Re: [Xen-devel] [PATCH 1/2] cpu steal time accounting

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 22 Feb 2006, at 23:58, Dan Hecht wrote:

> To solve this, it may be best to have the hypervisor interface expose 
> per-vcpu stolen time directly, rather than vcpu_time.  Then the guest 
> does not need to try to guess whether to charge (system_time - 
> vcpu_time) against idle or steal.
Yes, the distinction between stolen and available time does makes sense 
(although I'm not sure 'available' is a great name) otherwise you can't 
account for wakeup latencies. account_steal_time() would need to be 
modified in Linux, though, as we would not need its dodgy heuristic for 
deciding whether to account to stolen time or iowait/idle.
 -- Keir


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