On Mon, Apr 22, 2013 at 4:44 PM, Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote: > On Mon, 2013-04-22 at 16:32 -0400, Rik van Riel wrote: >> >> IIRC one of the reasons was that the performance improvement wasn't >> as obvious. Rescheduling VCPUs takes a fair amount of time, quite >> probably more than the typical hold time of a spinlock. > > IIRC it would spin for a while before blocking.. > > /me goes re-read some of that thread... > > Ah, its because PLE is curing most of it.. !PLE it had huge gains but > apparently nobody cares about !PLE hardware anymore :-) > For now, I don't know how good it can work with PLE. But I think it should save the time of VMEXIT on PLE machine. -- 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
