ntpd.1ntpdman - OpenGrok cross reference for /freebsd/contrib/ntp/ntpd/ntpd.1ntpdman

Lines Matching +full:error +full:- +full:correction
2 .  it 1 an-trap
6 .ds B-Font [CB]
7 .ds I-Font [CI]
8 .ds R-Font [CR]
10 .ds B-Font B
11 .ds I-Font I
12 .ds R-Font R
15 .\" EDIT THIS FILE WITH CAUTION (in-mem file)
17 .\" It has been AutoGen-ed May 25, 2024 at 12:04:07 AM by AutoGen 5.18.16
18 .\" From the definitions ntpd-opts.def
19 .\" and the template file agman-cmd.tpl
21 \f\*[B-Font]ntpd\fP
22 \- NTP daemon program
24 \f\*[B-Font]ntpd\fP
26 [\f\*[B-Font]\-flags\f[]]
27 [\f\*[B-Font]\-flag\f[] [\f\*[I-Font]value\f[]]]
28 [\f\*[B-Font]\-\-option-name\f[][[=| ]\f\*[I-Font]value\f[]]]
35 \f\*[B-Font]ntpd\fP
40 Network Time Protocol (NTP) version 4, as defined by RFC-5905,
42 version 3, as defined by RFC-1305, and versions 1
43 and 2, as defined by RFC-1059 and RFC-1119, respectively.
48 \f\*[B-Font]ntpd\fP
49 utility does most computations in 64-bit floating point
50 arithmetic and does relatively clumsy 64-bit fixed point operations
60 \f\*[B-Font]ntpd\fP
76 \f\*[B-Font]ntpd\fP,
78 \f\*[B-Font]ntpd\fP
84 \f\*[B-Font]\-c\f[]
90 \f\*[B-Font]ntpd\fP
93 \f\*[B-Font]ntpd\fP
104 \f\*[B-Font]ntpd\fP
108 \f\*[B-Font]ntpd\fP
114 .NOP \f\*[B-Font]\-4\f[], \f\*[B-Font]\-\-ipv4\f[]
122 .NOP \f\*[B-Font]\-6\f[], \f\*[B-Font]\-\-ipv6\f[]
130 .NOP \f\*[B-Font]\-a\f[], \f\*[B-Font]\-\-authreq\f[]
139 .NOP \f\*[B-Font]\-A\f[], \f\*[B-Font]\-\-authnoreq\f[]
148 .NOP \f\*[B-Font]\-b\f[], \f\*[B-Font]\-\-bcastsync\f[]
152 .NOP \f\*[B-Font]\-c\f[] \f\*[I-Font]string\f[], \f\*[B-Font]\-\-configfile\f[]=\f\*[I-Font]string\f[]
159 .NOP \f\*[B-Font]\-d\f[], \f\*[B-Font]\-\-debug\-level\f[]
164 .NOP \f\*[B-Font]\-D\f[] \f\*[I-Font]number\f[], \f\*[B-Font]\-\-set\-debug\-level\f[]=\f\*[I-Font]number\f[]
170 .NOP \f\*[B-Font]\-f\f[] \f\*[I-Font]string\f[], \f\*[B-Font]\-\-driftfile\f[]=\f\*[I-Font]string\f[]
182 .NOP \f\*[B-Font]\-g\f[], \f\*[B-Font]\-\-panicgate\f[]
191 \fB-q\fP
193 \fB-x\fP
199 .NOP \f\*[B-Font]\-G\f[], \f\*[B-Font]\-\-force\-step\-once\f[]
200 Step any initial offset correction..
206 This option forces the initial offset correction to be stepped,
213 .NOP \f\*[B-Font]\-i\f[] \f\*[I-Font]string\f[], \f\*[B-Font]\-\-jaildir\f[]=\f\*[I-Font]string\f[]
221 \fB-u\fP
226 \fB--enable-clockctl\fP) or Linux (configure with
227 \fB--enable-linuxcaps\fP) or Solaris (configure with \fB--enable-solarisprivs\fP).
229 .NOP \f\*[B-Font]\-I\f[] \f\*[I-Font]iface\f[], \f\*[B-Font]\-\-interface\f[]=\f\*[I-Font]iface\f[]
239 .NOP \f\*[B-Font]\-k\f[] \f\*[I-Font]string\f[], \f\*[B-Font]\-\-keyfile\f[]=\f\*[I-Font]string\f[]
249 .NOP \f\*[B-Font]\-l\f[] \f\*[I-Font]string\f[], \f\*[B-Font]\-\-logfile\f[]=\f\*[I-Font]string\f[]
258 .NOP \f\*[B-Font]\-L\f[], \f\*[B-Font]\-\-novirtualips\f[]
266 .NOP \f\*[B-Font]\-M\f[], \f\*[B-Font]\-\-modifymmtimer\f[]
273 .NOP \f\*[B-Font]\-n\f[], \f\*[B-Font]\-\-nofork\f[]
276 wait-sync.
279 .NOP \f\*[B-Font]\-N\f[], \f\*[B-Font]\-\-nice\f[]
286 .NOP \f\*[B-Font]\-p\f[] \f\*[I-Font]string\f[], \f\*[B-Font]\-\-pidfile\f[]=\f\*[I-Font]string\f[]
296 .NOP \f\*[B-Font]\-P\f[] \f\*[I-Font]number\f[], \f\*[B-Font]\-\-priority\f[]=\f\*[I-Font]number\f[]
306 .NOP \f\*[B-Font]\-q\f[], \f\*[B-Font]\-\-quit\f[]
309 saveconfigquit, wait-sync.
317 \fB-g\fP
319 \fB-x\fP
323 .NOP \f\*[B-Font]\-r\f[] \f\*[I-Font]string\f[], \f\*[B-Font]\-\-propagationdelay\f[]=\f\*[I-Font]string\f[]
328 .NOP \f\*[B-Font]\-\-saveconfigquit\f[]=\f\*[I-Font]string\f[]
331 quit, wait-sync.
337 .NOP \f\*[B-Font]\-s\f[] \f\*[I-Font]string\f[], \f\*[B-Font]\-\-statsdir\f[]=\f\*[I-Font]string\f[]
345 .NOP \f\*[B-Font]\-t\f[] \f\*[I-Font]tkey\f[], \f\*[B-Font]\-\-trustedkey\f[]=\f\*[I-Font]tkey\f[]
351 .NOP \f\*[B-Font]\-u\f[] \f\*[I-Font]string\f[], \f\*[B-Font]\-\-user\f[]=\f\*[I-Font]string\f[]
358 \fB--enable-clockctl\fP) or Linux (configure with
359 \fB--enable-linuxcaps\fP) or Solaris (configure with \fB--enable-solarisprivs\fP).
361 .NOP \f\*[B-Font]\-U\f[] \f\*[I-Font]number\f[], \f\*[B-Font]\-\-updateinterval\f[]=\f\*[I-Font]number\f[]
370 .NOP \f\*[B-Font]\-\-var\f[]=\f\*[I-Font]nvar\f[]
375 .NOP \f\*[B-Font]\-\-dvar\f[]=\f\*[I-Font]ndvar\f[]
380 .NOP \f\*[B-Font]\-w\f[] \f\*[I-Font]number\f[], \f\*[B-Font]\-\-wait\-sync\f[]=\f\*[I-Font]number\f[]
395 .NOP \f\*[B-Font]\-x\f[], \f\*[B-Font]\-\-slew\f[]
403 \fB-g\fP
405 \fB-q\fP
412 .NOP \f\*[B-Font]\-\-usepcc\f[]
420 .NOP \f\*[B-Font]\-\-pccfreq\f[]=\f\*[I-Font]string\f[]
427 .NOP \f\*[B-Font]\-m\f[], \f\*[B-Font]\-\-mdns\f[]
433 .NOP \f\*[B-Font]\-\&?\f[], \f\*[B-Font]\-\-help\f[]
436 .NOP \f\*[B-Font]\-\&!\f[], \f\*[B-Font]\-\-more-help\f[]
439 .NOP \f\*[B-Font]\-\-version\f[] [{\f\*[I-Font]v|c|n\f[]}]
448   \fBNTPD_<option-name>\fP or \fBNTPD\fP
454 \f\*[B-Font]ntpd\fP
470 \f\*[B-Font]iburst\f[]
472 \f\*[B-Font]server\f[]
480 time-of-year (TOY) chip to maintain the time during periods when
488 \f\*[B-Font]ntpd\fP
491 \f\*[B-Font]ntpd\fP
498 \f\*[B-Font]ntpd\fP
502 \f\*[B-Font]\-g\f[]
509 clock has been set an error greater than 1000s will cause
510 \f\*[B-Font]ntpd\fP
516 \f\*[B-Font]ntpd\fP
522 the synchronization distance, which is equal to one-half the
523 roundtrip delay plus error budget terms, can become very large.
525 \f\*[B-Font]ntpd\fP
532 reduces the false alarm rate where the clock is stepped in error to
541 \f\*[B-Font]ntpd\fP
544 the error might grow to exceed 128 ms,
551 \f\*[B-Font]\-x\f[]
557 \f\*[B-Font]\-x\f[]
560 to 500 parts-per-million (PPM) as a consequence of the correctness
575 outside the 128-ms range and an eventual step or slew time
576 correction is required.
577 If following such a correction the
578 frequency error is so large that the first sample is outside the
580 \f\*[B-Font]ntpd\fP
589 \f\*[B-Font]time.ien.it\f[]
594 \f\*[B-Font]burst\f[]
613 \f\*[B-Font]ntpd\fP,
618 \f\*[B-Font]ntpd\fP.
627 \f\*[B-Font]iburst\f[]
629 \f\*[B-Font]server\f[]
638 will effectively "warm-start" and your system's clock will
646 \f\*[B-Font]\-g\f[]
648 \f\*[B-Font]\-N\f[]
660 \f\*[B-Font]dovecot\f[]
663 monotonically-increasing time,
665 \fCntp-wait\f[]\fR(1ntp-waitmdoc)\f[]
668 \f\*[B-Font]\-v\f[]
671 \fCntp-wait\f[]\fR(1ntp-waitmdoc)\f[]
677 \f\*[B-Font]ntpd\fP
683 contains the latest estimate of clock frequency error.
685 \f\*[B-Font]ntpd\fP
687 \f\*[B-Font]ntpd\fP
689 the particular system clock oscillator time and frequency error.
692 \f\*[B-Font]ntpd\fP
699 \f\*[B-Font]ntpd\fP
701 \f\*[B-Font]ntpd\fP
708 \f\*[B-Font]ntpd\fP
720 However, it can operate in a one-time
725 compute server-client propagation delay correction factors and
734 \f\*[B-Font]ntpd\fP
753 \f\*[B-Font]ntpd\fP
764 processing, error checking or mitigation algorithms of
765 \f\*[B-Font]ntpd\fP.
767 \f\*[B-Font]\-q\f[]
770 \f\*[B-Font]ntpd\fP
776 \f\*[B-Font]iburst\f[]
778 \f\*[B-Font]server\f[]
799 \f\*[B-Font]ntpd\fP
806 \f\*[B-Font]ntpd\fP
808 stopped and run in one-time mode as required.
824 \f\*[B-Font]tinker\f[]
825 \f\*[B-Font]minpoll\f[]
829 \f\*[B-Font]minpoll\f[]
845 However, this assumes the intrinsic clock frequency error
853 error is greater than this, the drift file
856 have to be specially tailored to reduce the residual error below
861 .SS "The huff-n'-puff Filter"
869 step threshold and a step correction can occur during and after the
874 The huff-n'-puff filter is designed to correct the apparent time
888 and positive (puff) correction, which depends on the sign of the
894 \f\*[B-Font]tinker\f[]
896 \f\*[B-Font]huffpuff\f[]
926 libopts had an internal operational error.  Please report
927 it to autogen-users@lists.sourceforge.net.  Thank you.
982 Copyright (C) 1992-2024 The University of Delaware and Network Time Foundation all rights reserved.
986 \f\*[B-Font]ntpd\fP
989 larger than might be desirable for an elevated-priority
990 \f\*[B-Font]ntpd\fP
1004 This manual page was \fIAutoGen\fP-erated from the \fBntpd\fP