; jmatt...@google.com; wanpen...@tencent.com; vkuzn...@redhat.com;
> sean.j.christopher...@intel.com; pbonz...@redhat.com
> 主题: Re: [PATCH][v2] kvm: x86: emulate APERF/MPERF registers
>
> On 4/29/2020 1:46 PM, Li RongQing wrote:
> > Guest kernel reports a fixed cpu frequency in /pro
On 4/29/2020 1:46 PM, Li RongQing wrote:
Guest kernel reports a fixed cpu frequency in /proc/cpuinfo,
this is confused to user when turbo is enable, and aperf/mperf
can be used to show current cpu frequency after 7d5905dc14a
"(x86 / CPU: Always show current CPU frequency in /proc/cpuinfo)"
so we
de;
> j...@8bytes.org; jmatt...@google.com; wanpen...@tencent.com;
> vkuzn...@redhat.com; sean.j.christopher...@intel.com
> 主题: Re: [PATCH][v2] kvm: x86: emulate APERF/MPERF registers
>
> On 29/04/20 10:54, Peter Zijlstra wrote:
> > On Wed, Apr 29, 2020 at 01:46:36PM +0800, Li
On 29/04/20 10:54, Peter Zijlstra wrote:
> On Wed, Apr 29, 2020 at 01:46:36PM +0800, Li RongQing wrote:
>> Guest kernel reports a fixed cpu frequency in /proc/cpuinfo,
>> this is confused to user when turbo is enable, and aperf/mperf
>> can be used to show current cpu frequency after 7d5905dc14a
>
> Would it make sense to provide a pass-through APERF/MPERF for
> KVM_HINTS_REALTIME ? Because that hint guarantees we have a 1:1
> vCPU:CPU binding and guaranteed no over-commit.
Make sense
I think this can be done in a separate patch for KVM_HINTS_REALTIME
Thanks
=Li
On Wed, Apr 29, 2020 at 01:46:36PM +0800, Li RongQing wrote:
> Guest kernel reports a fixed cpu frequency in /proc/cpuinfo,
> this is confused to user when turbo is enable, and aperf/mperf
> can be used to show current cpu frequency after 7d5905dc14a
> "(x86 / CPU: Always show current CPU
Guest kernel reports a fixed cpu frequency in /proc/cpuinfo,
this is confused to user when turbo is enable, and aperf/mperf
can be used to show current cpu frequency after 7d5905dc14a
"(x86 / CPU: Always show current CPU frequency in /proc/cpuinfo)"
so we should emulate aperf mperf to achieve it
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