Date: Mon, 13 Nov 2017 22:33:37 +0100 (CET) From: Andreas Schwarz <freebsd.asc@strcmp.org> To: freebsd-arm@FreeBSD.org, ian@freebsd.org Subject: Re: PINE64 - 12.0-CURRENT r324563 - ntpd can't keep time Message-ID: <4afdde9c747.319ba732@mail.schwarzes.net> In-Reply-To: <FCA144E8-121A-48A5-8CDB-101FBDE6E84C@dsl-only.net> References: <d85f883f-84c2-5051-1996-2a0e73a2c1e7@restart.be> <4BF75B1E-318C-414A-B5D4-4BA7D6578316@dsl-only.net> <1509029871.56824.49.camel@freebsd.org> <c2bff518-89ce-4956-2548-e56afab5d83d@restart.be> <4af740148ca.47a474e3@mail.schwarzes.net> <04b67007-a95a-9e40-28b4-764adf8b2ded@restart.be> <FCA144E8-121A-48A5-8CDB-101FBDE6E84C@dsl-only.net>
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On 13.11.17, Mark Millard wrote: > On 2017-Nov-13, at 9:01 AM, Henri Hennebert <hlh at restart.be> wrote: >> remote refid st t when poll reach delay offset jitter >> ============================================================================== >> 0.freebsd.pool. .POOL. 16 p - 64 0 0.000 0.000 0.000 >> -webhost2.mitht. 193.67.79.202 2 u 948 1024 177 58.815 1.451 0.932 >> +ns2.telecom.lt 212.59.3.3 2 u 13 1024 177 43.400 -357912 357913. >> +ntp.bserved.nl 193.67.79.202 2 u 1111 1024 37 17.664 0.980 0.379 >> -178.32.44.208 ( 193.190.230.65 2 u 81 1024 177 14.930 1.087 135278. >> *stratum2-1.NTP. 129.70.130.71 2 u 1077 1024 77 28.135 1.998 0.570 >> -linode.ibendit. 199.102.46.77 2 u 2048 1024 76 129.945 0.307 0.584 >> #193.104.37.238 193.190.230.66 2 u 799 1024 77 14.977 1.321 0.821 >> >> And after a half hour the clock was 5 minutes in the future. > > Did you notice the huge offset and jitter in your listing: > (last 2 numerals in the line below) > > +ns2.telecom.lt 212.59.3.3 2 u 13 1024 177 43.400 -357912 357913. Yes, this peer causes the problem, the offset jumps between your pollings from ~0 to -350k, all other peers are in range. The jitter was the result of this jump. In your previous emails, other peers had the same problem, so it's probaly not a problem with the peer itself. Maybe a strange network problem, ntp is UDP, do you have a real IP Adress, without NAT/CGN or other packet rewriting? -asc
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