From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?UTF-8?q?Bj=C3=B6rn=20T=C3=B6pel?= Subject: [PATCH 0/5] Introducing ixgbe AF_XDP ZC support Date: Mon, 24 Sep 2018 18:35:52 +0200 Message-ID: <20180924163557.1187-1-bjorn.topel@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: =?UTF-8?q?Bj=C3=B6rn=20T=C3=B6pel?= , magnus.karlsson@intel.com, magnus.karlsson@gmail.com, ast@kernel.org, daniel@iogearbox.net, netdev@vger.kernel.org, brouer@redhat.com, u9012063@gmail.com, tuc@vmware.com To: jeffrey.t.kirsher@intel.com, intel-wired-lan@lists.osuosl.org Return-path: Received: from mga01.intel.com ([192.55.52.88]:63300 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728137AbeIXWku (ORCPT ); Mon, 24 Sep 2018 18:40:50 -0400 Sender: netdev-owner@vger.kernel.org List-ID: From: Björn Töpel This patch set introduces zero-copy AF_XDP support for Intel's ixgbe driver. The ixgbe zero-copy code is located in its own file ixgbe_xsk.[ch], analogous to the i40e ZC support. Again, as in i40e, code paths have been copied from the XDP path to the zero-copy path. Going forward we will try to generalize more code between the AF_XDP ZC drivers, and also reduce the heavy C&P. We have run some benchmarks on a dual socket system with two Broadwell E5 2660 @ 2.0 GHz with hyperthreading turned off. Each socket has 14 cores which gives a total of 28, but only two cores are used in these experiments. One for TR/RX and one for the user space application. The memory is DDR4 @ 2133 MT/s (1067 MHz) and the size of each DIMM is 8192MB and with 8 of those DIMMs in the system we have 64 GB of total memory. The compiler used is GCC 7.3.0. The NIC is Intel 82599ES/X520-2 10Gbit/s using the ixgbe driver. Below are the results in Mpps of the 82599ES/X520-2 NIC benchmark runs for 64B and 1500B packets, generated by a commercial packet generator HW blasting packets at full 10Gbit/s line rate. The results are with retpoline and all other spectre and meltdown fixes. AF_XDP performance 64B packets: Benchmark XDP_DRV with zerocopy rxdrop 14.7 txpush 14.6 l2fwd 11.1 AF_XDP performance 1500B packets: Benchmark XDP_DRV with zerocopy rxdrop 0.8 l2fwd 0.8 XDP performance on our system as a base line. 64B packets: XDP stats CPU Mpps issue-pps XDP-RX CPU 16 14.7 0 1500B packets: XDP stats CPU Mpps issue-pps XDP-RX CPU 16 0.8 0 The structure of the patch set is as follows: Patch 1: Introduce Rx/Tx ring enable/disable functionality Patch 2: Preparatory patche to ixgbe driver code for RX Patch 3: ixgbe zero-copy support for RX Patch 4: Preparatory patch to ixgbe driver code for TX Patch 5: ixgbe zero-copy support for TX Cheers! Björn Björn Töpel (5): ixgbe: added Rx/Tx ring disable/enable functions ixgbe: move common Rx functions to ixgbe_txrx_common.h ixgbe: add AF_XDP zero-copy Rx support ixgbe: move common Tx functions to ixgbe_txrx_common.h ixgbe: add AF_XDP zero-copy Tx support drivers/net/ethernet/intel/ixgbe/Makefile | 3 +- drivers/net/ethernet/intel/ixgbe/ixgbe.h | 27 +- drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 290 ++++++- .../ethernet/intel/ixgbe/ixgbe_txrx_common.h | 50 ++ drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c | 814 ++++++++++++++++++ 5 files changed, 1139 insertions(+), 45 deletions(-) create mode 100644 drivers/net/ethernet/intel/ixgbe/ixgbe_txrx_common.h create mode 100644 drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c -- 2.17.1