From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Binh Q. Pham" <binhpham@cs.rutgers.edu>
Subject: Performance counters in kvm?
Date: Wed, 13 Nov 2013 11:52:01 -0500
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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?

Thanks for your help,
Binh