#include <cub/cub.cuh>
  
  void a()
  {
      printf("a() called
  ");
  
      cub::DoubleBuffer<unsigned int>     d_keys;
      cub::DoubleBuffer<cub::NullType>    d_values;
      size_t                              temp_storage_bytes = 0;
      cub::DeviceRadixSort::SortPairs(NULL, temp_storage_bytes, d_keys, d_values, 1024);
  }