From: "Yan, Zheng" <zheng.z.yan@linux.intel.com>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Pekka Enberg <penberg@kernel.org>,
Sasha Levin <levinsasha928@gmail.com>,
Asias He <asias.hejun@gmail.com>,
Cyrill Gorcunov <gorcunov@gmail.com>, Ingo Molnar <mingo@elte.hu>,
KVM General <kvm@vger.kernel.org>
Subject: Re: perf uncore & lkvm woes
Date: Thu, 16 Aug 2012 15:38:16 +0800 [thread overview]
Message-ID: <502CA368.8050404@linux.intel.com> (raw)
In-Reply-To: <1345101585.31459.112.camel@twins>
On 08/16/2012 03:19 PM, Peter Zijlstra wrote:
> On Thu, 2012-08-16 at 10:01 +0300, Pekka Enberg wrote:
>> Has anyone seen this? It's kvmtool/next with 3.6.0-rc1. Looks like we
>> are doing uncore_init() on virtualized CPU which breaks boot.
>
> I think you're the first.. I don't normally use kvm if I can at all
> avoid it.
>
> But I think its a 'simple' matter of kvm not emulating the entire
> hardware. Afaik the uncore isn't enumerated and we simply assume MSR
> presence based on cpu model.
The Intel uncore doc does not specify how to check if uncore exist.
How about disabling uncore on virtualized CPU?
Regards
Yan, Zheng
next prev parent reply other threads:[~2012-08-16 7:38 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-16 7:01 perf uncore & lkvm woes Pekka Enberg
2012-08-16 7:07 ` Cyrill Gorcunov
2012-08-16 7:16 ` Cyrill Gorcunov
2012-08-16 7:16 ` Pekka Enberg
2012-08-16 7:19 ` Peter Zijlstra
2012-08-16 7:38 ` Yan, Zheng [this message]
2012-08-16 7:41 ` Pekka Enberg
2012-08-16 7:46 ` Cyrill Gorcunov
2012-08-16 8:45 ` Avi Kivity
2012-08-16 9:06 ` Cyrill Gorcunov
2012-08-16 9:23 ` Pekka Enberg
2012-08-16 8:40 ` Avi Kivity
2012-08-16 11:06 ` Avi Kivity
2012-08-16 11:17 ` Peter Zijlstra
2012-08-16 11:25 ` Avi Kivity
2012-08-17 1:40 ` Yan, Zheng
2012-08-17 6:56 ` Peter Zijlstra
2012-08-19 9:55 ` Avi Kivity
2012-08-20 4:15 ` Yan, Zheng
2012-08-20 8:49 ` Avi Kivity
2012-08-21 1:11 ` Yan, Zheng
2012-08-21 8:32 ` Avi Kivity
2012-08-21 9:07 ` Yan, Zheng
2012-08-20 5:30 ` Yan, Zheng
2012-08-20 8:48 ` Avi Kivity
2012-08-21 7:11 ` Peter Zijlstra
2012-08-21 8:34 ` Avi Kivity
2012-08-21 10:35 ` Peter Zijlstra
2012-08-22 8:53 ` Avi Kivity
2012-08-16 14:28 ` David Ahern
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