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

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!



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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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