From mboxrd@z Thu Jan 1 00:00:00 1970 From: John Fastabend Subject: [net-next PATCH 0/5] XDP adjust head support for virtio Date: Thu, 02 Feb 2017 15:20:08 -0800 Message-ID: <20170202231404.14366.64298.stgit@john-Precision-Tower-5810> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Cc: john.r.fastabend@intel.com, netdev@vger.kernel.org, john.fastabend@gmail.com To: kubakici@wp.pl, jasowang@redhat.com, ast@fb.com, mst@redhat.com Return-path: Received: from mail-pg0-f67.google.com ([74.125.83.67]:36334 "EHLO mail-pg0-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751585AbdBBXUZ (ORCPT ); Thu, 2 Feb 2017 18:20:25 -0500 Received: by mail-pg0-f67.google.com with SMTP id 75so231265pgf.3 for ; Thu, 02 Feb 2017 15:20:25 -0800 (PST) Sender: netdev-owner@vger.kernel.org List-ID: 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. --- John Fastabend (5): virtio_net: wrap rtnl_lock in test for calling with lock already held virtio_net: factor out xdp handler for readability virtio_net: remove duplicate queue pair binding in XDP virtio_net: refactor freeze/restore logic into virtnet reset logic virtio_net: XDP support for adjust_head drivers/net/virtio_net.c | 334 ++++++++++++++++++++++++++++++---------------- drivers/virtio/virtio.c | 42 +++--- include/linux/virtio.h | 4 + 3 files changed, 243 insertions(+), 137 deletions(-)