On 11/17/2014 02:56 AM, Michael S. Tsirkin wrote: > On Sun, Nov 16, 2014 at 06:18:18PM +0200, Gleb Natapov wrote: >> Hi Michael, >> >> I am playing with vhost multiqueue capability and have a question about >> vhost multiqueue and RSS (receive side steering). My setup has Mellanox >> ConnectX-3 NIC which supports multiqueue and RSS. Network related >> parameters for qemu are: >> >> -netdev tap,id=hn0,script=qemu-ifup.sh,vhost=on,queues=4 >> -device virtio-net-pci,netdev=hn0,id=nic1,mq=on,vectors=10 >> >> In a guest I ran "ethtool -L eth0 combined 4" to enable multiqueue. >> >> I am running one tcp stream into the guest using iperf. Since there is >> only one tcp stream I expect it to be handled by one queue only but >> this seams to be not the case. ethtool -S on a host shows that the >> stream is handled by one queue in the NIC, just like I would expect, >> but in a guest all 4 virtio-input interrupt are incremented. Am I >> missing any configuration? > I don't see anything obviously wrong with what you describe. > Maybe, somehow, same irqfd got bound to multiple MSI vectors? > To see, can you try dumping struct kvm_irqfd that's passed to kvm? > > >> -- >> Gleb. This sounds like a regression, which kernel/qemu version did you use? _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
