* Avi Kivity <avi@xxxxxxxxxx> [2009-06-05 08:21:43]: > Balbir Singh wrote: >>> But then there is no other way to make a *guarantee*, guarantees come >>> at a cost of idling resources, no? Can you show me any other >>> combination that will provide the guarantee and without idling the >>> system for the specified guarantees? >>> >> >> OK, I see part of your concern, but I think we could do some >> optimizations during design. For example if all groups have reached >> their hard-limit and the system is idle, should we do start a new hard >> limit interval and restart, so that idleness can be removed. Would >> that be an acceptable design point? > > I think so. Given guarantees G1..Gn (0 <= Gi <= 1; sum(Gi) <= 1), and a > cpu hog running in each group, how would the algorithm divide resources? > As per the matrix calculation, but as soon as we reach an idle point, we redistribute the b/w and start a new quantum so to speak, where all groups are charged up to their hard limits. For your question, if there is a CPU hog running, it would be as per the matrix calculation, since the system has no idle point during the bandwidth period. -- Balbir -- 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
