Re: [PATCH v2 00/11] KVM in-guest performance monitoring

[David Ahern <daahern@cisco.com>]

On 06/14/2011 11:24 AM, Jan Kiszka wrote:
> On 2011-06-14 19:15, David Ahern wrote:
>> On 06/14/2011 02:36 AM, Avi Kivity wrote:
>>> On 06/13/2011 10:55 PM, David Ahern wrote:
>>>> On 06/13/2011 07:34 AM, Avi Kivity wrote:
>>>>>  This patchset exposes an emulated version 1 architectural performance
>>>>>  monitoring unit to KVM guests.  The PMU is emulated using perf_events,
>>>>>  so the host kernel can multiplex host-wide, host-user, and the
>>>>>  guest on available resources.
>>>>
>>>> Any particular magic needed to try this patchset?
>>>>
>>>
>>> You'll need the attached patch, '-cpu host' (or '-cpu host,model=0'
>>> sometimes), and, as patch 2 is a guest bug fix, you'll need to run the
>>> patched kernel in the guest as well.
>>>
>>
>> qemu-kvm is not cooperating. git repo as of 05f1737582 with your patch
>> is aborting:
>>
>> 		Welcome to Fedora
>> Starting udev: [    4.031626] udev[409]: starting version 161
>> [    4.831159] piix4_smbus 0000:00:01.3: SMBus Host Controller at
>> 0xb100, revision 0
>> qemu-kvm: /exports/daahern/qemu-kvm.git/hw/msix.c:616:
>> msix_unset_mask_notifier: Assertion `dev->msix_mask_notifier' failed.
> 
> Use the qemu-kvm next branch. It has the fix you need.

Indeed it does. Thanks.

Avi: still no luck:
[    0.047996] Performance Events: unsupported p6 CPU model 0 no PMU
driver, software events only.

qemu-kvm next branch, ce5f0a588b740e8f28f46a6009e12cfa72edc51f with your
perfmon cpuid change. Host and guest are both running your kvm next
branch with pmu patch series.

David


> 
> Jan
>