Hello all, Can I ask some question of the offloading function with Virtio-NIC? I'm interested in KVM virtualization. The virtual NIC is different from real hardward. And there is also a big distance between Virtio-NIC and E1000-NIC. The offloading function of Virtio-NIC close related with the function of host's real hardware. Associate Feature bits: VIRTIO_NET_F_GUEST_... VIRTIO_NET_F_HOST_... --------------------------------------------------- command: enable rx: guest) # ethtool -K eth0 enable tx: guest) # ethtool -K eth0 enable gs: guest) # ethtool -K eth0 enable tso: guest) # ethtool -K eth0 enable gso: guest) # ethtool -K eth0 enable lro: guest) # ethtool -K eth0 enable gro: guest) # ethtool -K eth0 Those steps work well with Virtual E1000-NIC, but it always fail when using Virtio-NIC. --------------------------------------------------- After setup, I have two check method. For example: 1. enable tso 2. check the output of 'ethtool -k eth0' 3. send large file from guest to host by scp, listen by tcpdump during transferring file. and check if there contains some large packet($length > 1514). The check method works with Virtual E1000-NIC, but it always fail when using Virtio-NIC. --------------------------------------------------- My question: 1. How to setup offloading function of Virtio-NIC? 2. How about my check method of offloading function(transferring file, check packet length by tcpdump)? 3. Is there some detail user guide for Virtio-NIC? Best Regards, Amos -- 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
