On Tue, 10 Oct 2017 17:11:09 +1000 Nicholas Piggin <npiggin@xxxxxxxxx> wrote: > For shared processor guests (e.g., KVM), add an idle polling mode rather > than immediately returning to the hypervisor when the guest CPU goes > idle. > > Test setup is a 2 socket POWER9 with 4 guests running, each with vCPUs > equal to 1/2 of real of CPUs. Saturated each guest with tbench. Using > polling idle gives about 1.4x throughput. Actually it's even more noticeable when the host is not over subscribed by the looks. 2.5x-3x increase in throughput for just a single guest. Thanks, Nick -- To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
