hi, I tested the vhost-user, but i dont get a better performance. The test case is VM2VM which are in the same host.
if we use the vhost-net in kernel, we get a 20 Gbits/sec throughput, but vhost-user is only 5Gits/sec. vhost-net: qemu-system-x86_64 -enable-kvm -m 1G -smp 4 \ -cpu host \ -netdev tap,ifname=tap0,id=hostnet0,vhost=on,script=no,downscript=no -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:02:d9:01 \ -mem-prealloc \ -display none -nographic \ /root/zth/local/qemu-img/__centos7_base.img vhost-user: qemu-system-x86_64 -enable-kvm -m 1G -smp 1 \ -chardev socket,id=char1,path=/tmp/dpdkvhostclient0,server \ -netdev type=vhost-user,id=mynet1,chardev=char1,vhostforce \ -device virtio-net-pci,netdev=mynet1,mac=52:54:00:02:d9:01 \ -object memory-backend-file,id=mem0,size=1G,mem-path=/dev/hugepages,share=on \ -numa node,memdev=mem0,nodeid=0 \ -monitor unix:/var/run/qemu.sock,server,nowait \ -mem-prealloc \ -display none -nographic \ /root/zth/local/qemu-img/__centos7_base.img The vhost-user does't do better in the VM2VM case ?
