On 07/04/2011 11:32 AM, 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>
Acked-by: Rik van Riel <riel@xxxxxxxxxx> -- All rights reversed -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
