I am test virtio-vhost in 10G environment host info cpu E2680@2.7GHz memory 16G network intel 82599BE os centos 7 VM info cpu 4 memory 4G network using virtio vhost os centos 7 I using pktgen to send udp package, the result like follow 64b 230Mb/s 1400b 5.9Gb/s I test the speed in VMware too, the result like follow 64b 700Mb/s 1400 9.3Gb/s I am very surprised why the speed with virtio-vhost is slow so I test to analysis this by using perf tool I found the tun_sendmsg occupancy rate of 35% tun_sendmsg using copy_from_user to get the data from VM Perhaps mapping could improve the performance ? or other Another improvement method ? -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
