From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Ahern Subject: Re: use of PMU in guest generates messages in host Date: Thu, 12 Jan 2012 07:02:12 -0700 Message-ID: <4F0EE7E4.9090509@gmail.com> References: <4F0DF57B.5040500@gmail.com> <20120112062646.GQ2167@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: KVM mailing list To: Gleb Natapov Return-path: Received: from mail-gy0-f174.google.com ([209.85.160.174]:42609 "EHLO mail-gy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753602Ab2ALOCS (ORCPT ); Thu, 12 Jan 2012 09:02:18 -0500 Received: by ghbg16 with SMTP id g16so259085ghb.19 for ; Thu, 12 Jan 2012 06:02:18 -0800 (PST) In-Reply-To: <20120112062646.GQ2167@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: 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