Re: [libvirt] [resend v2 0/7] Support cache tune in libvirt

-- Eli Qiao Sent with Sparrow (http://www.sparrowmailapp.com/?sig) On Tuesday, 7 February 2017 at 3:03 AM, Marcelo Tosatti wrote: Sure. Hmm.. in this case, we need to figure out what’s the pid of vcpus=2 and vcpu=3 and added them to the resctrl directory. currently, I create a resctrl directory(called resctrl domain) for a VM so just put all task ids to it. this is my though: let say the vm has vcpus=0 1 2 3, and you want to let 0, 1 benefit cache on host_id=0, and 2, 3 on host_id=1 you will do: 1) pin vcpus 0, 1 on the cpus of socket 0 pin vcpus 2, 3 on the cpus of socket 1 this can be done in vcputune 2) define cache tune like this: <cachetune id='0' host_id=‘0' type='l3' size='3072' unit='KiB'/> <cachetune id='1' host_id='1' type='l3' size='3072' unit='KiB'/> in libvirt: we create a resctrl directory naming with the VM’s uuid and set schemata for each socket 0, and socket 1, put all qemu tasks ids into tasks file, this will work fine. please be note that in a resctrl directory, we can define schemata for each socket id separately. IOM, I don’t think it’s good to have this. in libvirt capabilities xml, the application will get to know if the host support cdp or not. I am open to hear about what other’s say, Thanks for the testing.