Re: [Xen-devel] domU clock over 23s off

[Harald Koenig <H.Koenig@xxxxxxxxxxxxxxxxxxxx>]

On Jul 12, Keir Fraser wrote:

> >- correct startup time (mount time, syslog start time etc), and
> >- working ntp ?
> 
> Run ntpd in domain0, and don't use independent_wallclock.

that was my default setup I started with, until yesterday I realized that the
domUs don't keep the time in sync.  dom0 (FC4) is perfectly in sync running 
ntp. 

the domUs run ntp too, but there they don't manage to set/adjust the system 
time,
so the ntp on domU logs the time skew.  from syslog of a RH9 client:

Jun 26 20:08:25 os-rh9 ntpd[1666]: time reset +12.532031 s
Jun 26 20:24:51 os-rh9 ntpd[1666]: time reset +12.597371 s
Jun 26 20:41:07 os-rh9 ntpd[1666]: time reset +12.761633 s
Jun 26 21:02:54 os-rh9 ntpd[1666]: time reset +12.843185 s
Jun 26 21:19:18 os-rh9 ntpd[1666]: time reset +12.930329 s
Jun 26 21:38:59 os-rh9 ntpd[1666]: time reset +13.028862 s
Jun 26 21:56:19 os-rh9 ntpd[1666]: time reset +13.159422 s
...
Jun 27 20:05:22 os-rh9 ntpd[1666]: time reset +19.513893 s
Jun 27 20:22:37 os-rh9 ntpd[1666]: time reset +19.640442 s
Jun 27 20:37:47 os-rh9 ntpd[1666]: time reset +19.718607 s
Jun 27 20:55:09 os-rh9 ntpd[1666]: time reset +19.769548 s
Jun 27 21:13:31 os-rh9 ntpd[1666]: time reset +19.865546 s
Jun 27 21:30:49 os-rh9 ntpd[1666]: time reset +19.965029 s


does running ntp in a domU disable the clock synchronisation between dom0 and 
domU ?
 


Harald Koenig
-- 
"I hope to die                                      ___       _____
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Donald E. Knuth, 02-Oct-2001 in Tuebingen.        <_/  /  /OOOOOOOOOOO\
                                                    \  \/OOOOOOOOOOOOOOO\
                                                      \ OOOOOOOOOOOOOOOOO|//
Harald Koenig                                          \/\/\/\/\/\/\/\/\/
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