diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8e7ffe72b5fb846fb55ab8dc4809d87a40cfe06c..ce06c73bdcf92d9eea594450c9db57c37a9a0fd7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -37,6 +37,16 @@ if(WIN32)
     set(CMAKE_STATIC_LINKER_FLAGS  "${CMAKE_STATIC_LINKER_FLAGS} ${PADDLE_LINK_FLAGS}")
     set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} ${PADDLE_LINK_FLAGS}")
     set(CMAKE_EXE_LINKER_FLAGS  "${CMAKE_EXE_LINKER_FLAGS} ${PADDLE_LINK_FLAGS}")
+# else()
+		# set(CMAKE_C_ARCHIVE_CREATE "<CMAKE_AR> --target elf64-x86-64 cr <TARGET> <LINK_FLAGS> <OBJECTS>")
+		# set(CMAKE_C_ARCHIVE_APPEND "<CMAKE_AR> --target elf64-x86-64 r  <TARGET> <LINK_FLAGS> <OBJECTS>")
+		# # set(CMAKE_C_ARCHIVE_FINISH "<CMAKE_RANLIB> --enable-64-bit-archive <TARGET>")
+		# set(CMAKE_CXX_ARCHIVE_CREATE ${CMAKE_C_ARCHIVE_CREATE})
+		# set(CMAKE_CXX_ARCHIVE_APPEND ${CMAKE_C_ARCHIVE_APPEND})
+		# # set(CMAKE_CXX_ARCHIVE_FINISH ${CMAKE_C_ARCHIVE_FINISH})
+		# set(CMAKE_Fortran_ARCHIVE_CREATE ${CMAKE_C_ARCHIVE_CREATE})
+		# set(CMAKE_Fortran_ARCHIVE_APPEND ${CMAKE_C_ARCHIVE_APPEND})
+		# # set(CMAKE_Fortran_ARCHIVE_FINISH ${CMAKE_C_ARCHIVE_FINISH})
 endif(WIN32)
 
 find_package(CUDA QUIET)
diff --git a/paddle/fluid/framework/grad_op_desc_maker.h b/paddle/fluid/framework/grad_op_desc_maker.h
index 9bccb1a32bf63b30351ef4428594691b0eef0b6a..46ebf4051fbd4ad1bbd6182691aee930eb360d84 100644
--- a/paddle/fluid/framework/grad_op_desc_maker.h
+++ b/paddle/fluid/framework/grad_op_desc_maker.h
@@ -55,7 +55,10 @@ class GradOpDescMakerBase {
                    std::back_inserter(ret_val),
                    [this](const std::string& fwd_var_name) -> std::string {
                      auto g_name = GradVarName(fwd_var_name);
-                     if (no_grad_set_.count(g_name)) {
+                     if (no_grad_set_.empty()) {
+                       (*this->grad_to_var_)[g_name] = fwd_var_name;
+                       return g_name;
+                     } else if (no_grad_set_.count(g_name)) {
                        return kEmptyVarName;
                      } else {
                        (*this->grad_to_var_)[g_name] = fwd_var_name;
diff --git a/paddle/fluid/imperative/CMakeLists.txt b/paddle/fluid/imperative/CMakeLists.txt
index ec8dedd605235a2d197e6a313bd589d5b9520cdf..0d116a6495477ca69c10c130e63247a4f6c03b23 100644
--- a/paddle/fluid/imperative/CMakeLists.txt
+++ b/paddle/fluid/imperative/CMakeLists.txt
@@ -2,4 +2,5 @@ if(WITH_PYTHON)
 cc_library(layer SRCS layer.cc DEPS proto_desc operator device_context blas pybind)
 cc_library(tracer SRCS tracer.cc DEPS proto_desc device_context pybind)
 cc_library(engine SRCS engine.cc)
+cc_library(imperative_profiler SRCS profiler.cc)
 endif()
diff --git a/paddle/fluid/imperative/layer.cc b/paddle/fluid/imperative/layer.cc
index 5530823b90f6580692456253b0eb9d0af4e3240b..d7f7967f72596001018f91ecfcc985c1d0920ec2 100644
--- a/paddle/fluid/imperative/layer.cc
+++ b/paddle/fluid/imperative/layer.cc
@@ -239,7 +239,7 @@ std::map<std::string, std::vector<VarBase*>> OpBase::ApplyGrad() {
       VLOG(3) << "apply grad op " << grad_op_desc->Type();
 
       // Allocate tmp grad output variable
-      for (auto it : grad_output_variable_map) {
+      for (const auto& it : grad_output_variable_map) {
         auto& outputs = tmp_grad_outputs[k][it.first];
         outputs.reserve(it.second.size());
         for (size_t i = 0; i < it.second.size(); ++i) {
@@ -273,9 +273,9 @@ std::map<std::string, std::vector<VarBase*>> OpBase::ApplyGrad() {
 
   // Add tmp grad outputs to original grad vars
   for (size_t k = 0; k < grad_output_vars_.size(); ++k) {
-    for (auto it : grad_output_vars_[k]) {
+    for (const auto& it : grad_output_vars_[k]) {
       auto& outputs = tmp_grad_outputs[k][it.first];
-      auto& origin_outputs = it.second;
+      const auto& origin_outputs = it.second;
       PADDLE_ENFORCE_EQ(outputs.size(), origin_outputs.size());
 
       for (size_t i = 0; i < outputs.size(); ++i) {
diff --git a/paddle/fluid/imperative/layer.h b/paddle/fluid/imperative/layer.h
index 618a5b7a03295ce679dc6a88e0eac57069e78b8b..27cb1c84f568867506afc0ca5ce6eb1b28447efe 100644
--- a/paddle/fluid/imperative/layer.h
+++ b/paddle/fluid/imperative/layer.h
@@ -294,17 +294,23 @@ class PYBIND11_HIDDEN OpBase {
 
   void InvokeBackwardHooks();
 
-  void TrackPreOp(const VarBase* inp_var, const std::string& inp_name) {
-    if (inp_var->PreOp() && !inp_var->IsStopGradient()) {
-      VLOG(3) << "add pre op " << inp_var->PreOp()->Type() << " in slot "
-              << inp_name;
-      pre_ops_[inp_name].push_back(inp_var->PreOp());
-      pre_ops_out_idx_[inp_name].push_back(inp_var->PreOpOutIdx());
-    } else {
-      VLOG(3) << "no pre op in slot " << inp_name
-              << " input var stop_gradient: " << inp_var->IsStopGradient();
-      pre_ops_[inp_name].push_back(nullptr);
-      // pre_ops_out_idx_[inp_name].push_back(-1);
+  void TrackPreOp(const std::string& inp_name,
+                  const std::vector<VarBase*>& inputs) {
+    auto& pre_ops_list = pre_ops_[inp_name];
+    pre_ops_list.reserve(inputs.size());
+    auto& pre_ops_out_idx_list = pre_ops_out_idx_[inp_name];
+    for (VarBase* inp_var : inputs) {
+      if (inp_var->PreOp() && !inp_var->IsStopGradient()) {
+        VLOG(3) << "add pre op " << inp_var->PreOp()->Type() << " in slot "
+                << inp_name;
+        pre_ops_list.emplace_back(inp_var->PreOp());
+        pre_ops_out_idx_list.push_back(inp_var->PreOpOutIdx());
+      } else {
+        VLOG(3) << "no pre op in slot " << inp_name
+                << " input var stop_gradient: " << inp_var->IsStopGradient();
+        pre_ops_list.emplace_back(nullptr);
+        // pre_ops_out_idx_list.push_back(-1);
+      }
     }
   }
 
diff --git a/paddle/fluid/imperative/tracer.cc b/paddle/fluid/imperative/tracer.cc
index 7ee92b4d8c46d8814400dbc02847d701005f3d5b..7773a3f8fc3cc94ea0af1851697ed71960729432 100644
--- a/paddle/fluid/imperative/tracer.cc
+++ b/paddle/fluid/imperative/tracer.cc
@@ -23,23 +23,9 @@
 #include "paddle/fluid/platform/device_context.h"
 #include "paddle/fluid/platform/enforce.h"
 
-#ifdef WITH_GPERFTOOLS
-#include "gperftools/profiler.h"
-#endif
-
-DEFINE_string(
-    tracer_profile_fname, "",
-    "Profiler filename for imperative tracer, which generated by gperftools."
-    "Only valid when compiled `WITH_PROFILER=ON`. Empty if disable.");
-
 namespace paddle {
 namespace imperative {
 
-static std::once_flag gTracerProfileOnce;
-#ifdef WITH_GPERFTOOLS
-static bool gTracerProfilerStarted = false;
-#endif
-
 void CreateGradOp(const framework::OpDesc& op_desc,
                   const std::unordered_set<std::string>& no_grad_set,
                   const std::vector<framework::BlockDesc*>& grad_sub_block,
@@ -146,17 +132,6 @@ framework::VariableNameMap CreateOutputVarNameMap(
 }
 
 Tracer::Tracer(framework::BlockDesc* root_block) : root_block_(root_block) {
-  if (!FLAGS_tracer_profile_fname.empty()) {
-    std::call_once(gTracerProfileOnce, [] {
-#ifdef WITH_GPERFTOOLS
-      ProfilerStart(FLAGS_tracer_profile_fname.c_str());
-      gTracerProfilerStarted = true;
-#else
-      LOG(WARNING) << "Paddle is not compiled with gperftools. "
-                      "FLAGS_tracer_profile_fname will be ignored";
-#endif
-    });
-  }
 }
 
 std::set<std::string> Tracer::Trace(OpBase* op, const VarBasePtrMap& inputs,
@@ -164,12 +139,6 @@ std::set<std::string> Tracer::Trace(OpBase* op, const VarBasePtrMap& inputs,
                                     framework::AttributeMap attrs_map,
                                     const platform::Place expected_place,
                                     const bool stop_gradient) {
-#ifdef WITH_GPERFTOOLS
-  if (gTracerProfilerStarted) {
-    ProfilerFlush();
-  }
-#endif
-
   framework::VariableValueMap invars_map;
   framework::VariableValueMap outvars_map;
 
@@ -184,7 +153,6 @@ std::set<std::string> Tracer::Trace(OpBase* op, const VarBasePtrMap& inputs,
                               inp->Name());
 
       invars.emplace_back(inp->var_);
-      op->TrackPreOp(inp, it.first);
       if (!stop_gradient) {
         current_vars_map[inp->Name()] = inp;
       }
@@ -192,6 +160,7 @@ std::set<std::string> Tracer::Trace(OpBase* op, const VarBasePtrMap& inputs,
               << " inited: " << inp->var_->IsInitialized()
               << " stop_grad: " << inp->IsStopGradient();
     }
+    op->TrackPreOp(it.first, it.second);
   }
 
   op->output_vars_ = outputs;
@@ -319,9 +288,7 @@ std::vector<VarBase*> Tracer::PyTrace(OpBase* op,
   std::vector<framework::Variable*> ret_vars =
       PyLayer::Apply(op->forward_id_, inputs);
 
-  for (VarBase* inp : inputs) {
-    op->TrackPreOp(inp, PyLayer::kFwdInp);
-  }
+  op->TrackPreOp(PyLayer::kFwdInp, inputs);
 
   std::vector<VarBase*>& outputs = op->output_vars_[PyLayer::kFwdOut];
   outputs.reserve(ret_vars.size());
diff --git a/paddle/fluid/imperative/tracer.h b/paddle/fluid/imperative/tracer.h
index 7b65d55e9eff1444d84a3fba284ecbb8b47d1733..62d8eecfccf6c5616af00525d6fccd642cda2eb4 100644
--- a/paddle/fluid/imperative/tracer.h
+++ b/paddle/fluid/imperative/tracer.h
@@ -56,6 +56,10 @@ class Tracer {
   std::vector<VarBase*> PyTrace(OpBase* op, const std::vector<VarBase*>& inputs,
                                 bool stop_gradient = false);
 
+  static void StartProfile();
+
+  static void StopProfile();
+
  private:
   platform::Place GetPlace(const VarBasePtrMap& inputs);
 
diff --git a/paddle/fluid/inference/CMakeLists.txt b/paddle/fluid/inference/CMakeLists.txt
index 762640d6d1ce12dff511fc7149e872efa834036c..0d682fc0a5d7dd0c7925ff97fd77c6107a153b08 100644
--- a/paddle/fluid/inference/CMakeLists.txt
+++ b/paddle/fluid/inference/CMakeLists.txt
@@ -29,6 +29,7 @@ endif(WIN32)
 if(WIN32)
   sep_library(paddle_fluid_origin DEPS ${fluid_modules} paddle_fluid_api)
 else(WIN32)
+  #set(CMAKE_C_ARCHIVE_CREATE "<CMAKE_AR> --target elf64-x86-64 cr paddle_fluid_origin ${fluid_modules} paddle_fluid_api")
   cc_library(paddle_fluid_origin DEPS ${fluid_modules} paddle_fluid_api)
 endif(WIN32)
 
@@ -91,5 +92,5 @@ if(WITH_TESTING)
   add_subdirectory(tests/book)
   if(WITH_INFERENCE_API_TEST)
     add_subdirectory(tests/api)
-  endif()  
+  endif()
 endif()
diff --git a/paddle/fluid/pybind/CMakeLists.txt b/paddle/fluid/pybind/CMakeLists.txt
index 4ac5b83c56b114f4e3e4c78710716adc636ebe1d..f1385f57184eceec49b791cf6c89641b098f036a 100644
--- a/paddle/fluid/pybind/CMakeLists.txt
+++ b/paddle/fluid/pybind/CMakeLists.txt
@@ -1,6 +1,6 @@
 set(PYBIND_DEPS pybind python proto_desc memory executor async_executor prune
   feed_fetch_method pass_builder parallel_executor profiler layer scope_pool
-  tracer analysis_predictor)
+  tracer analysis_predictor imperative_profiler)
 
 if(WITH_PYTHON)
   list(APPEND PYBIND_DEPS py_func_op)
diff --git a/paddle/fluid/pybind/pybind.cc b/paddle/fluid/pybind/pybind.cc
index 395093a1f5a60f3f978970d8a7f90416baafff4c..7a6a5b8645d650ad7fb558ba98a60e253589a37d 100644
--- a/paddle/fluid/pybind/pybind.cc
+++ b/paddle/fluid/pybind/pybind.cc
@@ -36,6 +36,7 @@ limitations under the License. */
 #include "paddle/fluid/framework/selected_rows.h"
 #include "paddle/fluid/framework/version.h"
 #include "paddle/fluid/imperative/layer.h"
+#include "paddle/fluid/imperative/profiler.h"
 #include "paddle/fluid/memory/allocation/allocator_strategy.h"
 #include "paddle/fluid/memory/allocation/legacy_allocator.h"
 #include "paddle/fluid/operators/activation_op.h"
@@ -148,6 +149,12 @@ PYBIND11_MODULE(core, m) {
   m.def("print_mem_usage",
         []() { return memory::allocation::GPUMemMonitor.PrintMemUsage(); });
 
+  m.def("start_imperative_profiler",
+        []() { imperative::StartProfile(); });
+
+  m.def("stop_imperative_profiler",
+        []() { imperative::StopProfile(); });
+
   py::class_<imperative::VarBase>(m, "VarBase", R"DOC()DOC")
       .def(
           py::init<const std::string &, paddle::framework::proto::VarType::Type,
diff --git a/python/paddle/fluid/__init__.py b/python/paddle/fluid/__init__.py
index 103c4d3dd067abfc5e7ab75c92aa124f39b1972e..017d482d397eace8a171d7b59875ae9d5c335ea8 100644
--- a/python/paddle/fluid/__init__.py
+++ b/python/paddle/fluid/__init__.py
@@ -132,7 +132,8 @@ def __bootstrap__():
         'allocator_strategy', 'reader_queue_speed_test_mode',
         'print_sub_graph_dir', 'pe_profile_fname', 'warpctc_dir',
         'inner_op_parallelism', 'enable_parallel_graph',
-        'multiple_of_cupti_buffer_size', 'enable_subgraph_optimize'
+        'multiple_of_cupti_buffer_size', 'enable_subgraph_optimize',
+        'tracer_profile_fname'
     ]
     if 'Darwin' not in sysstr:
         read_env_flags.append('use_pinned_memory')
diff --git a/python/paddle/fluid/framework.py b/python/paddle/fluid/framework.py
index 5b9dd8693190d1c9a6a71cc6bc6e6acf2a06aa6f..3fcea010db7ba8e77b5b7a6cf5255ba497917938 100644
--- a/python/paddle/fluid/framework.py
+++ b/python/paddle/fluid/framework.py
@@ -290,6 +290,7 @@ class Variable(object):
                                                 dtype='float32')
     """
 
+    #  @profile
     def __init__(self,
                  block,
                  type=core.VarDesc.VarType.LOD_TENSOR,
@@ -645,6 +646,7 @@ class Operator(object):
         'checkpoint_notify', 'gen_nccl_id'
     }
 
+    #  @profile
     def __init__(self,
                  block,
                  desc,
@@ -1239,6 +1241,7 @@ class Block(object):
         return (item[1] for item in six.iteritems(self.vars)
                 if isinstance(item[1], Parameter))
 
+    #  @profile
     def create_var(self, *args, **kwargs):
         var = Variable(block=self, *args, **kwargs)
         if 'initializer' in kwargs:
@@ -1347,6 +1350,7 @@ class Block(object):
                 initializer(param, self)
         return param
 
+    #  @profile
     def append_op(self, *args, **kwargs):
         """
         Appends a new Operator according to the giving arguments.
diff --git a/python/paddle/fluid/imperative/__init__.py b/python/paddle/fluid/imperative/__init__.py
index 034a11e0a6049c17800c8fd5aab5bc2291320169..7f31ca1b9b70a05d22eca325b38fe2cb5ff15b03 100644
--- a/python/paddle/fluid/imperative/__init__.py
+++ b/python/paddle/fluid/imperative/__init__.py
@@ -26,8 +26,12 @@ from .nn import *
 from . import tracer
 from .tracer import *
 
+from . import profiler
+from .profiler import *
+
 __all__ = []
 __all__ += layers.__all__
 __all__ += base.__all__
 __all__ += nn.__all__
 __all__ += tracer.__all__
+__all__ += profiler.__all__
diff --git a/python/paddle/fluid/imperative/nn.py b/python/paddle/fluid/imperative/nn.py
index bf3f7ce52e8d77fc2920b3bb63ec5b15a98b29b7..07a690e70453b8a0464b09a08e802ff20b25abcc 100644
--- a/python/paddle/fluid/imperative/nn.py
+++ b/python/paddle/fluid/imperative/nn.py
@@ -97,6 +97,7 @@ class Conv2D(layers.Layer):
             dtype=self._dtype,
             is_bias=True)
 
+    #  @profile
     def forward(self, input):
         pre_bias = self._helper.create_variable_for_type_inference(
             dtype=self._dtype)
@@ -169,6 +170,7 @@ class Pool2D(layers.Layer):
         self._exclusive = exclusive
         self._l_type = 'pool2d'
 
+    #  @profile
     def forward(self, input):
         pool_out = self._helper.create_variable_for_type_inference(self._dtype)
 
@@ -229,6 +231,7 @@ class FC(layers.Layer):
         else:
             self._b = None
 
+    #  @profile
     def forward(self, input):
         tmp = self._helper.create_variable_for_type_inference(self._dtype)
         self._helper.append_op(