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.liang@xxxxxxxxx> 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 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
