Messages in this thread | | | Date | Wed, 06 Jul 2011 12:08:48 -0400 | From | Rik van Riel <> | Subject | Re: [PATCH v5 4/9] KVM-HV: KVM Steal time implementation |
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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@redhat.com> > CC: Rik van Riel<riel@redhat.com> > CC: Jeremy Fitzhardinge<jeremy.fitzhardinge@citrix.com> > CC: Peter Zijlstra<peterz@infradead.org> > CC: Avi Kivity<avi@redhat.com> > CC: Anthony Liguori<aliguori@us.ibm.com> > CC: Eric B Munson<emunson@mgebm.net>
Acked-by: Rik van Riel <riel@redhat.com>
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