"update the compute kernel"

paddle/framework/operator.h

@@ -88,7 +88,7 @@ class OperatorBase {
 
   /// Net will call this function to Run an op.
   virtual void Run(const std::shared_ptr<Scope>& scope,
-                   platform::DeviceContext& dev_ctx) const = 0;
+                   const platform::DeviceContext& dev_ctx) const = 0;
 
   // Get a input with argument's name described in `op_proto`
   const std::string& Input(const std::string& name) const;
@@ -113,7 +113,7 @@ class OperatorBase {
 class KernelContext {
  public:
   KernelContext(const OperatorBase* op, const std::shared_ptr<Scope>& scope,
-                platform::DeviceContext& device_context)
+                const platform::DeviceContext& device_context)
       : op_(*op), scope_(scope), device_context_(&device_context) {}
 
   const Variable* Input(int index) const {
@@ -159,7 +159,7 @@ class KernelContext {
 
   const OperatorBase& op_;
   const std::shared_ptr<Scope> scope_;
-  platform::DeviceContext* device_context_;
+  const platform::DeviceContext* device_context_;
 };
 
 class OpKernel {
@@ -213,7 +213,7 @@ class OperatorWithKernel : public OperatorBase {
       std::unordered_map<OpKernelKey, std::unique_ptr<OpKernel>, OpKernelHash>;
 
   void Run(const std::shared_ptr<Scope>& scope,
-           platform::DeviceContext& dev_ctx) const final {
+           const platform::DeviceContext& dev_ctx) const final {
     auto& opKernel = AllOpKernels().at(type_).at(OpKernelKey(dev_ctx));
     opKernel->Compute(KernelContext(this, scope, dev_ctx));
   }

paddle/operators/random_op.cc

@@ -19,7 +19,28 @@
 namespace paddle {
 namespace operators {
 
-class RandomOp : public framework::OperatorWithKernel {
+template <typename T>
+class GaussianRandomOpKernel<platform::CPUPlace, T>
+    : public framework::OpKernel {
+public:
+  void Compute(const framework::KernelContext& context) const override {
+    auto mean = context.op_.GetAttr<T>("mean");
+    auto std = context.op_.GetAttr<T>("std");
+    // auto seed = context.op_.GetAttr<T>("seed");
+    auto* output = context.Output(0)->GetMutable<framework::Tensor>();
+    T* r = output->mutable_data<T>(context.GetPlace());
+    auto ctx =
+        static_cast<const platform::CPUDeviceContext*>(context.device_context_);
+    // generator need to modify context
+    auto g = const_cast<platform::CPUDeviceContext*>(ctx)->RandGenerator();
+    std::normal_distribution<T> distribution(mean, std);
+    for (int i = 0; i < framework::product(output->dims()); ++i) {
+      r[i] = distribution(g);
+    }
+  }
+};
+
+class GaussianRandomOp : public framework::OperatorWithKernel {
 protected:
   void InferShape(
       const std::vector<const framework::Tensor*>& inputs,
@@ -33,20 +54,21 @@ protected:
   }
 };
 
-class RandomOpMaker : public framework::OpProtoAndCheckerMaker {
+class GaussianRandomOpMaker : public framework::OpProtoAndCheckerMaker {
 public:
-  RandomOpMaker(framework::OpProto* proto, framework::OpAttrChecker* op_checker)
+  GaussianRandomOpMaker(framework::OpProto* proto,
+                        framework::OpAttrChecker* op_checker)
       : framework::OpProtoAndCheckerMaker(proto, op_checker) {
     AddAttr<std::vector<int>>("shape", "The shape of matrix to be randomized");
-    AddAttr<float>("seed", "random seed generator.").SetDefault(1337);
+    // AddAttr<float>("seed", "random seed generator.").SetDefault(1337);
     AddAttr<float>("mean", "mean value of random.").SetDefault(.0);
     AddAttr<float>("std", "minimum value of random value")
         .SetDefault(1.0)
         .LargerThan(.0);
     AddOutput("Out", "output matrix of random op");
     AddComment(R"DOC(
-Random Operator fill a matrix in normal distribution.
-The eqution : Out = Random(Shape=(d0, d1, ...), Dtype, mean, std)
+GaussianRandom Operator fill a matrix in normal distribution.
+The eqution : Out = GaussianRandom(Shape=(d0, d1, ...), Dtype, mean, std)
 )DOC");
   }
 };
@@ -54,10 +76,11 @@ The eqution : Out = Random(Shape=(d0, d1, ...), Dtype, mean, std)
 }  // namespace operators
 }  // namespace paddle
 
-REGISTER_OP(random,
-            paddle::operators::RandomOp,
-            paddle::operators::RandomOpMaker);
+REGISTER_OP(gaussian_random,
+            paddle::operators::GaussianRandomOp,
+            paddle::operators::GaussianRandomOpMaker);
 
-typedef paddle::operators::RandomOpKernel<paddle::platform::CPUPlace, float>
-    RandomOpKernel_CPU_float;
-REGISTER_OP_CPU_KERNEL(random, RandomOpKernel_CPU_float);
+typedef paddle::operators::GaussianRandomOpKernel<paddle::platform::CPUPlace,
+                                                  float>
+    GaussianRandomOpKernel_CPU_float;
+REGISTER_OP_CPU_KERNEL(gaussian_random, GaussianRandomOpKernel_CPU_float);

paddle/operators/random_op.cu

 #include "paddle/operators/random_op.h"
 #include "paddle/framework/op_registry.h"
 
+namespace paddle {
+namespace operators {
+  
+template<typename T>
+class GaussianRandomOpKernel<platform::GPUPlace, T> : public framework::OpKernel {
+public:
+  void Compute(const framework::KernelContext& context) const override {
+    auto mean = context.op_.GetAttr<T>("mean");
+    auto std = context.op_.GetAttr<T>("std");
+    auto* output = context.Output(0)->GetMutable<framework::Tensor>();
+    T* r = output->mutable_data<T>(context.GetPlace());
+    auto ctx = static_cast<const platform::GPUDeviceContext*>
+      (context.device_context_);
+    // generator need to modify context 
+    auto g = const_cast<platform::GPUDeviceContext*>(ctx)->RandGenerator();
+    curandGenerateNormal(g, r, framework::product(output->dims()), mean, std);
 
-typedef paddle::operators::RandomOpKernel<paddle::platform::GPUPlace, float>
+  }
+};
+  
+}  // namespace operators
+}  // namespace paddle
+  
+
+typedef paddle::operators::GaussianRandomOpKernel<paddle::platform::GPUPlace, float>
   RandomOpKernel_GPU_float;
 REGISTER_OP_GPU_KERNEL(random, RandomOpKernel_GPU_float);
\ No newline at end of file

paddle/operators/random_op.h

@@ -7,63 +7,10 @@
 namespace paddle {
 namespace operators {
 
-template <typename T>
-bool Gaussian(platform::CPUDeviceContext* ctx,
-              T* output,
-              const int size,
-              const T& mean,
-              const T& std,
-              const T& seed) {
-  auto g = ctx->RandGenerator(seed);
-  std::normal_distribution<T> distribution(mean, std);
-  for (int i = 0; i < size; ++i) {
-    output[i] = distribution(g);
-  }
-  return true;
-}
-
-#ifndef PADDLE_ONLY_CPU
-template <typename T>
-bool Gaussian(platform::CUDADeviceContext* ctx,
-              T* output,
-              const int size,
-              const T& mean,
-              const T& std,
-              const T& seed) {
-  auto g = ctx->RandGenerator(seed);
-  return curandGenerateNormal(g, output, size, mean, std);
-}
-#endif
-
 template <typename Place, typename T>
-class RandomOpKernel : public framework::OpKernel {
+class GaussianRandomOpKernel : public framework::OpKernel {
 public:
-  void Compute(const framework::KernelContext& context) const override {
-    auto mean = context.op_.GetAttr<T>("mean");
-    auto std = context.op_.GetAttr<T>("std");
-    auto seed = context.op_.GetAttr<T>("seed");
-    auto* output = context.Output(0)->GetMutable<framework::Tensor>();
-    auto place = context.GetPlace();
-    if (platform::is_cpu_place(place)) {
-      Gaussian(
-          dynamic_cast<platform::CPUDeviceContext*>(context.device_context_),
-          output->mutable_data<T>(context.GetPlace()),
-          framework::product(output->dims()),
-          mean,
-          std,
-          seed);
-    } else {
-#ifndef PADDLE_ONLY_CPU
-      Gaussian(
-          dynamic_cast<platform::CUDADeviceContext*>(context.device_context_),
-          output->mutable_data<T>(context.GetPlace()),
-          framework::product(output->dims()),
-          mean,
-          std,
-          seed);
-#endif
-    }
-  }
+  void Compute(const framework::KernelContext& context) const override {}
 };
 
 }  // namespace operators

paddle/platform/device_context.h

@@ -21,6 +21,7 @@ limitations under the License. */
 #include "paddle/platform/gpu_info.h"
 #define EIGEN_USE_GPU
 #endif
+#include <chrono>
 #include <memory>
 #include "paddle/platform/place.h"
 #include "unsupported/Eigen/CXX11/Tensor"
@@ -40,7 +41,10 @@ class DeviceContext {
 class CPUDeviceContext : public DeviceContext {
  public:
   typedef std::mt19937 random_generator_type;
-  CPUDeviceContext() { eigen_device_.reset(new Eigen::DefaultDevice()); }
+  CPUDeviceContext() {
+    random_seed_ = std::chrono::system_clock::now().time_since_epoch().count();
+    eigen_device_.reset(new Eigen::DefaultDevice());
+  }
 
   Eigen::DefaultDevice* eigen_device() const { return eigen_device_.get(); }
 
@@ -49,16 +53,15 @@ class CPUDeviceContext : public DeviceContext {
     return retv;
   }
 
-  random_generator_type& RandGenerator(const int seed) {
+  random_generator_type& RandGenerator() {
     if (!rand_generator_) {
-      random_seed_ = seed;
       rand_generator_.reset(new random_generator_type(random_seed_));
     }
     return *rand_generator_.get();
   }
 
  private:
-  int random_seed_;
+  unsigned random_seed_;
   std::unique_ptr<random_generator_type> rand_generator_;
   std::unique_ptr<Eigen::DefaultDevice> eigen_device_;
 };
@@ -81,6 +84,9 @@ class GPUPlaceGuard {
 
 class CUDADeviceContext : public DeviceContext {
  public:
+  CUDADeviceContext() {
+    random_seed_ = std::chrono::system_clock::now().time_since_epoch().count();
+  }
   explicit CUDADeviceContext(const GPUPlace gpu_place) : gpu_place_(gpu_place) {
     GPUPlaceGuard guard(gpu_place_);
     PADDLE_ENFORCE(cudaStreamCreate(&stream_), "cudaStreamCreate failed");
@@ -98,9 +104,8 @@ class CUDADeviceContext : public DeviceContext {
                    "cudaStreamSynchronize failed");
   }
 
-  curandGenerator_t RandGenerator(const int seed) {
+  curandGenerator_t RandGenerator() {
     if (!rand_generator_) {
-      random_seed_ = seed;
       GPUPlaceGuard guard(gpu_place_);
       PADDLE_ENFORCE(paddle::platform::dynload::curandCreateGenerator(
                          &rand_generator_, CURAND_RNG_PSEUDO_DEFAULT),
@@ -177,7 +182,7 @@ class CUDADeviceContext : public DeviceContext {
 
   cudnnHandle_t dnn_handle_{nullptr};
 
-  int random_seed_;
+  unsigned random_seed_;
   curandGenerator_t rand_generator_{nullptr};
 };