Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751969AbeADDOi (ORCPT + 1 other); Wed, 3 Jan 2018 22:14:38 -0500 Received: from mx1.redhat.com ([209.132.183.28]:57126 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751658AbeADDOh (ORCPT ); Wed, 3 Jan 2018 22:14:37 -0500 From: Jason Wang To: netdev@vger.kernel.org, linux-kernel@vger.kernel.org Cc: mst@redhat.com, jbrouer@redhat.com, Jason Wang Subject: [PATCH net-next V2 0/2] XDP transmission for tuntap Date: Thu, 4 Jan 2018 11:14:26 +0800 Message-Id: <1515035668-6241-1-git-send-email-jasowang@redhat.com> X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Thu, 04 Jan 2018 03:14:37 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: Hi all: This series tries to implement XDP transmission (ndo_xdp_xmit) for tuntap. Pointer ring was used for queuing both XDP buffers and sk_buff, this is done by encoding the type into lowest bit of the pointer and storin XDP metadata in the headroom of XDP buff. Tests gets 3.05 Mpps when doing xdp_redirect_map from ixgbe to VM (testpmd + virtio-net in guest). This gives us ~20% improvments compared to use skb during redirect. Please review. Changes from V1: - slient warnings - fix typos - add skb mode number in the commit log Jason Wang (2): tun/tap: use ptr_ring instead of skb_array tuntap: XDP transmission drivers/net/tap.c | 41 ++++----- drivers/net/tun.c | 239 +++++++++++++++++++++++++++++++++++++++---------- drivers/vhost/net.c | 52 ++++++----- include/linux/if_tap.h | 6 +- include/linux/if_tun.h | 21 ++++- 5 files changed, 269 insertions(+), 90 deletions(-) -- 2.7.4