Thanks for your reply.
1. If the guest is non-paravirt, can I get the LLC-loads number?
2. Do you know any method that can capture the LLC-loads for the guest? Thanks.
- Hui
On Wed, Aug 27, 2014 at 9:05 AM, Liang, Kan <
address@hidden> wrote:
>
>
>>
>> Dear KVM developers:
>> I am trying use perf stat inside a VM to obtain some hardware cache
>> performance counter values.
>> The perf stat can report some numbers for L1 and TLB related counters. But
>> for the LLC-loads and LLC-load-misses, the numbers are always 0. It seems
>> that the these offcore events are not exposed to the guest.
>>
>> Is this a bug in Qemu or KVM?
>>
>
> There is no offcore virtualization support in KVM yet.
> For you case, I guess you are using paravirt for guest, so it should be 0.
> Otherwise, you should get #GP in guest.
>
>
>> My testbed is
>>
>> Host kernel: 3.12.26
>> Qemu: 2.1.0
>> CPU: Intel Ivy bridge 2620
>> VM boosted by qemu, with -cpu host.
>>
>> Thanks.
>>
>> - Hui Kang