On Sun, Oct 02, 2011 at 07:12:42PM +0200, Avi Kivity wrote:
> On 10/02/2011 07:07 PM, Robin Lee Powell wrote:
> >On Sun, Oct 02, 2011 at 07:06:35PM +0200, Avi Kivity wrote:
> >>  On 10/02/2011 02:45 AM, Robin Lee Powell wrote:
> >>  >I'm afraid clocksource=hpet didn't help much; after about 24 hours
> >>  >up, tcpdump hung the machine for for about 10 seconds.  That may or
> >>  >may not be better than usual; I haven't been timing things
> >>  >precisely.  My suspicion is that it's slightly better, but it's
> >>  >still not great.
> >>  >
> >>  >Also:
> >>  >
> >>  >rlpowell@vrici>   dmesg | grep -i clock
> >>  >[    0.000000] Command line: ro root=/dev/vda2 rd_NO_LUKS rd_NO_LVM 
> >> rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYTABLE=us 
> >> console=ttyS0,115200 clocksource=hpet
> >>  >[    0.000000] kvm-clock: Using msrs 12 and 11
> >>  >[    0.000000] kvm-clock: cpu 0, msr 0:1b567c1, boot clock
> >>  >[    0.000000] kvm-clock: cpu 0, msr 0:5fc137c1, primary cpu clock
> >>  >[    0.000000] Kernel command line: ro root=/dev/vda2 rd_NO_LUKS 
> >> rd_NO_LVM rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 
> >> KEYTABLE=us console=ttyS0,115200 clocksource=hpet
> >>  >[    0.000000] hpet clockevent registered
> >>  >[    0.260136] Switching to clocksource hpet
> >>  >[    1.009393] rtc_cmos 00:01: setting system clock to 2011-10-01 
> >> 07:49:50 UTC (1317455390)
> >>  >[    1.821905] Refined TSC clocksource calibration: 2394.030 MHz.
> >>  >[60555.473797] Clocksource tsc unstable (delta = -42950328292 ns)
> >>  >
> >>  >(note the last line)
> >>  >
> >>
> >>  Do you get a similar error with kvmclock?
> >
> >I don't think I did, no.  I'm not completely certain, but pretty
> >sure.
> >
> 
> Then let's try to understand why it doesn't work with kvmclock.

I'd love to.  Suggestions?

-Robin
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