From: "Michael S. Tsirkin" <m...@redhat.com> Date: Tue, 7 Feb 2017 06:15:13 +0200
> On Thu, Feb 02, 2017 at 07:14:05PM -0800, John Fastabend wrote: >> This series adds adjust head support for virtio. The following is my >> test setup. I use qemu + virtio as follows, >> >> ./x86_64-softmmu/qemu-system-x86_64 \ >> -hda /var/lib/libvirt/images/Fedora-test0.img \ >> -m 4096 -enable-kvm -smp 2 -netdev tap,id=hn0,queues=4,vhost=on \ >> -device >> virtio-net-pci,netdev=hn0,mq=on,guest_tso4=off,guest_tso6=off,guest_ecn=off,guest_ufo=off,vectors=9 >> >> In order to use XDP with virtio until LRO is supported TSO must be >> turned off in the host. The important fields in the above command line >> are the following, >> >> guest_tso4=off,guest_tso6=off,guest_ecn=off,guest_ufo=off >> >> Also note it is possible to conusme more queues than can be supported >> because when XDP is enabled for retransmit XDP attempts to use a queue >> per cpu. My standard queue count is 'queues=4'. >> >> After loading the VM I run the relevant XDP test programs in, >> >> ./sammples/bpf >> >> For this series I tested xdp1, xdp2, and xdp_tx_iptunnel. I usually test >> with iperf (-d option to get bidirectional traffic), ping, and pktgen. >> I also have a modified xdp1 that returns XDP_PASS on any packet to ensure >> the normal traffic path to the stack continues to work with XDP loaded. >> >> It would be great to automate this soon. At the moment I do it by hand >> which is starting to get tedious. >> >> v2: original series dropped trace points after merge. > > So I'd say ok, let's go ahead and merge this for now. Ok, done. Thanks everyone.
