On Wed, 29 Jun 2011, Glauber Costa wrote: > This is a first proposal for using steal time information > to influence the scheduler. There are a lot of optimizations > and fine grained adjustments to be done, but it is working reasonably > so far for me (mostly) > > With this patch (and some host pinnings to demonstrate the situation), > two vcpus with very different steal time (Say 80 % vs 1 %) will not get > an even distribution of processes. This is a situation that can naturally > arise, specially in overcommited scenarios. Previosly, the guest scheduler > would wrongly think that all cpus have the same ability to run processes, > lowering the overall throughput. > > 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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