   /* if the array was not completely filled (i.e., the sum of rweights is
    * less than 100 due to truncated), then use last address to fill the rest */
   unsigned int last_insert =
         t > 0 ? dset->rwlist[t - 1] : (unsigned int)(dset->nr - 1);
   for(j = t; j < 100; j++)
      dset->rwlist[j] = last_insert;

   /* shuffle the content of the array in order to mix the selection
    * of the addresses (e.g., if first address has weight=20, avoid
    * sending first 20 calls to it, but ensure that within a 100 calls,
    * 20 go to first address */
   shuffle_uint100array(dset->rwlist);
   lock_release(&dset->lock);
   return 0;
}