Re: [Xen-devel] Xen 4 TSC problems

["Jan Beulich" <JBeulich@xxxxxxxxxx>]

>>> On 24.02.11 at 12:57, Olivier Hanesse <olivier.hanesse@xxxxxxxxx> wrote:
> I tried to turn off cstates with max_cstate=0 without success (still "not
> reliable").
> 
> With cpuidle=0, I also got :
> 
> (XEN) TSC has constant rate, deep Cstates possible, so not reliable,
> warp=3022 (count=1)

This message by itself isn't telling much I believe.

> xm info | grep command
> xen_commandline        : dom0_mem=512M cpuidle=0 loglvl=all guest_loglvl=all
> dom0_max_vcpus=1 dom0_vcpus_pin console=vga,com1 com1=19200,8n1
> 
> Keir :
> 
> Using clocksource=pit :
> 
> (XEN) Platform timer is 1.193MHz PIT
> 
> I also got :
> 
> (XEN) TSC has constant rate, deep Cstates possible, so not reliable,
> warp=3262 (count=2)

The question is whether any of this eliminates the time jumps seen
by your DomU-s (from your past mails I wasn't actually sure whether
Dom0 also experienced this problem, albeit it would be odd if it didn't).

Jan

Jan


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