From: David Ahern <dsahern@gmail.com>
To: Gleb Natapov <gleb@redhat.com>
Cc: KVM mailing list <kvm@vger.kernel.org>
Subject: Re: use of PMU in guest generates messages in host
Date: Thu, 12 Jan 2012 07:02:12 -0700 [thread overview]
Message-ID: <4F0EE7E4.9090509@gmail.com> (raw)
In-Reply-To: <20120112062646.GQ2167@redhat.com>
On 01/11/2012 11:26 PM, Gleb Natapov wrote:
> On Wed, Jan 11, 2012 at 01:47:55PM -0700, David Ahern wrote:
>> Using latest kernel tree (e343a895a9f342f239c5e3c5ffc6c0b1707e6244)
>> which has KVM bits for using PMU in the guest. Host and guest are both
>> running Fedora 16, 64-bit, with this kernel.
>>
>> Running this command in the guest:
>> perf stat -ddd -- openssl speed aes
>>
>> Generates this in the host:
>> [74728.221863] kvm_set_msr_common: 2760 callbacks suppressed
>> [74728.221950] kvm: 28217: cpu2 unhandled wrmsr: 0x1a6 data f701
>> [74728.222115] kvm: 28217: cpu2 unhandled wrmsr: 0x1a6 data f701
>> [74728.222858] kvm: 28217: cpu2 unhandled wrmsr: 0x1a6 data f701
>> [74728.223018] kvm: 28217: cpu2 unhandled wrmsr: 0x1a6 data f701
>> [74728.223851] kvm: 28217: cpu2 unhandled wrmsr: 0x1a6 data f701
>> [74728.224009] kvm: 28217: cpu2 unhandled wrmsr: 0x1a6 data f701
>> [74728.224843] kvm: 28217: cpu2 unhandled wrmsr: 0x1a6 data f701
>> [74728.224997] kvm: 28217: cpu2 unhandled wrmsr: 0x1a6 data f701
>> [74728.225842] kvm: 28217: cpu2 unhandled wrmsr: 0x1a6 data f001
>> [74728.226010] kvm: 28217: cpu2 unhandled wrmsr: 0x1a6 data f001
>>
> This is MSR_OFFCORE_RSP_0 MSR which is not (yet?) supported. What is
> your host cpu and qemu command line?
Host CPU: Intel(R) Xeon(R) CPU E5540 @ 2.53GHz
and '-cpu host' is used on the qemu command line.
David
next prev parent reply other threads:[~2012-01-12 14:02 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-11 20:47 use of PMU in guest generates messages in host David Ahern
2012-01-12 6:26 ` Gleb Natapov
2012-01-12 14:02 ` David Ahern [this message]
2012-01-12 14:14 ` Gleb Natapov
2012-01-12 17:07 ` David Ahern
2012-01-12 17:17 ` Avi Kivity
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