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?
--
Gleb.
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