On 2014-06-28 22:08, Carlos E. R. wrote:
On 2014-06-28 21:41, James Knott wrote:
It's exact to the second on my machine, as far I can visually see. If
NTP is correctly setup, I would trust it more than a clock displayed in
a web page.
A rough time check can be done on this email headers:
At my machine:
Received: from localhost (localhost [127.0.0.1])
by Telcontar.valinor (Postfix)
for ; Sat, 28 Jun 2014 22:08:15 +0200 (CEST)
at my ISP:
Received: from Telcontar.valinor (79.150.228.90) by smtp.movistar.es
Sat, 28 Jun 2014 20:08:16 +0000
at openSUSE:
Received: from smtp.movistar.es
by mx2.suse.de (Postfix)
Sat, 28 Jun 2014 20:08:17 +0000 (UTC)
Ok, a second difference on each, but that cab be processing delays. However, polling Novell nttp server, I see in the logs:
<7.7> 2014-06-28 22:13:15 Telcontar fetchnews 6367 - - <200 Welcome to forums.novell.com! (Typhoon v2.1.2.394)
<7.6> 2014-06-28 22:13:15 Telcontar fetchnews 6367 - - nntp.novell.com: connected to 130.57.2.15:119, reply: 200
<7.7> 2014-06-28 22:13:15 Telcontar fetchnews 6367 - - >MODE READER
<7.7> 2014-06-28 22:13:15 Telcontar fetchnews 6367 - - <200 Welcome to forums.novell.com! (Typhoon v2.1.2.394)
<7.6> 2014-06-28 22:13:15 Telcontar fetchnews 6367 - - nntp.novell.com: 0 articles posted.
<7.7> 2014-06-28 22:13:15 Telcontar fetchnews 6367 - - >DATE
<7.7> 2014-06-28 22:13:15 Telcontar fetchnews 6367 - - <111 20140628201314
<7.7> 2014-06-28 22:13:15 Telcontar fetchnews 6367 - - check_date: nntp.novell.com: server time 1403986394, our time 1403986395
See? The last line is a time check. Of course, I'm assuming that nntp.novell.com keeps the correct time, and if it is, we are at most at one second difference.
I suppose, the more precise data would be this:
Telcontar:~ # ntptime
ntp_gettime() returns code 0 (OK)
time d759a252.9f4080c0 Sat, Jun 28 2014 22:21:38.622, (.622078977),
maximum error 282753 us, estimated error 1316 us, TAI offset 0
ntp_adjtime() returns code 0 (OK)
modes 0x0 (),
offset 1637.901 us, frequency -40.757 ppm, interval 1 s,
maximum error 282753 us, estimated error 1316 us,
status 0x6001 (PLL,NANO,MODE),
time constant 10, precision 0.001 us, tolerance 500 ppm,
Telcontar:~ #
Or rather this:
Telcontar:~ # rcntp ntptimeset
28 Jun 22:30:26 sntp[7182]: Started sntp
2014-06-28 22:30:26.105689 (-0100) -0.001008 +/- 0.109039 secs
Time synchronized with AmonLanc.valinor
Telcontar:~ #
--
Cheers / Saludos,
Carlos E. R.
(from 13.1 x86_64 "Bottle" at Telcontar)