[libvirt] [PATCH 06/10] vcpubandwidth: introduce two new libvirt APIs

Taku Izumi izumi.taku at jp.fujitsu.com
Thu Jul 7 02:32:15 UTC 2011

> >>>>> So why introduce VCPU level apis?
> >>>>
> >>>> Adam Litke said IBM's performance team nead to control cpu bandwidth for each
> >>>> vcpu.
> >>> Right, but we do not export that as a User API, that was my suggestion.
> >>> We can internally control each vcpu's bandwidth, i.e. divide equally.
> >>
> >> Hmm, I heard that some server could run CPUs at different speed.
> >> May be this patch can simulate this behavior. 
> > That happens on my laptop as well, depending on the machine load CPU
> > frequency is changed but it is done transparently.
> I means explicitly CPU speed configuring. ;)
> > 
> > I am not sure if we are trying to simulate that here.
> So why not leave the flexible interface here, and let users make
> the decision?

 In my mind, the flexibility is not always a good thing.
 It is nothing but troublesome for the person who doesn't like
 detailed setting. I don't know how many people want this flexibility.

 I'm for Nikunj's desgin. Do you have any concerns?

Best regards, 
Taku Izumi <izumi.taku at jp.fujitsu.com>

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