Hi, Kan, 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 <kan.li...@intel.com> 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
