The driver nrt.ko allows the normal user to lauch some speciali commands for changing scheduling policy and priority and other operations usually only permitted to superusers.

make
sudo make install
sudo make dev
insmod /lib/modules/`uname -r`/misc/nrt.ko

In programs simply put this lines or similar in your source before using the threads

  uid = geteuid();
  if (uid!=0){
    fd=open("/dev/nrt",O_RDWR);
    if (fd<0){
      printf("This SW needs superuser privilegies to run!\n");
      exit(1);
    }
    close(fd);
  }

to set the new permissions.