[sles-beta] A Problem with KVM Guest ?

[Günther J. Niederwimmer]

Am Donnerstag, 4. September 2014, 13:57:01 schrieb Antoine Ginies:
> Günther J. Niederwimmer:
> > Am Donnerstag, 4. September 2014, 12:24:02 schrieb Antoine Ginies:
> > > Günther J. Niederwimmer:
> > > > Hello,
> > > > I found a Problem with KVM_clock?
> > > > on my Installation I have a KVM Server and KVM Clients all SLES 12
> > > > Server
> > > > The KVM Host have a NTP Server configured and have a correct time
> > > > 
> > > > date
> > > > Don Sep  4 12:00:19 CEST 2014
> > > > all clients have this Time
> > > > date
> > > > Don Sep  4 02:15:24 CEST 2014
> > > > 
> > > > the timezone is correct but the time is wrong ?
> > > 
> > > Hello,
> > > Can you check that your VM is currently using kvm_clock?
> > 
> > akerb:~ # dmesg | grep kvm-clock
> > [    0.000000] kvm-clock: Using msrs 4b564d01 and 4b564d00
> > [    0.000000] kvm-clock: cpu 0, msr 1:3ff18001, boot clock
> > [    0.000000] kvm-clock: cpu 0, msr 1:3ff18001, primary cpu clock
> > [    0.004000] kvm-clock: cpu 1, msr 1:3ff18041, secondary cpu clock
> > [    0.004000] kvm-clock: cpu 2, msr 1:3ff18081, secondary cpu clock
> > [    0.004000] kvm-clock: cpu 3, msr 1:3ff180c1, secondary cpu clock
> > [    0.134685] Switched to clocksource kvm-clock
> > 
> > This is the client
> > 
> > root# cat /sys/devices/system/clocksource/clocksource0/current_clocksource
> 
> You forget the value, but according to dmesg it was kvm-clock at
> 0.134685 until something else has switched to another value.

I mean we miss understand  use

The behind is from a CLIENT

This is from the HOST !!

 dmesg | grep clocksource
[    0.560063] Switched to clocksource hpet
[    2.329666] tsc: Refined TSC clocksource calibration: 3700.000 MHz
[    3.645349] Switched to clocksource tsc

and I like to change this for Tests.
> ------------
> root # dmesg | grep clocksource
> ------------
> will let you know if there is any change.
> 
> > I have on the Server
> > tsc
> > 
> > This is a original YaSt Installation
> > 
> > can I change this manual ?
> 
> On VM guest you can change it with echo:
> ----------
> echo tsc > /sys/devices/system/clocksource/clocksource0/current_clocksource
> echo kvm-clock >
> /sys/devices/system/clocksource/clocksource0/current_clocksource ----------
> 
> You should see a dmesg in the console of your VM guest saying that
> clocksource has switched.

Have I to open a SR ?

-- 
mit freundlichen Grüßen / best Regards,

  Günther J. Niederwimmer