From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 65F57A0C45; Wed, 22 Sep 2021 16:10:52 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 41FDA41198; Wed, 22 Sep 2021 16:10:51 +0200 (CEST) Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by mails.dpdk.org (Postfix) with ESMTP id 311EF41196 for ; Wed, 22 Sep 2021 16:10:41 +0200 (CEST) X-IronPort-AV: E=McAfee;i="6200,9189,10114"; a="203094897" X-IronPort-AV: E=Sophos;i="5.85,314,1624345200"; d="scan'208";a="203094897" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Sep 2021 07:10:35 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.85,314,1624345200"; d="scan'208";a="512990022" Received: from sivswdev08.ir.intel.com ([10.237.217.47]) by fmsmga008.fm.intel.com with ESMTP; 22 Sep 2021 07:10:21 -0700 From: Konstantin Ananyev To: dev@dpdk.org Cc: xiaoyun.li@intel.com, anoobj@marvell.com, jerinj@marvell.com, ndabilpuram@marvell.com, adwivedi@marvell.com, shepard.siegel@atomicrules.com, ed.czeck@atomicrules.com, john.miller@atomicrules.com, irusskikh@marvell.com, ajit.khaparde@broadcom.com, somnath.kotur@broadcom.com, rahul.lakkireddy@chelsio.com, hemant.agrawal@nxp.com, sachin.saxena@oss.nxp.com, haiyue.wang@intel.com, johndale@cisco.com, hyonkim@cisco.com, qi.z.zhang@intel.com, xiao.w.wang@intel.com, humin29@huawei.com, yisen.zhuang@huawei.com, oulijun@huawei.com, beilei.xing@intel.com, jingjing.wu@intel.com, qiming.yang@intel.com, matan@nvidia.com, viacheslavo@nvidia.com, sthemmin@microsoft.com, longli@microsoft.com, heinrich.kuhn@corigine.com, kirankumark@marvell.com, andrew.rybchenko@oktetlabs.ru, mczekaj@marvell.com, jiawenwu@trustnetic.com, jianwang@trustnetic.com, maxime.coquelin@redhat.com, chenbo.xia@intel.com, thomas@monjalon.net, ferruh.yigit@intel.com, mdr@ashroe.eu, jay.jayatheerthan@intel.com, Konstantin Ananyev Date: Wed, 22 Sep 2021 15:09:48 +0100 Message-Id: <20210922140953.19388-1-konstantin.ananyev@intel.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20210820162834.12544-1-konstantin.ananyev@intel.com> References: <20210820162834.12544-1-konstantin.ananyev@intel.com> Subject: [dpdk-dev] [RFC v2 0/5] hide eth dev related structures X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" The aim of these patch series is to make rte_ethdev core data structures (rte_eth_dev, rte_eth_dev_data, rte_eth_rxtx_callback, etc.) internal to DPDK and not visible to the user. That should allow future possible changes to core ethdev related structures to be transparent to the user and help to improve ABI/API stability. Note that current ethdev API is preserved, but it is a formal ABI break. The work is based on previous discussions at: https://www.mail-archive.com/dev@dpdk.org/msg211405.html https://www.mail-archive.com/dev@dpdk.org/msg216685.html and consists of the following main points: 1. Copy public 'fast' function pointers (rx_pkt_burst(), etc.) and related data pointer from rte_eth_dev into a separate flat array. We keep it public to still be able to use inline functions for these 'fast' calls (like rte_eth_rx_burst(), etc.) to avoid/minimize slowdown. Note that apart from function pointers itself, each element of this flat array also contains two opaque pointers for each ethdev: 1) a pointer to an array of internal queue data pointers 2) points to array of queue callback data pointers. Note that exposing this extra information allows us to avoid extra changes inside PMD level, plus should help to avoid possible performance degradation. 2. Change implementation of 'fast' inline ethdev functions (rte_eth_rx_burst(), etc.) to use new public flat array. While it is an ABI breakage, this change is intended to be transparent for both users (no changes in user app is required) and PMD developers (no changes in PMD is required). One extra note - with new implementation RX/TX callback invocation will cost one extra function call with this changes. That might cause some slowdown for code-path with RX/TX callbacks heavily involved. Hope such tradeoff is acceptable for the community. 3. Move rte_eth_dev, rte_eth_dev_data, rte_eth_rxtx_callback and related things into internal header: . That approach was selected to: - Avoid(/minimize) possible performance losses. - Minimize required changes inside PMDs. Performance testing results (ICX 2.0GHz): - testpmd macswap fwd mode, plus a) no RX/TX callbacks: performance numbers remains the same before and after the patch b) bpf-load rx 0 0 JM ./dpdk.org/examples/bpf/t3.o: ~2% slowdown Would like to thank Ferruh and Jerrin for reviewing and testing previous version of this RFC. All interested parties please provide your feedback for v2. If there would be no major objections, I plan to submit a proper v3 patch in next few days. Konstantin Ananyev (5): ethdev: allocate max space for internal queue array ethdev: change input parameters for rx_queue_count ethdev: copy ethdev 'burst' API into separate structure ethdev: make burst functions to use new flat array ethdev: hide eth dev related structures app/test-pmd/config.c | 23 +- drivers/common/octeontx2/otx2_sec_idev.c | 2 +- drivers/crypto/octeontx2/otx2_cryptodev_ops.c | 2 +- drivers/net/ark/ark_ethdev_rx.c | 4 +- drivers/net/ark/ark_ethdev_rx.h | 3 +- drivers/net/atlantic/atl_ethdev.h | 2 +- drivers/net/atlantic/atl_rxtx.c | 9 +- drivers/net/bnxt/bnxt_ethdev.c | 8 +- drivers/net/cxgbe/base/adapter.h | 2 +- drivers/net/dpaa/dpaa_ethdev.c | 9 +- drivers/net/dpaa2/dpaa2_ethdev.c | 9 +- drivers/net/dpaa2/dpaa2_ptp.c | 2 +- drivers/net/e1000/e1000_ethdev.h | 6 +- drivers/net/e1000/em_rxtx.c | 4 +- drivers/net/e1000/igb_rxtx.c | 4 +- drivers/net/enic/enic_ethdev.c | 12 +- drivers/net/fm10k/fm10k.h | 2 +- drivers/net/fm10k/fm10k_rxtx.c | 4 +- drivers/net/hns3/hns3_rxtx.c | 7 +- drivers/net/hns3/hns3_rxtx.h | 2 +- drivers/net/i40e/i40e_rxtx.c | 4 +- drivers/net/i40e/i40e_rxtx.h | 3 +- drivers/net/iavf/iavf_rxtx.c | 4 +- drivers/net/iavf/iavf_rxtx.h | 2 +- drivers/net/ice/ice_rxtx.c | 4 +- drivers/net/ice/ice_rxtx.h | 2 +- drivers/net/igc/igc_txrx.c | 5 +- drivers/net/igc/igc_txrx.h | 3 +- drivers/net/ixgbe/ixgbe_ethdev.h | 3 +- drivers/net/ixgbe/ixgbe_rxtx.c | 4 +- drivers/net/mlx5/mlx5_rx.c | 26 +- drivers/net/mlx5/mlx5_rx.h | 2 +- drivers/net/netvsc/hn_rxtx.c | 4 +- drivers/net/netvsc/hn_var.h | 3 +- drivers/net/nfp/nfp_rxtx.c | 4 +- drivers/net/nfp/nfp_rxtx.h | 3 +- drivers/net/octeontx2/otx2_ethdev.h | 2 +- drivers/net/octeontx2/otx2_ethdev_ops.c | 8 +- drivers/net/sfc/sfc_ethdev.c | 12 +- drivers/net/thunderx/nicvf_ethdev.c | 3 +- drivers/net/thunderx/nicvf_rxtx.c | 4 +- drivers/net/thunderx/nicvf_rxtx.h | 2 +- drivers/net/txgbe/txgbe_ethdev.h | 3 +- drivers/net/txgbe/txgbe_rxtx.c | 4 +- drivers/net/vhost/rte_eth_vhost.c | 4 +- lib/ethdev/ethdev_driver.h | 152 +++++++++ lib/ethdev/ethdev_private.c | 84 +++++ lib/ethdev/ethdev_private.h | 7 + lib/ethdev/rte_ethdev.c | 78 +++-- lib/ethdev/rte_ethdev.h | 288 ++++++++++++------ lib/ethdev/rte_ethdev_core.h | 168 +++------- lib/ethdev/version.map | 6 + lib/eventdev/rte_event_eth_rx_adapter.c | 2 +- lib/eventdev/rte_event_eth_tx_adapter.c | 2 +- lib/eventdev/rte_eventdev.c | 2 +- 55 files changed, 643 insertions(+), 380 deletions(-) -- 2.26.3