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Re: [libvirt-users] Resource control is not supported on this host



Thanks, I got it. My CPU dose't support it
At 2018-03-14 00:18:34, "Daniel P. Berrangé" <berrange redhat com> wrote:
>On Tue, Mar 13, 2018 at 05:13:52PM +0100, Peter Krempa wrote:
>> On Tue, Mar 13, 2018 at 15:34:00 +0100, Michal Privoznik wrote:
>> > On 03/13/2018 09:51 AM, Allence wrote:
>> > > Libvirt release version V4.1.0
>> > > It add a element is cachetune
>> > > After we add this, We can use host-cpu-cache
>> > > But when i add it, my host get a error message:
>> > > "Resource control is not supported on this host"
>> > > Why? 
>> > 
>> > For Cache Allocation Technology you need support at CPU hardware level.
>> > Currently, only less than dozen CPUs support it (all server level Xeons):
>> > 
>> > https://www.intel.com/content/www/us/en/communications/cache-monitoring-cache-allocation-technologies.html#xeoncmtcat
>> 
>> Also besides that, the feature depends on a kernel feature which was
>> broken upstream and deemed unusable and thus reverted. Until libvirt is
>> rewritten to use the new resource control interface, the feature will
>> not work with new kernels.
>
>IIUC, that only applies to the perf stuff for reporting cache usage of
>a VM.
>
>The reporter here was trying to use the cache allocation stuff for
>partitioning which AFAIK hasn't changed it userspace API
>
>Regards,
>Daniel
>-- 
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