Merge branch 'develop' of github.com:baidu/Paddle into feature/implenment_infer_var_type

paddle/framework/backward.cc

@@ -28,15 +28,15 @@ namespace paddle {
 namespace framework {
 
 static inline std::unique_ptr<OperatorBase> CreateGradOp(
-    const OperatorBase& op,
-    const std::unordered_set<std::string>& no_grad_set) {
+    const OperatorBase& op, const std::unordered_set<std::string>& no_grad_set,
+    std::unordered_map<std::string, std::string>* grad_to_var) {
   OpDescBind op_desc;
   op_desc.SetInputMap(op.Inputs());
   op_desc.SetOutputMap(op.Outputs());
   op_desc.SetType(op.Type());
   op_desc.SetAttrMap(op.Attrs());
   auto& info = OpInfoMap::Instance().Get(op.Type());
-  auto grad_descs = info.GradOpMaker()(op_desc, no_grad_set);
+  auto grad_descs = info.GradOpMaker()(op_desc, no_grad_set, grad_to_var);
   std::vector<std::unique_ptr<OperatorBase>> grad_ops;
   grad_ops.reserve(grad_descs.size());
   std::transform(grad_descs.begin(), grad_descs.end(),
@@ -99,7 +99,9 @@ static std::unique_ptr<OperatorBase> NOP() {
 //  See Backward.h for details
 static std::unique_ptr<OperatorBase> BackwardRecursive(
     const OperatorBase& forwardOp,
-    std::unordered_set<std::string>& no_grad_names, size_t& uniq_id) {
+    std::unordered_set<std::string>& no_grad_names,
+    std::unordered_map<std::string, std::string>* grad_to_var,
+    size_t& uniq_id) {
   //  If all input gradients of forwarding operator do not need to calculate,
   //  just return an NOP. Not return null ptr because NOP does not take
   //  too much time for calculation, but it is useful for simplifying logic.
@@ -137,7 +139,7 @@ static std::unique_ptr<OperatorBase> BackwardRecursive(
     for (auto it = forwardNet.ops_.rbegin(); it != forwardNet.ops_.rend();
          ++it, ++local_op_id) {
       auto& fwd = *it;
-      auto bwd = BackwardRecursive(*fwd, no_grad_names, uniq_id);
+      auto bwd = BackwardRecursive(*fwd, no_grad_names, grad_to_var, uniq_id);
       ForEachVarName(bwd->Outputs(),
                      [&dup_output_ops, local_op_id](const std::string& out) {
                        dup_output_ops[out].emplace_back(local_op_id);
@@ -189,7 +191,7 @@ static std::unique_ptr<OperatorBase> BackwardRecursive(
     }
   } else {
     std::unique_ptr<OperatorBase> grad_op(
-        CreateGradOp(forwardOp, no_grad_names));
+        CreateGradOp(forwardOp, no_grad_names, grad_to_var));
 
     ForEachVarName(grad_op->Inputs(), [&no_grad_names, &net, &grad_op](
                                           const std::string& grad_input) {
@@ -228,7 +230,7 @@ static std::unique_ptr<OperatorBase> BackwardRecursive(
           *static_cast<const OperatorBase*>(&rnnop.stepnet());
       // create stepnet's gradient op
       rnn_grad_op->set_stepnet(
-          BackwardRecursive(stepnet_op, no_grad_names, uniq_id));
+          BackwardRecursive(stepnet_op, no_grad_names, grad_to_var, uniq_id));
     }
 
     if (net->ops_.empty()) {  // Current no aux op is added to network
@@ -255,7 +257,8 @@ std::unique_ptr<OperatorBase> Backward(
     no_grad_names.insert(name + kGradVarSuffix);
   }
   size_t uid = 0;
-  return BackwardRecursive(forwardOp, no_grad_names, uid);
+  std::unordered_map<std::string, std::string> grad_to_var;
+  return BackwardRecursive(forwardOp, no_grad_names, &grad_to_var, uid);
 }
 
 // ====================================  //
@@ -272,30 +275,31 @@ static bool AllGradInSet(const std::vector<std::string>& names,
 
 std::vector<std::unique_ptr<OpDescBind>> MakeOpGrad(
     const std::unique_ptr<OpDescBind>& op_desc,
-    std::unordered_set<std::string>& no_grad_vars) {
+    std::unordered_set<std::string>* no_grad_vars,
+    std::unordered_map<std::string, std::string>* grad_to_var) {
   std::vector<std::unique_ptr<OpDescBind>> grad_op_descs;
   // All input gradients of forwarding operator do not need to calculate.
   const std::vector<std::string>& inputs = op_desc->InputArgumentNames();
-  if (AllGradInSet(inputs, no_grad_vars)) {
+  if (AllGradInSet(inputs, *no_grad_vars)) {
     return grad_op_descs;  // empty vector
   }
   // All output gradients of forwarding operator do not need to calculate.
   const std::vector<std::string>& outputs = op_desc->OutputArgumentNames();
-  if (AllGradInSet(outputs, no_grad_vars)) {
+  if (AllGradInSet(outputs, *no_grad_vars)) {
     for (const std::string& name : inputs) {
-      no_grad_vars.insert(GradVarName(name));
+      no_grad_vars->insert(GradVarName(name));
     }
     return grad_op_descs;  // empty vector
   }
 
   grad_op_descs = OpInfoMap::Instance()
                       .Get(op_desc->Type())
-                      .GradOpMaker()(*op_desc, no_grad_vars);
+                      .GradOpMaker()(*op_desc, *no_grad_vars, grad_to_var);
 
   std::list<std::unique_ptr<OpDescBind>> pending_fill_zeros_ops;
   for (auto& desc : grad_op_descs) {
     for (const std::string& in_name : desc->InputArgumentNames()) {
-      if (no_grad_vars.count(in_name)) {
+      if (no_grad_vars->count(in_name)) {
         std::string prefix = in_name.substr(
             0, in_name.size() - sizeof(kGradVarSuffix) / sizeof(char) + 1);
         std::string new_name = prefix + kZeroVarSuffix;
@@ -315,7 +319,8 @@ std::vector<std::unique_ptr<OpDescBind>> MakeOpGrad(
 
 std::vector<std::unique_ptr<OpDescBind>> MakeBlockBackward(
     ProgramDescBind& program_desc, int block_idx,
-    std::unordered_set<std::string>& no_grad_vars) {
+    std::unordered_set<std::string>* no_grad_vars,
+    std::unordered_map<std::string, std::string>* grad_to_var) {
   BlockDescBind* cur_block = program_desc.Block(block_idx);
   std::deque<std::unique_ptr<OpDescBind>>& op_descs = cur_block->ops_;
   std::unordered_map<std::string, std::vector<size_t>> dup_out_ops;
@@ -323,15 +328,15 @@ std::vector<std::unique_ptr<OpDescBind>> MakeBlockBackward(
   std::vector<std::unique_ptr<OpDescBind>> backward_descs;
   for (auto it = op_descs.rbegin(); it != op_descs.rend(); ++it) {
     std::vector<std::unique_ptr<OpDescBind>> op_grads =
-        MakeOpGrad(*it, no_grad_vars);
+        MakeOpGrad(*it, no_grad_vars, grad_to_var);
 
     if ((*it)->Type() == "recurrent") {
       PADDLE_ENFORCE_EQ(
           op_grads.size(), size_t(1),
           "rnn_op's gradient process should contain only one op.");
       int step_block_idx = (*it)->GetBlockAttr("stop_block");
-      auto backward_block_op_descs =
-          MakeBlockBackward(program_desc, step_block_idx, no_grad_vars);
+      auto backward_block_op_descs = MakeBlockBackward(
+          program_desc, step_block_idx, no_grad_vars, grad_to_var);
       BlockDescBind* backward_block = program_desc.AppendBlock(*cur_block);
       for (auto& ptr : backward_block_op_descs) {
         backward_block->ops_.push_back(std::move(ptr));
@@ -387,8 +392,9 @@ void AppendBackward(ProgramDescBind& program_desc,
     no_grad_var_names.insert(GradVarName(name));
   }
   const int root_block_idx = 0;
-  auto backward_op_descs =
-      MakeBlockBackward(program_desc, root_block_idx, no_grad_var_names);
+  std::unordered_map<std::string, std::string> grad_to_var;
+  auto backward_op_descs = MakeBlockBackward(program_desc, root_block_idx,
+                                             &no_grad_var_names, &grad_to_var);
   auto& forw_op_descs = program_desc.Block(root_block_idx)->ops_;
   for (auto& ptr : backward_op_descs) {
     forw_op_descs.push_back(std::move(ptr));

paddle/framework/block_desc.cc

@@ -66,7 +66,7 @@ std::vector<OpDescBind *> BlockDescBind::AllOps() const {
   return res;
 }
 
-void BlockDescBind::Sync() {
+void BlockDescBind::Flush() {
   if (need_update_) {
     auto &op_field = *this->desc_->mutable_ops();
     op_field.Clear();
@@ -91,5 +91,10 @@ BlockDescBind *BlockDescBind::ParentBlock() const {
   return prog_->Block(static_cast<size_t>(this->desc_->parent_idx()));
 }
 
+BlockDesc *BlockDescBind::Proto() {
+  Flush();
+  return desc_;
+}
+
 }  // namespace framework
 }  // namespace paddle

paddle/framework/block_desc.h

@@ -35,7 +35,8 @@ class BlockDescBind {
  public:
   friend std::vector<std::unique_ptr<OpDescBind>> MakeBlockBackward(
       ProgramDescBind &program_desc, int block_idx,
-      std::unordered_set<std::string> &no_grad_vars);
+      std::unordered_set<std::string> *no_grad_vars,
+      std::unordered_map<std::string, std::string> *grad_to_var);
 
   friend void AppendBackward(
       ProgramDescBind &program_desc,
@@ -64,9 +65,9 @@ class BlockDescBind {
 
   std::vector<OpDescBind *> AllOps() const;
 
-  void Sync();
+  void Flush();
 
-  BlockDesc *RawPtr() { return desc_; }
+  BlockDesc *Proto();
 
  private:
   ProgramDescBind *prog_;  // not_own

paddle/framework/details/op_registry.h

@@ -103,8 +103,9 @@ struct OpInfoFiller<T, kGradOpDescMaker> {
   void operator()(const char* op_type, OpInfo* info) const {
     info->grad_op_maker_ = [](
         const OpDescBind& fwd_op,
-        const std::unordered_set<std::string>& no_grad_set) {
-      T maker(fwd_op, no_grad_set);
+        const std::unordered_set<std::string>& no_grad_set,
+        std::unordered_map<std::string, std::string>* grad_to_var) {
+      T maker(fwd_op, no_grad_set, grad_to_var);
       return maker();
     };
   }

paddle/framework/grad_op_desc_maker.h

@@ -25,8 +25,9 @@ class GradOpDescMakerBase {
  public:
   explicit GradOpDescMakerBase(
       const OpDescBind& fwd_op,
-      const std::unordered_set<std::string>& no_grad_set)
-      : fwd_op_(fwd_op), no_grad_set_(no_grad_set) {}
+      const std::unordered_set<std::string>& no_grad_set,
+      std::unordered_map<std::string, std::string>* grad_to_var)
+      : fwd_op_(fwd_op), no_grad_set_(no_grad_set), grad_to_var_(grad_to_var) {}
 
   virtual ~GradOpDescMakerBase() = default;
   virtual std::vector<std::unique_ptr<OpDescBind>> operator()() const = 0;
@@ -37,11 +38,16 @@ class GradOpDescMakerBase {
     std::vector<std::string> ret_val;
     auto var_names = this->Input(name);
     ret_val.reserve(var_names.size());
-    std::transform(
-        var_names.begin(), var_names.end(), std::back_inserter(ret_val),
+    std::transform(var_names.begin(), var_names.end(),
+                   std::back_inserter(ret_val),
                    [this](const std::string& fwd_var_name) -> std::string {
                      auto g_name = GradVarName(fwd_var_name);
-          return no_grad_set_.count(g_name) == 0 ? g_name : kEmptyVarName;
+                     if (no_grad_set_.count(g_name)) {
+                       return kEmptyVarName;
+                     } else {
+                       (*this->grad_to_var_)[g_name] = fwd_var_name;
+                       return g_name;
+                     }
                    });
     if (!drop_empty_grad) {
       return ret_val;
@@ -95,6 +101,7 @@ class GradOpDescMakerBase {
  private:
   const OpDescBind& fwd_op_;
   const std::unordered_set<std::string>& no_grad_set_;
+  std::unordered_map<std::string, std::string>* grad_to_var_;
 };
 
 class SingleGradOpDescMaker : public GradOpDescMakerBase {

paddle/framework/op_desc.cc

@@ -32,7 +32,7 @@ OpDescBind::OpDescBind(const std::string &type, const VariableNameMap &inputs,
 }
 
 OpDesc *OpDescBind::Proto() {
-  Sync();
+  Flush();
   return &op_desc_;
 }
 
@@ -101,7 +101,7 @@ void OpDescBind::SetAttr(const std::string &name, const Attribute &v) {
 }
 
 void OpDescBind::SetBlockAttr(const std::string &name, BlockDescBind &block) {
-  BlockDesc *desc = block.RawPtr();
+  BlockDesc *desc = block.Proto();
   this->attrs_[name] = desc;
   need_update_ = true;
 }
@@ -165,7 +165,7 @@ struct SetAttrDescVisitor : public boost::static_visitor<void> {
   void operator()(boost::blank) const { PADDLE_THROW("Unexpected branch"); }
 };
 
-void OpDescBind::Sync() {
+void OpDescBind::Flush() {
   if (need_update_) {
     this->op_desc_.mutable_inputs()->Clear();
     for (auto &ipt : inputs_) {

paddle/framework/op_desc.h

@@ -89,8 +89,6 @@ class OpDescBind {
     this->need_update_ = true;
   }
 
-  void Sync();
-
   const VariableNameMap &Inputs() const { return inputs_; }
 
   const VariableNameMap &Outputs() const { return outputs_; }
@@ -106,6 +104,8 @@ class OpDescBind {
 
   void InferVarType(BlockDescBind *block) const;
 
+  void Flush();
+
  private:
   template <typename MapType>
   static std::vector<typename MapType::key_type> MapKeys(const MapType &map) {

paddle/framework/program_desc.cc

@@ -45,7 +45,7 @@ BlockDescBind *ProgramDescBind::AppendBlock(const BlockDescBind &parent) {
 
 ProgramDesc *ProgramDescBind::Proto() {
   for (auto &block : blocks_) {
-    block->Sync();
+    block->Flush();
   }
   return prog_;
 }

paddle/framework/type_defs.h

@@ -43,7 +43,8 @@ using OpCreator = std::function<OperatorBase*(
     const VariableNameMap& /*outputs*/, const AttributeMap& /*attrs*/)>;
 
 using GradOpMakerFN = std::function<std::vector<std::unique_ptr<OpDescBind>>(
-    const OpDescBind&, const std::unordered_set<std::string>& /*no_grad_set*/)>;
+    const OpDescBind&, const std::unordered_set<std::string>& /*no_grad_set*/,
+    std::unordered_map<std::string, std::string>* /*grad_to_var*/)>;
 
 using InferVarTypeFN = std::function<void(const OpDescBind& /*op_desc*/,
                                           BlockDescBind* /*block*/)>;

paddle/pybind/protobuf.cc

@@ -123,7 +123,18 @@ void BindProgramDesc(py::module &m) {
              AppendBackward(program_desc, no_grad_vars);
            })
       .def("block", &ProgramDescBind::Block, py::return_value_policy::reference)
-      .def("num_blocks", &ProgramDescBind::Size);
+      .def("num_blocks", &ProgramDescBind::Size)
+      .def("serialize_to_string",
+           [](ProgramDescBind &program_desc) -> py::bytes {
+             const ProgramDesc *desc = program_desc.Proto();
+             PADDLE_ENFORCE(desc->IsInitialized(),
+                            "ProgramDesc has not been initialized.");
+             std::string res;
+             PADDLE_ENFORCE(
+                 desc->SerializeToString(&res),
+                 "Serialize ProgramDesc Error. This could be a bug of Paddle.");
+             return res;
+           });
 }
 
 void BindBlockDesc(py::module &m) {
@@ -149,7 +160,17 @@ void BindBlockDesc(py::module &m) {
       .def("all_vars", &BlockDescBind::AllVars,
            py::return_value_policy::reference)
       .def("all_ops", &BlockDescBind::AllOps,
-           py::return_value_policy::reference);
+           py::return_value_policy::reference)
+      .def("serialize_to_string", [](BlockDescBind &block_desc) -> py::bytes {
+        const BlockDesc *desc = block_desc.Proto();
+        PADDLE_ENFORCE(desc->IsInitialized(),
+                       "BlockDesc has not been initialized.");
+        std::string res;
+        PADDLE_ENFORCE(
+            desc->SerializeToString(&res),
+            "Serialize BlockDesc Error. This could be a bug of Paddle.");
+        return res;
+      });
 }
 
 void BindVarDsec(py::module &m) {
@@ -177,7 +198,17 @@ void BindVarDsec(py::module &m) {
       .def("lod_level", &VarDescBind::GetLodLevel)
       .def("set_lod_level", &VarDescBind::SetLoDLevel)
       .def("type", &VarDescBind::GetType)
-      .def("set_type", &VarDescBind::SetType);
+      .def("set_type", &VarDescBind::SetType)
+      .def("serialize_to_string", [](VarDescBind &var_desc) -> py::bytes {
+        const VarDesc *desc = var_desc.Proto();
+        PADDLE_ENFORCE(desc->IsInitialized(),
+                       "VarDesc has not been initialized.");
+        std::string res;
+        PADDLE_ENFORCE(
+            desc->SerializeToString(&res),
+            "Serialize VarDesc Error. This could be a bug of Paddle.");
+        return res;
+      });
 
   py::enum_<VarDesc::VarType>(var_desc, "VarType", "")
       .value("LOD_TENSOR", VarDesc::LOD_TENSOR)
@@ -213,7 +244,17 @@ void BindOpDesc(py::module &m) {
       .def("set_block_attr", &OpDescBind::SetBlockAttr)
       .def("block_attr", &OpDescBind::GetBlockAttr)
       .def("check_attrs", &OpDescBind::CheckAttrs)
-      .def("infer_shape", &OpDescBind::InferShape);
+      .def("infer_shape", &OpDescBind::InferShape)
+      .def("serialize_to_string", [](OpDescBind &op_desc) -> py::bytes {
+        const OpDesc *desc = op_desc.Proto();
+        PADDLE_ENFORCE(desc->IsInitialized(),
+                       "OpDesc has not been initialized.");
+        std::string res;
+        PADDLE_ENFORCE(
+            desc->SerializeToString(&res),
+            "Serialize OpDesc Error. This could be a bug of Paddle.");
+        return res;
+      });
 }
 
 }  // namespace pybind

python/paddle/v2/framework/framework.py

@@ -73,6 +73,13 @@ class Variable(object):
         self.block.vars[name] = self
         self.op = None
 
+    def __str__(self):
+        protostr = self.desc.serialize_to_string()
+        proto = framework_pb2.VarDesc.FromString(str(protostr))
+        return proto.__str__()
+
+    __repr__ = __str__
+
     @property
     def name(self):
         return self.desc.name()
@@ -210,6 +217,13 @@ class Operator(object):
         self.desc.check_attrs()
         self.desc.infer_shape(self.block.desc)
 
+    def __str__(self):
+        protostr = self.desc.serialize_to_string()
+        proto = framework_pb2.OpDesc.FromString(str(protostr))
+        return proto.__str__()
+
+    __repr__ = __str__
+
     @property
     def type(self):
         return self.desc.type()
@@ -252,6 +266,13 @@ class Block(object):
         self.ops = collections.deque()  # operator list
         self.program = program
 
+    def __str__(self):
+        protostr = self.desc.serialize_to_string()
+        proto = framework_pb2.BlockDesc.FromString(str(protostr))
+        return proto.__str__()
+
+    __repr__ = __str__
+
     @property
     def parent_idx(self):
         return self.desc.parent
@@ -296,6 +317,13 @@ class Program(object):
         self.blocks = [Block(self, 0)]
         self.current_block_idx = 0
 
+    def __str__(self):
+        protostr = self.desc.serialize_to_string()
+        proto = framework_pb2.ProgramDesc.FromString(str(protostr))
+        return proto.__str__()
+
+    __repr__ = __str__
+
     def global_block(self):
         return self.blocks[0]
 

python/paddle/v2/framework/tests/test_operator_desc.py

@@ -34,6 +34,8 @@ class TestOperator(unittest.TestCase):
                     "Y": mul_y},
             outputs={"Out": [mul_out]},
             attrs={"x_num_col_dims": 1})
+
+        self.assertNotEqual(str(mul_op), "")
         self.assertEqual(mul_op.type, "mul")
         self.assertEqual(mul_op.input_names, ["X", "Y"])
         self.assertEqual(mul_op.input("X"), ["mul.x"])

python/paddle/v2/framework/tests/test_variable.py

@@ -21,6 +21,7 @@ class TestVariable(unittest.TestCase):
         b = g_program.current_block()
         w = b.create_var(
             dtype="float64", shape=[784, 100], lod_level=0, name="fc.w")
+        self.assertNotEqual(str(w), "")
         self.assertEqual(core.DataType.FP64, w.data_type)
         self.assertEqual((784, 100), w.shape)
         self.assertEqual("fc.w", w.name)