Add OperatorWithKernel class

* User can register OpKernel to its Ops. The OpKernelMap saved in
  OperatorWithKernel. Each Op which inherits OperatorWithKernel will
  use `OpKernel::Compute` instead of Run.

paddle/CMakeLists.txt

@@ -15,7 +15,6 @@ if(Boost_FOUND)
   add_subdirectory(memory)
   add_subdirectory(platform)
   add_subdirectory(framework)
-  add_subdirectory(operators)
   add_subdirectory(pybind)
 endif()
 

paddle/framework/op_registry_test.cc

 #include "paddle/framework/op_registry.h"
 #include <gtest/gtest.h>
-#include "paddle/framework/operator.h"
-#include "paddle/operators/demo_op.h"
 
 using namespace paddle::framework;
 
 namespace paddle {
 namespace framework {
-class CosineOp : public OperatorWithKernel {
+class CosineOp : public OperatorBase {
  public:
-  void Run(const OpRunContext* context) const override {
-    printf("%s\n", DebugString().c_str());
-  }
+  void Run(const std::shared_ptr<Scope>& scope,
+           const platform::DeviceContext& dev_ctx) const override {}
+  void InferShape(const std::shared_ptr<Scope>& scope) const override {}
 };
 
 class CosineOpProtoAndCheckerMaker : public OpProtoAndCheckerMaker {
@@ -30,12 +28,13 @@ class CosineOpProtoAndCheckerMaker : public OpProtoAndCheckerMaker {
 
 REGISTER_OP(CosineOp, CosineOpProtoAndCheckerMaker, cos_sim)
 
-class MyTestOp : public OperatorWithKernel {
+class MyTestOp : public OperatorBase {
+ public:
+  void InferShape(const std::shared_ptr<Scope>& scope) const override {}
+  void Run(const std::shared_ptr<Scope>& scope,
+           const platform::DeviceContext& dev_ctx) const override {}
+
  public:
-  void Run(const OpRunContext* ctx) const override {
-    printf("%s\n", DebugString().c_str());
-    printf("test_attr = %d\n", ctx->op_->GetAttr<int>("test_attr"));
-  }
 };
 
 class MyTestOpProtoAndCheckerMaker : public OpProtoAndCheckerMaker {
@@ -73,8 +72,8 @@ TEST(OpRegistry, CreateOp) {
   paddle::framework::OperatorBase* op =
       paddle::framework::OpRegistry::CreateOp(op_desc);
   auto scope = std::make_shared<Scope>();
-  auto dev_ctx = DeviceContext();
-  op->Run(scope, &dev_ctx);
+  paddle::platform::CPUDeviceContext dev_ctx;
+  op->Run(scope, dev_ctx);
   float scale_get = op->GetAttr<float>("scale");
   ASSERT_EQ(scale_get, scale);
 }
@@ -116,8 +115,8 @@ TEST(OpRegistry, DefaultValue) {
   paddle::framework::OperatorBase* op =
       paddle::framework::OpRegistry::CreateOp(op_desc);
   auto scope = std::make_shared<Scope>();
-  auto dev_ctx = DeviceContext();
-  op->Run(scope, &dev_ctx);
+  paddle::platform::CPUDeviceContext dev_ctx;
+  op->Run(scope, dev_ctx);
   ASSERT_EQ(op->GetAttr<float>("scale"), 1.0);
 }
 
@@ -169,9 +168,9 @@ TEST(OpRegistry, CustomChecker) {
   attr->set_i(4);
   paddle::framework::OperatorBase* op =
       paddle::framework::OpRegistry::CreateOp(op_desc);
-  auto dev_ctx = DeviceContext();
+  paddle::platform::CPUDeviceContext dev_ctx;
   auto scope = std::make_shared<Scope>();
-  op->Run(scope, &dev_ctx);
+  op->Run(scope, dev_ctx);
   int test_attr = op->GetAttr<int>("test_attr");
   ASSERT_EQ(test_attr, 4);
 }

paddle/framework/operator.cc

@@ -39,13 +39,5 @@ std::string OperatorBase::DebugString() const {
   return ss.str();
 }
 
-const Variable* OpRunContext::Input(int index) const {
-  return scope_->GetVariable(op_->inputs_[index]);
-}
-
-Variable* OpRunContext::Output(int index) const {
-  return scope_->GetVariable(op_->outputs_[index]);
-}
-
 }  // namespace framework
 }  // namespace paddle
\ No newline at end of file

paddle/framework/operator.h

@@ -14,44 +14,22 @@ limitations under the License. */
 
 #pragma once
 
+#include <paddle/framework/attr_checker.h>
+#include <paddle/framework/op_desc.pb.h>
+#include <paddle/framework/scope.h>
+#include <paddle/platform/device_context.h>
+#include <paddle/platform/place.h>
+#include <paddle/utils/Error.h>
 #include <boost/variant.hpp>
 #include <string>
 #include <unordered_map>
 #include <vector>
 
-#include "paddle/framework/attr_checker.h"
-#include "paddle/framework/op_desc.pb.h"
-#include "paddle/framework/scope.h"
-#include "paddle/utils/Error.h"
-
 namespace paddle {
 namespace framework {
 
 class OperatorBase;
 
-class DeviceContext {};
-
-/**
- * OpRunContext is the only parameter of Operator's Run function.
- * Run will get input/output variables, state such as momentum and
- * device resource such as CUDA stream, cublas handle, etc. from
- * OpRunContext. User should construct it before run the Operator.
- */
-class OpRunContext {
- public:
-  OpRunContext(const OperatorBase* op, const std::shared_ptr<Scope> scope,
-               const DeviceContext* device_context)
-      : op_(op), scope_(scope), device_context_(device_context) {}
-
-  const Variable* Input(int index) const;
-  Variable* Output(int index) const;
-
- public:
-  const OperatorBase* op_;
-  const std::shared_ptr<Scope> scope_;
-  const DeviceContext* device_context_;
-};
-
 /**
  * OperatorBase has the basic element that Net will call to do computation.
  * Only CreateOperator from OpRegistry will new Operator directly. User
@@ -77,7 +55,10 @@ class OperatorBase {
 
   /// Net will call this function to Run an op.
   virtual void Run(const std::shared_ptr<Scope>& scope,
-                   const DeviceContext* dev_ctx) const = 0;
+                   const platform::DeviceContext& dev_ctx) const = 0;
+
+ protected:
+  std::string Type() const { return desc_.type(); }
 
  public:
   OpDesc desc_;
@@ -86,22 +67,84 @@ class OperatorBase {
   AttributeMap attrs_;
 };
 
+class OpKernel {
+ public:
+  /**
+   * KernelContext is the only parameter of Kernel Run function.
+   * Run will get input/output variables, state such as momentum and
+   * device resource such as CUDA stream, cublas handle, etc. from
+   * KernelContext. User should construct it before run the Operator.
+   */
+  class KernelContext {
+   public:
+    KernelContext(const OperatorBase* op, const std::shared_ptr<Scope>& scope,
+                  const platform::DeviceContext& device_context)
+        : op_(*op), scope_(scope), device_context_(device_context) {}
+
+    const Variable* Input(int index) const {
+      return scope_->GetVariable(op_.inputs_[index]);
+    }
+
+    Variable* Output(int index) const {
+      return scope_->GetVariable(op_.outputs_[index]);
+    }
+
+    const OperatorBase& op_;
+    const std::shared_ptr<Scope>& scope_;
+    const platform::DeviceContext& device_context_;
+  };
+
+  virtual void Compute(const KernelContext& context) const = 0;
+
+  virtual ~OpKernel() {}
+};
+
 class OperatorWithKernel : public OperatorBase {
  public:
-  virtual ~OperatorWithKernel() {}
+  struct OpKernelKey {
+    platform::Place place_;
 
-  virtual void InferShape(const std::shared_ptr<Scope>& scope) const {}
+    OpKernelKey() = default;
+    OpKernelKey(const platform::DeviceContext& dev_ctx) {
+      place_ = dev_ctx.GetPlace();
+    }
+
+    bool operator==(const OpKernelKey& o) const { return place_ == o.place_; }
+  };
+
+  struct OpKernelHash {
+    std::hash<bool> hash_;
+    size_t operator()(const OpKernelKey& key) const {
+      return hash_(platform::is_gpu_place(key.place_));
+    }
+  };
+
+  using OpKernelMap =
+      std::unordered_map<OpKernelKey, std::unique_ptr<OpKernel>, OpKernelHash>;
 
   void Run(const std::shared_ptr<Scope>& scope,
-           const DeviceContext* dev_ctx) const {
-    OpRunContext op_ctx(this, scope, dev_ctx);
-    Run(&op_ctx);
+           const platform::DeviceContext& dev_ctx) const final {
+    auto& opKernel = AllOpKernels().at(Type()).at(OpKernelKey(dev_ctx));
+    opKernel->Compute(OpKernel::KernelContext(this, scope, dev_ctx));
   }
 
-  /// when implement an Op, your should implement this function.
-  /// this function should be moved to OpKernel later
-  virtual void Run(const OpRunContext* context) const = 0;
+  static std::unordered_map<std::string /* op_type */, OpKernelMap>&
+  AllOpKernels() {
+    static std::unordered_map<std::string, OpKernelMap> g_all_op_kernels;
+    return g_all_op_kernels;
+  };
 };
 
 }  // namespace framework
 }  // namespace paddle
+
+#define REGISTER_OP_KERNEL(type, PlaceType, KernelType)                   \
+  struct __op_kernel_register__##type##__ {                               \
+    __op_kernel_register__##type##__() {                                  \
+      ::paddle::framework::OperatorWithKernel::OpKernelKey key;           \
+      key.place_ = PlaceType();                                           \
+      ::paddle::framework::OperatorWithKernel::AllOpKernels()[#type][key] \
+          .reset(new KernelType());                                       \
+    }                                                                     \
+  };                                                                      \
+  static __op_kernel_register__##type##__ __reg_kernel_##type##__

paddle/framework/operator_test.cc

@@ -19,17 +19,15 @@ limitations under the License. */
 namespace paddle {
 namespace framework {
 
-class OperatorTest : public OperatorWithKernel {
+class OperatorTest : public OperatorBase {
  public:
-  void Run(const OpRunContext* ctx) const override {
-    float scale = ctx->op_->GetAttr<float>("scale");
-    PADDLE_ENFORCE(ctx->Input(0) == nullptr, "Input(0) should not initialized");
-    PADDLE_ENFORCE(ctx->Output(0) == nullptr,
-                   "Output(1) should not initialized");
-    auto output1 = ctx->scope_->CreateVariable("output1");
-    PADDLE_ENFORCE(output1 != nullptr, "should create output1 from scope");
-    printf("get attr %s = %f\n", "scale", scale);
-    printf("%s\n", DebugString().c_str());
+  void InferShape(const std::shared_ptr<Scope>& scope) const override {}
+  void Run(const std::shared_ptr<Scope>& scope,
+           const platform::DeviceContext& dev_ctx) const override {
+    float scale = GetAttr<float>("scale");
+    ASSERT_NEAR(scale, 3.14, 1e-5);
+    ASSERT_EQ(scope->GetVariable(inputs_[0]), nullptr);
+    ASSERT_NE(scope->GetVariable(outputs_[0]), nullptr);
   }
 };
 
@@ -49,31 +47,26 @@ class OperatorTestProtoAndCheckerMaker : public OpProtoAndCheckerMaker {
 
 REGISTER_OP(OperatorTest, OperatorTestProtoAndCheckerMaker, test_operator)
 
-TEST(OperatorBase, DebugString) {
+TEST(OperatorBase, all) {
   OpDesc op_desc;
   op_desc.set_type("test_operator");
-  std::vector<std::string> inputs = {"IN1", "IN2"};
-  for (auto& input : inputs) {
-    op_desc.add_inputs(input);
-  }
-  std::vector<std::string> outputs = {"OUT1", "OUT2"};
-  for (auto& output : outputs) {
-    op_desc.add_outputs(output);
-  }
+  *op_desc.mutable_inputs()->Add() = "IN1";
+  *op_desc.mutable_outputs()->Add() = "OUT1";
   auto attr = op_desc.mutable_attrs()->Add();
   attr->set_name("scale");
   attr->set_type(paddle::framework::AttrType::FLOAT);
   float scale = 3.14;
   attr->set_f(scale);
 
-  DeviceContext device_context;
+  platform::CPUDeviceContext device_context;
   auto scope = std::make_shared<Scope>();
 
   OperatorBase* op = paddle::framework::OpRegistry::CreateOp(op_desc);
-  ASSERT_EQ(op->inputs_, inputs);
-  ASSERT_EQ(op->outputs_, outputs);
   ASSERT_EQ(op->GetAttr<float>("scale"), scale);
-  op->Run(scope, &device_context);
+  scope->CreateVariable("OUT1");
+  op->Run(scope, device_context);
+  std::cout << op->DebugString() << std::endl;
+  delete op;
 }
 
 }  // namespace framework

paddle/operators/.clang-format

----
-Language:        Cpp
-BasedOnStyle:  Google
-Standard:  Cpp11 
-...

paddle/operators/demo_op.h

-#pragma once
-
-#include "paddle/framework/op_registry.h"
-
-using namespace paddle::framework;
-
-namespace paddle {
-namespace operators {
-
-class CosineOp : public OperatorWithKernel {
- public:
-  void Run(const OpRunContext *context) const override {
-    printf("%s\n", DebugString().c_str());
-  }
-};
-
-class CosineOpProtoAndCheckerMaker : public OpProtoAndCheckerMaker {
- public:
-  CosineOpProtoAndCheckerMaker(OpProto *proto, OpAttrChecker *op_checker)
-      : OpProtoAndCheckerMaker(proto, op_checker) {
-    AddInput("input", "input of cosine op");
-    AddOutput("output", "output of cosine op");
-    AddAttr<float>("scale", "scale of cosine op")
-        .SetDefault(1.0)
-        .LargerThan(0.0);
-    AddType("cos");
-    AddComment("This is cos op");
-  }
-};
-
-REGISTER_OP(CosineOp, CosineOpProtoAndCheckerMaker, cos_sim)
-
-class MyTestOp : public OperatorWithKernel {
- public:
-  void Run(const OpRunContext *context) const override {
-    printf("%s\n", DebugString().c_str());
-  }
-};
-
-class MyTestOpProtoAndCheckerMaker : public OpProtoAndCheckerMaker {
- public:
-  MyTestOpProtoAndCheckerMaker(OpProto *proto, OpAttrChecker *op_checker)
-      : OpProtoAndCheckerMaker(proto, op_checker) {
-    AddInput("input", "input of cosine op");
-    AddOutput("output", "output of cosine op");
-    auto my_checker = [](int i) {
-      PADDLE_ENFORCE(i % 2 == 0, "'test_attr' must be even!");
-    };
-    AddAttr<int>("test_attr", "a simple test attribute")
-        .AddCustomChecker(my_checker);
-    AddType("my_test_op");
-    AddComment("This is my_test op");
-  }
-};
-
-REGISTER_OP(MyTestOp, MyTestOpProtoAndCheckerMaker, my_test_op)
-
-}  // namespace operators
-}  // namespace operators

paddle/platform/device_context.h

@@ -22,8 +22,8 @@ limitations under the License. */
 #include "paddle/platform/dynload/curand.h"
 #define EIGEN_USE_GPU
 #endif
-#include "paddle/platform/place.h"
-#include "unsupported/Eigen/CXX11/Tensor"
+#include <paddle/platform/place.h>
+#include <unsupported/Eigen/CXX11/Tensor>
 
 namespace paddle {
 namespace platform {
@@ -31,9 +31,16 @@ namespace platform {
 class DeviceContext {
  public:
   virtual ~DeviceContext() {}
+  virtual Place GetPlace() const = 0;
 };
 
-class CPUDeviceContext : public DeviceContext {};
+class CPUDeviceContext : public DeviceContext {
+ public:
+  Place GetPlace() const override {
+    Place retv = CPUPlace();
+    return retv;
+  }
+};
 
 #ifndef PADDLE_ONLY_CPU
 
@@ -61,6 +68,11 @@ class CUDADeviceContext : public DeviceContext {
     eigen_device_ = new Eigen::GpuDevice(eigen_stream_);
   }
 
+  Place GetPlace() const override {
+    Place retv = GPUPlace();
+    return retv;
+  }
+
   void Wait() {
     paddle::platform::throw_on_error(cudaStreamSynchronize(stream_),
                                      "cudaStreamSynchronize failed");