On Thu, Oct 26, 2017 at 01:53:12PM -0400, Matthew Rosato wrote: > > > > > Are you using the same binding as mentioned in previous mail sent by you? it > > might be caused by cpu convention between pktgen and vhost, could you please > > try to run pktgen from another idle cpu by adjusting the binding? > > I don't think that's the case -- I can cause pktgen to hang in the guest > without any cpu binding, and with vhost disabled even.
Yes, I did a test and it also hangs in guest, before we figure it out, maybe you try udp with uperf with this case? VM -> Host Host -> VM VM -> VM > > > BTW, did you see any improvement when running pktgen from the host if no > > regression was found? Since this can be reproduced with only 1 vcpu for > > guest, may you try this bind? This might help simplify the problem. > > vcpu0 -> cpu2 > > vhost -> cpu3 > > pktgen -> cpu1 > > > > Yes -- I ran the pktgen test from host to guest with the binding > described. I see an approx 5% increase in throughput from 4.12->4.13. > Some numbers: > > host-4.12: 1384486.2pps 663.8MB/sec > host-4.13: 1434598.6pps 688.2MB/sec That's great, at least we are aligned in this case. Jason, any thoughts on this? Wei >
