Re: Latest unstable detects cpu speed incorrectly

[Valtteri Kiviniemi <valtteri.kiviniemi@dataproof.fi>]

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@dataproof.fi>
>> 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@dataproof.fi>
>>>>> 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@lists.xensource.com
>>>>> http://lists.xensource.com/xen-devel
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>>
>>
>