Re: [libvirt] [PATCH 06/10] vcpubandwidth: introduce two new libvirt APIs
On Thu, 30 Jun 2011 11:13:18 +0800, Wen Congyang <wency(a)cn.fujitsu.com> wrote:
We want to control bandwidth for each vcpu, so we can not use the
API virDomainSetSchedulerParameters(). Introduce two new APIs to
change and query bandwidth for each vcpu.
Will we have different cpu bandwidth for different vcpus?
Something like this:
vcpu1: 1000000/250000
vcpu2: 1000000/500000
vcpu3: 1000000/300000
vcpu4: 1000000/400000
IMO, that is not required, we can have a top level bandwitdh for the VM
and then redistribute it among vcpus equally, without user knowing about
it.
Something like this:
VM1(4vcpu) has to be throttled at 1CPU bandwidth using SetSchedParamters.
Internally libvirt splits it equally:
vcpu1: 1000000/250000
vcpu2: 1000000/250000
vcpu3: 1000000/250000
vcpu4: 1000000/250000
So why introduce VCPU level apis?
Regards,
Nikunj