taglinefilesource code
pps_jitter231include/linux/timex.hextern long pps_jitter;    /* time dispersion (jitter) (us) */
pps_jitter605kernel/sched.cpps_jitter = MAXTIME;
pps_jitter159kernel/time.clong pps_jitter = MAXTIME;  /* time dispersion (jitter) (us) */
pps_jitter320kernel/time.ctxc.jitter     = pps_jitter;