Thanks, I got it. My CPU dose't support it At 2018-03-14 00:18:34, "Daniel P. Berrangé" <berrange@xxxxxxxxxx> 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 >-- >|: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| >|: https://libvirt.org -o- https://fstop138.berrange.com :| >|: https://entangle-photo.org -o- https://www.instagram.com/dberrange :| _______________________________________________ libvirt-users mailing list libvirt-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvirt-users
