Re: Stolen and degraded time and schedulers

[Ingo Molnar]

* Jeremy Fitzhardinge <jeremy@xxxxxxxx> wrote:

> I added stolen time accounting to xen-pv_ops last night.  For Xen, at 
> least, it wasn't hard to fit into the clockevent infrastructure.  I 
> just update the stolen time accounting for each cpu when it gets a 
> timer tick; they seem to get a tick every couple of seconds even when 
> idle.

touching the 'timer tick' is the wrong approach. 'stolen time' only 
matters to the /scheduler tick/. So extend the hypervisor interface to 
allow the injection of 'virtual' scheduler tick events: via the use of a 
special clockevents device - do not change clockevents itself.

	Ingo
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