unfied memroy cuda operation codes

test.cu

#include <stdio.h>

inline cudaError_t checkCuda(cudaError_t result) {
  if (result != cudaSuccess) {
    printf("CUDA Runtime Error: %s:%d, ", __FILE__, __LINE__);
    printf("Code: %d, message: %s\n", result, cudaGetErrorString(result));
  }
  return result;
}

__global__ void set_kernel(int* g, int* in, const unsigned int size) {
  int index = threadIdx.x + blockIdx.x * blockDim.x;

  //   printf("set_kernel index : %d \n", index);

  if (index < size) {
    // printf("set_kernel index : %d , size: %d \n", index, size);
    g[index] = index;
    printf("set_kernel index : %d, in element: %d \n", index, in[index]);
  }
}

int main() {
  unsigned int size = 10;

  size_t sizes = size * sizeof(int);
  int* gg;
  int* origin;
  cudaMallocManaged(&gg, sizes);
  cudaMallocManaged(&origin, sizes);

  for (int i = 0; i < size; i++) {
    origin[i] = i;
  }

  set_kernel<<<1, 10>>>(gg, origin, size);

  checkCuda(cudaDeviceSynchronize());

  return 0;
}