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



thank you for help.

The special is when the time jumps forward, then the time won't change
and keep the time always。

for example, the time jumps to 4:00 from 3:30, then the time keeps 4:00。



2012/4/9 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
>>
>> _______________________________________________
>> Xen-users mailing list
>> Xen-users@xxxxxxxxxxxxx
>> 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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