=self.decay,
+                momentum=self.momentum,
+                centered=True)
+        else:
+            rmsprop_op = Operator(
+                "rmsprop",
+                Param=self.param_name,
+                Grad=self.grad_name,
+                MeanSquare=self.mean_square_name,
+                Moment=self.moment_name,
+                LearningRate=self.lr_name,
+                ParamOut=self.param_name,
+                MeanSquareOut=self.mean_square_name,
+                MomentOut=self.moment_name,
+                epsilon=self.epsilon,
+                decay=self.decay,
+                momentum=self.momentum,
+                centered=False)
+
+        rmsprop_op.run(scope, place)
+
+        atol = 1e-5
+        equal_nan = False
+
+        if self.centered:
+            atol = 1e-3
+            equal_nan = True
+
+        self.check(
+            np.array(mean_square), self.ms_out, place, self.mean_square_name)
+        self.check(
+            np.array(moment),
+            self.moment_out,
+            place,
+            self.moment_name,
+            atol=atol,
+            equal_nan=equal_nan)
+        self.check(
+            np.array(param),
+            self.param_out,
+            place,
+            self.param_name,
+            atol=atol,
+            equal_nan=equal_nan)
+
+        if self.centered:
+            self.check(
+                np.array(mean_grad), self.mg_out, place, self.mean_grad_name)
+
+    def test_rmsprop(self):
+        places = [core.CPUPlace()]
+        if core.is_compiled_with_cuda():
+            places.append(core.CUDAPlace(0))
+        for place in places:
+            self.check_with_place(place, False, 1e-6)
+            self.check_with_place(place, False, 1e-10)
+            self.check_with_place(place, True, 1e-6)
+            self.check_with_place(place, True, 1e-10)
 
 
 if __name__ == "__main__":

python/paddle/fluid/tests/unittests/test_squeeze_op.py

@@ -23,14 +23,17 @@ from op_test import OpTest
 # Correct: General.
 class TestSqueezeOp(OpTest):
     def setUp(self):
-        self.op_type = "squeeze"
+        self.op_type = "squeeze2"
         self.init_test_case()
         self.inputs = {"X": np.random.random(self.ori_shape).astype("float32")}
         self.init_attrs()
-        self.outputs = {"Out": self.inputs["X"].reshape(self.new_shape)}
+        self.outputs = {
+            "Out": self.inputs["X"].reshape(self.new_shape),
+            "XShape": np.random.random(self.ori_shape).astype("float32")
+        }
 
     def test_check_output(self):
-        self.check_output()
+        self.check_output(no_check_set=['XShape'])
 
     def test_check_grad(self):
         self.check_grad(["X"], "Out")

python/paddle/fluid/tests/unittests/test_transpose_op.py

@@ -22,16 +22,19 @@ from op_test import OpTest
 class TestTransposeOp(OpTest):
     def setUp(self):
         self.initTestCase()
-        self.op_type = "transpose"
+        self.op_type = "transpose2"
         self.inputs = {'X': np.random.random(self.shape).astype("float32")}
         self.attrs = {'axis': list(self.axis)}
-        self.outputs = {'Out': self.inputs['X'].transpose(self.axis)}
+        self.outputs = {
+            'XShape': np.random.random(self.shape).astype("float32"),
+            'Out': self.inputs['X'].transpose(self.axis)
+        }
 
     def test_check_output(self):
-        self.check_output()
+        self.check_output(no_check_set=['XShape'])
 
     def test_check_grad(self):
-        self.check_grad(['X'], 'Out')
+        self.check_grad(['X'], 'Out', sum_outputs=['Out'])
 
     def initTestCase(self):
         self.shape = (3, 4)

python/paddle/fluid/tests/unittests/test_unsqueeze_op.py

@@ -24,13 +24,16 @@ from op_test import OpTest
 class TestUnsqueezeOp(OpTest):
     def setUp(self):
         self.init_test_case()
-        self.op_type = "unsqueeze"
+        self.op_type = "unsqueeze2"
         self.inputs = {"X": np.random.random(self.ori_shape).astype("float32")}
         self.init_attrs()
-        self.outputs = {"Out": self.inputs["X"].reshape(self.new_shape)}
+        self.outputs = {
+            "Out": self.inputs["X"].reshape(self.new_shape),
+            "XShape": np.random.random(self.ori_shape).astype("float32")
+        }
 
     def test_check_output(self):
-        self.check_output()
+        self.check_output(no_check_set=["XShape"])
 
     def test_check_grad(self):
         self.check_grad(["X"], "Out")

python/paddle/fluid/trainer.py

@@ -431,6 +431,28 @@ class Trainer(object):
             exe = executor.Executor(self.place)
             io.save_persistables(exe, dirname=param_path)
 
+    def save_inference_model(self, param_path, feeded_var_names,
+                             target_var_indexes):
+        """
+        Save model for cpp inference into :code:`param_path`.
+
+        Args:
+            param_path(str): The path to save parameters.
+            feeded_var_names(list(str)): The name of the vars that you
+                need to feed in before run program.
+            target_var_indexes(list(int)): the index of target var that
+                you need to return in trainer.train_func.
+        Returns:
+            None
+        """
+        with self._prog_and_scope_guard():
+            exe = executor.Executor(self.place)
+            target_vars = [
+                self.train_func_outputs[index] for index in target_var_indexes
+            ]
+            io.save_inference_model(param_path, feeded_var_names, target_vars,
+                                    exe)
+
     @contextlib.contextmanager
     def _prog_and_scope_guard(self):
         with framework.program_guard(

python/paddle/fluid/transpiler/details/program_utils.py

@@ -153,7 +153,7 @@ def block_to_code(block, block_idx):
 
     indent += 1
     # sort all vars
-    all_vars = sorted(block.vars.iteritems(), key=lambda x: x[0])
+    all_vars = sorted(six.iteritems(block.vars), key=lambda x: x[0])
     for var in all_vars:
         print("{}{}".format(get_indent_space(indent), variable_to_code(var[1])))
 

python/paddle/fluid/transpiler/distribute_transpiler.py

@@ -300,7 +300,7 @@ class DistributeTranspiler(object):
             input_deps = grad_name_to_send_dummy_out.values()
             program.global_block().append_op(
                 type="send_barrier",
-                inputs={"X": input_deps},
+                inputs={"X": list(input_deps)},
                 outputs={"Out": send_barrier_out},
                 attrs={
                     "endpoints": pserver_endpoints,
@@ -401,7 +401,7 @@ class DistributeTranspiler(object):
 
         Args:
             recv_vars (list): Variable list to recv for current trainer_id
-            eplist (list): A list of strings indicating 
+            eplist (list): A list of strings indicating
 
         Returns:
             Program: trainer side startup program.
@@ -455,7 +455,7 @@ class DistributeTranspiler(object):
             if len(splited_var) <= 1:
                 continue
             # NOTE: if enable memory optimization, origin vars maybe removed.
-            if startup_program.global_block().vars.has_key(varname):
+            if varname in startup_program.global_block().vars:
                 orig_param = startup_program.global_block().vars[varname]
             else:
                 origin_param_var = self.origin_program.global_block().vars[
@@ -690,7 +690,7 @@ class DistributeTranspiler(object):
 
         Args:
             endpoint (str): current pserver endpoint.
-        
+
         Returns:
             tuple: (main_program, startup_program), of type "Program"
         """
@@ -713,7 +713,7 @@ class DistributeTranspiler(object):
             endpoint (str): current pserver endpoint.
             pserver_program (Program): deprecated, call get_pserver_program first.
             startup_program (Program): deprecated, should pass startup_program
-                when initalizing 
+                when initalizing
 
         Returns:
             Program: parameter server side startup program.