Re: [Xen-devel] Latest unstable detects cpu speed incorrectly

[Valtteri Kiviniemi <valtteri.kiviniemi@xxxxxxxxxxxx>]

Hi,

I'll take that back, now its occuring in every virtual.

xentop shows this:

xentop - 18:13:15   Xen 3.5-unstable
6 domains: 4 running, 0 blocked, 0 paused, 0 crashed, 0 dying, 0 shutdown
Mem: 16758480k total, 4884612k used, 11873868k free    CPUs: 8 @ 2493MHz
      NAME  STATE   CPU(sec) CPU(%)     MEM(k) MEM(%)  MAXMEM(k) 
MAXMEM(%) VCPUS NETS NETTX(k) NETRX(k) VBDS   VBD_OO   VBD_RD   VBD_WR SSID
       cvx -----r       1239  318.2    1048576    6.3    1048576 
6.3     8    1     4882     2706    2        0     9308     5191    0
        db ------         33   27.6     524288    3.1     524288 
3.1     8    1     1307      920    2        0     7170      518    0
  Domain-0 -----r       2531    4.7     520448    3.1   no limit 
n/a     8    0        0        0    0        0        0        0    0
      game -----r       1407  338.8    1048576    6.3    1048576 
6.3     8    1     1013     1002    2        0     3770      630    0
        gj ------        375   48.0     524288    3.1     524288 
3.1     8    1        0        0    2        0        0        0    0
    markka -----r      14565   62.8    1048576    6.3    1048576 
6.3     8    1    42202    39013    2        0   132016   122133    0

- Valtteri Kiviniemi

Valtteri Kiviniemi kirjoitti:
> Hi,
>
> I have to wait for that to occur again. There were no error messages, 
> suddenly domU's with emulated TSC started to use a lot of CPU until they 
> were so slow that they had to be destroyed. domU's with native tsc are 
> working fine.
> Is there any way to track down the problem?
>
> - Valtteri Kiviniemi
>
> Keir Fraser kirjoitti:
> > Haven't heard any other reports of that. Can you provide more details?
> >
> >  -- Keir
> >
> > On 27/10/2009 15:51, "Valtteri Kiviniemi" 
> > <valtteri.kiviniemi@xxxxxxxxxxxx>
> > wrote:
> >
> > > Hi,
> > >
> > > Seems like that emulation is not quite working as it should be. domU's
> > > are using all the available cpu and then they crash. I did a fallback
> > > back to the old behaviour and the virtuals running with tsc_native=1 are
> > > working fine.
> > >
> > > - Valtteri Kiviniemi
> > >
> > > Valtteri Kiviniemi kirjoitti:
> > > > Hi,
> > > >
> > > > Ok, good to know. Is it always at 1GHz or can it be adjusted? Is there
> > > > some other new features different from 3.4.1 that I should know?
> > > >
> > > >
> > > > - Valtteri Kiviniemi
> > > >
> > > > Keir Fraser kirjoitti:
> > > > > On 27/10/2009 15:22, "Valtteri Kiviniemi"
> > > > > <valtteri.kiviniemi@xxxxxxxxxxxx>
> > > > > wrote:
> > > > >
> > > > > > We are testing the latest xen-unstable and found an interesting bug.
> > > > > > dom0 detects cpu speed correctly but when booting domU it detects it
> > > > > > incorrectly:
> > > > > >
> > > > > > "Detected 1000.000 MHz processor."
> > > > > TSC is emulated at that speed. If you want old behaviour then add
> > > > > tsc_native=1
> > > > > to your domain config file.
> > > > >
> > > > >  -- Keir
> > > > >
> > > > >
> > > > >
> > > > > _______________________________________________
> > > > > Xen-devel mailing list
> > > > > Xen-devel@xxxxxxxxxxxxxxxxxxx
> > > > > http://lists.xensource.com/xen-devel
> > > _______________________________________________
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> > > Xen-devel@xxxxxxxxxxxxxxxxxxx
> > > http://lists.xensource.com/xen-devel
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