On Mon, 04 Jul 2011, Glauber Costa wrote: > To implement steal time, we need the hypervisor to pass the guest > information about how much time was spent running other processes > outside the VM, while the vcpu had meaningful work to do - halt > time does not count. > > This information is acquired through the run_delay field of > delayacct/schedstats infrastructure, that counts time spent in a > runqueue but not running. > > Steal time is a per-cpu information, so the traditional MSR-based > infrastructure is used. A new msr, KVM_MSR_STEAL_TIME, holds the > memory area address containing information about steal time > > This patch contains the hypervisor part of the steal time infrasructure, > and can be backported independently of the guest portion. > > Signed-off-by: Glauber Costa <glommer@xxxxxxxxxx> > CC: Rik van Riel <riel@xxxxxxxxxx> > CC: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx> > CC: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > CC: Avi Kivity <avi@xxxxxxxxxx> > CC: Anthony Liguori <aliguori@xxxxxxxxxx> > CC: Eric B Munson <emunson@xxxxxxxxx> Tested-by: Eric B Munson <emunson@xxxxxxxxx>
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