Re: [Xen-devel] #599161: Xen debug patch for the "clock shifts by 50 minutes" bug.

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 09.11.12 at 10:05, <Philippe.Simonet@xxxxxxxxxxxx> wrote:
> oops, excuse me, here is a description : I have the problem on 4 systems, 
> all with same hardware.
> the problem occured  on each system, 1 time each 2 month in average. since 
> January 2012, I decided to reboot them all monthly, 
> and the clock jump occurred only once in February ...
> 
> SYSTEM :              HP ProLiant DL385 G7, with 2 * AMD Processor 6174 (12 
> cores) = 24 
> cores, 16 GB MEMORY
> XEN                            (XEN) Xen version 4.0.1 (Debian 4.0.1-5.4) 
> (ultrotter@xxxxxxxxxx) 
> (gcc version 4.4.5 (Debian 4.4.5-8) ) Sat Sep  8 19:15:46 UTC 2012
> DOM0                  Linux 2.6.32-5-xen-amd64 #1 SMP Sun Sep 23 13:49:30 UTC 
> 2012 x86_64 
> GNU/Linux
> CPU                   
> processor       : 0
> vendor_id       : AuthenticAMD
> cpu family      : 16
> model           : 9
> model name      : AMD Opteron(tm) Processor 6174

Huh - so we have the problem on even different vendor CPUs (as
Mauro's are Intel ones). But I take it that you haven't see an event
yet with the debugging patch?

Plus, what's puzzling me a little too - before the occurrence of the
event on Mauro's system, I was under the impression that this
requires quite a bit of uptime. Yet the event he observed occurred
early on the second day after boot afaict.

Jan


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