Re: system (not HW) clock advancing really fast

[Michael Frank <mhf@linuxmail.org>]

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
> 
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