From 9f1f32aea8d91c0c669021f01c79c66add1f3b57 Mon Sep 17 00:00:00 2001
From: peixu_ren <peixu.ren1@huawei.com>
Date: Sat, 19 Sep 2020 18:22:18 -0400
Subject: [PATCH] Change the convention that random seed is generated at GPU
 back-end

---
 .../kernel_compiler/gpu/cuda_impl/random_op_impl.cu      | 9 ++++++---
 .../kernel_compiler/gpu/cuda_impl/random_op_impl.cuh     | 1 +
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/mindspore/ccsrc/backend/kernel_compiler/gpu/cuda_impl/random_op_impl.cu b/mindspore/ccsrc/backend/kernel_compiler/gpu/cuda_impl/random_op_impl.cu
index 4c88916515..6f6f606c8e 100644
--- a/mindspore/ccsrc/backend/kernel_compiler/gpu/cuda_impl/random_op_impl.cu
+++ b/mindspore/ccsrc/backend/kernel_compiler/gpu/cuda_impl/random_op_impl.cu
@@ -46,12 +46,13 @@ __global__ void UniformRealKernel(int seed, curandState *globalState, T *output,
 template <typename T>
 void StandardNormal(int seed, int seed2, curandState *globalState, T *output, size_t count, cudaStream_t cuda_stream) {
   int RNG_seed = 0;
+  std::random_device rd;
   if (seed2 != 0) {
     RNG_seed = seed2;
   } else if (seed != 0) {
     RNG_seed = seed;
   } else {
-    RNG_seed = time(NULL);
+    RNG_seed = static_cast<int>(rd());
   }
   NormalKernel<<<GET_BLOCKS(count), GET_THREADS, 0, cuda_stream>>>(RNG_seed, globalState, output, count);
   return;
@@ -61,12 +62,13 @@ template <typename T>
 void UniformInt(int seed, int seed2, curandState *globalState, T *input1, size_t input_size_1,
                 T *input2, size_t input_size_2, T *output, size_t count, cudaStream_t cuda_stream) {
   int RNG_seed = 0;
+  std::random_device rd;
   if (seed2 != 0) {
     RNG_seed = seed2;
   } else if (seed != 0) {
     RNG_seed = seed;
   } else {
-    RNG_seed = time(NULL);
+    RNG_seed = static_cast<int>(rd());
   }
   UniformIntKernel<<<GET_BLOCKS(count), GET_THREADS, 0, cuda_stream>>>
                (RNG_seed, globalState, input1, input_size_1, input2, input_size_2, output, count);
@@ -76,12 +78,13 @@ void UniformInt(int seed, int seed2, curandState *globalState, T *input1, size_t
 template <typename T>
 void UniformReal(int seed, int seed2, curandState *globalState, T *output, size_t count, cudaStream_t cuda_stream) {
   int RNG_seed = 0;
+  std::random_device rd;
   if (seed2 != 0) {
     RNG_seed = seed2;
   } else if (seed != 0) {
     RNG_seed = seed;
   } else {
-    RNG_seed = time(NULL);
+    RNG_seed = static_cast<int>(rd());
   }
   UniformRealKernel<<<GET_BLOCKS(count), GET_THREADS, 0, cuda_stream>>>(RNG_seed, globalState, output, count);
   return;
diff --git a/mindspore/ccsrc/backend/kernel_compiler/gpu/cuda_impl/random_op_impl.cuh b/mindspore/ccsrc/backend/kernel_compiler/gpu/cuda_impl/random_op_impl.cuh
index 9c51304bb6..cd778d9bf7 100644
--- a/mindspore/ccsrc/backend/kernel_compiler/gpu/cuda_impl/random_op_impl.cuh
+++ b/mindspore/ccsrc/backend/kernel_compiler/gpu/cuda_impl/random_op_impl.cuh
@@ -18,6 +18,7 @@
 #define MINDSPORE_CCSRC_KERNEL_GPU_CUDA_IMPL_RANDOMOPIMPL_H_
 
 #include <curand_kernel.h>
+#include <random>
 #include "runtime/device/gpu/cuda_common.h"
 
 template <typename T>