On 09/02/2015 22:00, Christian Borntraeger wrote: > I can confirm that this also helps uperf with a 1/1 byte round trip work load > between guests on s390. And I can confirm the higher CPU load. This is normally > a no-go for the typical s390 users, which utilize their systems as much as > possible. Your check for single_task_running could actually solve that > problem because on overcommitment this will never switch to polling if the > runqueues get full. > Since this is also runtime configurable and defaults to 0 it should be pretty > painless. > > The only question is: is there a sane way of doing autotuning? The answer is: we'll see. :) I have some ideas, I have to run them through the necessary experiments. Paolo -- 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
