Date: Tue, 04 May 2021 10:09:18 -0600 From: Ian Lepore <ian@freebsd.org> To: bob prohaska <fbsd@www.zefox.net> Cc: freebsd-arm@freebsd.org Subject: Re: Timezone problems on -current Message-ID: <ca79c422f29cf8810a2cccac6f4b439db19fc06d.camel@freebsd.org> In-Reply-To: <20210504154219.GA47280@www.zefox.net> References: <20210503153442.GB37236@www.zefox.net> <YJCf00lvkp%2BUyamn@cloud.zyxst.net> <20210504015222.GE37236@www.zefox.net> <8e4843ce80e9bc005da5ca42d43e0bc34ce2c6ff.camel@freebsd.org> <20210504154219.GA47280@www.zefox.net>
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On Tue, 2021-05-04 at 08:42 -0700, bob prohaska wrote: > On Tue, May 04, 2021 at 08:42:14AM -0600, Ian Lepore wrote: > > On Mon, 2021-05-03 at 18:52 -0700, bob prohaska wrote: > > > > > > Up to now I've used only the line > > > ntpdate_enable="YES" > > > and it's been enough to keep the clock sane. On the last reboot > > > it appears ntpdate either didn't run or failed silently. The most > > > > You don't need to be running ntpdate at all. ntpd_sync_on_start > > gives > > you the same effect... it allows ntpd to step the clock any > > required > > amount, one time at startup. It's useful for systems that don't > > have a > > battery-backed clock. > > > > It seems clear that ntpd_sync_on_start is a better choice than > ntpdate. > Clock drift on the Pi seems fairly slow, a couple seconds a month, > but > staying right on can't hurt and doesn't cost much. > > > I like to set kern.timecounter.stepwarnings=1 in /etc/sysctl.conf > > so I > > have a record in syslog of when ntpd steps the clock. > > Most of my trouble seems to have been caused by timesetting not > running at > startup and me not noticing promptly. A combination of > ntpd_sync_on_start > and a -g flag will set the clock and make a fuss in the logfiles if > time drifts too far off. Is there a way to make a fuss if ntpd fails > to start in the first place or quits in mid-flight? > > Thanks for writing! > > bob prohaska > Setting ntpd_sync_on_start=yes sets the -g flag for you, you don't also have to set ntpd_flags yourself. -- Ian
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