+ /* calculate run_time in nsec*/
+ do_posix_clock_monotonic_gettime(&uptime);
+ run_time = (u64)uptime.tv_sec*NSEC_PER_SEC + uptime.tv_nsec;
+ run_time -= (u64)current->start_time.tv_sec*NSEC_PER_SEC
+ + current->start_time.tv_nsec;
+ /* convert nsec -> AHZ */
+ elapsed = nsec_to_AHZ(run_time);