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From: "Binh Q. Pham" <binhpham@cs.rutgers.edu>
To: kvm@vger.kernel.org
Subject: Performance counters in kvm?
Date: Wed, 13 Nov 2013 11:52:01 -0500	[thread overview]
Message-ID: <5283AE31.1000303@cs.rutgers.edu> (raw)

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

             reply	other threads:[~2013-11-13 17:52 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-11-13 16:52 Binh Q. Pham [this message]
2013-11-13 17:54 ` Performance counters in kvm? Gleb Natapov
2013-11-14  3:22   ` Binh Q. Pham
2013-11-14  7:16     ` Gleb Natapov
2013-11-14 16:17       ` Binh Q. Pham
2013-11-14 16:46         ` Gleb Natapov
2013-11-14 17:04           ` Binh Q. Pham
2013-11-14 17:21             ` Gleb Natapov
2013-11-14 20:31               ` Binh Q. Pham
2013-11-14 21:08                 ` Gleb Natapov
2013-12-09 18:59                   ` Binh Q. Pham
2013-12-10 10:59                     ` Gleb Natapov
2013-12-10 14:17                       ` Binh Q. Pham

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