On Wed, Nov 13, 2013 at 11:52:01AM -0500, Binh Q. Pham wrote: > Hi all, > > I just started using kvm and want to use linux 'perf' tool inside > the virtual machine to get some information about the hardware > performance counters. I noticed in kvm source, there is pmu.c and > pmu-stubs.c, so I assume they provide support for PMU. However, when > I ran 'perf stat' in the VM, all hardware events are not supported. > Sample screen shot: > > perf stat /bin/ls > Performance counter stats for '/bin/ls': > <not supported> cycles > <not supported> stalled-cycles-frontend > .... > > Could someone clarify for me if I can use 'perf' in VM with the > current kvm state? > You need to specify host cpu type to QEMU: -cpu host. -- Gleb. -- 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
