Lines Matching +full:system +full:- +full:on +full:- +full:chip
1 /* -*- Mode: Text -*- */
7 prog-name = "ntpd";
8 prog-title = "set clock via Network Time Protocol daemon";
11 #include ntpdbase-opts.def
14 explain = <<- _END_EXPLAIN
17 doc-section = {
18 ds-type = 'DESCRIPTION';
19 ds-format = 'mdoc';
20 ds-text = <<- _END_PROG_MDOC_DESCRIP
23 utility is an operating system daemon which sets
24 and maintains the system time of day in synchronism with Internet
27 Network Time Protocol (NTP) version 4, as defined by RFC-5905,
29 version 3, as defined by RFC-1305, and versions 1
30 and 2, as defined by RFC-1059 and RFC-1119, respectively.
34 utility does most computations in 64-bit floating point
35 arithmetic and does relatively clumsy 64-bit fixed point operations
49 specify a working, although limited, configuration entirely on the
92 doc-section = {
93 ds-type = 'USAGE';
94 ds-format = 'mdoc';
95 ds-text = <<- _END_MDOC_USAGE
122 time-of-year (TOY) chip to maintain the time during periods when
124 When the machine is booted, the chip is used to
125 initialize the operating system time.
127 synchronized to a NTP server, the operating system corrects the
128 chip from time to time.
131 detects that the time on the host
137 (Reasons for this include there is no TOY chip,
138 or its battery is dead, or that the TOY chip is just of poor quality.)
142 the system log.
146 clock will be set to the server time regardless of the chip time
162 the synchronization distance, which is equal to one-half the
181 on a system with a large intrinsic drift
190 option is included on the command line, the clock will
198 to 500 parts-per-million (PPM) as a consequence of the correctness
199 principles on which the NTP protocol and algorithm design are
206 the system cannot be used for distributed applications that require
211 outside the 128-ms range and an eventual step or slew time
241 to get the system clock close to correct before starting
246 and you still need to set the system time before starting
248 please open a bug report and document what is going on,
260 option on your
268 will effectively "warm-start" and your system's clock will
282 as much time as possible to get the system's clock synchronized and stable.
289 monotonically-increasing time,
291 .Xr ntp-wait 1ntp-waitmdoc
297 .Xr ntp-wait 1ntp-waitmdoc
304 behavior at startup depends on whether the
315 the particular system clock oscillator time and frequency error.
346 However, it can operate in a one-time
351 compute server-client propagation delay correction factors and
428 stopped and run in one-time mode as required.
450 option on the configuration command.
478 on subsequent daemon restarts.
479 .Ss "The huff-n'-puff Filter"
484 delays on the two directions of transmission can be quite large.
490 The huff-n'-puff filter is designed to correct the apparent time
492 It depends on knowledge of the propagation
504 and positive (puff) correction, which depends on the sign of the
516 doc-section = {
517 ds-type = 'FILES';
518 ds-format = 'mdoc';
519 ds-text = <<- _END_MDOC_FILES
520 .Bl -tag -width /etc/ntp.drift -compact
531 doc-section = {
532 ds-type = 'SEE ALSO';
533 ds-format = 'mdoc';
534 ds-text = <<- _END_MDOC_SEE_ALSO
542 comprehensive documentation is available on the world wide web
592 doc-section = {
593 ds-type = 'BUGS';
594 ds-format = 'mdoc';
595 ds-text = <<- _END_MDOC_BUGS
600 larger than might be desirable for an elevated-priority
602 running on a workstation, particularly since many of
609 doc-section = {
610 ds-type = 'NOTES';
611 ds-format = 'mdoc';
612 ds-text = <<- _END_MDOC_NOTES