Re: [Xen-devel] Require solution for "xenoprof: Initialization failed. Intel processor model 44 for P6 class family is not supported“

[George Dunlap <dunlapg@xxxxxxxxx>]

2011/6/30 fred <dujian1985@xxxxxxxxx>:
> Hi Konrad:
>     the version of Xen hypervisor is 3.4.3 and the version of kernel is
> 2.6.18.  I don't know why it works well in physical machine and fails
> in virtual machine ?

Because virtual machines aren't allowed to have direct access to host
performance counters; the VM has to ask Xen to do it.  Performance
counters are very specific to individual processor models; so Xen
needs support for specific processor models for the guest to be able
to use performance counters rather than simply using a timer
interrupt.  Those changes are typically not backported to older
releases (although there's no reason maintainers couldn't do so if
they chose.)

 -George

>
> 2011/6/28 Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
>>
>> On Tue, Jun 28, 2011 at 03:24:04PM +0800, fred wrote:
>> > HI all :
>> >           I got the message "Using timer interrupt." when trying the
>> > command
>>
>> You need to provide more details. Is this 3.0? 2.6.39? What version of Xen
>> hypervisor?
>>
>> > "opcontrol --list-events". then I found infomation "xenoprof:
>> > Initialization
>> > failed. Intel processor model 44 for P6 class family is not supported"
>> > after
>> > "xm dmesg".  the TYPE OF CPUS here is Intel(R) Xeon(R) CPU  E5620  @
>> > 2.40GHz.
>> >          So does it really not support this type of processor  and is
>> > there
>> > any fix that may solve it ？ need help...
>> >
>> > .
>> > Thanks~
>>
>> > _______________________________________________
>> > Xen-devel mailing list
>> > Xen-devel@xxxxxxxxxxxxxxxxxxx
>> > http://lists.xensource.com/xen-devel
>>
>
>
>
> --
>
>
>
>
>
> Thank you~
>
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