From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by dpdk.org (Postfix) with ESMTP id 091DB9A8A for ; Thu, 12 Feb 2015 20:58:31 +0100 (CET) Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga101.fm.intel.com with ESMTP; 12 Feb 2015 11:58:29 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.09,566,1418112000"; d="scan'208";a="677127883" Received: from irvmail001.ir.intel.com ([163.33.26.43]) by fmsmga002.fm.intel.com with ESMTP; 12 Feb 2015 11:58:28 -0800 Received: from sivswdev02.ir.intel.com (sivswdev02.ir.intel.com [10.237.217.46]) by irvmail001.ir.intel.com (8.14.3/8.13.6/MailSET/Hub) with ESMTP id t1CJwR7a001950; Thu, 12 Feb 2015 19:58:27 GMT Received: from sivswdev02.ir.intel.com (localhost [127.0.0.1]) by sivswdev02.ir.intel.com with ESMTP id t1CJwRX2013718; Thu, 12 Feb 2015 19:58:27 GMT Received: (from jmcnam2x@localhost) by sivswdev02.ir.intel.com with id t1CJwQUP013712; Thu, 12 Feb 2015 19:58:26 GMT From: John McNamara To: dev@dpdk.org Date: Thu, 12 Feb 2015 19:57:54 +0000 Message-Id: <1423771077-13665-1-git-send-email-john.mcnamara@intel.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1419266844-4848-1-git-send-email-bruce.richardson@intel.com> References: <1419266844-4848-1-git-send-email-bruce.richardson@intel.com> Subject: [dpdk-dev] [PATCH 0/3] DPDK ethdev callback support X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 12 Feb 2015 19:58:32 -0000 This patchset is for a small addition to the ethdev library, to add in support for callbacks at the RX and TX stages. This allows packet processing to be done on packets before they get returned to applications using rte_eth_rx_burst call. See the RFC cover letter for the use cases: http://dpdk.org/ml/archives/dev/2014-December/010491.html For this version we spent some time investigating Stephen Hemminger's suggestion of using the userspace RCU (read-copy-update) library for SMP safety: http://urcu.so/ The default liburcu (which defaulted to liburcu-mb) requires the least interaction from the end user but showed a 25% drop in packet throughput in the callback sample app. The liburcu-qsbr (quiescent state) variant showed a 1% drop in packet throughput in the callback sample app. However it requires registered RCU threads in the program to periodically announce quiescent states. This makes it more difficult to implement for end user applications. For this release we will document that callbacks should be added/removed on stopped ports. Version 1 changes: * Added callback removal functions. * Minor fixes. Richardson, Bruce (3): ethdev: rename callbacks field to intr_cbs ethdev: Add in data rxtx callback support examples: example showing use of callbacks. app/test/virtual_pmd.c | 2 +- examples/rxtx_callbacks/Makefile | 57 ++++++++ examples/rxtx_callbacks/basicfwd.c | 222 ++++++++++++++++++++++++++++++++ examples/rxtx_callbacks/basicfwd.h | 46 +++++++ lib/librte_ether/rte_ethdev.c | 177 ++++++++++++++++++++++++-- lib/librte_ether/rte_ethdev.h | 175 +++++++++++++++++++++++++- lib/librte_pmd_bond/rte_eth_bond_api.c | 2 +- 7 files changed, 667 insertions(+), 14 deletions(-) create mode 100644 examples/rxtx_callbacks/Makefile create mode 100644 examples/rxtx_callbacks/basicfwd.c create mode 100644 examples/rxtx_callbacks/basicfwd.h -- 1.7.4.1