+kvm What value are you using for each? Try running your guest OS with idle=poll. If performance does not improve then message passing latency is not the source of your performance reduction. (And tuning those module parameters is not going to help.) On Fri, Feb 9, 2018 at 12:21 AM, Li Qiang <liq3ea@xxxxxxxxx> wrote: > Hi David, > > Recently I have performance reduction when moving the redis into virtual > machine. > Then I have seen your great talk. > -->http://www.linux-kvm.org/images/a/ac/02x03-Davit_Matalack-KVM_Message_passing_Performance.pdf > > We take some tunning of the three parameter: > halt_poll_ns halt_poll_ns_grow halt_poll_ns_shrink > > But can't get an obvious performance promotion. > And also we try to not exit executing HLT but also no promotion. > > So could you please tell your tunning parameter. > Or some hints to this issue. > > Thanks, > Li Qiang
