Re: [Xen-users] guest os time drift wild

[Steven Timm <timm@xxxxxxxx>]

On Mon, 9 Apr 2012, Chieu wrote:

> HI, guys
>
> Recently,I met a problem.
> Xen's version: 3.4.3
> guest os:redhat 4.8 32bit
>
> And xen.independent_wallclock = 1 has been set.
>
> The time of guest os change to be fast suddenly, about 2000 second.
> because the change is too wild, ntp didn't sync to the ntp server's time.
>
> my application is dependent on the systme time. And this occurs a lot of times.
>
> I don't know which situation will cause this problem.
I have seen this with many different versions of Redhat 32-bit
guests (4.x and 5.x) on Xen from 3.1 upwards.  Never found a fix besides 
migrating all my guests to 64-bit.  independent_wallclock is
better than not, but I see exactly the same problem that the clock
jumps forward by 20-40 minutes and then just holds there until
real time catches up to it.

Steve Timm


> Does anyone can help me ?
>
> thank you!
>
> sincerely
>
> chieu
>
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> http://lists.xen.org/xen-users
------------------------------------------------------------------
Steven C. Timm, Ph.D  (630) 840-8525
timm@xxxxxxxx  http://home.fnal.gov/~timm/
Fermilab Computing Division, Scientific Computing Facilities,
Grid Facilities Department, FermiGrid Services Group, Group Leader.
Lead of FermiCloud project.

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