Messages in this thread | | | From | Michael Frank <> | Subject | Re: system (not HW) clock advancing really fast | Date | Mon, 16 Feb 2004 14:24:49 +0800 |
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I had this somtetimes when using ntpd doing step time update resulting in silly values in /etc/adjtime .
# mv /etc/adjtime /tmp # hwclock --systohc
and see if it goes away.
Regards Michael
On Monday 16 February 2004 13:46, Bill Anderson wrote: > Kernel version: > 2.4.24-xfs > We've apaprently had this problem for a while > > Ok, I've got an HP LPr machine, dual 700MHz intel machine that has it's > system clock gaining seconds very quickly. This, I am told, has been > happening for several kernels. > > At first, others on the team insisted it was the hardware clock at > fault, as rebooting the system gives the appearance of fixing it. > However, the system is currently having this issue, and the HW clock is > actually keeping accurate time, as I expected. > > The time gain is no consistent. It can gain 3 seconds in one, or 12 in > 11, but it always runs fast. This time speedup is to much for ntp to > keep up with. If I sync from hwclock or ntpdate every second, I'm > correcting about 1-3 seconds each time. This is a mail server, so I am > sure you can appreciate the need for accurate timestamps. ;) > > I've seen many messages in the archives about *losing* time, but only a > few about gaining it. Personally, I am opposed to the "just reboot it" > mentality; one reason I run Linux. > > Given that we are talking about system clock, not HW, and that this > happens with or w/o ntpd/ntpdate, I am suspecting something in the > kernel. Also, this thread leads me there too: > http://marc.theaimsgroup.com/?l=linux-kernel&m=105465355622844&w=2 > > > Am I off base here? I can probably keep the hwclock sync method running > for a day or so before I'm forced to reboot it, so if there is anything > you need to know or want me to try while it is in this state, let me > know. > > This address is not subscribed, so please cc me on responses. > > Thanks, > > Bill > > > > > -- > Bill Anderson <banderson@hp.com> > Red Hat Certified Engineer > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > >
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